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diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/ABOUT-NLS b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/ABOUT-NLS deleted file mode 100644 index 3575535a..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/ABOUT-NLS +++ /dev/null @@ -1,1111 +0,0 @@ -1 Notes on the Free Translation Project -*************************************** - -Free software is going international! The Free Translation Project is -a way to get maintainers of free software, translators, and users all -together, so that free software will gradually become able to speak many -languages. A few packages already provide translations for their -messages. - - If you found this `ABOUT-NLS' file inside a distribution, you may -assume that the distributed package does use GNU `gettext' internally, -itself available at your nearest GNU archive site. But you do _not_ -need to install GNU `gettext' prior to configuring, installing or using -this package with messages translated. - - Installers will find here some useful hints. These notes also -explain how users should proceed for getting the programs to use the -available translations. They tell how people wanting to contribute and -work on translations can contact the appropriate team. - - When reporting bugs in the `intl/' directory or bugs which may be -related to internationalization, you should tell about the version of -`gettext' which is used. The information can be found in the -`intl/VERSION' file, in internationalized packages. - -1.1 Quick configuration advice -============================== - -If you want to exploit the full power of internationalization, you -should configure it using - - ./configure --with-included-gettext - -to force usage of internationalizing routines provided within this -package, despite the existence of internationalizing capabilities in the -operating system where this package is being installed. So far, only -the `gettext' implementation in the GNU C library version 2 provides as -many features (such as locale alias, message inheritance, automatic -charset conversion or plural form handling) as the implementation here. -It is also not possible to offer this additional functionality on top -of a `catgets' implementation. Future versions of GNU `gettext' will -very likely convey even more functionality. So it might be a good idea -to change to GNU `gettext' as soon as possible. - - So you need _not_ provide this option if you are using GNU libc 2 or -you have installed a recent copy of the GNU gettext package with the -included `libintl'. - -1.2 INSTALL Matters -=================== - -Some packages are "localizable" when properly installed; the programs -they contain can be made to speak your own native language. Most such -packages use GNU `gettext'. Other packages have their own ways to -internationalization, predating GNU `gettext'. - - By default, this package will be installed to allow translation of -messages. It will automatically detect whether the system already -provides the GNU `gettext' functions. If not, the included GNU -`gettext' library will be used. This library is wholly contained -within this package, usually in the `intl/' subdirectory, so prior -installation of the GNU `gettext' package is _not_ required. -Installers may use special options at configuration time for changing -the default behaviour. The commands: - - ./configure --with-included-gettext - ./configure --disable-nls - -will, respectively, bypass any pre-existing `gettext' to use the -internationalizing routines provided within this package, or else, -_totally_ disable translation of messages. - - When you already have GNU `gettext' installed on your system and run -configure without an option for your new package, `configure' will -probably detect the previously built and installed `libintl.a' file and -will decide to use this. This might not be desirable. You should use -the more recent version of the GNU `gettext' library. I.e. if the file -`intl/VERSION' shows that the library which comes with this package is -more recent, you should use - - ./configure --with-included-gettext - -to prevent auto-detection. - - The configuration process will not test for the `catgets' function -and therefore it will not be used. The reason is that even an -emulation of `gettext' on top of `catgets' could not provide all the -extensions of the GNU `gettext' library. - - Internationalized packages usually have many `po/LL.po' files, where -LL gives an ISO 639 two-letter code identifying the language. Unless -translations have been forbidden at `configure' time by using the -`--disable-nls' switch, all available translations are installed -together with the package. However, the environment variable `LINGUAS' -may be set, prior to configuration, to limit the installed set. -`LINGUAS' should then contain a space separated list of two-letter -codes, stating which languages are allowed. - -1.3 Using This Package -====================== - -As a user, if your language has been installed for this package, you -only have to set the `LANG' environment variable to the appropriate -`LL_CC' combination. Here `LL' is an ISO 639 two-letter language code, -and `CC' is an ISO 3166 two-letter country code. For example, let's -suppose that you speak German and live in Germany. At the shell -prompt, merely execute `setenv LANG de_DE' (in `csh'), -`export LANG; LANG=de_DE' (in `sh') or `export LANG=de_DE' (in `bash'). -This can be done from your `.login' or `.profile' file, once and for -all. - - You might think that the country code specification is redundant. -But in fact, some languages have dialects in different countries. For -example, `de_AT' is used for Austria, and `pt_BR' for Brazil. The -country code serves to distinguish the dialects. - - The locale naming convention of `LL_CC', with `LL' denoting the -language and `CC' denoting the country, is the one use on systems based -on GNU libc. On other systems, some variations of this scheme are -used, such as `LL' or `LL_CC.ENCODING'. You can get the list of -locales supported by your system for your language by running the -command `locale -a | grep '^LL''. - - Not all programs have translations for all languages. By default, an -English message is shown in place of a nonexistent translation. If you -understand other languages, you can set up a priority list of languages. -This is done through a different environment variable, called -`LANGUAGE'. GNU `gettext' gives preference to `LANGUAGE' over `LANG' -for the purpose of message handling, but you still need to have `LANG' -set to the primary language; this is required by other parts of the -system libraries. For example, some Swedish users who would rather -read translations in German than English for when Swedish is not -available, set `LANGUAGE' to `sv:de' while leaving `LANG' to `sv_SE'. - - Special advice for Norwegian users: The language code for Norwegian -bokma*l changed from `no' to `nb' recently (in 2003). During the -transition period, while some message catalogs for this language are -installed under `nb' and some older ones under `no', it's recommended -for Norwegian users to set `LANGUAGE' to `nb:no' so that both newer and -older translations are used. - - In the `LANGUAGE' environment variable, but not in the `LANG' -environment variable, `LL_CC' combinations can be abbreviated as `LL' -to denote the language's main dialect. For example, `de' is equivalent -to `de_DE' (German as spoken in Germany), and `pt' to `pt_PT' -(Portuguese as spoken in Portugal) in this context. - -1.4 Translating Teams -===================== - -For the Free Translation Project to be a success, we need interested -people who like their own language and write it well, and who are also -able to synergize with other translators speaking the same language. -Each translation team has its own mailing list. The up-to-date list of -teams can be found at the Free Translation Project's homepage, -`http://www.iro.umontreal.ca/contrib/po/HTML/', in the "National teams" -area. - - If you'd like to volunteer to _work_ at translating messages, you -should become a member of the translating team for your own language. -The subscribing address is _not_ the same as the list itself, it has -`-request' appended. For example, speakers of Swedish can send a -message to `sv-request@li.org', having this message body: - - subscribe - - Keep in mind that team members are expected to participate -_actively_ in translations, or at solving translational difficulties, -rather than merely lurking around. If your team does not exist yet and -you want to start one, or if you are unsure about what to do or how to -get started, please write to `translation@iro.umontreal.ca' to reach the -coordinator for all translator teams. - - The English team is special. It works at improving and uniformizing -the terminology in use. Proven linguistic skill are praised more than -programming skill, here. - -1.5 Available Packages -====================== - -Languages are not equally supported in all packages. The following -matrix shows the current state of internationalization, as of July -2006. The matrix shows, in regard of each package, for which languages -PO files have been submitted to translation coordination, with a -translation percentage of at least 50%. - - Ready PO files af am ar az be bg bs ca cs cy da de el en en_GB eo - +----------------------------------------------------+ - GNUnet | [] | - a2ps | [] [] [] [] [] | - aegis | () | - ant-phone | () | - anubis | [] | - ap-utils | | - aspell | [] [] [] [] | - bash | [] [] [] | - batchelor | [] | - bfd | | - bibshelf | [] | - binutils | [] | - bison | [] [] | - bison-runtime | [] | - bluez-pin | [] [] [] [] [] | - cflow | [] | - clisp | [] [] | - console-tools | [] [] | - coreutils | [] [] [] [] | - cpio | | - cpplib | [] [] [] | - cryptonit | [] | - darkstat | [] () [] | - dialog | [] [] [] [] [] [] | - diffutils | [] [] [] [] [] [] | - doodle | [] | - e2fsprogs | [] [] | - enscript | [] [] [] [] | - error | [] [] [] [] | - fetchmail | [] [] () [] | - fileutils | [] [] | - findutils | [] [] [] | - flex | [] [] [] | - fslint | [] | - gas | | - gawk | [] [] [] | - gbiff | [] | - gcal | [] | - gcc | [] | - gettext-examples | [] [] [] [] [] | - gettext-runtime | [] [] [] [] [] | - gettext-tools | [] [] | - gimp-print | [] [] [] [] | - gip | [] | - gliv | [] | - glunarclock | [] | - gmult | [] [] | - gnubiff | () | - gnucash | () () [] | - gnucash-glossary | [] () | - gnuedu | | - gnulib | [] [] [] [] [] [] | - gnunet-gtk | | - gnutls | | - gpe-aerial | [] [] | - gpe-beam | [] [] | - gpe-calendar | [] [] | - gpe-clock | [] [] | - gpe-conf | [] [] | - gpe-contacts | | - gpe-edit | [] | - gpe-filemanager | | - gpe-go | [] | - gpe-login | [] [] | - gpe-ownerinfo | [] [] | - gpe-package | | - gpe-sketchbook | [] [] | - gpe-su | [] [] | - gpe-taskmanager | [] [] | - gpe-timesheet | [] | - gpe-today | [] [] | - gpe-todo | | - gphoto2 | [] [] [] [] | - gprof | [] [] | - gpsdrive | () () | - gramadoir | [] [] | - grep | [] [] [] [] [] [] | - gretl | | - gsasl | | - gss | | - gst-plugins | [] [] [] [] | - gst-plugins-base | [] [] [] | - gst-plugins-good | [] [] [] [] [] [] [] | - gstreamer | [] [] [] [] [] [] [] | - gtick | [] () | - gtkam | [] [] [] | - gtkorphan | [] [] | - gtkspell | [] [] [] [] | - gutenprint | [] | - hello | [] [] [] [] [] | - id-utils | [] [] | - impost | | - indent | [] [] [] | - iso_3166 | [] [] | - iso_3166_1 | [] [] [] [] [] | - iso_3166_2 | | - iso_3166_3 | [] | - iso_4217 | [] | - iso_639 | [] [] | - jpilot | [] | - jtag | | - jwhois | | - kbd | [] [] [] [] | - keytouch | | - keytouch-editor | | - keytouch-keyboa... | | - latrine | () | - ld | [] | - leafpad | [] [] [] [] [] | - libc | [] [] [] [] [] | - libexif | [] | - libextractor | [] | - libgpewidget | [] [] [] | - libgpg-error | [] | - libgphoto2 | [] [] | - libgphoto2_port | [] [] | - libgsasl | | - libiconv | [] [] | - libidn | [] [] | - lifelines | [] () | - lilypond | [] | - lingoteach | | - lynx | [] [] [] [] | - m4 | [] [] [] [] | - mailutils | [] | - make | [] [] | - man-db | [] () [] [] | - minicom | [] [] [] | - mysecretdiary | [] [] | - nano | [] [] () [] | - nano_1_0 | [] () [] [] | - opcodes | [] | - parted | | - pilot-qof | [] | - psmisc | [] | - pwdutils | | - python | | - qof | | - radius | [] | - recode | [] [] [] [] [] [] | - rpm | [] [] | - screem | | - scrollkeeper | [] [] [] [] [] [] [] [] | - sed | [] [] [] | - sh-utils | [] [] | - shared-mime-info | [] [] [] | - sharutils | [] [] [] [] [] [] | - shishi | | - silky | | - skencil | [] () | - sketch | [] () | - solfege | | - soundtracker | [] [] | - sp | [] | - stardict | [] | - system-tools-ba... | [] [] [] [] [] [] [] [] [] | - tar | [] | - texinfo | [] [] [] | - textutils | [] [] [] | - tin | () () | - tp-robot | [] | - tuxpaint | [] [] [] [] [] | - unicode-han-tra... | | - unicode-transla... | | - util-linux | [] [] [] [] | - vorbis-tools | [] [] [] [] | - wastesedge | () | - wdiff | [] [] [] [] | - wget | [] [] | - xchat | [] [] [] [] [] | - xkeyboard-config | | - xpad | [] [] | - +----------------------------------------------------+ - af am ar az be bg bs ca cs cy da de el en en_GB eo - 11 0 1 2 8 21 1 42 43 2 62 99 18 1 16 16 - - es et eu fa fi fr ga gl gu he hi hr hu id is it - +--------------------------------------------------+ - GNUnet | | - a2ps | [] [] [] () | - aegis | | - ant-phone | [] | - anubis | [] | - ap-utils | [] [] | - aspell | [] [] [] | - bash | [] [] [] | - batchelor | [] [] | - bfd | [] | - bibshelf | [] [] [] | - binutils | [] [] [] | - bison | [] [] [] [] [] [] | - bison-runtime | [] [] [] [] [] | - bluez-pin | [] [] [] [] [] | - cflow | | - clisp | [] [] | - console-tools | | - coreutils | [] [] [] [] [] [] | - cpio | [] [] [] | - cpplib | [] [] | - cryptonit | [] | - darkstat | [] () [] [] [] | - dialog | [] [] [] [] [] [] [] [] | - diffutils | [] [] [] [] [] [] [] [] [] | - doodle | [] [] | - e2fsprogs | [] [] [] | - enscript | [] [] [] | - error | [] [] [] [] [] | - fetchmail | [] | - fileutils | [] [] [] [] [] [] | - findutils | [] [] [] [] | - flex | [] [] [] | - fslint | [] | - gas | [] [] | - gawk | [] [] [] [] | - gbiff | [] | - gcal | [] [] | - gcc | [] | - gettext-examples | [] [] [] [] [] | - gettext-runtime | [] [] [] [] [] [] | - gettext-tools | [] [] [] | - gimp-print | [] [] | - gip | [] [] [] | - gliv | () | - glunarclock | [] [] [] | - gmult | [] [] [] | - gnubiff | () () | - gnucash | () () () | - gnucash-glossary | [] [] | - gnuedu | [] | - gnulib | [] [] [] [] [] [] [] [] | - gnunet-gtk | | - gnutls | | - gpe-aerial | [] [] | - gpe-beam | [] [] | - gpe-calendar | [] [] [] [] | - gpe-clock | [] [] [] [] | - gpe-conf | [] | - gpe-contacts | [] [] | - gpe-edit | [] [] [] [] | - gpe-filemanager | [] | - gpe-go | [] [] [] | - gpe-login | [] [] [] | - gpe-ownerinfo | [] [] [] [] [] | - gpe-package | [] | - gpe-sketchbook | [] [] | - gpe-su | [] [] [] [] | - gpe-taskmanager | [] [] [] | - gpe-timesheet | [] [] [] [] | - gpe-today | [] [] [] [] | - gpe-todo | [] | - gphoto2 | [] [] [] [] [] | - gprof | [] [] [] [] | - gpsdrive | () () [] () | - gramadoir | [] [] | - grep | [] [] [] [] [] [] [] [] [] [] [] [] | - gretl | [] [] [] | - gsasl | [] | - gss | [] | - gst-plugins | [] [] [] | - gst-plugins-base | [] [] | - gst-plugins-good | [] [] [] | - gstreamer | [] [] [] | - gtick | [] [] [] [] [] | - gtkam | [] [] [] [] | - gtkorphan | [] [] | - gtkspell | [] [] [] [] [] [] | - gutenprint | [] | - hello | [] [] [] [] [] [] [] [] [] [] [] [] [] | - id-utils | [] [] [] [] [] | - impost | [] [] | - indent | [] [] [] [] [] [] [] [] [] [] | - iso_3166 | [] [] [] | - iso_3166_1 | [] [] [] [] [] [] [] | - iso_3166_2 | [] | - iso_3166_3 | [] | - iso_4217 | [] [] [] [] | - iso_639 | [] [] [] [] [] | - jpilot | [] [] | - jtag | [] | - jwhois | [] [] [] [] [] | - kbd | [] [] | - keytouch | [] | - keytouch-editor | [] | - keytouch-keyboa... | [] | - latrine | [] [] [] | - ld | [] [] | - leafpad | [] [] [] [] [] [] | - libc | [] [] [] [] [] | - libexif | [] | - libextractor | [] | - libgpewidget | [] [] [] [] [] | - libgpg-error | | - libgphoto2 | [] [] [] | - libgphoto2_port | [] [] | - libgsasl | [] [] | - libiconv | [] | - libidn | [] [] | - lifelines | () | - lilypond | [] | - lingoteach | [] [] [] | - lynx | [] [] [] | - m4 | [] [] [] [] | - mailutils | [] [] | - make | [] [] [] [] [] [] [] [] | - man-db | () | - minicom | [] [] [] [] | - mysecretdiary | [] [] [] | - nano | [] () [] [] [] [] | - nano_1_0 | [] [] [] [] [] | - opcodes | [] [] [] [] | - parted | [] [] [] [] | - pilot-qof | | - psmisc | [] [] [] | - pwdutils | | - python | | - qof | | - radius | [] [] | - recode | [] [] [] [] [] [] [] [] | - rpm | [] [] | - screem | | - scrollkeeper | [] [] [] | - sed | [] [] [] [] [] | - sh-utils | [] [] [] [] [] [] [] | - shared-mime-info | [] [] [] [] [] [] | - sharutils | [] [] [] [] [] [] [] [] | - shishi | | - silky | [] | - skencil | [] [] | - sketch | [] [] | - solfege | [] | - soundtracker | [] [] [] | - sp | [] | - stardict | [] | - system-tools-ba... | [] [] [] [] [] [] [] [] | - tar | [] [] [] [] [] [] | - texinfo | [] [] | - textutils | [] [] [] [] [] | - tin | [] () | - tp-robot | [] [] [] [] | - tuxpaint | [] [] | - unicode-han-tra... | | - unicode-transla... | [] [] | - util-linux | [] [] [] [] [] [] [] | - vorbis-tools | [] [] | - wastesedge | () | - wdiff | [] [] [] [] [] [] [] [] | - wget | [] [] [] [] [] [] [] [] | - xchat | [] [] [] [] [] [] [] [] | - xkeyboard-config | [] [] [] [] | - xpad | [] [] [] | - +--------------------------------------------------+ - es et eu fa fi fr ga gl gu he hi hr hu id is it - 89 21 16 2 41 119 61 14 1 8 1 6 61 30 0 53 - - ja ko ku ky lg lt lv mk mn ms mt nb ne nl nn no - +--------------------------------------------------+ - GNUnet | | - a2ps | () [] [] () | - aegis | () | - ant-phone | [] | - anubis | [] [] [] | - ap-utils | [] | - aspell | [] [] | - bash | [] | - batchelor | [] [] | - bfd | | - bibshelf | [] | - binutils | | - bison | [] [] [] | - bison-runtime | [] [] [] | - bluez-pin | [] [] [] | - cflow | | - clisp | [] | - console-tools | | - coreutils | [] | - cpio | | - cpplib | [] | - cryptonit | [] | - darkstat | [] [] | - dialog | [] [] | - diffutils | [] [] [] | - doodle | | - e2fsprogs | [] | - enscript | [] | - error | [] | - fetchmail | [] [] | - fileutils | [] [] | - findutils | [] | - flex | [] [] | - fslint | [] [] | - gas | | - gawk | [] [] | - gbiff | [] | - gcal | | - gcc | | - gettext-examples | [] [] | - gettext-runtime | [] [] [] | - gettext-tools | [] [] | - gimp-print | [] [] | - gip | [] [] | - gliv | [] | - glunarclock | [] [] | - gmult | [] [] | - gnubiff | | - gnucash | () () | - gnucash-glossary | [] | - gnuedu | | - gnulib | [] [] [] [] | - gnunet-gtk | | - gnutls | | - gpe-aerial | [] | - gpe-beam | [] | - gpe-calendar | [] | - gpe-clock | [] [] | - gpe-conf | [] [] | - gpe-contacts | [] | - gpe-edit | [] [] | - gpe-filemanager | [] | - gpe-go | [] [] | - gpe-login | [] [] | - gpe-ownerinfo | [] | - gpe-package | [] | - gpe-sketchbook | [] [] | - gpe-su | [] [] | - gpe-taskmanager | [] [] [] | - gpe-timesheet | [] | - gpe-today | [] | - gpe-todo | | - gphoto2 | [] [] | - gprof | | - gpsdrive | () () () | - gramadoir | () | - grep | [] [] [] | - gretl | | - gsasl | [] | - gss | | - gst-plugins | [] | - gst-plugins-base | | - gst-plugins-good | [] | - gstreamer | [] | - gtick | [] | - gtkam | [] | - gtkorphan | [] | - gtkspell | [] [] | - gutenprint | | - hello | [] [] [] [] [] [] [] [] | - id-utils | [] | - impost | | - indent | [] [] | - iso_3166 | [] | - iso_3166_1 | [] [] | - iso_3166_2 | [] | - iso_3166_3 | [] | - iso_4217 | [] [] [] | - iso_639 | [] [] | - jpilot | () () () | - jtag | | - jwhois | [] | - kbd | [] | - keytouch | [] | - keytouch-editor | | - keytouch-keyboa... | | - latrine | [] | - ld | | - leafpad | [] [] | - libc | [] [] [] [] [] | - libexif | | - libextractor | | - libgpewidget | [] | - libgpg-error | | - libgphoto2 | [] | - libgphoto2_port | [] | - libgsasl | [] | - libiconv | | - libidn | [] [] | - lifelines | [] | - lilypond | | - lingoteach | [] | - lynx | [] [] | - m4 | [] [] | - mailutils | | - make | [] [] [] | - man-db | () | - minicom | [] | - mysecretdiary | [] | - nano | [] [] [] | - nano_1_0 | [] [] [] | - opcodes | [] | - parted | [] [] | - pilot-qof | | - psmisc | [] [] [] | - pwdutils | | - python | | - qof | | - radius | | - recode | [] | - rpm | [] [] | - screem | [] | - scrollkeeper | [] [] [] [] | - sed | [] [] | - sh-utils | [] [] | - shared-mime-info | [] [] [] [] [] | - sharutils | [] [] | - shishi | | - silky | [] | - skencil | | - sketch | | - solfege | | - soundtracker | | - sp | () | - stardict | [] [] | - system-tools-ba... | [] [] [] [] | - tar | [] [] [] | - texinfo | [] [] [] | - textutils | [] [] [] | - tin | | - tp-robot | [] | - tuxpaint | [] | - unicode-han-tra... | | - unicode-transla... | | - util-linux | [] [] | - vorbis-tools | [] | - wastesedge | [] | - wdiff | [] [] | - wget | [] [] | - xchat | [] [] [] [] | - xkeyboard-config | [] | - xpad | [] [] [] | - +--------------------------------------------------+ - ja ko ku ky lg lt lv mk mn ms mt nb ne nl nn no - 40 24 2 1 1 3 1 2 3 21 0 15 1 101 5 3 - - nso or pa pl pt pt_BR rm ro ru rw sk sl sq sr sv ta - +------------------------------------------------------+ - GNUnet | | - a2ps | () [] [] [] [] [] [] | - aegis | () () | - ant-phone | [] [] | - anubis | [] [] [] | - ap-utils | () | - aspell | [] [] | - bash | [] [] [] | - batchelor | [] [] | - bfd | | - bibshelf | [] | - binutils | [] [] | - bison | [] [] [] [] [] | - bison-runtime | [] [] [] [] | - bluez-pin | [] [] [] [] [] [] [] [] [] | - cflow | [] | - clisp | [] | - console-tools | [] | - coreutils | [] [] [] [] | - cpio | [] [] [] | - cpplib | [] | - cryptonit | [] [] | - darkstat | [] [] [] [] [] [] | - dialog | [] [] [] [] [] [] [] [] [] | - diffutils | [] [] [] [] [] [] | - doodle | [] [] | - e2fsprogs | [] [] | - enscript | [] [] [] [] [] | - error | [] [] [] [] | - fetchmail | [] [] [] | - fileutils | [] [] [] [] [] | - findutils | [] [] [] [] [] [] | - flex | [] [] [] [] [] | - fslint | [] [] [] [] | - gas | | - gawk | [] [] [] [] | - gbiff | [] | - gcal | [] | - gcc | [] | - gettext-examples | [] [] [] [] [] [] [] [] | - gettext-runtime | [] [] [] [] [] [] [] [] | - gettext-tools | [] [] [] [] [] [] [] | - gimp-print | [] [] | - gip | [] [] [] [] | - gliv | [] [] [] [] | - glunarclock | [] [] [] [] [] [] | - gmult | [] [] [] [] | - gnubiff | () | - gnucash | () [] | - gnucash-glossary | [] [] [] | - gnuedu | | - gnulib | [] [] [] [] [] | - gnunet-gtk | [] | - gnutls | [] [] | - gpe-aerial | [] [] [] [] [] [] [] | - gpe-beam | [] [] [] [] [] [] [] | - gpe-calendar | [] [] [] [] [] [] [] [] | - gpe-clock | [] [] [] [] [] [] [] [] | - gpe-conf | [] [] [] [] [] [] [] | - gpe-contacts | [] [] [] [] [] | - gpe-edit | [] [] [] [] [] [] [] [] | - gpe-filemanager | [] [] | - gpe-go | [] [] [] [] [] [] | - gpe-login | [] [] [] [] [] [] [] [] | - gpe-ownerinfo | [] [] [] [] [] [] [] [] | - gpe-package | [] [] | - gpe-sketchbook | [] [] [] [] [] [] [] [] | - gpe-su | [] [] [] [] [] [] [] [] | - gpe-taskmanager | [] [] [] [] [] [] [] [] | - gpe-timesheet | [] [] [] [] [] [] [] [] | - gpe-today | [] [] [] [] [] [] [] [] | - gpe-todo | [] [] [] [] | - gphoto2 | [] [] [] [] [] | - gprof | [] [] [] | - gpsdrive | [] [] [] | - gramadoir | [] [] | - grep | [] [] [] [] [] [] [] [] | - gretl | [] | - gsasl | [] [] | - gss | [] [] [] | - gst-plugins | [] [] [] [] | - gst-plugins-base | [] | - gst-plugins-good | [] [] [] [] | - gstreamer | [] [] [] | - gtick | [] [] [] | - gtkam | [] [] [] [] | - gtkorphan | [] | - gtkspell | [] [] [] [] [] [] [] [] | - gutenprint | [] | - hello | [] [] [] [] [] [] [] [] | - id-utils | [] [] [] [] | - impost | [] | - indent | [] [] [] [] [] [] | - iso_3166 | [] [] [] [] [] [] | - iso_3166_1 | [] [] [] [] | - iso_3166_2 | | - iso_3166_3 | [] [] [] [] | - iso_4217 | [] [] [] [] | - iso_639 | [] [] [] [] | - jpilot | | - jtag | [] | - jwhois | [] [] [] [] | - kbd | [] [] [] | - keytouch | [] | - keytouch-editor | [] | - keytouch-keyboa... | [] | - latrine | [] [] | - ld | [] | - leafpad | [] [] [] [] [] [] | - libc | [] [] [] [] [] | - libexif | [] | - libextractor | [] [] | - libgpewidget | [] [] [] [] [] [] [] | - libgpg-error | [] [] | - libgphoto2 | [] | - libgphoto2_port | [] [] [] | - libgsasl | [] [] [] [] | - libiconv | | - libidn | [] [] () | - lifelines | [] [] | - lilypond | | - lingoteach | [] | - lynx | [] [] [] | - m4 | [] [] [] [] [] | - mailutils | [] [] [] [] | - make | [] [] [] [] | - man-db | [] [] | - minicom | [] [] [] [] [] | - mysecretdiary | [] [] [] [] | - nano | [] [] | - nano_1_0 | [] [] [] [] | - opcodes | [] [] | - parted | [] | - pilot-qof | [] | - psmisc | [] [] | - pwdutils | [] [] | - python | | - qof | [] | - radius | [] [] | - recode | [] [] [] [] [] [] [] | - rpm | [] [] [] [] | - screem | | - scrollkeeper | [] [] [] [] [] [] [] | - sed | [] [] [] [] [] [] [] [] [] | - sh-utils | [] [] [] | - shared-mime-info | [] [] [] [] [] | - sharutils | [] [] [] [] | - shishi | [] | - silky | [] | - skencil | [] [] [] | - sketch | [] [] [] | - solfege | [] | - soundtracker | [] [] | - sp | | - stardict | [] [] [] | - system-tools-ba... | [] [] [] [] [] [] [] [] [] | - tar | [] [] [] [] [] | - texinfo | [] [] [] [] | - textutils | [] [] [] | - tin | () | - tp-robot | [] | - tuxpaint | [] [] [] [] [] | - unicode-han-tra... | | - unicode-transla... | | - util-linux | [] [] [] [] | - vorbis-tools | [] [] | - wastesedge | | - wdiff | [] [] [] [] [] [] | - wget | [] [] [] [] | - xchat | [] [] [] [] [] [] [] | - xkeyboard-config | [] [] | - xpad | [] [] [] | - +------------------------------------------------------+ - nso or pa pl pt pt_BR rm ro ru rw sk sl sq sr sv ta - 0 2 3 58 31 53 5 76 72 5 42 48 12 51 130 2 - - tg th tk tr uk ven vi wa xh zh_CN zh_HK zh_TW zu - +---------------------------------------------------+ - GNUnet | [] | 2 - a2ps | [] [] [] | 19 - aegis | | 0 - ant-phone | [] [] | 6 - anubis | [] [] [] | 11 - ap-utils | () [] | 4 - aspell | [] [] [] | 14 - bash | [] | 11 - batchelor | [] [] | 9 - bfd | | 1 - bibshelf | [] | 7 - binutils | [] [] [] | 9 - bison | [] [] [] | 19 - bison-runtime | [] [] [] | 16 - bluez-pin | [] [] [] [] [] [] | 28 - cflow | [] [] | 4 - clisp | | 6 - console-tools | [] [] | 5 - coreutils | [] [] | 17 - cpio | [] [] [] | 9 - cpplib | [] [] [] [] | 11 - cryptonit | | 5 - darkstat | [] () () | 15 - dialog | [] [] [] [] [] | 30 - diffutils | [] [] [] [] | 28 - doodle | [] | 6 - e2fsprogs | [] [] | 10 - enscript | [] [] [] | 16 - error | [] [] [] [] | 18 - fetchmail | [] [] | 12 - fileutils | [] [] [] | 18 - findutils | [] [] [] | 17 - flex | [] [] | 15 - fslint | [] | 9 - gas | [] | 3 - gawk | [] [] | 15 - gbiff | [] | 5 - gcal | [] | 5 - gcc | [] [] [] | 6 - gettext-examples | [] [] [] [] [] [] | 26 - gettext-runtime | [] [] [] [] [] [] | 28 - gettext-tools | [] [] [] [] [] | 19 - gimp-print | [] [] | 12 - gip | [] [] | 12 - gliv | [] [] | 8 - glunarclock | [] [] [] | 15 - gmult | [] [] [] [] | 15 - gnubiff | [] | 1 - gnucash | () | 2 - gnucash-glossary | [] [] | 9 - gnuedu | [] | 2 - gnulib | [] [] [] [] [] | 28 - gnunet-gtk | | 1 - gnutls | | 2 - gpe-aerial | [] [] | 14 - gpe-beam | [] [] | 14 - gpe-calendar | [] [] [] [] | 19 - gpe-clock | [] [] [] [] | 20 - gpe-conf | [] [] | 14 - gpe-contacts | [] [] | 10 - gpe-edit | [] [] [] [] | 19 - gpe-filemanager | [] | 5 - gpe-go | [] [] | 14 - gpe-login | [] [] [] [] [] | 20 - gpe-ownerinfo | [] [] [] [] | 20 - gpe-package | [] | 5 - gpe-sketchbook | [] [] | 16 - gpe-su | [] [] [] | 19 - gpe-taskmanager | [] [] [] | 19 - gpe-timesheet | [] [] [] [] | 18 - gpe-today | [] [] [] [] [] | 20 - gpe-todo | [] | 6 - gphoto2 | [] [] [] [] | 20 - gprof | [] [] | 11 - gpsdrive | | 4 - gramadoir | [] | 7 - grep | [] [] [] [] | 33 - gretl | | 4 - gsasl | [] [] | 6 - gss | [] | 5 - gst-plugins | [] [] [] | 15 - gst-plugins-base | [] [] [] | 9 - gst-plugins-good | [] [] [] | 18 - gstreamer | [] [] [] | 17 - gtick | [] | 11 - gtkam | [] | 13 - gtkorphan | [] | 7 - gtkspell | [] [] [] [] [] [] | 26 - gutenprint | | 3 - hello | [] [] [] [] [] | 39 - id-utils | [] [] | 14 - impost | [] | 4 - indent | [] [] [] [] | 25 - iso_3166 | [] [] [] | 15 - iso_3166_1 | [] [] | 20 - iso_3166_2 | | 2 - iso_3166_3 | [] [] | 9 - iso_4217 | [] [] | 14 - iso_639 | [] | 14 - jpilot | [] [] [] [] | 7 - jtag | [] | 3 - jwhois | [] [] [] | 13 - kbd | [] [] | 12 - keytouch | [] | 4 - keytouch-editor | | 2 - keytouch-keyboa... | | 2 - latrine | [] [] | 8 - ld | [] [] [] [] | 8 - leafpad | [] [] [] [] | 23 - libc | [] [] [] | 23 - libexif | [] | 4 - libextractor | [] | 5 - libgpewidget | [] [] [] | 19 - libgpg-error | [] | 4 - libgphoto2 | [] | 8 - libgphoto2_port | [] [] [] | 11 - libgsasl | [] | 8 - libiconv | [] | 4 - libidn | [] [] | 10 - lifelines | | 4 - lilypond | | 2 - lingoteach | [] | 6 - lynx | [] [] [] | 15 - m4 | [] [] [] | 18 - mailutils | [] | 8 - make | [] [] [] | 20 - man-db | [] | 6 - minicom | [] | 14 - mysecretdiary | [] [] | 12 - nano | [] [] | 15 - nano_1_0 | [] [] [] | 18 - opcodes | [] [] | 10 - parted | [] [] [] | 10 - pilot-qof | [] | 3 - psmisc | [] | 10 - pwdutils | [] | 3 - python | | 0 - qof | [] | 2 - radius | [] | 6 - recode | [] [] [] | 25 - rpm | [] [] [] [] | 14 - screem | [] | 2 - scrollkeeper | [] [] [] [] | 26 - sed | [] [] [] | 22 - sh-utils | [] | 15 - shared-mime-info | [] [] [] [] | 23 - sharutils | [] [] [] | 23 - shishi | | 1 - silky | [] | 4 - skencil | [] | 7 - sketch | | 6 - solfege | | 2 - soundtracker | [] [] | 9 - sp | [] | 3 - stardict | [] [] [] [] | 11 - system-tools-ba... | [] [] [] [] [] [] [] | 37 - tar | [] [] [] [] | 19 - texinfo | [] [] [] | 15 - textutils | [] [] [] | 17 - tin | | 1 - tp-robot | [] [] [] | 10 - tuxpaint | [] [] [] | 16 - unicode-han-tra... | | 0 - unicode-transla... | | 2 - util-linux | [] [] [] | 20 - vorbis-tools | [] [] | 11 - wastesedge | | 1 - wdiff | [] [] | 22 - wget | [] [] [] | 19 - xchat | [] [] [] [] | 28 - xkeyboard-config | [] [] [] [] | 11 - xpad | [] [] [] | 14 - +---------------------------------------------------+ - 77 teams tg th tk tr uk ven vi wa xh zh_CN zh_HK zh_TW zu - 172 domains 0 1 1 78 39 0 135 13 1 50 3 54 0 2054 - - Some counters in the preceding matrix are higher than the number of -visible blocks let us expect. This is because a few extra PO files are -used for implementing regional variants of languages, or language -dialects. - - For a PO file in the matrix above to be effective, the package to -which it applies should also have been internationalized and -distributed as such by its maintainer. There might be an observable -lag between the mere existence a PO file and its wide availability in a -distribution. - - If July 2006 seems to be old, you may fetch a more recent copy of -this `ABOUT-NLS' file on most GNU archive sites. The most up-to-date -matrix with full percentage details can be found at -`http://www.iro.umontreal.ca/contrib/po/HTML/matrix.html'. - -1.6 Using `gettext' in new packages -=================================== - -If you are writing a freely available program and want to -internationalize it you are welcome to use GNU `gettext' in your -package. Of course you have to respect the GNU Library General Public -License which covers the use of the GNU `gettext' library. This means -in particular that even non-free programs can use `libintl' as a shared -library, whereas only free software can use `libintl' as a static -library or use modified versions of `libintl'. - - Once the sources are changed appropriately and the setup can handle -the use of `gettext' the only thing missing are the translations. The -Free Translation Project is also available for packages which are not -developed inside the GNU project. Therefore the information given above -applies also for every other Free Software Project. Contact -`translation@iro.umontreal.ca' to make the `.pot' files available to -the translation teams. - diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/AUTHORS b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/AUTHORS deleted file mode 100644 index 0a3ca6fd..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/AUTHORS +++ /dev/null @@ -1,8 +0,0 @@ -Authors of GNU Bison. - -Bison was written primarily by Robert Corbett. - -Richard Stallman made it Yacc-compatible. - -Wilfred Hansen of Carnegie Mellon University added multicharacter -string literals and other features. diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/COPYING b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/COPYING deleted file mode 100644 index 94a9ed02..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/COPYING +++ /dev/null @@ -1,674 +0,0 @@ - GNU GENERAL PUBLIC LICENSE - Version 3, 29 June 2007 - - Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. - - Preamble - - The GNU General Public License is a free, copyleft license for -software and other kinds of works. - - The licenses for most software and other practical works are designed -to take away your freedom to share and change the works. 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If not, see <http://www.gnu.org/licenses/>. - -Also add information on how to contact you by electronic and paper mail. - - If the program does terminal interaction, make it output a short -notice like this when it starts in an interactive mode: - - <program> Copyright (C) <year> <name of author> - This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. - This is free software, and you are welcome to redistribute it - under certain conditions; type `show c' for details. - -The hypothetical commands `show w' and `show c' should show the appropriate -parts of the General Public License. Of course, your program's commands -might be different; for a GUI interface, you would use an "about box". - - You should also get your employer (if you work as a programmer) or school, -if any, to sign a "copyright disclaimer" for the program, if necessary. -For more information on this, and how to apply and follow the GNU GPL, see -<http://www.gnu.org/licenses/>. - - The GNU General Public License does not permit incorporating your program -into proprietary programs. If your program is a subroutine library, you -may consider it more useful to permit linking proprietary applications with -the library. If this is what you want to do, use the GNU Lesser General -Public License instead of this License. But first, please read -<http://www.gnu.org/philosophy/why-not-lgpl.html>. diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/ChangeLog b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/ChangeLog deleted file mode 100644 index f28a8478..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/ChangeLog +++ /dev/null @@ -1,21115 +0,0 @@ -2008-12-11 Joel E. Denny <jdenny@ces.clemson.edu> - - Version 2.4.1. - * NEWS: Set version and date. - * lib/Makefile.am: Update copyright year. - * tests/atlocal.in: Update copyright year. - -2008-12-11 Joel E. Denny <jdenny@ces.clemson.edu> - - Semicolon feature removal is not about future language support. - * NEWS: The semicolon feature is no longer active for newer languages, - so don't claim that it causes trouble for them. - -2008-12-11 Joel E. Denny <jdenny@ces.clemson.edu> - - * gnulib: Update submodule to HEAD. - -2008-12-09 Akim Demaille <demaille@gostai.com> - - Update data/README. - * data/README: Document glr.cc, lalr1.java, m4sugar and xslt. - -2008-12-05 Eric Blake <ebb9@byu.net> - - Build testsuite with newer autoconf. - * tests/output.at (m4_expand): Don't override in newer autoconf, - where the underlying implementation changed. - * tests/cxx-type.at (_AT_RESOLVED_GLR_OUTPUT) - (_AT_RESOLVED_GLR_OUTPUT_WITH_LOC, _AT_AMBIG_GLR_OUTPUT) - (_AT_AMBIG_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR) - (_AT_VERBOSE_GLR_STDERR): Expand to double-quoted strings, - since some of them contain unbalanced ')'. - -2008-11-19 Joel E. Denny <jdenny@ces.clemson.edu> - - * NEWS: Clarify a little. - -2008-11-19 Joel E. Denny <jdenny@ces.clemson.edu> - - * NEWS: Update for recent changes. - -2008-11-18 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix unexpanded macros in GLR defines file. - Reported by Csaba Raduly at - <http://lists.gnu.org/archive/html/bug-bison/2008-11/msg00048.html>. - * THANKS (Csaba Raduly): Add. - * data/glr.c: Fix overquoting on b4_prefix for yylval and yylloc. - * tests/calc.at (_AT_DATA_CALC_Y): If %defines is specified, generate - lexer in a separate module that includes the defines file. - (AT_CHECK_CALC): Use AT_FULL_COMPILE and request compilation of lexer - source. - * tests/local.at (_AT_BISON_OPTION_PUSHDEFS): Push AT_DEFINES_IF. - Adjust AT_LOC and AT_VAL to use AT_NAME_PREFIX. - (AT_BISON_OPTION_POPDEFS): Pop AT_DEFINES_IF. - (AT_DATA_SOURCE_PROLOGUE): New. - (AT_DATA_GRAMMAR_PROLOGUE): Use AT_DATA_SOURCE_PROLOGUE. - (AT_DATA_SOURCE): New. - (AT_FULL_COMPILE): New, copied from master branch and extended to - support an additional source file. - -2008-11-17 Joel E. Denny <jdenny@ces.clemson.edu> - - Don't let maintainer-*-check targets force a version update. - * cfg.mk (_is-dist-target): Implement. maintainer-check* was already - handled. - -2008-11-17 Di-an Jan <dianj@freeshell.org> - - * doc/bison.texinfo: Synchronize ``Detail Node Listing''. - Align menus. Adjust word wrapping. Use node names for menu names. - (Examples): Don't abbreviate node names. - (LocalWords): Remove abbreviations. - (Copying): Make description a sentence. - (Java Action Features): Remove period to match the rest of menu. - -2008-11-11 Paolo Bonzini <bonzini@gnu.org> - - * bootstrap.conf: Replace m4/warning.m4 with warnings module. - * configure.ac: Adjust usage. - * lib/Makefile.am: Replace $(WARNING_CFLAGS) with $(WARN_CFLAGS). - * src/Makefile.am: Replace $(WARNING_CFLAGS) with $(WARN_CFLAGS). - * tests/atlocal.in: Replace $(WARNING_*FLAGS) with $(WARN_*FLAGS). - -2008-11-07 Joel E. Denny <jdenny@ces.clemson.edu> - - Don't add a semicolon to actions for %skeleton or %language. - It breaks Java test cases as reported by Akim Demaille. - * src/scan-code.l: Implement. - -2008-11-07 Joel E. Denny <jdenny@ces.clemson.edu> - - Clean up %skeleton and %language priority implementation. - * src/getargs.c (skeleton_prio): Use default_prio rather than 2, and - remove static qualifier because others will soon need to see it. - (language_prio): Likewise. - (getargs): Use command_line_prio rather than 0. - * src/getargs.h (command_line_prio, grammar_prio, default_prio): New - enum fields. - (skeleton_prio): Extern it. - (language_prio): Extern it. - * src/parse-gram.y: Use grammar_prio rather than 1. - -2008-11-04 Akim Demaille <demaille@gostai.com> - - * NEWS: Mention the trailing semicolon in action. - -2008-11-04 Akim Demaille <demaille@gostai.com> - - Reformat NEWS. - * NEWS: Use more outline-mode markup. - Suggested by Jim Meyering. - -2008-11-04 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix user actions without a trailing semicolon. - Reported by Sergei Steshenko at - <http://lists.gnu.org/archive/html/bug-bison/2008-11/msg00001.html>. - * THANKS (Sergei Steshenko): Add. - * src/scan-code.l (SC_RULE_ACTION): Fix it. - * tests/regression.at (Fix user actions without a trailing semicolon): - New test case. - -2008-11-02 Joel E. Denny <jdenny@ces.clemson.edu> - - Initiate further development. - * NEWS: Create an empty section for new entries. - * gnulib: Update submodule to HEAD. - -2008-11-02 Joel E. Denny <jdenny@ces.clemson.edu> - - * NEWS: Version 2.4. - -2008-11-02 Joel E. Denny <jdenny@ces.clemson.edu> - - Prepare for next release. - * NEWS: Briefly mention changes since 2.3b. - * README: Say GNU m4 1.4.6, which we've been requiring in release - announcements already, not 1.4.3, which breaks the build. - -2008-11-02 Joel E. Denny <jdenny@ces.clemson.edu> - - Say %language is experimental. - We're thinking of extending it's effect on output file naming. See the - thread at - <http://lists.gnu.org/archive/html/bison-patches/2008-10/msg00003.html>. - * NEWS: Say it's experimental. - * doc/bison.texinfo (Decl Summary): Say it's experimental, and so don't - recommend it over %skeleton for now. - (Bison Options): Likewise. - (C++ Bison Interface): Use %skeleton not %language. - (Calc++ Parser): Use %skeleton not %language. - * src/getargs.c (usage): Say it's experimental. - -2008-11-01 Di-an Jan <dianj@freeshell.org> - Paolo Bonzini <bonzini@gnu.org> - - Support all Java parser class modifiers. - * data/java.m4 (b4_percent_define_get3): New. - (b4_final_if, b4_strictfp_if): New. - * data/lalr1.java (final, strictfp, extends, implements): Support. - * doc/bison.texinfo (final, strictfp, extends, implements): Add - documentation. - * tests/java.at (AT_CHECK_JAVA_MINIMAL): New. - (AT_CHECK_JAVA_MINIMAL_W_LEXER): New. - (AT_CHECK_JAVA_GREP): New. - (Java parser class modifiers): New test. - (Java parser class extends and implements): New test. - - Model exception propagation better with throws and lex_throws. - * data/java.m4 (b4_list2): New. - (throws): Change default. - * data/lalr1.java (yyaction): Add throws. - (parse): Add lex_throws in addition to throws. - * doc/bison.texinfo (throws, lex_throws): Add documentation. - * tests/java.at (Java throws specifications): New test. - - Improve documentation for Java parsers. - * doc/bison.texinfo (Java Parsers): Add subsections. - Don't quote first argument of %define. - (Java Bison Interface): Document output files. Move documentation - of parser class and merge into Java Parser Interface. Document - features that error out. Document directives with no effect. - Move note about Javadoc higher. - (Java Semantic Values): Explicitly mention stype. - Document that generic types cannot be used. - (Java Location Values): Use @deftypeivar. Document constructors. - Correct return value for toString. - (Java Parser Interface): List undocumented constants/fields. - Move documentation of fields added by %parse-param closer to list - of members. Document that token names are added as fields. - Document constructors accurately. Remove error method. - (Java Scanner Interface): Move note on %pure-parser to Java Bison - Interface. Describe %code lexer and yylex accutately. - Remove documentation that does not match the code. - (Java Action Features): New. - (Java Differences): Add reference. Add item on semantic values. - Add note about @{ ... @}. Clarify %% epilogue placement. - (Java Declarations Summary): New. - - Fix Java skeleton. - * data/java.m4 (b4_prefix): Correct quoting for m4_define_default. - (b4_remove_comma): Quote test argument. - (b4_identification): Remove "bison" field. - * tests/java.at (Java parser class and package names): New test. - (Java %parse-param and %lex-param): New test. - (Java stype, position_class and location_class): New test. - -2008-10-31 Di-an Jan <dianj@freeshell.org> - - * data/lalr1.jave: Update copyright years. - (YYParser): Correct name of "generated from" file in Javadoc: - use b4_file_name instead of @ofile@. - (Location constructor): Correct Javadoc parameter name. - (yylloc): Add missing opening m4 quote after b4_location_if. - This removes a stray [ in the Javadoc of Lexer.getStartPos. - (Lexer.yyerror): Fix incorrect m4 and Javadoc. - (YYParser constructor): Correct Javadoc parameter name. - -2008-10-30 Joel E. Denny <jdenny@ces.clemson.edu> - - Always put auxiliary code files in the same dir as other output files. - * src/files.c (compute_file_name_parts): When the user specifies - --output but not --file-prefix, extract the directory prefix from the - file prefix not from the grammar file name. This affects the location - of files like location.hh generated by the C++ skeleton. The includes - in the other output files require this fix. - * tests/output.at (AT_CHECK_OUTPUT): Automatically create directories - for expected output files. - (Output files): Add a test for the above. - -2008-10-29 Joel E. Denny <jdenny@ces.clemson.edu> - - * gnulib: Update submodule to HEAD. - -2008-10-28 Joel E. Denny <jdenny@ces.clemson.edu> - - Update copyright year. - * src/files.c: Here. - -2008-10-28 Di-an Jan <dianj@freeshell.org> (tiny change) - - Don't overwrite the input file. - * src/files.c (output_file_name_check): Fatal error if using input file - for output. - * tests/output.at: (AT_CHECK_CONFLICTING_OUTPUT): Add return status - argument. - (Conflicting output files): Add test. - -2008-10-28 Akim Demaille <demaille@gostai.com> - - Space changes. - * data/lalr1.cc: Formatting changes. - -2008-10-28 Akim Demaille <demaille@gostai.com> - - Don't define debugging functions when !YYDEBUG. - * data/lalr1.cc (debug_stream, set_debug_stream) - (debug_level_type, debug_level, set_debug_level): Don't - declare them when YYDEBUG is not defined. - The implementation are already YYDEBUG-aware. - -2008-10-28 Akim Demaille <demaille@gostai.com> - - Prefer "continue" for empty loop bodies. - * etc/bench.pl.in: Use "continue" instead of {}. - -2008-10-28 Akim Demaille <demaille@gostai.com> - - Space and comments changes. - * data/c++.m4, data/glr.c, data/lalr1.cc: Copyright year changes. - * data/c.m4, data/lalr1.cc: Space changes. - -2008-10-28 Akim Demaille <demaille@gostai.com> - - Make gnulib a submodule. - * gnulib: New. - * .gitmodules (gnulib): New. - -2008-10-18 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix yyerror_range for user-defined location type in C++. Reported by - Georg Sauthoff at - <http://lists.gnu.org/archive/html/bug-bison/2008-08/msg00008.html>. - * data/lalr1.cc (parse): Change type of yyerror_range to location_type. - * THANKS (Georg Sauthoff): Add. - -2008-10-18 Joel E. Denny <jdenny@ces.clemson.edu> - - Update several administrative files mainly to facilitate releasing. - * HACKING (Administrivia): Make the git-merge-changelog notes more - helpful. - (Test suite): Don't say lalr1.cc is not exercised in the test suite. - (Release Procedure): Update for git and add numerous details that were - previously missing. - * Makefile.am (EXTRA_DIST): Remove Makefile.cfg and Makefile.maint. - * maint.mk (announcement): Don't list bison as a bootstrap tool so - that announcements don't claim we bootstrapped with whatever bison - happened to be in PATH. Add flex as a bootstrap tool. - * Makefile.maint: Remove, previously replaced by maint.mk. - * Makefile.cfg: Remove, and migrate settings to... - * cfg.mk: ... here for the sake of `make announcement'. - * bootstrap.conf (gnulib_modules): Add announce-gen. - * README: Say GNU Bison instead of just Bison. Suggested by Karl - Berry. - -2008-10-08 Di-an Jan <dianj@freeshell.org> (tiny change) - - Small but important bugfixes for the Java skeleton. - * data/lalr1.java (yyerror): Change Location to b4_location_type. - (yy_symbol_print): Call toString on yyvaluep. - -2008-08-29 Akim Demaille <demaille@gostai.com> - - Clarify UPDATED use. - * doc/bison.texinfo: It refers to the last edition of this file, - not to the release date of Bison. - Reported by Joel E. Denny. - -2008-08-29 Akim Demaille <demaille@gostai.com> - - * README: Update FAQ pointer. - Reported by Joel E. Denny. - -2008-08-27 Eric Blake <ebb9@byu.net> - - Resync m4sugar from autoconf. - * data/m4sugar/m4sugar.m4 (m4_defn, m4_popdef, m4_undefine) - (m4_init): Adjust to latest m4.git changes. - (m4_mapall_sep, _m4_list_cmp, m4_version_compare): Reduce side - effects. - * data/m4sugar/foreach.m4 (_m4_shiftn): Fix off-by-one bug. - (_m4_list_cmp): Reduce side effects. - -2008-08-27 Akim Demaille <demaille@gostai.com> - - Check yyerrok in calc.at. - * tests/calc.at (calc.y): Use yyerrok on "( error )". - (AT_CHECK_CALC): Add a check that ensures that yyerrok works as - expected. - -2008-08-27 Akim Demaille <demaille@gostai.com> - - Support yyerrok in lalr1.cc. - YYBACKUP is still to import back into lalr1.cc. - * data/lalr1.cc (yyerrork, yyclearin, YYRECOVERING): Define. - -2008-08-26 Joel E. Denny <jdenny@ces.clemson.edu> - - For maintainer-check*, don't recompile for a $(VERSION) update. - * cfg.mk: New file. - (_is-dist-target): Override the one in GNUmakefile. - * Makefile.am (EXTRA_DIST): Add cfg.mk. - -2008-08-26 Joel E. Denny <jdenny@ces.clemson.edu> - - Update for recent change to gnulib. - * src/parse-gram.y: Don't include strverscmp.h. It comes from - string.h now. - -2008-08-15 Eric Blake <ebb9@byu.net> - - Remaining m4sugar merge from autoconf. - * data/m4sugar/m4sugar.m4: Copy entire file from autoconf. - * data/m4sugar/foreach.m4: New file, copied from autoconf. - * data/Makefile.am (dist_m4sugar_DATA): Distribute it. - * src/output.c (output_skeleton): Tell m4 how to find it. - - Partial m4sugar merge from autoconf: m4_map. - * data/m4sugar/m4sugar.m4 (m4_fst): Delete. - (m4_map, m4_map_sep, _m4_map): Rewrite more efficiently. - (m4_apply, _m4_apply, m4_mapall, m4_mapall_sep): New macros. - * data/java.m4 (b4_token_enums): Use more efficient short-circuit - for empty list. - * data/c.m4 (b4_token_defines, b4_token_enums, b4_c_ansi_formals): - Likewise. - (b4_parse_param_for): Avoid m4_fst, now that autoconf no longer - declares it. - -2008-08-07 Joel E. Denny <jdenny@ces.clemson.edu> - - Keep .version and PACKAGE_VERSION in sync. - * Makefile.am ($(top_srcdir)/.version): Declare configure as a - dependency, and add comments justifying this in more detail. Discussed - starting at - <http://lists.gnu.org/archive/html/bison-patches/2008-07/msg00022.html>. - -2008-08-06 Eric Blake <ebb9@byu.net> - - Partial m4sugar merge from autoconf: m4_shiftn. - * data/m4sugar/m4sugar.m4 (m4_shiftn): Faster implementation. - (m4_shift2, m4_shift3): New macros. - (m4_case, m4_bmatch, m4_bpatsubsts, m4_join): Adjust clients. - * data/c.m4 (b4_c_function_def, b4_c_ansi_function_def) - (b4_c_ansi_function_decl, b4_c_function_call): Likewise. - * data/java.m4 (b4_remove_comma): Likewise. - - Partial m4sugar merge from autoconf: m4_wrap vs. m4 1.6. - * data/m4sugar/m4sugar.m4 (m4_unquote, m4_wrap_lifo): New macros. - (m4_wrap): Guarantee FIFO order, in spite of m4 1.6. - (m4_init): Consolidate wrapped text into single m4_wrap. - * data/bison.m4 (b4_check_user_names_wrap): Stick with LIFO order - in wrapped text. - -2008-08-05 Eric Blake <ebb9@byu.net> - - Partial m4sugar merge from autoconf: builtins, version.m4. - * data/m4sugar/m4sugar.m4 (changeword): Nuke. - (m4_prepend): Remove, as it is unused and inherently quadratic, - whereas m4_append is linear in newer m4. - (m4_mkstemp): New builtin. - (m4_symbols): Make rename conditional. - (m4_version_prereq): Ensure fatal error if used in bison, which - intentionally lacks version.m4. - - Fix comments in m4sugar. - * data/m4sugar/m4sugar.m4: Comment changes, borrowed from autoconf. - -2008-08-02 Joel E. Denny <jdenny@ces.clemson.edu> - - Update for recent .gitignore fix in Gnulib. - * bootstrap: Back out 2008-07-18 hack now that gnulib-tool creates - anchored .gitignore entries. - -2008-08-02 Joel E. Denny <jdenny@ces.clemson.edu> - - Set gnu or gnits strictness. - * configure.ac (AM_INIT_AUTOMAKE): Set gnu strictness during - development and gnits strictness for releases. Based on Eric Blake's - suggestion at - <http://lists.gnu.org/archive/html/bug-bison/2008-07/msg00019.html>. - -2008-07-31 Paolo Bonzini <bonzini@gnu.org> - - * NEWS: Clarify documentation of %language. - -2008-07-31 Paolo Bonzini <bonzini@gnu.org> - - Support usage of git-merge-changelog. - * .gitattributes: New. - * HACKING: Document usage of git-merge-changelog. - * bootstrap: Install git-merge-changelog entries in .git/config - if appropriate. - -2008-07-27 Joel E. Denny <jdenny@ces.clemson.edu> - - Remove remaining dependence on CVS Id keyword. - * ChangeLog: For the sake of people still using CVS, don't use dollars - when mentioning Id. - * data/xslt/bison.xsl: Remove Id from header comments, where it was - unusual anyway. - * data/xslt/xml2dot.xsl: Likewise. - * data/xslt/xml2text.xsl: Likewise. - * data/xslt/xml2xhtml.xsl: Likewise. - * doc/Doxyfile.in (PROJECT_NUMBER): Don't use ID. - * doc/Makefile.am (neutralize): Remove, no longer needed. - (.x.1): Don't use neutralize. - (edit): Don't substitute for ID. - (Doxyfile): Don't define Id, and thus don't depend on ChangeLog. - -2008-07-27 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix dependence on computed configure variables. - * doc/Makefile.am (common_dep): Depend on $(top_srcdir)/configure not - $(top_srcdir)/configure.ac so that changes to computed variables, such - as PACKAGE_VERSION, are seen. - * tests/Makefile.am ($(srcdir)/package.m4): Likewise. - -2008-07-20 Joel E. Denny <jdenny@ces.clemson.edu> - - Update copyright dates for recent changes. - * Makefile.am: Here. - * src/Makefile.am: Here. - * src/reduce.c: Here. - * tests/reduce.at: Here. - -2008-07-18 Joel E. Denny <jdenny@ces.clemson.edu> - - Use git-version-gen for version names between releases. - * .cvsignore (.tarball-version, GNUmakefile, *~): Add. - * .gitignore (/.tarball-version, /GNUmakefile, /*~): Add. - * .prev-version: New. - * .version.in: Remove. - * ChangeLog: Remove the Id previously used for capturing the CVS - revision. - * GNUmakefile: Remove, now copied from Gnulib. - * Makefile.am: Add code suggested by comments in - build-aux/git-version-gen. - (EXTRA_DIST): Remove GNUmakefile, handled by Gnulib. Add maint.mk, - .prev-version, and .version. - * NEWS (2.3b+): Rename to... - (?.?): ... this because we're dropping the "+" version naming scheme, - but, in general, we still can't be sure of our next release name. - * bootstrap: Add a quick hack to remove from .gitignore the - GNUmakefile entry that gnulib adds. We already have a /GNUmakefile - entry. This should really be fixed in gnulib instead. - * bootstrap.conf (gnulib_modules): Add gnumakefile. - * configure.ac (AC_INIT): Set version name by invoking - build-aux/git-version-gen. - (AC_CONFIG_FILES): Remove .version, now generated by - build-aux/git-version-gen. - * maint.mk: New, copied from coreutils. - * doc/.cvsignore (bison.1): Add. - * doc/.gitignore (/bison.1): Add. - * doc/bison.1: Remove, generated. - * src/.cvsignore (revision.c): Remove. - * src/.gitignore (/revision.c): Remove. - * src/Makefile.am (bison_SOURCES): Remove revision.c and revision.h. - (BUILT_SOURCES): Remove revision.c. - (revision.c): Remove. - * src/getargs.c (version): Don't print revision after the VERSION. - * src/revision.h: Remove. - -2008-07-16 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix untranslatable composition of sentences. Reported by Goran - Uddeborg at - <http://lists.gnu.org/archive/html/bug-bison/2008-06/msg00000.html>. - * THANKS (Goran Uddeborg): Add. - * src/reduce.c (reduce_print): Report the number of nonterminals and - rules useless in the grammar in separate sentences. - * tests/reduce.at (Useless Rules): Update output. - (Reduced Automaton): Likewise. - (Underivable Rules): Likewise. - (Empty Language): Likewise. - -2008-07-15 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix some .gitignore and .cvsignore problems. - * bootstrap (insert_sorted_if_absent): Replace all uses with... - (insert_vc_ignore): ... this new function, which prepends `/' to all - .gitignore entries before passing them to insert_sorted_if_absent. - * bootstrap.conf (vc_ignore): Set to '.cvsignore .gitignore' so that - .cvsignore files are maintained even though Bison developers run - bootstrap while using Git. - * .cvsignore (*.patch *.log log patches applied): Remove, apparently - unneeded by Bison. - (gnulib): Add. - * .gitignore (/*.patch *.log log patches applied): Remove, broken and - unneeded. Reported by Eric Blake. - * lib/.gitignore (/*~): Add. - * po/.cvsignore, runtime-po/.cvsignore: Sync with .gitignore. - * examples/calc++/.gitignore (/calc++.exe): Add. Reported by Eric - Blake. - * src/.gitignore (/bison.exe): Add. Reported by Eric Blake. - -2008-07-15 Joel E. Denny <jdenny@ces.clemson.edu> - - Improve forward-compatibility with GNU M4. Reported by Eric Blake at - <http://lists.gnu.org/archive/html/bug-bison/2008-07/msg00000.html>. - * bootstrap.conf (gnulib_modules): Add unsetenv. - * lib/.gitignore, lib/.cvsignore (/unsetenv.c): Add. - * m4/.gitignore, m4/.cvsignore (/environ.m4): Add. - (/setenv.m4): Add. - * src/output.c (output_skeleton): For the m4 invocation, pass -dV as - the first argument because it may become position-dependent, and unset - POSIXLY_CORRECT so Bison's skeletons have access to GNU M4 extensions. - Add comments explaining these issues in more detail. - -2008-07-14 Joel E. Denny <jdenny@ces.clemson.edu> - - Add .gitignore everywhere based on .cvsignore. - * .gitignore: New. - * build-aux/.gitignore: New. - * data/.gitignore: New. - * doc/.gitignore: New. - * etc/.gitignore: New. - * examples/.gitignore: New. - * examples/calc++/.gitignore: New. - * lib/.gitignore: New. - * m4/.gitignore: New. - * po/.gitignore: New. - * runtime-po/.gitignore: New. - * src/.gitignore: New. - * tests/.gitignore: New. - -2008-05-27 Joel E. Denny <jdenny@ces.clemson.edu> - - * NEWS (2.3b+): New section, empty for now. - * configure.ac (AC_INIT): 2.3b -> 2.3b+. - -2008-05-27 Joel E. Denny <jdenny@ces.clemson.edu> - - * NEWS (2.3b): Update release date since there has been a delay in - getting the announcements and tarballs out. - -2008-05-23 Joel E. Denny <jdenny@ces.clemson.edu> - - * NEWS: Version 2.3b. - * configure.ac (AC_INIT): Likewise. - (PACKAGE_COPYRIGHT_YEAR): Update to 2008. - -2008-05-23 Joel E. Denny <jdenny@ces.clemson.edu> - - * HACKING: Don't say don't mention HACKING in the ChangeLog. We've - been doing it for years. - (Test suite): Mention maintainer-push-check and maintainer-xml-check. - (Release Procedure): Add FIXME about make alpha being unmaintained. - -2008-05-13 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/yacc.c: Reformat m4 a little for readability. - * src/lalr.c (build_relations): Correct comment. - -2008-05-12 Juan Manuel Guerrero <juan.guerrero@gmx.de> - - DJGPP specific issue. - * djgpp/config.sed: Fixes required to run configure scripts generated - by autoconf 2.62. - -2008-05-07 Joel E. Denny <jdenny@ces.clemson.edu> - - * HACKING (Release Procedure): translation@iro.umontreal.ca is now - coordinator@translationproject.org. - -2008-05-06 Joel E. Denny <jdenny@ces.clemson.edu> - - * THANKS: Add Eric Blake. - -2008-04-23 Eric Blake <ebb9@byu.net> - - Revert prior patch, by working around autoconf regression. - * tests/output.at (m4_expand): Add workaround for autoconf 2.62. - ("Output file name: ("): Uncomment test. - ("Output file name: )"): Likewise. - Based on an idea from Noah Misch. - -2008-04-21 Joel E. Denny <jdenny@ces.clemson.edu> - - Work-around an Autoconf 2.62 AT_SETUP bug that was not present in - 2.61. Reported by Juan Manuel Guerrero at - <http://lists.gnu.org/archive/html/bug-bison/2008-04/msg00011.html>. - * tests/output.at ("Output file name: ("): Comment out test case for - now. - ("Output file name: )"): Likewise. - -2008-04-21 Joel E. Denny <jdenny@ces.clemson.edu> - - * GNUmakefile: Update git-version-gen invocation so make dist - succeeds. - -2008-04-21 Joel E. Denny <jdenny@ces.clemson.edu> - - Update to the current gnulib CVS repository, and fix trigraph handling - in Bison. - * bootstrap: Update gnulib CVS repository URL. - (symlink_to_dir): Encapsulate the code that guarantees the destination - directory exists into... - (check_dst_dir): ... this new function, and... - (cp_mark_as_generated): ... reuse it here so that bootstrap doesn't - fail when copying files into lib/uniwidth/. - * src/output.c (prepare_symbols): When writing yytname muscles, where - symbol names will be encoded in C-string literals, tell quotearg to - escape trigraphs. This used to be the default in gnulib. - * tests/regression.at (Token definitions): Because of the change in - gnulib's quotearg behavior, string_as_id in parse-gram.y no longer - escapes trigraphs in symbol names. Thus, yytname no longer has - trigraphs unnecessarily doubly escaped. Update test case output. - Extend test case to be sure Bison's own error messages will no longer - have trigraphs in symbol names unnecessarily escaped once. - -2008-04-20 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix make dist infinite loop reported by Juan Manuel Guerrero at - <http://lists.gnu.org/archive/html/bug-bison/2008-01/msg00009.html>. - * .cvsignore: Add .version. - * .version.in: New. - * bootstrap.conf (gnulib_modules): Add git-version-gen. - * configure.ac (AC_CONFIG_FILES): Add .version. - * build-aux/.cvsignore: Add git-version-gen. - -2008-03-08 Joel E. Denny <jdenny@ces.clemson.edu> - - * NEWS (2.3a+): Mention that -g now takes an argument. - * doc/bison.texinfo (Bison Options): Reword -W entry a little for - consistency. Update the -g and -x entries now that they take - arguments. Use brackets to indicate optional arguments. - * src/getargs.c (usage): Explain the relationship between arguments of - long and short options more completely. Document --defines and -d - separately since the former takes an argument but, for POSIX Yacc, the - latter does not. - (short_options): Let -W take an optional argument like --warnings. - (getargs): Sort cases. - -2008-02-28 Akim Demaille <demaille@gostai.com> - - * doc/bison.texinfo: Fix a few typos. - -2008-02-28 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Bison Options): Document -W. - Based on Joel E. Denny's NEWS entry, and Automake's documentation. - -2008-02-28 Akim Demaille <akim@epita.fr> - - * src/getargs.c (short_options): Split and sort for readability. - -g and -x take optional arguments, just like their long options. - * build-aux/cross-options.pl: Use /x to make the regexp easier to - understand. - Fix the handling of $opt which resulted in all the argument to be - considered as optional. - -2008-02-22 Joel E. Denny <jdenny@ces.clemson.edu> - - * NEWS (2.3a+): Don't say %language is experimental. Mention Java and - say its interface is experimental. - * doc/bison.texinfo (Decl Summary): In the %language entry, mention - Java. - (Bison Options): In the -L and --language entry, mention Java. - (Java Bison Interface): Say the interface is experimental. - * src/getargs.c (usage): Mention -L and --language. - - * NEWS (2.3a+): Say the push parsing interface is experimental. - * doc/bison.texinfo (Push Decl): Likewise. - (Decl Summary): Likewise in the "%define api.push_pull" entry. - (Push Parser Function): Likewise. - (Pull Parser Function): Likewise. - (Parser Create Function): Likewise. - (Parser Delete Function): Likewise. - (Table of Symbols): Likewise in the yypstate_delete, yypstate_new, - yypull_parse, and yypush_parse entries. - - * NEWS (2.3a+): Mention XML support, and say the schema is - experimental. - * doc/bison.texinfo (Bison Options): Mention -x and --xml. - * src/getargs.c (usage): Say the XML schema is experimental. - - * NEWS (2.3a+): Say option instead of flag. - -2008-02-21 Wojciech Polak <polak@gnu.org> - - * data/xslt/xml2xhtml.xsl (xsl:template match="/"): Change footer - text. - -2008-02-20 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix impure push parser compile error reported by Bob Rossi at - <http://lists.gnu.org/archive/html/help-bison/2008-02/msg00023.html>. - * data/yacc.c: Clean up whitespace in the output a little. - (yypstate_allocated): Define for impure push parsers regardless of - whether the pull interface is also requested. - * tests/push.at (Push Parsing: Multiple impure instances): Extend to - check impure push parsers without the pull interface. - - * data/yacc.c (yypstate_new): Don't try to invoke yyerror since - yyerror takes arguments specified by %parse-param while yypstate_new - does not. - * doc/bison.texinfo (Parser Create Function): Document that - yypstate_new returns 0 for multiple impure parser instances. - * tests/push.at (Push Parsing: Multiple impure instances): Update - expected stderr output. - -2008-02-19 Joel E. Denny <jdenny@ces.clemson.edu> - - * runtime-po/POTFILES.in (push.c): Remove. - -2008-02-17 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/Makefile.am (dist_pkgdata_DATA): Remove push.c. - * data/push.c: Rename to... - * data/yacc.c: ... this, overwriting it. - * etc/bench.pl.in (bench_grammar): `%pure-parser'-> `%define api.pure'. - `%push-pull-parser' -> `%define api.push_pull "both"'. - Remove old yacc.c tests, and update push.c tests to yacc.c. - -2008-02-17 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/bison.m4 (b4_percent_code_get): Output %code block comments like - `"%code top" blocks' instead of `%code "top" blocks'. - * data/push.c: Import yacc.c changes from 2008-01-09 and 2007-08-03. - Clean up whitespace in the output a little. - -2008-02-16 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix documentation problems reported by Tim Josling at - <http://lists.gnu.org/archive/html/bug-bison/2008-01/msg00013.html>. - * NEWS (2.3a+): Mention removal of --no-parser, -n, and %no-parser. - * doc/bison.texinfo (Token Decl): Token numbers are *nonnegative* - integers. Explain the effect of literal string aliases on error - messages. Copy token 0 documentation from the C++ skeleton - documentation. - -2008-02-16 Joel E. Denny <jdenny@ces.clemson.edu> - - Accept a token number in a %left, %right, or %nonassoc for POSIX - conformance. Reported by Tim Josling at - <http://lists.gnu.org/archive/html/bug-bison/2008-01/msg00010.html>. - * NEWS (2.3a+): Mention. - * doc/bison.texinfo (Precedence Decl): Describe how literal strings - and code numbers are treated by precedence declarations. - * src/parse-gram.y (precedence_declaration): Use symbols.prec instead - of symbols.1. - (symbols.prec): New, just like symbols.1 but uses symbol.prec instead - of symbol. - (symbol.prec): New, just like symbol but allows INT. - * src/symtab.c (symbol_user_token_number_set): Remove an aver that no - longer holds. - * tests/regression.at (Token number in precedence declaration): New - test case. - -2008-02-06 Juan Manuel Guerrero <juan.guerrero@gmx.de> - - DJGPP specific issues. - * djgpp/config.bat: Add filenames that are not 8.3 clean and that must - be changed. Copyright timestamp adjusted. - * djgpp/config.sed: Add filenames that are not 8.3 clean and that must - be changed. Copyright timestamp adjusted. - * djgpp/config.site: Copyright timestamp adjusted. - * djgpp/config_h.sed: Copyright timestamp adjusted. - * djgpp/djunpack.bat: Copyright timestamp adjusted. - * djgpp/fnchnage.lst: Add filenames that are not 8.3 clean to the - filename translation list. - * djgpp/subpipe.c (init_subpipe): Check the environment variables - TMPDIR, TMP and TEMP, in that order, to determinate where the temp - files shall be created. Before trying to use the temp dir where the - environment variable points to check that the dir really exists. If - not default to the cwd as temp dir. Copyright timestamp adjusted. - * djgpp/subpipe.h: Copyright timestamp adjusted. - * djgpp/testsuite.sed: Copyright timestamp adjusted. - -2008-01-30 Paul Eggert <eggert@cs.ucla.edu> - - * doc/bison.texinfo: Update Back-Cover text to reflect new GNU wording. - -2008-01-09 Paul Eggert <eggert@cs.ucla.edu> - - * data/yacc.c (yyparse): Correct the comment when locations aren't used. - Problem reported by Claudio Saavedra in - <http://lists.gnu.org/archive/html/bug-bison/2008-01/msg00003.html>. - -2008-01-05 Wojciech Polak <polak@gnu.org> - - * data/xslt/xml2xhtml.xsl (xsl:template match="/"): Precede an XHTML - document's title with the input grammar file name. - -2007-12-22 Joel E. Denny <jdenny@ces.clemson.edu> - - Automate regression testing of the XML/XSLT implementation. Discussed - starting at - <http://lists.gnu.org/archive/html/bison-patches/2007-11/msg00021.html>. - * configure.ac (XSLTPROC): New substitution. - * Makefile.am (maintainer-xml-check): New phony target invoking... - * tests/Makefile.am (maintainer-xml-check): ... this new phony target - invoking make maintainer-check with BISON_TEST_XML=1. - * tests/atlocal.in (XSLTPROC): New. - * tests/local.at (AT_BISON_CHECK): New macro to (1) instruct Valgrind - not to report reachable memory when Bison is expected to have a - non-zero exit status and (2) to compare XML/XSLT output with --graph - and --report=all output for every working grammar when - BISON_TEST_XML=1. - (AT_BISON_CHECK_NO_XML): Likewise, but skip XML checks. - (AT_BISON_CHECK_XML): New. - (AT_QUELL_VALGRIND): New. - * tests/testsuite.at (ORIGINAL_AT_CHECK): Remove this and... - (AT_CHECK): ... don't redefine this since this was the old way to - quell Valgrind. - * tests/actions.at: Rewrite all AT_CHECK invocations for bison as - AT_BISON_CHECK invocations. - * tests/c++.at: Likewise. - * tests/calc.at: Likewise. - * tests/conflicts.at: Likewise. - * tests/cxx-type.at: Likewise. - * tests/existing.at: Likewise. - * tests/glr-regression.at: Likewise. - * tests/headers.at: Likewise. - * tests/input.at: Likewise. - * tests/java.at: Likewise. - * tests/output.at: Likewise. - * tests/push.at: Likewise. - * tests/reduce.at: Likewise. - * tests/regression.at: Likewise. - * tests/sets.at: Likewise. - * tests/skeletons.at: Likewise. - * tests/synclines.at: Likewise. - * tests/torture.at: Likewise. - (Big triangle): Use AT_BISON_CHECK_NO_XML instead since this grammar - tends to hang xsltproc. - (Big horizontal): Likewise. - -2007-12-08 Joel E. Denny <jdenny@ces.clemson.edu> - - In XML output, remove redundant class attribute on symbol element. - * data/xslt/bison.xsl (xsl:key name="bison:symbolByName"): New. - * data/xslt/xml2xhtml.xsl (xsl:template match="symbol"): Use it to - look up a symbol to determine whether it's a nonterminal or terminal. - * src/gram.c (rule_rhs_print_xml): Remove class attribute. - * src/state.c (state_rule_lookahead_tokens_print_xml): Likewise. - - Add prec/assoc information to XML output. - * src/gram.c (grammar_rules_print_xml): For each rule that has a - %prec, add a percent_prec attribute. - * src/print-xml.c (print_grammar): For each terminal that has a - precedence or associativity, add a prec or assoc attribute. - (xml_indent): New. - (xml_puts): Use xml_indent. - (xml_printf): Use xml_indent. - * src/print-xml.h (xml_indent): Prototype. - - * tests/existing.at (GNU pic Grammar): Fix a rule miscopied from - <http://lists.gnu.org/archive/html/bug-bison/2003-04/msg00026.html>. - -2007-12-08 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/xslt/bison.xsl (bison:ruleNumber): Rename to... - (bison:ruleByNumber): ... this for clarity. - * data/xslt/xml2dot.xsl (xsl:template match="item"): Update. - * data/xslt/xml2text.xsl (xsl:template match="item"): Update. - (xsl:template match="reduction"): Update. - (xsl:template match="item"): Update. - (xsl:template match="reduction"): Update. - - In the XML output, don't print the list of rules where symbols appear. - Compute it in XSLT instead. Discussed at - <http://lists.gnu.org/archive/html/bison-patches/2007-09/msg00024.html>. - * data/xslt/bison.xsl (bison:ruleByLhs): New. - (bison:ruleByRhs): New. - * data/xslt/xml2text.xsl (xsl:template match="terminal"): Use - bison:ruleByRhs. - (xsl:template match="terminal/rule"): Remove. - (xsl:template match="nonterminal"): Use bison:ruleByLhs and - bison:ruleByRhs. - (xsl:template match="nonterminal/left/rule|nonterminal/right/rule"): - Remove. - * data/xslt/xml2xhtml.xsl (xsl:template match="terminal"): Use - bison:ruleByRhs and mode="number-link" for rule template. - (xsl:template match="terminal/rule"): Remove. - (xsl:template match="nonterminal"): Use bison:ruleByLhs and - bison:ruleByRhs and mode="number-link" for rule template. - (xsl:template match="nonterminal/left/rule|nonterminal/right/rule"): - Rewrite as... - (xsl:template match="rule" mode="number-link"): ... this. - * src/print-xml.c (print_grammar): Don't print the list of rules. - -2007-12-01 Joel E. Denny <jdenny@ces.clemson.edu> - - Don't let --report affect XML output; always print all information. - Discussed at - <http://lists.gnu.org/archive/html/bison-patches/2007-09/msg00020.html>. - * src/conflicts.c (log_resolution): Implement. - * src/print-xml.c (print_core): Implement. - (print_state): Implement. - (print_xml): Implement. - - * NEWS (2.3a+): Fix quotes. - * src/parse-gram.y (prologue_declaration): For consistency with -v, - don't let %verbose clear the list specified by --report. - -2007-11-26 Akim Demaille <akim@epita.fr> - - * data/Makefile.am (dist_pkgdata_DATA): Ship and install bison.xsl. - -2007-11-24 Joel E. Denny <jdenny@ces.clemson.edu> - - In the XML output, list useless and unused symbols and rules with the - useful ones and add a "usefulness" attribute. Discussed starting at - <http://lists.gnu.org/archive/html/bison-patches/2007-09/msg00017.html>. - * src/gram.c (grammar_rules_partial_print_xml): Remove. - (grammar_rules_print_xml): Print all rules instead of just those - useful in the grammar, and add a "usefulness" attribute. - * src/gram.h (grammar_rules_partial_print_xml): Remove prototype. - * src/print-xml.c (print_rules_useless_in_parser): Remove. - (print_grammar): Print all nonterminals instead of just useful ones, - and add a "usefulness" attribute to nonterminals and terminals. - (print_xml): Don't print a separate "reductions" or - "rules-useless-in-parser" element. - * src/reduce.c (reduce_output): Use reduce_token_unused_in_grammar. - (reduce_xml): Remove. - (reduce_token_unused_in_grammar): New. - (reduce_nonterminal_useless_in_grammar): New. - * src/reduce.h (reduce_xml): Remove prototype. - (reduce_token_unused_in_grammar): Add prototype. - (reduce_nonterminal_useless_in_grammar): Add prototype. - * data/xslt/xml2text.xsl: Update for XML changes. - * data/xslt/xml2xhtml.xsl: Update for XML changes. - * tests/reduce.at (Useless Terminals): Update output. - (Useless Rules): Update output. - (Reduced Automaton): Update output. - - Say "Terminals unused in grammar" instead of "Unused terminals". - * NEWS (2.3a+): Update. - * doc/bison.texinfo (Understanding): Update example output. - * src/reduce.c (reduce_output): Implement. - * data/xslt/xml2text.xsl: Implement. - * data/xslt/xml2xhtml.xsl: Implement. - -2007-11-18 Joel E. Denny <jdenny@ces.clemson.edu> - - Accept --report-file=FILE to override the default `.output' filename. - * NEWS (2.3a+): Mention. - * doc/bison.texinfo (Bison Options): Add an entry. - * src/files.c (compute_output_file_names): Don't override - spec_verbose_file if already set. - * src/getargs.c (usage): Document --report-file. - (REPORT_FILE_OPTION): New anonymous enum member. - (long_options): Add entry for it. - (getargs): Add case for it setting spec_verbose_file. - - * build-aux/cross-options.pl: Don't record a short option just because - there's an arg. - * doc/.cvsignore: Add yacc.1. - -2007-11-14 Akim Demaille <akim@epita.fr> - - * doc/yacc.1.in: New. - * configure.ac, doc/Makefile.am: Adjust. - * configure.ac (PACKAGE_COPYRIGHT_YEAR): New substitution, and new - config.h symbol. - Use AC_SUBST for assignments too. - * src/getargs.c (version): Use PACKAGE_COPYRIGHT_YEAR. - -2007-11-10 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/gram.c: Remove comments that duplicate comments in gram.h. - - When reporting useless rules and nonterminals, say "useless in grammar" - instead of "useless", and say "useless in parser" instead of "never - reduced". Discussed starting at - <http://lists.gnu.org/archive/html/bison-patches/2007-10/msg00033.html>. - * NEWS (2.3a+): Mention this change. - * data/xslt/xml2text.xsl: Update output text and expected input XML - element names to match changes below. - * data/xslt/xml2xhtml.xsl: Likewise. - (xsl:template match="bison-xml-report"): Add missing entry in Table of - Contents: "Rules useless in parser due to conflicts". - * doc/bison.texinfo (Decl Summary): Reword a little. - (Understanding): Update example output for changes below. - * src/gram.c: (rule_useful_p): Rename to... - (rule_useful_in_grammar_p): ... this. - (rule_useless_p): Rename to... - (rule_useless_in_grammar_p): ... this. - (rule_never_reduced_p): Rename to... - (rule_useless_in_parser_p): ... this. - (grammar_rules_print): Update for renames. - (grammar_rules_print_xml): Update for renames. - (grammar_rules_never_reduced_report): Rename to... - (grammar_rules_useless_report): ... this since it is used for either - kind of useless rule. - * src/gram.h: Reword comments and update function names in prototypes. - * src/main.c (main): Say "rule useless in parser due to conflicts". - * src/print-xml.c (print_rules_never_reduced): Rename to... - (print_rules_useless_in_parser): ... this, and rename output XML - element "rules-never-reduced" to "rules-useless-in-parser". - (print_xml): Update for rename. - * src/print.c (print_results): Say "Rules useless in parser due to - conflicts". - * src/reduce.c (reduce_grammar_tables): Say "rule useless in grammar". - (nonterminals_reduce): Say "nonterminal useless in grammar". - (reduce_output): Say "Nonterminals useless in grammar". - Say "Rules useless in grammar". - (reduce_xml): Rename output XML element "useless" to - "useless-in-grammar". - (reduce_print): Don't report the count of grammatically useless rules - as "rules never reduced" just because %yacc is specified. - In the correct report of this count, say nonterminal(s) and rule(s) - "useless in grammar". - * tests/conflicts.at (S/R in initial): Update expected output. - (Defaulted Conflicted Reduction): Likewise. - (Unreachable States After Conflict Resolution): Likewise. - * tests/existing.at (GNU pic Grammar): Likewise. - * tests/reduce.at (Useless Nonterminals): Likewise. - (Useless Rules): Likewise. - (Reduced Automaton): Likewise. - (Underivable Rules): Likewise. - (Empty Language): Likewise. - -2007-11-09 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/bison.m4 (b4_cat): Put a newline after the end delimiter of the - here document and before the EOF so that BSD's implementation of Bourne - shell doesn't parse the delimiter as part of the here document. - * doc/.cvsignore: Add cross-options.texi. - * src/getargs.c (usage): Add a blank line after the warning categories. - -2007-11-08 Paolo Bonzini <bonzini@gnu.org> - - * data/lalr1.java (Lexer): Remove usage of b4_pure_if. - -2007-11-05 Akim Demaille <akim@epita.fr> - - Remove Id: from bison.1. - * doc/Makefile.am (remove_time_stamp): Include the sed invocation. - (perl -0777 -pi -e 's/\.PP\nId): New. - (.x.1): Use it to ignore the version control revision. - -2007-11-05 Akim Demaille <demaille@gostai.com> - - * build-aux/Makefile.am: Ship cross-options.pl. - * doc/Makefile.am: Always refer to cross-options.texi with - $(srcdir). - (MAINTAINERCLEANFILES): Add it. - -2007-11-04 Akim Demaille <demaille@gostai.com> - - Generate the long/short option cross-table. - * build-aux/cross-options.pl: New. - * doc/Makefile.am (cross-options.texi): New. - * doc/bison.texinfo: Use it. - -2007-11-04 Akim Demaille <demaille@gostai.com> - - Generate bison.1 using help2man. - * doc/common.x, doc/bison.x: New. - * doc/Makefile.am (bison.1, .x.1): New. - The code is taken from autoconf-2.61/man/Makefile.am. - * configure.ac: Look for help2man. - -2007-11-04 Akim Demaille <demaille@gostai.com> - - Complete --help. - * src/getargs.c (usage): Document -W, make it clear that -d, - -g and -x have optional arguments. - -2007-11-04 Akim Demaille <demaille@gostai.com> - - Find sha1sum when named gsha1sum. - * bootstrap (find_tool): New. - ($SHA1SUM): New. - -2007-10-28 Joel E. Denny <jdenny@ces.clemson.edu> - - Deprecate %pure-parser and add `%define api.pure'. Discussed starting - at - <http://lists.gnu.org/archive/html/bison-patches/2007-09/msg00006.html>. - * NEWS (2.3a+): Mention. - * data/bison.m4 (b4_pure_if): Don't define it here. - * data/c.m4 (b4_identification): Depend on individual skeletons to - define b4_pure_flag, b4_push_flag, or b4_pull_flag if they use the - values of the %define variables api.pure or api.push_pull. Define - YYPURE, YYPUSH, and YYPULL accordingly. - * data/glr.c: Define b4_pure_if based on `%define api.pure' unless - glr.cc has already defined b4_pure_flag. - * data/push.c: Define b4_pure_if based on `%define api.pure'. - Remove YYPUSH and YYPULL since they're back in b4_identification again. - * data/yacc.c: Define b4_pure_if based on `%define api.pure'. - * doc/bison.texinfo (Pure Decl): Update. - (Push Decl): Update. - (Decl Summary): Add api.pure to %define entry. - In %pure-parser entry, say it's deprecated and reference %define. - (Pure Calling): Update. - (Error Reporting): Update. - (C++ Scanner Interface): Update. - (How Can I Reset the Parser): Update. - (Table of Symbols): In %pure-parser entry, say it's deprecated and - reference %define. - * src/getargs.c (pure_parser): Remove global variable. - * src/getargs.h (pure_parser): Remove extern. - * src/output.c (prepare): Don't define pure_flag muscle. - * src/parse-gram.y (prologue_declaration): Implement %pure-parser as a - wrapper around `%define api.pure'. - * tests/calc.at (Simple LALR Calculator): Update. - (Simple GLR Calculator): Update. - * tests/cxx-type.at (GLR: Resolve ambiguity, pure, no locations): - Update. - (GLR: Resolve ambiguity, pure, locations): Update. - (GLR: Merge conflicting parses, pure, no locations): Update. - (GLR: Merge conflicting parses, pure, locations): Update. - * tests/glr-regression.at (Uninitialized location when reporting - ambiguity): Update - * tests/input.at (Unused %define api.pure): New test case. - * tests/local.at (_AT_BISON_OPTION_PUSHDEFS): Update definition for - AT_PURE_IF and AT_PURE_AND_LOC_IF. - * tests/push.at (Push Parsing: Memory Leak for Early Deletion): Update. - -2007-10-28 Joel E. Denny <jdenny@ces.clemson.edu> - - %define push_pull -> %define api.push_pull. Discussed starting at - <http://lists.gnu.org/archive/html/bison-patches/2007-09/msg00005.html>. - * data/push.c: Expect the new name. - * data/yacc.c: Likewise. - * doc/bison.texinfo (Push Decl): Update. - (Decl Summary): Update %define entry. - (Push Parser Function): Update. - (Pull Parser Function): Update. - (Parser Create Function): Update. - (Parser Delete Function): Update. - * tests/calc.at (Simple LALR Calculator): Update. - * tests/input.at (%define enum variables): Update. - * tests/push.at (Push Parsing: Memory Leak for Early Deletion): Update. - (Push Parsing: Multiple impure instances): Update. - (Push Parsing: Unsupported Skeletons): Update. - * tests/torture.at (Exploding the Stack Size with Alloca): Update. - (Exploding the Stack Size with Malloc): Update. - - * NEWS (2.3a+): Add an entry for the push parser, and clean up the - other entries some. - -2007-10-27 Joel E. Denny <jdenny@ces.clemson.edu> - - For the XML output's terminal element, rename @number to @token-number, - and add @symbol-number. In the nonterminal element, rename @number to - @symbol-number. Discussed starting at - <http://lists.gnu.org/archive/html/bison-patches/2007-10/msg00040.html>. - * data/xslt/xml2text.xsl (xsl:template match="terminal"): Update for - renames. - (xsl:template match="nonterminal"): Likewise. - * data/xslt/xml2xhtml.xsl (xsl:template match="terminal"): Likewise. - (xsl:template match="nonterminal"): Likewise. - * src/print-xml.c (print_grammar): Implement. - -2007-10-21 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/xslt/xml2dot.xsl (xsl:template match="automaton/state"): After - 2007-10-11 change, the child elements here are items not rules. - (xsl:template match="item"): New. - (xsl:template match="rule"): Update for new reduced itemset. - (xsl:template match="point"): Remove. - (xsl:template match="empty"): For consistency with --graph, don't - output "/* empty */". - * data/xslt/xml2text.xsl (xsl:template match="terminal"): When invoking - line-wrap, don't pass a negative value as first-line-length since this - won't work with the following changes. - (xsl:template name="line-wrap"): Simplify slightly. - (xsl:template name="ws-search"): Eliminate recursion. - * src/print_graph.c (print_core): Don't print a reduction's lookahead - set next to an item whose dot is not at the end of the RHS even if it - happens to be associated with the same rule. - -2007-10-19 Joel E. Denny <jdenny@ces.clemson.edu> - - Add %define lr.keep_unreachable_states. - * NEWS (2.3a+): Mention it in the entry for unreachable state removal. - * doc/bison.texinfo (Decl Summary): Mention it in the %define entry. - * src/main.c (main): Implement it. - * tests/conflicts.at (Unreachable States After Conflict Resolution): - Extend to test it, and fix a typo. - -2007-10-19 Joel E. Denny <jdenny@ces.clemson.edu> - - * NEWS (2.3a+): Add entry for recent .output file lookahead set fix. - * doc/bison.texinfo (Understanding): Remove a bogus lookahead set in - the example .output text. - * tests/regression.at (Extra lookahead sets in report): Improve wording - of comments. - -2007-10-17 Wojciech Polak <polak@gnu.org> - - * src/print-xml.c (print_grammar): Renamed - <terminal> and <nonterminal> attributes: - "type" to "number" and "symbol" to "name". - * data/xslt/xml2text.xsl (xsl:template match="terminal"): - Use new attribute names. - (xsl:template match="nonterminal"): Likewise. - * data/xslt/xml2xhtml.xsl: Likewise. - -2007-10-17 Joel E. Denny <jdenny@ces.clemson.edu> - - * doc/bison.texinfo (Bison Options): Add entry for --print-datadir. - (Option Cross Key): Likewise. - - * src/print-xml.c (print_core): Don't print a reduction's lookahead set - next to an item whose dot is not at the end of the RHS even if it - happens to be associated with the same rule. - * src/print.c (print_core): Likewise. - * tests/conflicts.at (Unresolved SR Conflicts): Update output. - (Resolved SR Conflicts): Update output. - * tests/regression.at (Extra lookahead sets in report): New test case. - -2007-10-11 Wojciech Polak <polak@gnu.org> - - * src/print-xml.c (print_core): Remove item set - redundancy. - * data/xslt/bison.xsl (bison:ruleNumber): New key. - Improve processing time. Suggested by Joel E. Denny. - * data/xslt/xml2dot.xsl (xsl:template name="escape"): - Write xsl:param "required" attribute as comment. - * data/xslt/xml2text.xsl (xsl:template match="item"): New. - (xsl:template match="rule"): Support new reduced itemset. - (xsl:template match="point"): Remove. - * data/xslt/xml2xhtml.xsl: Likewise. - -2007-10-09 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/getargs.c (version): Update copyright year. - -2007-10-09 Joel E. Denny <jdenny@ces.clemson.edu> - - Make xml2dot.xsl and --graph produce the same output. - * data/xslt/xml2dot.xsl (xsl:template match="rule"): Use a ` ' - instead of a `\n'. That is, don't add escapes yet or they'll be doubly - escaped later. - (xsl:template name="output-node"): Use the new escape template instead - of the string-replace template directly. - (xsl:template name="output-edge"): Likewise. - (xsl:template name="escape"): New, escapes backslashes and newlines in - addition to quotation marks. - * src/graphviz.c (start_graph, output_node, output_edge): Add - whitespace to output for legibility. - - Make xml2text.xsl and --report produce the same output, and remove the - XML "conflicts" element since a conflict summary is easily extracted - from the automaton. - * data/xslt/bison.xsl: New. - (xsl:template match="state" mode="bison:count-conflicts): New. - * data/xslt/xml2text.xsl: Import bison.xsl. - (xsl:template match="bison-xml-report"): Instead of styling the - "conflicts" element, style the "automaton" element with mode - "conflicts". Unlike the former, the latter lists S/R and R/R - conflicts for a state on the same line. - (xsl:template match="conflicts"): Remove. - (xsl:template match="conflict"): Remove. - (xsl:template match="terminal"): Line-wrap the list of rules in which - the terminal is used. - (xsl:template match="nonterminal"): Likewise for nonterminals. - (xsl:template match="automaton" mode="conflicts"): New. - (xsl:template match="state" mode="conflicts"): New. - (xsl:template name="line-wrap"): New. - (xsl:template name="ws-search"): New. - * data/xslt/xml2xhtml.xsl: Import bison.xsl. - (xsl:template match="bison-xml-report"): Instead of styling the - "conflicts" element, style the "automaton" element with mode - "conflicts." - (xsl:template match="conflicts"): Remove. - (xsl:template match="conflict"): Remove. - (xsl:template match="automaton" mode="conflicts"): New. - (xsl:template match="state" mode="conflicts): New. - * src/conflicts.c (conflicts_output_xml): Remove. - * src/conflicts.h (conflicts_output_xml): Remove prototype. - * src/print-xml.c (print_xml): Don't invoke conflicts_output_xml. - * src/print.c (print_grammar): Consistently wrap at the 66th column so - the corresponding XSLT is easier. Also, never wrap between a word and - the comma that follows it. - -2007-10-08 Joel E. Denny <jdenny@ces.clemson.edu> - - Improve C++ namespace support. Discussed starting at - <http://lists.gnu.org/archive/html/help-bison/2007-09/msg00016.html>. - * data/c++.m4: (b4_namespace_ref, b4_namespace_open, - b4_namespace_close): New macros that interpret the %define variable - "namespace" so its value can contain "::" to indicate nested - namespaces. - * data/glr.cc (b4_namespace): Don't define, and replace all uses with - the above macros. - * data/lalr1.cc (b4_namespace): Likewise. - * data/location.cc (b4_namespace): Likewise. - * doc/bison.texinfo (Decl Summary): Move `%define push_pull' entry - inside a new table in the general %define entry. Document `%define - namespace' there as well. Point the %name-prefix entry to it since it - explains it more completely in the case of C++. - (C++ Bison Interface): Mention `%define namespace' instead of - %name-prefix. - (Table of Symbols): Remove the `%define push_pull' entry. The %define - entry suffices. - * tests/c++.at (Relative namespace references): New test case. - (Absolute namespace references): New test case. - (Syntactically invalid namespace references): New test case. - * tests/input.at (C++ namespace reference errors): New test case. - -2007-10-08 Joel E. Denny <jdenny@ces.clemson.edu> - - Add syncline support and location accessor to internal %define - interfaces. - * data/bison.m4 (b4_percent_define_get_loc): New. - (b4_percent_define_get_syncline): New. - (b4_percent_define_flag_if): Use b4_percent_define_get_loc. - (b4_percent_define_default): Record defining location as line 1 rather - than 0 for the sake of synchronizing #line's, and define - b4_percent_define_syncline(VARIABLE). - (b4_percent_define_check_values): Use b4_percent_define_get_loc. - * src/muscle_tab.c (muscle_syncline_grow): New. - (muscle_code_grow): Use muscle_syncline_grow. - (muscle_percent_define_insert): Use muscle_percent_define_get_loc, and - define b4_percent_define_syncline(VARIABLE). - (muscle_percent_define_get_loc): New. - (muscle_percent_define_get_syncline): New. - (muscle_percent_define_flag_if): Use muscle_percent_define_get_loc, and - remove some unused variables. - (muscle_percent_define_default): Record defining location as line 1 - rather than 0 for the sake of synchronizing #line's, and define - b4_percent_define_syncline(VARIABLE). - (muscle_percent_define_check_values): Use - muscle_percent_define_get_loc. - * src/muscle_tab.h (muscle_percent_define_get_loc): Prototype. - (muscle_percent_define_get_syncline): Prototype. - * tests/skeletons.at (%define Boolean variables: invalid skeleton - defaults): Update output for location change. - (Complaining during macro argument expansion): Extend to test - b4_percent_define_get_loc and b4_percent_define_get_syncline errors. - -2007-10-07 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix some error-reporting macro bugs. - * data/bison.m4 (b4_cat): New. - (b4_error, b4_error_at): Use b4_cat to send error directives directly - to stdout so they don't become arguments to other macros. Update - comments and add examples. - (b4_warn, b4_warn_at, b4_complain, b4_complain_at): Update comments and - add examples. - (b4_fatal, b4_fatal_at): Likewise, and invoke m4_exit(1) immediately - after printing the error directive so that M4 doesn't report subsequent - problems that are induced by this problem. - * src/scan-skel.l: Recognize @` digraph outside of directive arguments - instead of just in them. Recognize @\n in both places. Both expand to - the empty string. Needed by b4_cat. - * tests/skeletons.at (Complaining during macro argument expansion): - New test case. - (Fatal errors make M4 exit immediately): New test case. - -2007-10-04 Joel E. Denny <jdenny@ces.clemson.edu> - - Implement --print-datadir. - * src/getargs.c (usage): Mention. - (PRINT_DATADIR_OPTION): New anonymous enum member. - (long_options): Add entry for it. - (getargs): Add case for it calling compute_pkgdatadir. - * src/output.c (output_skeleton): Encapsulate data directory - computation from here... - (prepare): ... and from here... - (compute_pkgdatadir): ... into this new function. - * src/output.h (compute_pkgdatadir): Prototype. - -2007-09-29 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/print-xml.c (escape_bufs): New static global variable - replacing... - (xml_escape_n): ... the static local variable buf here. - (print_xml): Free memory for escape_bufs. - * src/reduce.c (reduce_xml): XML-escape terminal symbol tags. - -2007-09-25 Joel E. Denny <jdenny@ces.clemson.edu> - - Replace `%push-parser' and `%push-pull-parser' with - `%define push_pull "push"' and `%define push_pull "both"'. - `%define push_pull "pull"' is the default. - * doc/bison.texinfo (Push Decl, Push Parser Function, - Pull Parser Function, Parser Create Function, Parser Delete Function): - Update declarations. - (Decl Summary, Table of Symbols): Replace %push-parser and - %push-pull-parser entries with a %define push_pull entry. - * data/bison.m4 (b4_percent_define_check_values): New macro. - (b4_pull_if, b4_push_if, b4_use_push_for_pull_if): Move these - definitions... - * data/c.m4 (b4_identification): ... and the YYPUSH and YYPULL cpp - definitions... - * data/push.c: ... to here and compute them from the value of the - %define variable push_pull. - * data/c-skel.m4: Instead of choosing the push.c skeleton for push - parsing requests here... - * data/yacc.c: ... hack this to switch to push.c any time - b4_use_push_pull_flag or the %define variable push_pull is set. This - will go away when we mv push.c yacc.c. - * data/c++-skel.m4, data/glr.c, data/java-skel.m4: Don't report that - push parsing is not supported since unused %define variables are - reported anyway. - * src/getargs.c, src/getargs.h (pull_parser, push_parser): Remove. - * src/muscle_tab.h (muscle_percent_define_check_values): Update - comments for consistency with b4_percent_define_check_values. - * src/output.c (prepare): Don't insert b4_pull_flag and b4_push_flag - muscles. - * src/parse-gram.y (PERCENT_PUSH_PARSER, PERCENT_PUSH_PULL_PARSER): - Remove. - (prologue_declaration): Remove %push-parser and %push-pull-parser - rules. - * src/scan-gram.l (%push-parser, %push-pull-parser): Remove rules. - * tests/calc.at: Update declarations. - * tests/input.at (%define enum variables): New test case. - * tests/push.at (Push Parsing: Memory Leak for Early Deletion): Update - declaration. - (Push Parsing: Multiple impure instances): Update declaration. - (Push Parsing: Unsupported Skeletons): New test case. - * tests/torture.at (Exploding the Stack Size with Alloca): Update - declaration. - (Exploding the Stack Size with Malloc): Update declaration. - -2007-09-24 Wojciech Polak <polak@gnu.org> - - Add XSLT transformations. - - * data/xslt/xml2dot.xsl: Transform XML into DOT. - * data/xslt/xml2text.xsl: Transform XML into plain text. - * data/xslt/xml2xhtml.xsl: Transform XML into XHTML. - * data/Makefile.am (xsltdir): New variable. - (dist_xslt_DATA): Add xslt/*.xsl files. - -2007-09-23 Paul Eggert <eggert@cs.ucla.edu> - - * src/conflicts.c (log_resolution): Fix indenting bugs I introduced. - Problem reported by Wojciech Polak. - * src/print-xml.c (xml_puts): Work even if LEVEL exceeds INT_MAX/2. - (xml_printf): Undo change I made on 21 September; that is, - indent 2 spaces, not 1. - -2007-09-23 Joel E. Denny <jdenny@ces.clemson.edu> - - Pacify ./configure --enable-gcc-warnings. - * src/print-xml.c, src/print-xml.h (xml_puts): Make third argument - `char const *' instead of `char *'. - * src/state.c (state_rule_lookahead_tokens_print_xml): Remove unused - local variable `sep'. - -2007-09-21 Paul Eggert <eggert@cs.ucla.edu> - - * src/gram.c (rule_rhs_print_xml): Now static, since it isn't used - elsewhere. - * src/print-xml.c: Prefer "const" after types; that's more consistent. - (xml_printf): Indent just 1 space for level. - (e_char, xlate_char): Remove. - (xml_escape_string): Rewrite to avoid undefined behavior (used - storage that was freed from the stack). - (xml_escape_n): Don't bother checking for subscript error. - -2007-09-21 Wojciech Polak <polak@gnu.org> - - Add Bison XML Automaton Report. - - Add support for an -x option to generate an XML report. - It is not documented yet. - * src/print-xml.c: New file. - * src/print-xml.h: Likewise. - * lib/timevar.def (TV_XML): New var. - * src/Makefile.am (bison_SOURCES): Add print-xml.c, print-xml.h. - * src/conflicts.c: Include print-xml.h. - (solved_conflicts_xml_obstack): New var. - (log_resolution, conflicts_solve, conflicts_free): - Add support for XML report. - (conflicts_output_val): New function. - * src/conflicts.h (conflicts_output_val): New decl. - * src/files.c (spec_xml_file): New var. - (compute_output_file_names, output_file_names_free): Add XML support. - * src/files.h (spec_xml_file): New decl. - * src/getargs.c (xml_flag): New var. - (usage, short_options, long_options, getargs): Add XML support. - * src/getargs.h (xml_flag): New decl. - * src/gram.c: Include print-xml.h. - (rule_lhs_print_xml, rule_rhs_print_xml): - (grammar_rules_partial_print_xml, grammar_rules_print_xml): - New functions. - * src/gram.h: Declare external ones. - * src/main.c: Include print-xml.h. - (main): Add XML support. - * src/reduce.c: Include print-xml.h. - (reduce_xml): New function. - * src/reduce.h: Declare it. - * src/state.c: Include print-xml.h. - (state_new): Add XML support. - (state_rule_lookahead_tokens_print_xml): New function. - * src/state.h: Declare it. - (struct state): New member solved_conflicts_xml. - * src/symtab.c (symbol_class_get_string): New function. - * src/symtab.h: Declare it. - -2007-09-21 Paul Eggert <eggert@cs.ucla.edu> - - * GNUmakefile: Switch to coreutils's version. - * bootstrap: Likewise. - * Makefile.cfg: Adjust to new GNUmakefile. - * README-hacking: Likewise. - - Import from gnulib: - - 2006-08-18 Paul Eggert <eggert@cs.ucla.edu> - Bruno Haible <bruno@clisp.org> - - * m4/bison-i18n.m4 (BISON_I18N): Also handle the case where yacc exists - and is a script that invokes bison. Tighten the code. Add comments. - -2007-08-28 Joel E. Denny <jdenny@ces.clemson.edu> - - Spell "boolean" as "Boolean". Reported by Akim Demaille. - * data/bison.m4 (b4_percent_define_flag_if): Fix complaint. - * doc/bison.texinfo (Decl Summary): Fix. - * src/muscle_tab.c (muscle_percent_define_flag_if): Fix complaint. - * tests/input.at (Boolean %define variables): Update output. - * tests/skeletons.at (%define boolean variables: invalid skeleton - defaults): Rename to... - (%define Boolean variables: invalid skeleton defaults): ... this and - update output. - -2007-08-17 Joel E. Denny <jdenny@ces.clemson.edu> - - In impure push mode, don't allow more than one yypstate to be allocated - since multiple impure parsers would corrupt yynerrs. - * data/push.c (yypstate_allocated): New static global variable - initialized to 0. - (yypull_parse): If yypstate_new returns 0, don't report it as memory - exhaustion if yypstate_allocated is 1, but still return 2. - (yypstate_new): Invoke yyerror and return 0 if yypstate_allocated is - already 1. Otherwise, set it to 1. - (yypstate_delete): Set it to 0. - * tests/push.at (Push Parsing: Multiple impure instances): New test - case. - -2007-08-17 Bob Rossi <bob@brasko.net> - - * doc/bison.texinfo (Push Decl): Document the push parser. - (Table of Symbols): Ditto. - (Pure Decl): Ditto. - (Decl Summary): Ditto. - (Multiple Parsers, Push Parser Function, Pull Parser Function, - Parser Create Function, Parser Delete Function): - Add new push parser symbols. - (Table of Symbols): Document push-parser, push-pull-parser, - yypush_parse, yypull_parse, yypstate_new and yypstate_delete. - -2007-08-15 Paul Eggert <eggert@cs.ucla.edu> - - Update to GPLv3. - * doc/gpl-3.0.texi: New file. - * doc/gpl.texi: Remove. - * COPYING, GNUmakefile, HACKING, Makefile.am, Makefile.cfg: - * Makefile.maint, NEWS, PACKAGING, README, README-alpha: - * README-hacking, TODO, bootstrap, bootstrap.conf: - * configure.ac, data/Makefile.am, data/README, data/bison.m4: - * data/c++-skel.m4, data/c++.m4, data/c-skel.m4, data/c.m4: - * data/glr.c, data/glr.cc, data/java-skel.m4, data/java.m4: - * data/lalr1.cc, data/lalr1.java, data/location.cc: - * data/push.c, data/yacc.c, data/m4sugar/m4sugar.m4: - * djgpp/Makefile.maint, djgpp/README.in, djgpp/config.bat: - * djgpp/config.sed, djgpp/config.site, djgpp/config_h.sed: - * djgpp/djunpack.bat, djgpp/subpipe.c, djgpp/subpipe.h: - * djgpp/testsuite.sed, doc/Makefile.am, doc/bison.texinfo: - * doc/fdl.texi, doc/refcard.tex, etc/Makefile.am, etc/README: - * etc/bench.pl.in, examples/Makefile.am, examples/extexi: - * examples/calc++/Makefile.am, lib/Makefile.am, lib/abitset.c: - * lib/abitset.h, lib/bbitset.h, lib/bitset.c, lib/bitset.h: - * lib/bitset_stats.c, lib/bitset_stats.h, lib/bitsetv-print.c: - * lib/bitsetv-print.h, lib/bitsetv.c, lib/bitsetv.h: - * lib/ebitset.c, lib/ebitset.h, lib/get-errno.c: - * lib/get-errno.h, lib/lbitset.c, lib/lbitset.h: - * lib/libiberty.h, lib/main.c, lib/subpipe.c, lib/subpipe.h: - * lib/timevar.c, lib/timevar.def, lib/timevar.h: - * lib/vbitset.c, lib/vbitset.h, lib/yyerror.c: - * m4/c-working.m4, m4/cxx.m4, m4/m4.m4, m4/subpipe.m4: - * m4/timevar.m4, src/LR0.c, src/LR0.h, src/Makefile.am: - * src/assoc.c, src/assoc.h, src/closure.c, src/closure.h: - * src/complain.c, src/complain.h, src/conflicts.c: - * src/conflicts.h, src/derives.c, src/derives.h, src/files.c: - * src/files.h, src/flex-scanner.h, src/getargs.c: - * src/getargs.h, src/gram.c, src/gram.h, src/graphviz.c: - * src/lalr.c, src/lalr.h, src/location.c, src/location.h: - * src/main.c, src/muscle_tab.c, src/muscle_tab.h: - * src/nullable.c, src/nullable.h, src/output.c, src/output.h: - * src/parse-gram.c, src/parse-gram.h, src/parse-gram.y: - * src/print.c, src/print.h, src/print_graph.c: - * src/print_graph.h, src/reader.c, src/reader.h, src/reduce.c: - * src/reduce.h, src/relation.c, src/relation.h: - * src/revision.h, src/scan-code.h, src/scan-code.l: - * src/scan-gram.h, src/scan-gram.l, src/scan-skel.h: - * src/scan-skel.l, src/state.c, src/state.h, src/symlist.c: - * src/symlist.h, src/symtab.c, src/symtab.h, src/system.h: - * src/tables.c, src/tables.h, src/uniqstr.c, src/uniqstr.h: - * tests/Makefile.am, tests/actions.at, tests/c++.at: - * tests/calc.at, tests/conflicts.at, tests/cxx-type.at: - * tests/existing.at, tests/glr-regression.at: - * tests/headers.at, tests/input.at, tests/java.at: - * tests/local.at, tests/output.at, tests/push.at: - * tests/reduce.at, tests/regression.at, tests/sets.at: - * tests/skeletons.at, tests/synclines.at, tests/testsuite.at: - * tests/torture.at: - Update to GPLv3. - -2007-08-11 Joel E. Denny <jdenny@ces.clemson.edu> - - Get rid of broken %no-parser, -n, and --no-parser implementation and - documentation. - * TODO: Don't mention them. - * doc/bison.1: Likewise. - * doc/bison.texinfo (Decl Summary): Likewise. - (Bison Options): Likewise. - (Option Cross Key): Likewise. - * src/getargs.c (no_parser_flag): Remove global variable. - (usage): Don't print description of -n and --no-parser. - (long_options): Remove --no-parser entry here. - (getargs): Remove -n case in the switch here. - * src/getargs.h (no_parser_flag): Remove extern. - * tests/regression.at (Web2c Actions): Remove comment that mentions - --no-parser. - -2007-08-11 Joel E. Denny <jdenny@ces.clemson.edu> - - * tests/push.at (Push Parsing: Memory Leak for Early Deletion): Do not - name user variables starting with `yy'. Just pass NULL instead of a - dummy local &yylval to yypush_parse. - * tests/torture.at (AT_DATA_STACK_TORTURE): Do not name user variables - starting with `yy'. - -2007-08-03 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/yacc.c (yyexhaustedlab): Define it when YYERROR_VERBOSE is - true since it's then always used regardless of whether yyoverflow is - defined. Reported by Christian Burger at - <http://lists.gnu.org/archive/html/bug-bison/2007-07/msg00031.html>. - * THANKS: Add Christian Burger. - - * ChangeLog: For changes in doc/bison.texinfo, consistently reference - node names: say "Decl Summary" not "Bison Declaration Summary". - -2007-07-28 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/muscle_tab.c (muscle_percent_define_flag_if): In order to - determine whether this function has already complained about an invalid - value for a %define boolean variable, don't check whether Bison has - ever examined the value. As written, the check was a tautology. - Instead, record and check for this complaint using a separate muscle. - -2007-07-27 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix push parsing memory leak reported by Brandon Lucia at - <http://lists.gnu.org/archive/html/bug-bison/2007-07/msg00032.html>. - * THANKS: Add Brandon Lucia. - * data/push.c (yypstate_delete): Free the stack if it was reallocated - but the parse never completed and thus freed it. - * tests/Makefile.am (TESTSUITE_AT): Add push.at. - * tests/testsuite.at: Include push.at. - * test/push.at: New. - (Push Parsing: Memory Leak for Early Deletion): New test case. - -2007-07-17 Joel E. Denny <jdenny@ces.clemson.edu> - - Improve handling of multiple S/R conflicts in the same state and of S/R - conflicts involving multiple reductions. - * src/conflicts.c (resolve_sr_conflict): Don't assign the error action - set for a state here or Bison will abort if it is reassigned on a - later conflicted reduction in the same state. - Similarly, don't finalize and assign the solved conflicts report here - or it will be lost if it is reassigned on a later conflicted reduction - in the same state. - (set_conflicts): Instead, assign them both here after all S/R conflicts - in the state have been fully examined. - * src/print.c (shift_set): Rename to... - (no_reduce_set): ... this. - (print_reductions): Update for rename, and add %nonassoc error action - tokens to no_reduce_set so that, when printing the first remaining - reduction on an error action token, the reduction is enclosed in - brackets. - (print_results): Update for rename. - * tests/conflicts.at (Solved conflicts report for multiple reductions - in a state): New test case. - (%nonassoc error actions for multiple reductions in a state): New test - case. - - * src/main.c (main): Don't depend on C99 features. - -2007-07-16 Joel E. Denny <jdenny@ces.clemson.edu> - - * build-aux/.cvsignore: Add compile. - * lib/.cvsignore: Add charset.alias, ref-add.sed, ref-del.sed, and - uniwidth. - -2007-07-10 Joel E. Denny <jdenny@ces.clemson.edu> - - * bootstrap (slurp): Create target directories that don't exist. - Specifically, we need lib/uniwidth/ because of recent Gnulib changes. - -2007-07-09 Joel E. Denny <jdenny@ces.clemson.edu> - - * LR0.c (new_itemsets): Fix wording in comments: say item index rather - than item number. - * closure.c (closure): Likewise. - * state.h (reductions): Comment sorting of rules. - (state): Comment sorting of items. - -2007-07-02 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix C++ test cases after recent Gnulib changes. Discussed starting at - <http://lists.gnu.org/archive/html/bug-bison/2007-07/msg00000.html>. - * examples/calc++/Makefile.am (DEFAULT_INCLUDES): Override Automake's - definition in order to avoid Gnulib headers since we don't use config.h - here. - * tests/output.at (AT_CHECK_OUTPUT_FILE_NAME): Use AT_DATA_GRAMMAR - rather than AT_DATA so that config.h is included. - -2007-07-01 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/glr.c (yy_yypstack, yypstates, yypdumpstack): Use YYFPRINTF - instead of fprintf. Guard these functions with #if YYDEBUG instead of - #ifdef YYDEBUG for consistency with all other uses of YYDEBUG in Bison - and so that YYFPRINTF is guaranteed to be defined here. - -2007-05-29 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/muscle_tab.c (muscle_percent_define_invalid_value): Replace - with... - (muscle_percent_define_check_values): ... this more helpful function. - Again, it's not used yet, but it will be. - * src/muscle_tab.h: Likewise. - - Improve some comments in parser table construction. - * src/LR0.c (new_itemsets): Explain sorting of itemset and kernel_base. - (generate_states): Don't mention ruleset, which is internal to closure. - * src/closure.c (closure): Explain sorting of core and itemset, which - is required for this function to behave correctly. - * src/closure.h (closure): Mention sorting. - -2007-05-28 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/lalr.c (state_lookahead_tokens_count): For code readability, - move the check for disabled transitions to an aver since conflict - resolution hasn't happened yet. - - * src/lalr.c (state_lookahead_tokens_count): Remove the check that - labels a state as inconsistent just because it has error transitions. - The original form of this check appeared in revision 1.1 of lalr.c, - which was committed on 1991-12-21. Now (at least), changing the - consistency label on such a state appears to have no useful effect in - any of the places it is examined, which I enumerate below. The key - point to understanding each item in this enumeration is that a state - with an error transition is labelled consistent in the first place only - if it has no rules, so the check cannot matter for states that have - rules. (1) Labelling a state as inconsistent will cause set_conflicts - to try to identify its conflicts, and a state must have *rules* to have - conflicts. (2) Labelling a state as inconsistent will affect how - action_row sets the default *rule* for the state. (3) Labelling a - state as inconsistent will cause build_relations to add lookback edges - to *rules* in that state. - * src/state.h (struct state): Word the comment for member consistent - more carefully. - -2007-05-27 Joel E. Denny <jdenny@ces.clemson.edu> - - Don't depend on C99 features. - * src/conflicts.c (conflicts_update_state_numbers): Fix for-loop. - * src/lalr.c (lalr_update_state_numbers): Fix for-loop. - * src/reader.c (check_and_convert_grammar): Fix for-loop. - * src/state.c (state_mark_reachable_states): Fix for-loop. - (state_remove_unreachable_states): Fix for-loop. - - Don't widen struct state with member reachable just to temporarily - record reachability. Instead, use a local bitset. - * src/state.h (struct state): Remove member. - * src/state.c (state_new): Don't initialize it. - (state_mark_reachable_states): Rename to... - (state_record_reachable_states): ... this, and use bitset. - (state_remove_unreachable_states): Use bitset. - -2007-05-26 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/Makefile.am (yacc): Quote target action commands properly so - that the yacc script isn't corrupt. Reported by Hans Aberg at - <http://lists.gnu.org/archive/html/bug-bison/2007-05/msg00003.html>. - - * data/glr.c (yylval): As in yacc.c, don't extern in the header for - the case of pure parsers. Reported by Frans Englich at - <http://lists.gnu.org/archive/html/help-bison/2007-05/msg00018.html>. - * THANKS: Add Frans Englich. - - * NEWS (2.3a+): In the %code entry, reference section `Bison - Declaration Summary' from the manual now since the %code summary has - moved there. - * doc/bison.texinfo (Prologue Alternatives): Mention that directives - in the rules section must be terminated by semicolons. - -2007-05-20 Joel E. Denny <jdenny@ces.clemson.edu> - - Extend the front-end API for %define variables to more completely - mirror the back-end. This will be useful in the future. - * data/bison.m4 (b4_percent_define_get, b4_percent_define_ifdef): - Update comments to mention the new front-end counterparts of these - macros. - * src/muscle_tab.c (MUSCLE_COMMON_DECODE): New macro with common code - for muscle_string_decode and muscle_location_decode. - (muscle_string_decode): New static function. - (muscle_location_decode): Use MUSCLE_COMMON_DECODE. - (muscle_percent_define_get, muscle_percent_define_ifdef): New - functions. - (muscle_percent_define_flag_if): Use muscle_percent_define_ifdef and - muscle_percent_define_get to mimic the b4_percent_define_flag_if - implementation more closely. - (muscle_percent_define_invalid_value): New function. - * src/muscle_tab.h (muscle_percent_define_get, - muscle_percent_define_ifdef, muscle_percent_define_invalid_value): - Prototype. - -2007-05-07 Joel E. Denny <jdenny@ces.clemson.edu> - - * NEWS (2.3a+): Mention yesterday's state-removal change. - (2.3a): Remove the %language entry, which was added after 2.3a. - * src/LR0.c, src/closure.c, src/closure.h, src/conflicts.c, - src/conflicts.h, src/lalr.c, src/lalr.h, src/print.c, - src/print_graph.c, src/state.c, src/state.h, tests/conflicts.at, - tests/existing.at: Update copyright date. - -2007-05-06 Joel E. Denny <jdenny@ces.clemson.edu> - - If conflict resolution makes states unreachable, remove those states, - report rules that are then unused, and don't report conflicts in those - states. - * src/conflicts.c, src/conflicts.h (conflicts_update_state_numbers): - New global function. - * src/lalr.c, src/lalr.h (lalr_update_state_numbers): New global - function. - * src/main.c (main): After conflict resolution, remove the unreachable - states and update all data structures that reference states by number. - * src/state.c (state_new): Initialize each state's reachable member to - false. - (state_mark_reachable_states): New static function. - (state_remove_unreachable_states): New global function. - * src/state.h (struct state): Add member bool reachable. - (state_remove_unreachable_states): Prototype. - * tests/conflicts.at (Unreachable States After Conflict Resolution): - New test case. - * tests/existing.at (GNU pic Grammar): Update test case output now that - an unused rule is discovered. - -2007-05-06 Joel E. Denny <jdenny@ces.clemson.edu> - - Minor code cleanup in parser table construction. - * src/LR0.c (new_itemsets): Use item_number_is_symbol_number. - (new_itemsets, save_reductions): Update for rename to nitemset. - * src/closure.c (nritemset): Rename to... - (nitemset): ... this since the "r" appears to meaningless and isn't - used in the comments. - (closure): Update for rename. - * src/closure.h (nritemset): Update extern to... - (nitemset): ... this. - * src/lalr.c (LA): Fix a typo in comments. - * src/print.c (print_core): Update for rename to nitemset. - * src/print_graph.c (print_graph): Likewise. - * src/state.h: Fix some typos in header comments. - -2007-04-04 Paul Eggert <eggert@cs.ucla.edu> - - * THANKS: Use ASCII for Sebastien Fricker's name. Bison source - still sticks to ASCII. Sorry! - - * README-hacking: New file, taken mostly from coreutils, with changes - for Bison. Contains much of the contents of: - * README-cvs: Remove. - * bootstrap: Sync from gnulib. - * build-aux/.cvsignore: Remove *.t, mkinstalldirs. - * lib/.cvsignore: Add wchar.h, wctype.h. Remove exit.h. - -2007-03-10 Joel E. Denny <jdenny@ces.clemson.edu> - - * doc/bison.texinfo (Destructor Decl): Fix typo reported by Sebastian - Setzer. - (Java Differences): Fix some typos. - * THANKS: Add Sebastian Setzer. - -2007-03-07 Paolo Bonzini <bonzini@gnu.org> - - * data/java.m4 (b4_single_class_if): Remove. - (b4_abstract_if): Look at "%define abstract". - (b4_lexer_if): New. - (b4_union_name): Rename... - (b4_yystype): ... to this. Map to "%define stype". - (b4_rhs_value, b4_parse_param_decl, b4_lex_param_decl, - b4_maybe_throws): Fix quoting. - (b4_lex_param_call): Move below to keep b4_*_param_decl close. - * data/lalr1.java (Lexer interface): Always define. - (Lexer interface within parser class): Remove. - (YYLexer class): New, used when "%code lexer" is present. - (constructor): When "%code lexer" is used, pass %lex-param - to the lexer constructor. - (yylex, yyparse): Remove %lex-param from method invocations - (YYStack, yyaction, yyparse): Rename b4_union_name to b4_yystype. - - * doc/bison.texinfo (Java Bison Interface): Mention "%define - abstract". Rename "%define union_name" to "%define stype". - Rename method names according to previous patch. - (Java Scanner Interface): Describe "%code lexer" instead of - "%pure-parser" and "%define single_class". - (Java Differences): Mention "%code lexer". - - * tests/java.at (_AT_DATA_JAVA_CALC_Y): Remove final argument. - Include scanner here, using macros from tests/local.at. - (AT_DATA_CALC_Y): Remove final argument. - (_AT_CHECK_JAVA_CALC): Likewise. - (AT_CHECK_JAVA_CALC): Likewise. Test all four combinations - of %locations and %error-verbose. - (main): Test with and without %lex-param. - * tests/local.at (_AT_BISON_OPTION_PUSHDEFS): Push AT_LEXPARAM_IF. - (AT_BISON_OPTION_POPDEFS): Pop it. - -2007-03-07 Juan Manuel Guerrero <juan.guerrero@gmx.de> - - DJGPP spefic issue. Inhibit the use of disallowed characters for - file name genertion on Win98, WinXP, etc. These are |<>":?*\ - and concern testsuite case 46. - * Makefile.am: djgpp/testsuite.sed added to EXTRA_DIST - * djgpp/testsuite.sed: Inhibit the use of disallowed characters. - * djgpp/config.bat: Inhibit the use of disallowed characters. - -2007-03-02 Joel E. Denny <jdenny@ces.clemson.edu> - - Miscellaneous %define and %code cleanup. - * data/bison.m4 (b4_percent_define_flag_if): Correct comments on how - values are interpreted. - * doc/bison.texinfo (Decl Summary): Clean up and extend %define - documentation a little more. - * src/muscle_tab.c (MUSCLE_USER_NAME_CONVERT, - muscle_percent_define_insert, muscle_percent_code_grow): New - functions/macros. - * src/muscle_tab.h (muscle_percent_define_insert, - muscle_percent_code_grow): Prototype. - * src/parse-gram.y (prologue_declaration): Use - muscle_percent_define_insert and muscle_percent_code_grow when parsing - %define and %code directives. - - Make it easy to share %define boolean variables between the front-end - and back-end. Though not used yet, this will be useful in the future. - * data/bison.m4 (b4_check_user_names): Rewrite comments to talk about - Bison uses of names rather than just skeleton uses of names. - (b4_percent_define_get, b4_percent_define_ifdef): Rename - b4_percent_define_skeleton_variables(VARIABLE) to - b4_percent_define_bison_variables(VARIABLE). - (b4_percent_code_get, b4_percent_code_ifdef): Rename - b4_percent_code_skeleton_qualifiers(QUALIFIER) to - b4_percent_code_bison_qualifiers(QUALIFIER). - (b4_check_user_names_wrap): Update for renames. - * src/muscle_tab.c, src/muscle_tab.h (muscle_percent_define_flag_if, - muscle_percent_define_default): New functions mimicking - b4_percent_define_flag_if and b4_percent_define_default. - - For %define variables, report locations for invalid values and - redefinitions. - * data/bison.m4 (b4_percent_define_flag_if): Read - b4_percent_define_loc(VARIABLE) to report the location of an invalid - value for VARIABLE. - (b4_percent_define_default): Save a special location in - b4_percent_define_loc(VARIABLE) in case the default value for VARIABLE - must later be reported as invalid. - * src/muscle_tab.c (muscle_location_grow, muscle_location_decode): New - functions. - (muscle_percent_define_insert): Record the location of VARIABLE in - muscle percent_define_loc(VARIABLE), and use it to report the previous - location for a redefinition. - (muscle_percent_define_flag_if): Update like b4_percent_define_flag_if. - (muscle_percent_define_default): Update like b4_percent_define_default. - (muscle_grow_user_name_list): Rename to... - (muscle_user_name_list_grow): ... this for consistency and use - muscle_location_grow. - * src/muscle_tab.h (muscle_location_grow): Prototype. - * tests/input.at (%define errors): Update expected output. - * tests/skeletons.at (%define boolean variables: invalid skeleton - defaults): New test case. - -2007-02-28 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/print.c (lookahead_set, state_default_rule): Remove. - (print_reductions): Replace state_default_rule invocation with - equivalent use of yydefact, which was computed in token_actions in - tables.c. - (print_results): Don't allocate lookahead_set. - -2007-02-27 Paolo Bonzini <bonzini@gnu.org> - - * data/lalr1.java: Prefix all private members with yy. - -2007-02-24 Joel E. Denny <jdenny@ces.clemson.edu> - - Use YYFPRINTF instead of fprintf where appropriate. Reported by - Sebastien Fricker at - <http://lists.gnu.org/archive/html/bug-bison/2007-02/msg00035.html>. - * THANKS: Add Sebastien Fricker. - * data/glr.c, data/push.c, data/yacc.c (yy_reduce_print): Implement. - * doc/bison.texinfo (Tracing): Make it clearer that YYFPRINTF must - accept a variable number of arguments. - -2007-02-19 Joel E. Denny <jdenny@ces.clemson.edu> - - * bootstrap: Remove occurrences of .#bootmp from lib/Makefile. - -2007-02-13 Juan Manuel Guerrero <juan.guerrero@gmx.de> - - * djgpp/config.bat: Adjustments concerning the use of autoconf 2.61. - * djgpp/config.sed: Adjustments concerning the use of autoconf 2.61. - * djgpp/config.site: Adjustments concerning the use of autoconf 2.61. - -2007-02-11 Paul Eggert <eggert@cs.ucla.edu> - - Undo my 2007-02-07 change, switching back to the c-strcase module - introduced in the 2007-02-03 change. Bruno Haible reported that - the 2007-02-07 change would be dangerous in Turkish if we add a - language whose name contains "i", since "i" is not lowercase "I" - in Turkish. - * bootstrap.conf (gnulib_modules): Add c-strcase. Remove strcase. - * lib/.cvsignore: Add c-ctype.c, c-ctype.h, c-strcase.h, - c-strcasecomp.c, c-strncasecmp.c. Remove strcasecmp.c, strncasecmp.c. - * m4/.cvsignore: Remove strcase.m4. - * src/getargs.c: Revert 2007-02-07 change, as follows. - Include c-strcase.h. - (language_argmatch): Use c_strcasecmp rather than strcasecmp. - -2007-02-11 Bruno Haible <bruno@clisp.org> - - Enable the Java related testsuite tests when the only Java compiler - found is a gcj < 4.3. Discussed at - <http://lists.gnu.org/archive/html/bug-bison/2007-02/msg00016.html>. - * configure.ac (gt_JAVACOMP): Don't specify a target_version. - -2007-02-11 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/Makefile.am: Update copyright date. - * data/push.c (yypull_parse): Report memory exhaustion and return 2 if - yypstate_new returns NULL. - (yypstate_new): Return NULL if malloc does. - * src/reader.c (packgram): Move translation of rule actions from the - beginning of packgram to... - (check_and_convert_grammar): ... here right before packgram is invoked - so it's easier to write more complete comments, and remove redundant - code. - -2007-02-10 Joel E. Denny <jdenny@ces.clemson.edu> - - As in semantic actions, make @$ in %initial-action, %destructor, and - %printer imply %locations. - * src/scan-code.l (SC_SYMBOL_ACTION): Set locations_flag = true when - scanning @$. - * tests/actions.at (AT_CHECK_ACTION_LOCATIONS): New macro supporting... - (@$ in %initial-action implies %locations, - @$ in %destructor implies %locations, - @$ in %printer implies %locations): ... these new test cases. - -2007-02-07 Paul Eggert <eggert@cs.ucla.edu> - - Undo most of the 2007-02-03 change, switching to the strcase module - now that gnulib strcase has been fixed. - * bootstrap.conf (gnulib_modules): Remove c-strcase. Add strcase. - * lib/.cvsignore: Remove c-ctype.c, c-ctype.h, c-strcase.h, - c-strcasecomp.c, c-strncasecmp.c. Add strcasecmp.c, strncasecmp.c - * m4/.cvsignore: Add strcase.m4. - * src/getargs.c: Revert 2007-02-03 change, as follows. - Don't include c-strcase.h. - (language_argmatch): Use strcasecmp rather than c_strcasecmp. - strcasecmp has "unspecified behavior" outside the POSIX locale, - but it works fine in practice if at least one argument is ASCII, - as is the case in Bison. - -2007-02-07 Paolo Bonzini <bonzini@gnu.org> - - * tests/java.at: Skip tests if only one of javac/java is present. - Reported by Joel E. Denny. - * tests/atlocal.in: Adjust copyright years. - -2007-02-05 Paolo Bonzini <bonzini@gnu.org> - - * data/lalr1.java (Stack): Work around old verifiers that disallow - access to the private fields of an inner class, from the outer class. - We can make Stack's fields public because user code doesn't have access - to the instance of Stack used by parse(). Reported by Paul Eggert. - -2007-02-03 Paul Eggert <eggert@cs.ucla.edu> - - * .cvsignore: Add javacomp.sh, javaexec.sh. Is this really - the right spot for these files? - * bootstrap.conf (gnulib_modules): Add c-strcase. - * lib/.cvsignore: Add c-ctype.c c-ctype.h, c-strcasecomp.c, - c-strncasecmp.c. - * src/getargs.c: Include c-strcase.h. - (language_argmatch): Use c_strcasecmp rather than strcasecmp, - to avoid unspecified behavior. - -2007-02-01 Joel E. Denny <jdenny@ces.clemson.edu> - - * doc/bison.texinfo (Decl Summary): Correct typo. - -2007-01-30 Paolo Bonzini <bonzini@gnu.org> - - * data/bison.m4 (b4_percent_define_flag_if): Don't treat 0 as false. - Complain if the value does not match empty, "true" or "false". - * data/c++.m4: Adjust default definitions of %define variables. - * data/java.m4: Adjust default definitions of %define variables. - * doc/bison.texinfo (Decl Summary): Adjust the %define entry according - to above behavior. - * tests/input.at (Boolean %define variables): Test new behavior. - -2007-01-29 Paolo Bonzini <bonzini@gnu.org> - - * NEWS: Mention java. - * TODO: Remove things that are done. - * bootstrap.conf: Add javacomp-script and javaexec-script. - * configure.ac: Invoke gt_JAVACOMP and gt_JAVAEXEC. - - * data/Makefile.am: Add new files. - * data/java-skel.m4: New. - * data/java.m4: New. - * data/lalr1.java: New. - - * doc/bison.texinfo: Put "A Complete C++ Example" under - C++ Parsers. Add Java Parsers. Put C++ Parsers and Java Parsers - under Other Languages. - - * src/getargs.c (valid_languages): Add Java. - * src/getargs.h (struct bison_language): Update size of string fields. - - * tests/Makefile.am: Add java.at. - * tests/atlocal.in: Add CONF_JAVA and CONF_JAVAC. - * tests/java.at: New. - * tests/testsuite.at: Include it. - -2007-01-28 Joel E. Denny <jdenny@ces.clemson.edu> - - Clean up. - * src/scan-skel.l (at_directive_perform): Add at_directive_argc and - at_directive_argv arguments so these no longer have to be global - variables. Also, update the implementation for the following changes. - (fail_for_at_directive_too_many_args, - fail_for_at_directive_too_few_args): Add at_directive_name argument. - (at_directive_name): Remove as at_directive_argv[0] will be used for - this now. - (AT_DIRECTIVE_ARGC_MAX): Increment to make space in at_directive_argv - for the directive name. - (at_directive_argc, at_directive_argv): Make these local within - skel_lex instead of global. - (INITIAL): Update directive start action for above changes. - (SC_AT_DIRECTIVE_ARG): Rename to... - (SC_AT_DIRECTIVE_ARGS): ... this, and update for above changes. - (SC_AT_DIRECTIVE_SKIP_WS): Update. - (scan_skel): Move yylex_destroy to... - (skel_scanner_free): ... here. - * tests/skeletons.at (installed skeleton file name): Rename to... - (installed skeleton file names): ... this. - -2007-01-27 Joel E. Denny <jdenny@ces.clemson.edu> - - * ChangeLog: For changes in doc/bison.texinfo, consistently reference - node names: say "Table of Symbols" not "Bison Symbols", and say "Decl - Summary" not "Directives". - * doc/bison.texinfo (Decl Summary, Calc++ Parser): Cross-reference the - %code entry in "Decl Summary" rather than the one in "Table of Symbols" - since the former is now the more complete one. - (Prologue Alternatives): Likewise and do the same for %defines. - (Table of Symbols): Add summary of %code, add summary of %define, and - move full %code documentation to... - (Decl Summary): ... here for consistency with other entries in these - sections. - Move %define entry in order to keep this list alphabetized. - Reword %define entry a little to put less emphasis on the skeleton - concept, which most users shouldn't have to think about. - -2007-01-26 Paul Eggert <eggert@cs.ucla.edu> - - Adjust to recent gnulib changes. - * lib/.cvsignore: Remove stpcpy.h, strndup.h, strnlen.h. - Add string.h, string_.h, unistd_.h, wchar_.h. - * m4/.cvsignore: Add gnulib-common.m4, string_h.m4, wchar.m4. - * src/system.h: Don't include <stpcpy.h>; this is now done by - <string.h>. - -2007-01-23 Paolo Bonzini <bonzini@gnu.org> - - Simplify implementation of unqualified %code, implement macros for - uniform treatment of boolean %define flags. Document %define. - * data/bison.m4 (b4_percent_define_ifdef, b4_percent_define_flag_if, - b4_percent_code_ifdef): New. - (b4_percent_code_get): Map unqualified %code to b4_percent_code(). - * data/c++.m4: Define default value for global_tokens_and_yystype. - * data/glr.cc: Likewise. - * data/location.cc: Use b4_percent_define_flag_if. - - * doc/bison.texinfo (Decl Summary): Document %define. - - * src/parse-gram.y (Unqualified %code): Change muscle name to - b4_percent_code(). - (content.opt): Default to empty. - -2007-01-17 Joel E. Denny <jdenny@ces.clemson.edu> - - Implement support for relative and absolute skeleton file names. - Discussed starting at - <http://lists.gnu.org/archive/html/bison-patches/2006-12/msg00071.html>. - * doc/bison.texinfo (Decl Summary): Document in %skeleton entry. - (Bison Options): Document in --skeleton entry. - * src/output.c (output_skeleton): Use strncpy rather than strcpy since - full_skeleton can't necessarily hold all of pkgdatadir. - If the specified skeleton file name contains a `/', don't prepend - pkgdatadir. - * src/parse-gram.y (prologue_declaration): If the specified skeleton - file name contains a `/', prepend the grammar file directory. - * tests/Makefile.am (TESTSUITE_AT): Add skeletons.at. - * skeletons.at: New file. - (relative skeleton file names): New test case. - (installed skeleton file names): New test case. - * tests/testsuite.at: Include skeletons.at. - - * bootstrap: Update copyright to 2007. - -2007-01-17 Paolo Bonzini <bonzini@gnu.org> - - * bootstrap: Remove occurrences of .#bootmp from the files. - -2007-01-17 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Calc++ Parser): Don't try to alias - nonterminals. - Use per-type %printer. - -2007-01-17 Joel E. Denny <jdenny@ces.clemson.edu> - - * NEWS, data/c++-skel.m4, data/c++.m4, data/c-skel.m4, data/c.m4, - data/glr.c, data/glr.cc, data/lalr1.cc, data/location.cc, - djgpp/config.site, src/files.c, src/files.h, src/main.c, - src/muscle_tab.c, src/muscle_tab.h, src/parse-gram.y, src/reader.h, - src/scan-skel.h, src/scan-skel.l, tests/actions.at, tests/calc.at, - tests/glr-regression.at, tests/input.at, tests/local.at, - tests/output.at, tests/torture.at: Update copyright to 2007. - -2007-01-16 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Calc++ Parsing Driver): Let "parse" return an - error code. - (Calc++ Scanner): Exit with failure if we can't open the input - file. - Accept "-" standing for stdin. - (Calc++ Top Level): Print the result only if the parsing was - successful. - -2007-01-16 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (yy_reduce_print_): Add a missing end-of-line. - -2007-01-15 Paolo Bonzini <bonzini@gnu.org> - and Joel E. Denny <jdenny@ces.clemson.edu> - - Clean up %define and %code implementation in M4 some. Most - importantly, rename all related macros to be in the b4_percent_define - and b4_percent_code namespaces. Also, complete support for `.' in - %define variable names and %code qualifiers. - * data/bison.m4 (b4_check_user_names): Check for special - "SKELETON-NAMESPACE(name)" macros instead of using two nested - m4_foreach loops. - (b4_get_percent_define, b4_get_percent_code): Rename to... - (b4_percent_define_get, b4_percent_code_get): ... these. - Extend documentation with examples. - For SKELETON-NAMESPACE (as documented for b4_check_user_names), use - b4_percent_define_skeleton_variables and - b4_percent_code_skeleton_qualifiers. - Expect any value for the %define variable `foo' to be stored in the - macro named `b4_percent_define(foo)'; expect any %code blocks for the - qualifier `foo' to be stored in a macro named `b4_percent_code(foo)'; - expect any unqualified %code blocks to be stored in a macro named - `b4_percent_code_unqualified'. - Use m4_indir so that %define variable names and %code qualifiers can - contain `.', which is allowed by the grammar parser. - (b4_percent_define_default): New macro to set a default value for a - %define variable. - (m4_wrap): Update wrapped code, and fix some underquoting. - (b4_check_user_names_wrap): Update and define outside the m4_wrap. - Expect grammar uses of %define variables and %code qualifiers to be - defined in b4_percent_define_user_variables and - b4_percent_code_user_qualifiers. - * data/c++.m4: Use b4_percent_define_default rather than - m4_define_default. Fix some underquoting. Skeleton usage of %define - variable define_location_comparison now implies skeleton usage of - %define variable filename_type. - * data/glr.c, data/glr.cc, data/lalr1.cc, data/location.cc, - data/push.c, data/yacc.c: Update macro names. - * src/parse-gram.y (prologue_declaration, grammar_declaration): Update - muscle names. - -2007-01-14 Juan Manuel Guerrero <juan.guerrero@gmx.de> - - DJGPP specific issues. - - * djgpp/config.site: Set ac_cv_path_mkdir to a sane DJGPP specific - default. Set gl_cv_absolute_wctype_h to a sane DJGPP specific default. - -2007-01-09 Joel E. Denny <jdenny@ces.clemson.edu> - - * tests/glr-regression.at: Use AT_PARSER_CHECK rather than AT_CHECK to - run parsers in all tests so that Valgrind is invoked during - maintainer-check-valgrind. - (Duplicate representation of merged trees): Free all semantic values. - (Duplicated user destructor for lookahead): Likewise. - -2007-01-09 Joel E. Denny <jdenny@ces.clemson.edu> - - * tests/local.at (AT_PARSER_CHECK): Add a PRE argument to specify a - command-line prefix. - * tests/torture.at (Exploding the Stack Size with Alloca): Stderr is - ignored, so use that PRE to set --log-fd=1 in VALGRIND_OPTS so we don't - miss Valgrind messages. - (Exploding the Stack Size with Malloc): Likewise. - -2007-01-09 Joel E. Denny <jdenny@ces.clemson.edu> - - Ignore YYSTACK_USE_ALLOCA for push parsers since the stacks can't be - locals. Reported by Juan Manuel Guerrero at - <http://lists.gnu.org/archive/html/bug-bison/2007-01/msg00000.html>. - * data/push.c: Enclose the #ifdef YYSTACK_USE_ALLOCA in b4_push_if. - Fix some indentation also. - * tests/torture.at (Exploding the Stack Size with Alloca): Add comment - explaining this issue. - -2007-01-09 Paolo Bonzini <bonzini@gnu.org> - and Joel E. Denny <jdenny@ces.clemson.edu> - - Simplify union and prologue handling, and escape union and lex/parse - params with digraphs. - * data/bison.m4 (b4_pre_prologue, b4_post_prologue): Set their default - values to the empty string since these are no longer guaranteed - initialized by the front-end. - * data/glr.c, data/glr.cc, data/lalr1.cc, data/push.c, data/yacc.c: Add - braces around b4_user_stype since this is no longer done by the - front-end. - * src/files.c, src/files.h (pre_prologue_obstack, - post_prologue_obstack): Remove. - * src/muscle_tab.c (muscle_pair_list_grow): Don't duplicate header - comments here. Use MUSCLE_OBSTACK_SGROW so that values are escaped - with digraphs. This fixes lex params and parse params. - * src/muscle_tab.h (muscle_pair_list_grow): Update comments. - * src/output.c (prepare): Remove muscle insertion of the prologues. - (output): Remove freeing of pre_prologue_obstack and - post_prologue_obstack. - * src/parse-gram.y (prologue_declaration): Use muscle_code_grow rather - than prologue_augment for prologue parsing so you don't need prologue - obstacks. - (grammar_declaration): For %union RHS, use `braceless' instead of - "{...}" so that braces are already stripped and code is escaped with - digraphs. - * src/reader.c (prologue_augment): Remove. - (reader): Remove initialization of pre_prologue_obstack and - post_prologue_obstack. - * src/reader.h (prologue_augment): Remove. - - * data/c.m4: Remove stray parenthesis. - -2007-01-08 Joel E. Denny <jdenny@ces.clemson.edu> - - Remove quotes from variables names in %define directives and from - qualifiers in %code directives, and restrict the characters that are - allowed in them to M4-friendly ones. For %define, continue to support - the quoted form as a deprecated feature. Discussed starting at - <http://lists.gnu.org/archive/html/bison-patches/2007-01/msg00023.html>. - * NEWS (2.3a+): Add entry for the change to %define. Update entry for - %code. - * doc/bison.texinfo (Prologue Alternatives): Update. - (Decl Summary): In %defines entry, update mention of `%code requires' - and `%code provides'. - (C++ Location Values): Update %define uses. - (Calc++ Parser Interface): Likewise. - (Calc++ Parser): Likewise, and update `%code requires' uses. - (Table of Symbols): Update %code documentation. - * src/parse-gram.y (prologue_declaration): For %define variables, use - `variable' instead of `STRING'. - (grammar_declaration): For %code qualifiers, use `ID' instead of - `STRING'. - (variable): New nonterminal that takes an `ID' or a `STRING'. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Update %code - and %define uses. - * tests/calc.at (_AT_DATA_CALC_Y): Update %define use. - * tests/input.at (Reject unused %code qualifiers): Update %code uses. - (%define errors): Update %define uses. - -2007-01-08 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/parse-gram.y (prologue_declaration): Use MUSCLE_INSERT_STRING - instead of muscle_insert for %define values so that M4-special - characters are replaced with digraphs. - * tests/input.at (%define errors): Extend to check weird values. - -2007-01-08 Joel E. Denny <jdenny@ces.clemson.edu> - - Instead of having skeletons declare all valid %define variables and - %code qualifiers, provide macros that retrieve the associated values - and build these lists automatically. Thus Bison will now warn when a - variable or qualifier is not used by the skeleton in the current - invocation regardless of whether it might sometimes be used by that - skeleton in other invocations. Also, move all %define value macros to - the b4_percent_define_ namespace, and remove the %define "NAME" {CODE} - form, which is replaced by %code. - * data/bison.m4 (b4_check_for_unrecognized_names): Rename to... - (b4_check_user_names): ... this, and change the series of valid name - arguments to a single list argument for names used in the skeleton - similar to the existing list argument for names used in the grammar. - Warn instead of complaining. - (b4_get_percent_define, b4_get_percent_code): New to retrieve %define - values and %code code, to format %code code properly, and to build - lists of all %define variables and %code qualifiers used in the - skeleton: b4_skeleton_percent_define_variables and - b4_skeleton_percent_code_qualifiers. - (b4_check_percent_define_variables, b4_check_percent_code_qualifiers): - Remove, and... - (m4_wrap): ... m4_wrap b4_check_user_names invocations instead so that - the skeleton names lists can finish building first. In place of - b4_used_percent_define_variables and b4_used_percent_code_qualifiers, - expect the lists b4_user_percent_define_variables and - b4_user_percent_code_qualifiers. - * data/c++.m4: Where setting default values for b4_parser_class_name, - b4_location_type, b4_filename_type, b4_namespace, and - b4_define_location_comparison, update their names to the - b4_percent_define_ namespace. - * data/glr.c: Don't use b4_check_percent_define_variables and - b4_check_percent_code_qualifiers. Use b4_get_percent_code. - * data/glr.cc, data/lalr1.cc: Likewise, and use b4_get_percent_define. - (b4_parser_class_name, b4_namespace): Define these using - b4_get_percent_define for parser_class_name and namespace. - * data/location.cc: Use b4_get_percent_define. - * data/push.c: Don't use b4_check_percent_define_variables and - b4_check_percent_code_qualifiers. Use b4_get_percent_code. - * data/yacc.c: Likewise, and don't call m4_exit in - b4_use_push_for_pull_if or m4_wrap code will never execute. - * src/muscle_tab.c, src/muscle_tab.h (muscle_grow_used_name_list): - Rename to... - (muscle_grow_user_name_list): ... this for consistency with the - terminology used in bison.m4. - * src/parse-gram.y (prologue_declaration): Prepend "percent_define_" to - %define variable names, and rename muscle used_percent_define_variables - to user_percent_define_variables. - (grammar_declaration): Rename muscle used_percent_code_qualifiers to - user_percent_code_qualifiers. - (content): Remove. - (content.opt): Replace content RHS with STRING RHS so %define "NAME" - {CODE} form is no longer accepted. - * tests/input.at (Reject bad %code qualifiers): Rename to... - (Reject unused %code qualifiers): ... this, and update test output. - (%define error): Update test output. - -2007-01-07 Joel E. Denny <jdenny@ces.clemson.edu> - - Check for unrecognized %define variables similar to checking for - unrecognized %code qualifiers. Check for redefined %define variables. - * data/bison.m4 (b4_check_for_unrecognized_names): New macro that - generalizes... - (b4_check_percent_code_qualifiers): ... this, which now wraps it. - (b4_check_percent_define_variables): New, also wraps it. - * data/glr.c: Unless glr.cc is wrapping glr.c, declare no valid %define - variables using b4_check_percent_define_variables. - * data/glr.cc, data/lalr1.cc: Declare the valid %define variables as - all those exercised in the test suite and all those listed in the - `Default values' section of c++.m4. Are there others? - * data/push.c, data/yacc.c: Declare no valid %define variables. - * src/muscle_tab.c, src/muscle_tab.h (muscle_find_const): New function, - similar to muscle_find, but it works even when the muscle stores a - const value. - (muscle_grow_used_name_list): New function for constructing the used - name list muscles that b4_check_for_unrecognized_names requires. - * src/parse-gram.y (prologue_declaration): Warn if a variable is - %define'd more than once. Define the b4_used_percent_define_variables - muscle with muscle_grow_used_name_list. - (grammar_declaration): Abbreviate %code code with - muscle_grow_used_name_list. - * tests/input.at (%define errors): New. - -2007-01-06 Joel E. Denny <jdenny@ces.clemson.edu> - - Provide warn_at, complain_at, and fatal_at function callbacks to the - skeletons, and use this for %code qualifier complaints. - * data/bison.m4 (b4_error_at): New, invoked by... - (b4_warn_at, b4_complain_at, b4_fatal_at): ... these new macros to wrap - the skeleton scanner's new @warn_at(...@), @complain_at(...@), and - @fatal_at(...@) directives. - (b4_check_percent_code_qualifiers): Rewrite to expect locations for - qualifiers in b4_used_percent_code_qualifiers and to use - b4_complain_at. - * src/location.c, src/location.h (boundary_set_from_string): New global - function. - * src/muscle_tab.c, src/muscle_tab.h (muscle_boundary_grow): New global - function. - * src/parse-gram.y (grammar_declaration): Add locations for qualifiers - to b4_used_percent_code_qualifiers. - * src/scan-skel.l (fail_for_at_directive_too_few_args): New static - function. - (AT_DIRECTIVE_ARGC_MAX): Increase for boundary arguments. - (lineno): Rename to... - (out_lineno): ... this so I don't misunderstand it again. - (SC_AT_DIRECTIVE_SKIP_WS): Don't increment out_lineno for newlines - here; these newlines are in the input but not the output file. - (SC_AT_DIRECTIVE_ARG): Likewise. Extract directive execution to... - (at_directive_perform): ... this new static function, and add handling - of new @warn_at(...@), @complain_at(...@), and @fatal_at(...@) - directives. - * tests/input.at (Reject bad %code qualifiers): Update test output with - locations and extend. - - * tests/output.at (Output file name: [, Output file name: ]): Remove - bogus comment about these tests failing. - -2007-01-06 Joel E. Denny <jdenny@ces.clemson.edu> - - Clean up b4_check_percent_code_qualifiers a little. - * data/bison.m4 (b4_check_percent_code_qualifiers): Expect qualifiers - in b4_used_percent_code_qualifiers to be double-M4-quoted. Rewrite - documentation and add examples. - * src/parse-gram.y (grammar_declaration): Double-M4-quote those - qualifiers here. - -2007-01-05 Joel E. Denny <jdenny@ces.clemson.edu> - - Don't use m4_divert since it makes m4_divert_push and m4_divert_pop - unreliable -- especially when they're hidden inside another macro. - * data/bison.m4, data/c++-skel.m4, data/c++.m4, data/c-skel.m4, - data/c.m4: Remove m4_divert(-1). - * data/glr.c, data/glr.cc, data/lalr1.cc, data/location.cc, - data/push.c, data/yacc.c: Likewise, and replace m4_divert(0) with - m4_divert_push(0) and m4_divert_pop(0). - * src/output.c (output_skeleton): Don't add an m4_divert_push(0) and - an m4_wrap([m4_divert_pop(0)]) to the M4. Diversion -1, which is - pushed and popped by m4sugar, should be first on the stack. - - Provide warn, complain, and fatal function callbacks to the skeletons. - This provides more flexibility than m4_fatal, improves the error - message format, and captures messages for translation. Discussed - starting at - <http://lists.gnu.org/archive/html/bison-patches/2006-12/msg00063.html>. - * data/bison.m4 (b4_error): New, invoked by... - (b4_warn, b4_complain, b4_fatal): ... these new macros to wrap the - skeleton scanner's new @warn(...@), @complain(...@), and @fatal(...@) - directives. Because these M4 macros might be called when the current - diversion is -1 or 0, m4_divert_push and m4_divert_pop is used; thus - the previous removal of uses of m4_divert, which caused trouble. - (b4_check_percent_code_qualifiers): Use b4_complain instead of - m4_fatal to report unrecognized %code qualifiers. - * data/c++-skel.m4: Use b4_complain instead of m4_fatal to report C++ - push parser requests. - * data/glr.c: Use b4_complain instead of m4_fatal to report - non-deterministic push parser requests. - Update @output usage to @output(...@) form. - * data/glr.cc, data/lalr1.cc: Use b4_fatal instead of m4_fatal to - report missing %defines. Update @output usage to @output(...@) form. - * data/location.cc, data/push.c, data/yacc.c: Update @output usage to - @output(...@) form. - * src/main.c (main): Invoke skel_scanner_free. - * src/scan-skel.h (skel_scanner_free): Prototype new function. - * src/scan-skel.l (FLEX_NO_OBSTACK): Don't define; we now need the - obstack_for_string from flex-scanner.h. - (YY_DECL): Use to declare skel_lex static. - (decode_at_digraphs): Remove; now handled in the new - SC_AT_DIRECTIVE_ARG start condition. - (fail_for_at_directive_too_many_args, fail_for_invalid_at): New static - functions. - (at_directive_name, AT_DIRECTIVE_ARGC_MAX, at_directive_argc, - at_directive_argv): New static globals. - (INITIAL): Use fail_for_invalid_at. - Don't parse `@output file_name\n' or `@basename(...@)'. Instead, - recognize the start of a generalized `@directive(...@)' form and - start... - (SC_AT_DIRECTIVE_ARG): ... this new start condition to parse the - directive args (using the new obstack_for_string), to decode the - contained @ diagraphs, and to perform the directive. It recognizes - @basename(...@), @warn(...@), @complain(...@), @fatal(...@), and - @output(...@). - (SC_AT_DIRECTIVE_SKIP_WS): New start condition started by - SC_AT_DIRECTIVE_ARG to skip whitespace after the argument delimiter, - `@,'. - (scan_skel): Initialize obstack_for_string on the first call. - (skel_scanner_free): New function to free obstack_for_string. - * tests/input.at (Reject bad %code qualifiers): Update test output. - -2007-01-04 Joel E. Denny <jdenny@ces.clemson.edu> - - Consolidate the 4 prologue alternative directives (%code, %requires, - %provides, and %code-top) into a single %code directive with an - optional qualifier field. Discussed at - <http://lists.gnu.org/archive/html/bison-patches/2007-01/msg00012.html>. - * NEWS (2.3a+): Rewrite the existing entry for the prologue - alternatives. - * doc/bison.texinfo (Prologue Alternatives): Update. - (Decl Summary): Update to %code "requires" and %code "provides". - (Calc++ Parser): Update to %code "requires". - (Table of Symbols): Remove entries for %requires, %provides, and - %code-top. Rewrite %code entry, and add a %code "QUALIFIER" entry. - * data/bison.m4 (b4_user_provides, b4_user_requires): Remove as these - are replaced by b4_percent_code_provides and b4_percent_code_requires, - which are skeleton-specific. - (b4_check_percent_code_qualifiers): New. A skeleton can use this to - declare what %code qualifiers it supports and to complain if any other - qualifiers were used in the grammar. - * data/glr.cc: Update to use b4_user_code([b4_percent_code_requires]) - and b4_user_code([b4_percent_code_provides]) in place of - b4_user_requires and b4_user_provides. - * data/glr.c, data/lalr1.cc, data/push.c, data/yacc.c: Likewise. - Add b4_user_code([b4_percent_code_top]) and - b4_user_code([b4_percent_code]). - Invoke b4_check_percent_code_qualifiers. - * src/parse-gram.y (PERCENT_CODE_TOP, PERCENT_PROVIDES, - PERCENT_REQUIRES): Remove. - (grammar_declaration): Remove RHS's for %code-top, %provides, and - %requires. Rewrite the %code RHS as the unqualified form defining the - muscle b4_percent_code. Add another RHS for the qualified %code form, - which defines muscles of the form b4_percent_code_QUALIFIER and the - b4_used_percent_code_qualifiers muscle. - * src/scan-gram.l (PERCENT_CODE_TOP, PERCENT_PROVIDES, - PERCENT_REQUIRES): Remove. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Update to use - %code "requires" and %code "provides". - * tests/input.at (Reject bad %code qualifiers): New. - -2007-01-03 Joel E. Denny <jdenny@ces.clemson.edu> - - Use the new code_props interface for destructors and printers. - * src/symtab.h (symbol, semantic_type): Remove destructor_location and - printer_location members, and change the type of the destructor and - printer members to code_props. - (symbol_destructor_set, symbol_destructor_get, symbol_printer_set, - symbol_printer_get, semantic_type_destructor_set, - semantic_type_printer_set, default_tagged_destructor_set, - default_tagless_destructor_set, default_tagged_printer_set, - default_tagless_printer_set): Use code_props in arguments and return - types in place of char const * and location. - (symbol_destructor_location_get, symbol_printer_location_get): Remove - since the locations are now contained in the return of - symbol_destructor_get and symbol_printer_get. - * src/output.c (symbol_destructors_output, symbol_printers_output): - Replace with... - (symbol_code_props_output): ... this to eliminate duplicate code. - (output_skeleton): Update to use symbol_code_props_output. - * src/reader.c (symbol_should_be_used): Update use of - symbol_destructor_get. - * src/symlist.c (symbol_list_destructor_set, symbol_list_printer_set): - Update uses of the various _destructor_set and _printer_set functions. - * src/symtab.c: (default_tagged_destructor_location, - default_tagless_destructor_location, default_tagged_printer_location, - default_tagless_printer_location): Remove since we... - (default_tagged_destructor, default_tagless_destructor, - default_tagged_printer, default_tagless_printer): ... change the type - of these to code_props. - (symbol_new, semantic_type_new, symbol_destructor_set, - semantic_type_destructor_set, symbol_destructor_get, - symbol_printer_set, semantic_type_printer_set, symbol_printer_get, - symbol_check_alias_consistency, default_tagged_destructor_set, - default_tagless_destructor_set, default_tagged_printer_set, - default_tagless_printer_set): Update. - (symbol_destructor_location_get, symbol_printer_location_get): Remove. - (SYMBOL_CODE_PRINT): New similar to SYMBOL_ATTR_PRINT but for - code_props members. - (symbol_print): Use SYMBOL_CODE_PRINT. - -2007-01-03 Joel E. Denny <jdenny@ces.clemson.edu> - - Use the new code_props interface for rule actions. - * src/symlist.h (symbol_list): Replace action, action_location, and - used members with a code_props action_props member. - * src/reader.c (symbol_should_be_used, grammar_rule_check, - grammar_midrule_action, grammar_current_rule_merge_set, - grammar_current_rule_symbol_append, packgram): Update. - * src/scan-code.h (translate_rule_action): Remove, no longer used. - * src/scan-code.l (handle_action_dollar): Update. - (translate_rule_action): Remove, no longer used. - * src/symlist.c (symbol_list_sym_new, symbol_list_syms_print): Update. - -2007-01-02 Joel E. Denny <jdenny@ces.clemson.edu> - - Use the new code_props interface in parse-gram.y. - * src/parse-gram.y (prologue_declaration, braceless, epilogue.opt): - Update all uses of translate_* functions to use the new code_props - interface and to use gram_scanner_last_string_free and - code_scanner_last_string_free where possible. - (grammar_declaration): symbol_list_destructor_set and - symbol_list_printer_set now perform the translation, so don't do it - here. Use gram_scanner_last_string_free where possible. - * src/scan-code.h, src/scan-code.l (translate_symbol_action, - translate_code): Remove, no longer used. - * src/symlist.h, src/symlist.c (symbol_list_destructor_set, - symbol_list_printer_set): Perform code translation here rather than - depending on the caller to do so. - - * src/symlist.h (struct symbol_list): Correct some documentation typos. - * src/scan-gram.h (gram_last_string): Remove declaration. - * src/scan-gram.l (last_string): Declare it static. - -2007-01-02 Joel E. Denny <jdenny@ces.clemson.edu> - - Encapsulate code properties and related functionality for the various - destructors, printers, and actions into a code_props structure and - interface. This patch merely implements code_props in scan-code.h and - scan-code.l. Future patches will rewrite other modules to use it. - Discussed starting at - <http://lists.gnu.org/archive/html/bison-patches/2006-11/msg00020.html>. - * src/location.h (EMPTY_LOCATION_INIT): Define so that it's easier to - consistently initialize const structs that have an empty location - field. - * src/location.c (empty_location): Initialize with EMPTY_LOCATION_INIT - to ensure consistency. - * src/scan-code.h (code_props): New structure. - (code_props_none_init, CODE_PROPS_NONE_INIT, code_props_none): New - function, macro, and const global variable for initializing a - code_props with no code. - (code_props_plain_init, code_props_symbol_action_init, - code_props_rule_action_init, code_props_translate_code): The rest of - the new code_props functional interface. Among other things, the init - functions set the code_props kind field so that - code_props_translate_code will know whether to behave like - translate_symbol_action, translate_rule_action, or translate_code. - These old translate functions must remain until all other modules are - updated to use the new code_props interface. - (code_scanner_last_string_free): New function similar to - gram_scanner_last_string_free. - (code_scanner_free): Add documentation. - * src/scan-code.l: Implement the new interface. - (code_lex): Make it static, add a code_props* argument, and remove the - rule argument. - (last_string): New static global similar to the one in scan-gram.l. - (SC_RULE_ACTION): Update to use the code_props* argument to code_lex - instead of rule. - (SC_SYMBOL_ACTION): For $$, set the is_value_used member of the - code_props since Bison may one day use this information for destructors - and printers. - (<*><<EOF>>): Use STRING_FINISH so that last_string is set. - (handle_action_dollar): Use symbol_list_n_get and set used flag - directly since symbol_list_n_used_set is removed. - (translate_action): Add a code_props* argument and remove the rule, - action, and location arguments. Pass the code_props* on to code_lex. - (translate_rule_action, translate_symbol_action, translate_code): - Rewrite as wrappers around the new code_props interface. - * src/symlist.h, src/symlist.c (symbol_list_n_used_set): Remove since - it would eventually need to break the encapsulation of code_props. - -2007-01-01 Joel E. Denny <jdenny@ces.clemson.edu> - - * etc/.cvsignore: New. - -2007-01-01 Joel E. Denny <jdenny@ces.clemson.edu> - - Add maintainer-push-check to run maintainer-check using push parsing in - place of pull parsing where available. - * Makefile.am (maintainer-push-check): New. - * data/bison.m4 (b4_use_push_for_pull_if): New. - * data/push.c: Redefine b4_push_if and b4_use_push_for_pull_if - appropriately based on their existing values. - (yypush_parse): Don't print push-parser-specific diagnostics if push - parsing is being used in place of pull parsing. - * data/yacc.c: If push parsing should replace pull parsing, redirect to - push.c. - * src/output.c (prepare): Check BISON_USE_PUSH_FOR_PULL environment - variable, and insert b4_use_push_for_pull_flag into muscles. - * tests/Makefile.am (maintainer-push-check): New. - -2006-12-31 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/push.c (yypush_parse): Set yynew = 1 at the end of a parse - (whether successful or failed) so that yypush_parse can be invoked - again to start a new parse using the same yypstate. - * tests/torture.at (AT_DATA_STACK_TORTURE): For push mode, extend to - check multiple yypull_parse invocations on the same yypstate. For pull - mode, extend to check multiple yyparse invocations. - (Exploding the Stack Size with Alloca): Extend to try with - %push-pull-parser. - (Exploding the Stack Size with Malloc): Likewise. - - * tests/calc.at (Simple LALR Calculator): Don't specify - %skeleton "push.c" since %push-pull-parser implies that now. - * tests/headers.at (export YYLTYPE): Don't check for the push - declarations. Otherwise, this test case can't be used to see if push - mode can truly emulate pull mode. - * tests/input.at (Torturing the Scanner): Likewise. - * tests/local.at (AT_YACC_OR_PUSH_IF, AT_PUSH_IF): Remove. - (AT_YYERROR_SEES_LOC_IF): Rather than AT_YACC_OR_PUSH_IF, use - AT_YACC_IF, which now includes the case of push mode since %skeleton - need not be used for push mode. This will be more intuitive once - push.c is renamed to yacc.c. - -2006-12-31 Joel E. Denny <jdenny@ces.clemson.edu> - - For push mode, convert yyparse from a macro to a function, invoke yylex - instead of passing a yylexp argument to yypull_parse, and don't - generate yypull_parse or yyparse unless %push-pull-parser is declared. - Discussed starting at - <http://lists.gnu.org/archive/html/bison-patches/2006-12/msg00163.html>. - * data/bison.m4 (b4_pull_if): New. - * data/c.m4 (b4_identification): Define YYPULL similar to YYPUSH. - * data/push.c: Improve M4 quoting a little. - (b4_generate_macro_args, b4_parenthesize): Remove. - (yyparse): If there's a b4_prefix, #define this to b4_prefix[parse] - any time a pull parser is requested. - Don't #define this as a wrapper around yypull_parse. Instead, when - both push and pull are requested, make it a function that does that - same thing. - (yypull_parse): If there's a b4_prefix, #define this to - b4_prefix[pull_parse] when both push and pull are requested. - Don't define this as a function unless both push and pull are - requested. - Remove the yylexp argument and hard-code yylex invocation instead. - * etc/bench.pl.in (bench_grammar): Use %push-pull-parser instead of - %push-parser. - * src/getargs.c (pull_parser): New global initialized to true. - * getargs.h (pull_parser): extern it. - * src/output.c (prepare): Insert pull_flag muscle. - * src/parse-gram.y (PERCENT_PUSH_PULL_PARSER): New token. - (prologue_declaration): Set both push_parser and pull_parser = true for - %push-pull-parser. Set push_parser = true and pull_parser = false for - %push-parser. - * src/scan-gram.l: Don't accept %push_parser as an alternative to - %push-parser since there's no backward-compatibility concern here. - Scan %push-pull-parser. - * tests/calc.at (Simple LALR(1) Calculator): Use %push-pull-parser - instead of %push-parser. - * tests/headers.at (export YYLTYPE): Make yylex static, and don't - prototype it in the module that calls yyparse. - * tests/input.at (Torturing the Scanner): Likewise. - * tests/local.at (AT_PUSH_IF): Check for %push-pull-parser as well. - -2006-12-26 Joel E. Denny <jdenny@ces.clemson.edu> - - Update etc/bench.pl. Optimize push mode a little (the yyn change - deserves most of the credit). - * Makefile.am (SUBDIRS): Add etc subdirectory. - * configure.ac (AC_CONFIG_FILES): Add etc/bench.pl and etc/Makefile. - * data/push.c (b4_declare_parser_state_variables): Move yyn, yyresult, - yytoken, yyval, and yyloc declarations to... - (yyparse or yypush_parse): ... here to improve performance. For - yypush_parse invocations after the first, be sure to assign yyn its old - value again. - (yypstate_new): Don't bother initializing the yyresult field since the - initial value isn't used. - (yyn, yyresult, yytoken, yyval, yyloc): For each NAME in this list, - remove the #define that, in push mode, set it to yyps->NAME. - * etc/Makefile.am: New. - * etc/bench.pl: Remove and build it instead from... - * etc/bench.pl.in: ... this new file. Use @abs_top_builddir@ to invoke - "tests/bison" from the build directory by default rather than just - invoking "bison" from $PATH. - (calc_grammar): Update push parser code: don't declare yylval globally, - don't define yyparse_wrapper, and don't #define yyparse. - (bench_grammar): Update to check all working combinations of yacc.c, - push.c, impure, pure, pull, and push. - -2006-12-25 Joel E. Denny <jdenny@ces.clemson.edu> - - For push mode, add pull wrappers around yypush_parse. - * data/push.c: (b4_generate_macro_args, b4_parenthesize): New macros. - (yypull_parse): New function wrapping yypush_parse. - (yyparse): New #define wrapping yypull_parse. - * tests/calc.at (_AT_DATA_CALC_Y): Call yyparse even when %push-parser - is declared. - * tests/headers.at (export YYLTYPE): Make yylex global. For push mode, - prototype yylex in the module that calls yyparse, and don't prototype - yyparse there. Otherwise, the yyparse expansion won't compile. - * tests/input.at (Torturing the Scanner): Likewise. - -2006-12-25 Joel E. Denny <jdenny@ces.clemson.edu> - - Enable push parsers to operate in impure mode. Thus, %push-parser no - longer implies %pure-parser. The point of this change is to move - towards being able to test the push parser code by running the entire - test suite as if %push-parser had been declared. - * data/push.c (yypush_parse): For impure mode, remove the - yypushed_char, yypushed_val, and yypushed_loc arguments. - Instead, declare these as local variables initialized to the global - yychar, yylval, and yylloc. - For the first yypush_parse invocation only, restore the initial values - of these global variables when it's time to read a token since they - have been overwritten. - * src/parse-gram.y (prologue_declaration): Don't set pure_parser for - %push-parser. - * tests/calc.at (Simple LALR(1) Calculator): Always declare - %pure-parser along with %push-parser since this test case was designed - for pure push parsers. - * tests/local.at (AT_PURE_OR_PUSH_IF): Remove unused. - (AT_YACC_OR_PUSH_IF): New. - (AT_YYERROR_SEES_LOC_IF): Fix enough that the test suite passes, but - add a note that it's still wrong for some cases (as it has been for a - while). - (AT_PURE_LEX_IF): Use AT_PURE_IF instead of AT_PURE_OR_PUSH_IF since - %push-parser no longer implies %pure-parser. - -2006-12-20 Joel E. Denny <jdenny@ces.clemson.edu> - - Remove some unnecessary differences between the pull parser code and - the push parser code. This patch enables yynerrs in push mode. - * data/push.c: Reformat M4 a little. - (b4_yyerror_range): Remove and convert all uses to just yyerror_range. - (b4_declare_scanner_communication_variables): Don't omit yynerrs just - because push mode is on. Instead, if pure mode is on, move yynerrs - to... - (b4_declare_parser_state_variables): ... here. - (yynerrs, yyerror_range): For push mode, #define each NAME in this list - to yyps->NAME so it can be used in yypush_parse. - (yypush_parse): Don't omit uses of yynerrs in push mode. - -2006-12-20 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix bug such that the first pushed token's value and location are - sometimes overwritten (sometimes by %initial-action) before being used. - * data/push.c (yypush_parse): Rename arguments yynchar, yynlval, and - yynlloc to yypushed_char, yypushed_val, and yypushed_loc for clarity. - For the first yypush_parse invocation, initialize yychar to YYEMPTY to - more closely mimic the pull parser logic. - Don't copy the pushed token to yychar, yylval, and yylloc until it's - time to read a token, which is after any initialization of yylval and - yylloc. - (gottoken): Rename label to... - (yyread_pushed_token): ... for clarity and to avoid infringing on the - user namespace. - -2006-12-20 Joel E. Denny <jdenny@ces.clemson.edu> - - Rearrange initialization of the parser state variables so that the - skeleton doesn't have to have a copy for pull mode and another for push - mode. This patch also fixes at least a bug such that yylloc was not - initialized (with b4_location_initial_line and - b4_location_initial_column) upon calling yypush_parse. However, that - initialization now overwrites the first token's location; - %initial-action assigning @$ already did the same thing, and both bugs - will be fixed in a later patch. - * data/push.c (b4_yyssa): Remove and convert all uses to just yyssa. - (b4_declare_parser_state_variables): Remove initialization of yytoken, - yyss, yyvs, yyls, and yystacksize. - (yypstate_new): Remove initialization of some yypstate fields: yystate, - yyerrstatus, yytoken, yyss, yyvs, yyls, yystacksize, yyssp, yyvsp, and - yylsp. - (yyssa, yyvsa, yylsa): For push mode, #define each NAME in this list to - yyps->NAME so it can be used in yypush_parse. - (yyparse or yypush_parse): For yypush_parse, don't print the - "Starting parse" diagnostic for invocations after the first. - Add initialization of yytoken, yyss, yyvs, yyls, and yystacksize; for - yypush_parse, only do it for the first invocation. - Allow yystate, yyerrstatus, yyssp, yyvsp, yylsp, and yylloc - initialization to occur in yypush_parse but only on the first - invocation. - -2006-12-19 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/push.c: Add CPP guards around push parser declarations in both - the header and the code file. - In the code file, move the push parser declarations to the same place - they appear in the header file. - Clean up the M4 some, especially the inconsistent underquoting in - some b4_c_function_def and b4_c_function_decl uses. - -2006-12-19 Joel E. Denny <jdenny@ces.clemson.edu> - - Encapsulate the push parser state variables into an M4 macro so the - push skeleton doesn't have to list them again for pull mode's yyparse. - For push mode, remove yypush_parse's local equivalents of these - variables to eliminate unnecessary copying between the two sets at - run-time. This patch also fixes at least a bug related to multiple - %initial-action invocations in push mode. - * data/push.c (b4_declare_parser_variables): Rename to... - (b4_declare_scanner_communication_variables): ... this for clarity and - update both uses. - (b4_declare_yyparse_variables): Remove and move its contents to the one - spot where it was invoked. - (b4_declare_parser_state_variables): New macro containing the parser - state variables required by push mode. - (struct yypstate): Replace all fields but yynew with - b4_declare_parser_state_variables. - (yystate, yyn, yyresult, yyerrstatus, yytoken, yyss, yyssp, yyvs, - yyvsp, yyls, yylsp, yystacksize, yyval, yyloc): For push mode, #define - each NAME in this list to yyps->NAME so it can be used in yypush_parse. - (yyparse or yypush_parse): For yyparse in pull mode, replace local - parser state variable declarations with - b4_declare_parser_state_variables. - Don't initialize parser state variables when calling yypush_parse since - yypstate_new already does that. - Invoke the user's initial action only upon the first yypush_parse - invocation. - Remove all code that copies between the local parser state variables - and the yypstate. - -2006-12-19 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/push.c (union yyalloc): Rename yyss, yyvs, and yyls fields to - prevent a name collision in a future patch where these names will - sometimes be #define'd. - (YYSTACK_RELOCATE): Add an argument to select a union yyalloc field - since it no longer has the same name as the existing argument. - (yyparse or yypush_parse): Update all uses of YYSTACK_RELOCATE. - -2006-12-19 Paolo Bonzini <bonzini@gnu.org> - and Joel E. Denny <jdenny@ces.clemson.edu> - - * doc/bison.texinfo (Decl Summary): In the %language entry, mention - that the argument is case-insensitive, and there's no `=' here. - For the %skeleton entry, mention that %language is better. - (Bison Options): Likewise for --language and --skeleton. Move the - --skeleton entry so that the `Tuning the parser' section is sorted - alphabetically on long options. - (C++ Bison Interface): Don't use the word skeleton. Don't explain the - %language directive in detail here; cross-reference the %language - documentation instead. - (Calc++ Parser): Use `%require "@value{VERSION}"' rather than - `%require "2.3b"' so that the example is always up-to-date. - (Table of Symbols): Add entries for %language and %skeleton. - * examples/extexi (normalize): Instead of replacing every %require - argument with the current Bison version, just substitute for - `@value{VERSION}'. This guarantees that we're testing what actually - appears in the documentation. - * examples/calc++/Makefile.am ($(calc_extracted)): Use `$(VERSION)' - rather than `@VERSION@'. - -2006-12-18 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Reword the %language news a bit, and put it earlier. - - * src/getargs.c (skeleton_arg): Last arg is now location const *. - Rewrite to simplify the logic. - (language_argmatch): Likewise. - (program_name): We now own this var. - * src/getargs.h (struct bison_language): Use char[] rather than - const char *. - - * doc/bison.texinfo (Decl Summary, Bison Options): Don't claim - Java is supported. - * src/complain.c (program_name): Remove decl; no longer needed. - * src/main.c (program_name): Remove; now belongs to getargs. - -2006-12-18 Paolo Bonzini <bonzini@gnu.org> - - * NEWS: Document %language. - - * data/Makefile.am (dist_pkgdata_DATA): Add c-skel.m4, c++-skel.m4. - - * data/c-skel.m4, data/c++-skel.m4: New files. - * data/glr.c: Complain on push parsers. - - * doc/bison.texinfo (C++ Parser Interface): Prefer %language - over %skeleton. - (Decl Summary): Document %language and %skeleton. - (Command line): Document -L. - - * examples/extexi: Rewrite %require directive. - * examples/calc++/Makefile.am: Pass VERSION to extexi. - - * src/files.c (compute_exts_from_gc): Look in language structure - for .y extension. - (compute_file_name_parts): Check whether .tab should be added. - * src/getargs.c (valid_languages, skeleton_prio, language_prio): - (language, skeleton_arg, language_argmatch): New. - (long_options): Add --language. - (getargs): Use skeleton_arg, add -L/--language. - * src/getargs.h: Include location.h. - (struct bison_language, language, skeleton_arg, language_argmatch): New. - * src/output.c (prepare): Pick default skeleton from struct language. - Don't dispatch C skeletons here. - * src/parse-gram.y (PERCENT_LANGUAGE): New. - (prologue_declaration): Add "%language" rule, use skeleton_arg. - * src/scan-gram.l ("%language"): New rule. - - * tests/calc.at: Test %skeleton and %language. - * tests/local.at (AT_SKEL_CC_IF): Look for %language. - (AT_GLR_IF): Look for %skeleton "glr.cc". - (AT_LALR1_CC_IF, AT_GLR_CC_IF): Rewrite. - (AT_YACC_IF): Reject %language. - -2006-12-18 Paul Eggert <eggert@cs.ucla.edu> - - * src/symtab.h (struct semantic_type): Remove the tag 'semantic_type', - since it wasn't used; only the typedef name 'semantic_type' is needed. - Also, omit trailing white space. - - * bootstrap: Sync from coreutils. - (gnulib_extra_files): Add build-aux/announce.gen. - (slurp): Adjust .gitignore files like .cvsignore files. - * build-aux/announce-gen: Remove from CVS, since bootstrap - now creates this. - -2006-12-16 Joel E. Denny <jdenny@ces.clemson.edu> - - Make %push-parser imply %pure-parser. This fixes several bugs; see - <http://lists.gnu.org/archive/html/bison-patches/2006-12/msg00148.html>. - * src/parse-gram.y (prologue_declaration): For %push-parser, also set - pure_parser = true. - * data/push.c: Don't bother testing b4_push_if when deciding whether - to expand b4_declare_parser_variables globally. - (yypush_parse): Likewise in here. - - * data/push.c (yypush_parse): Add b4_parse_param to arguments. - (yy_reduce_print): Reformat M4 for readability. - -2006-12-15 Bob Rossi <bob@brasko.net> - and Joel Denny <jdenny@ces.clemson.edu> - - * data/push.c (yypstate): Add typedef, and update all uses of - struct yypstate to just yypstate. - * tests/calc.at (_AT_DATA_CALC_Y): Update here as well. - -2006-12-14 Bob Rossi <bob@brasko.net> - - * data/push.c (yypush_parse): Declare prototype regardless of - %locations option. - -2006-12-14 Bob Rossi <bob@brasko.net> - - * data/push.c (yyparse): Remove the prototype and the #define when in - push-parser mode. - -2006-12-13 Bob Rossi <bob@brasko.net> - - * data/push.c (yypstate_init): Rename to... - (yypstate_new): ... this and use b4_c_function_def. - (yypstate_delete): New. - (yypush_parse): Change parameters yynval and yynlloc to be const. - * tests/calc.at (_AT_DATA_CALC_Y): Use new yypstate_new and - yypstate_delete functions. - -2006-12-13 Joel E. Denny <jdenny@ces.clemson.edu> - - * configure.ac (AC_PREREQ): Require Autoconf 2.61 because of our - strange test case titles. Reported by Bob Rossi. - -2006-12-13 Paul Eggert <eggert@cs.ucla.edu> - - * TODO: Add pointer to Sylvain Schmitz's work on static detection - of potential ambiguities in GLR grammers. - -2006-12-12 Joel E. Denny <jdenny@ces.clemson.edu> - - * tests/testsuite.at (AT_CHECK): When checking if $1 starts with - `bison ', use m4_index instead of m4_substr since chopping up a string - containing M4-special characters causes problems here. - - Fix a couple of bugs related to special characters in user-specified - file names, and make it easier for skeletons to compute output file - names with the same file name prefix as Bison-computed output file - names. - * data/glr.cc, data/push.c, data/yacc.c: In @output, use - b4_parser_file_name and b4_spec_defines_file instead of - @output_parser_name@ and @output_header_name@, which are now redundant. - * data/glr.c, data/lalr1.cc: Likewise. Also, in header #include's, use - b4_parser_file_name, b4_spec_defines_file, and the new - @basename(FILENAME@) instead of @output_parser_name@ and - @output_header_name@, which inappropriately escaped the file names as - C string literals. - * src/files.c (all_but_ext): Remove static qualifier. - (compute_output_file_names): Move `free (all_but_ext)' to... - (output_file_names_free): ... here since all_but_ext is needed later. - * src/files.h (all_but_ext): Extern. - * src/muscle_tab.h (MUSCLE_INSERT_STRING_RAW): New macro that does - exactly what MUSCLE_INSERT_STRING used to do. - (MUSCLE_INSERT_STRING): Use MUSCLE_OBSTACK_SGROW so that M4-special - characters are escaped properly. - * src/output.c (prepare): Define muscle file_name_all_but_ext as - all_but_ext. - For pkgdatadir muscle, maintain previous functionality by using - MUSCLE_INSERT_STRING_RAW instead of MUSCLE_INSERT_STRING. The problem - is that b4_pkgdatadir is used inside m4_include in the skeletons, so - digraphs would never be expanded. Hopefully no one has M4-special - characters in his Bison installation path. - * src/scan-skel.l: Don't parse @output_header_name@ and - @output_parser_name@ anymore since they're now redundant. - In @output, use decode_at_digraphs. - Parse a new @basename command that invokes last_component. - (decode_at_digraphs): New. - (BASE_QPUTS): Remove unused. - * tests/output.at (AT_CHECK_OUTPUT_FILE_NAME): New macro. - (Output file name): New tests. - -2006-12-09 Joel E. Denny <jdenny@ces.clemson.edu> - - Warn about output files that are generated by the skeletons and that - conflict with other output files. - * data/glr.c: Don't generate the header file here when glr.cc does. - * src/files.c (file_names, file_names_count): New static globals. - (compute_output_file_names): Invoke output_file_name_check for files - not generated by the skeletons and remove existing checks. - (output_file_name_check): New function that warns about conflicting - output file names. - (output_file_names_free): Free file_names. - * src/files.h (output_file_name_check): Declare. - * src/scan-skel.l: Invoke output_file_name_check for files generated by - the skeletons. - * tests/output.at (AT_CHECK_CONFLICTING_OUTPUT): New. - (Conflicting output files): New tests. - -2006-12-09 Ralf Wildenhues <Ralf.Wildenhues@gmx.de> - - * doc/bison.texinfo: Fix a couple of typos. - -2006-12-08 Bob Rossi <bob@brasko.net> - - * data/push.c: (yypvarsinit, yypvars, struct yypvars, yypushparse): - Rename to... - (yypstate_init, yypstate, struct yypstate, yypush_parse): ... these and - update all uses. - (b4_yyssa, b4_yyerror_range, yypstate_init): Rename pv to yyps. - (yypush_parse): Rename yypvars argument to yyps and remove redundant - local pv. - (yypstate_init, yypush_parse): Declare in Bison-generated header file. - * tests/calc.at (_AT_DATA_CALC_Y): Use newly named functions. - -2006-12-07 Bob Rossi <bob@brasko.net> - and Joel Denny <jdenny@ces.clemson.edu> - - * data/push.c (yypvarsinit): Change return type from void* to struct - yypvars*. No longer cast to void* on return. - (struct yypvars): Remove yylen since it need not be remembered between - yypushparse invocations. - (yypushparse): Don't copy between yylen and pv->yylen. - -2006-12-05 Bob Rossi <bob@brasko.net> - - * data/push.c (yychar_set, yylval_set, yylloc_set): Delete. - (yypushparse): Add yynchar, yynlval, yynlloc parameters. - (b4_declare_parser_variables): Do not declare yynerrs for push mode. - (struct yypvars): Remove b4_declare_parser_variables. - (yypvarsinit): Remove init code for removed variables. - (global scope): Do not declare b4_declare_parser_variables if - push or pure mode. - (yypushparse): Add b4_declare_parser_variables. - Init new local variables, and remove init code for removed - yypvars variables. - (yyparse): Delete. - * tests/calc.at (_AT_DATA_CALC_Y): Call yypushparse for push mode - and yyparse for other modes. - (AT_CHECK_CALC_LALR): Added '%skeleton "push.c"' for push tests. - * tests/local.at (AT_PUSH_IF, AT_PURE_OR_PUSH_IF): Added. - (AT_YYERROR_SEES_LOC_IF): push-parser makes this false. - (AT_PURE_LEX_IF): True if pure or push parser. - -2006-12-05 Joel E. Denny <jdenny@ces.clemson.edu> - - Document Yacc prologue alternatives and default %destructor's and - %printer's as experimental. Don't mention Java yet. Discussed at - <http://lists.gnu.org/archive/html/bison-patches/2006-12/msg00002.html>. - * NEWS (2.3a+): Say they're experimental. Remove any mention of Java. - (2.3a): Annotate this entry to say the old forms of these features were - also experimental. - * doc/bison.texinfo (Prologue Alternatives, Freeing Discarded Symbols, - Table of Symbols): Say they're experimental. Comment out any mention - of Java (we'll want this back eventually). - -2006-12-01 Joel E. Denny <jdenny@ces.clemson.edu> - - Support a file name argument to %defines. Deprecate `=' in - %file-prefix, %name-prefix, and %output. Discussed at - <http://lists.gnu.org/archive/html/help-bison/2006-09/msg00001.html>. - * NEWS (2.3a+): Mention. - * doc/bison.texinfo (Decl Summary, Table of Symbols): Add entry for new - form of %defines, and remove `=' from entries for %file-prefix, - %name-prefix, and %output. - * src/parse-gram.y (prologue_declaration): Implement. - * tests/calc.at (Simple LALR Calculator, Simple GLR Calculator, Simple - LALR1 C++ Calculator, Simple GLR C++ Calculator): Remove the `=' from - all but one occurrence of %name-prefix. - * tests/headers.at (export YYLTYPE): Remove the `=' from %name-prefix. - * tests/local.at (_AT_BISON_OPTION_PUSHDEFS): Likewise. - * tests/output.at (AT_CHECK_OUTPUT): Remove the `=' from all but one - occurrence of each of %file-prefix and %output. Add check for %defines - with argument. - * tests/reduce.at (Useless Terminals, Useless Nonterminals, - Useless Rules, Reduced Automaton, Underivable Rules, Empty Language): - Remove the `=' from %output. - -2006-11-21 Joel E. Denny <jdenny@ces.clemson.edu> - - Don't escape $ in test case titles since Autoconf 2.61 now does that - correctly. - * tests/actions.at (Default %printer and %destructor are not for error - or $undefined): Here. - (Default %printer and %destructor are not for $accept): Here. - * tests/input.at (Invalid $n and @n): Here. - -2006-11-20 Joel E. Denny <jdenny@ces.clemson.edu> - - Rename <!> to <>. Discussed starting at - <http://lists.gnu.org/archive/html/bison-patches/2006-11/msg00039.html>. - * NEWS (2.3a+): Update. - * doc/bison.texinfo (Freeing Discarded Symbols, Table of Symbols): - Update. - * src/parse-gram.y (TYPE_TAG_NONE, generic_symlist_item): Implement. - * src/scan-gram.l (INITIAL): Implement. - * src/symlist.c (symbol_list_default_tagless_new): Update comment. - * src/symlist.h (symbol_list, symbol_list_default_tagless_new): Update - comment. - * tests/actions.at (Default tagless %printer and %destructor, - Default tagged and per-type %printer and %destructor, - Default %printer and %destructor are not for error or $undefined, - Default %printer and %destructor are not for $accept, - Default %printer and %destructor for mid-rule values): Update. - * tests/input.at (Default %printer and %destructor redeclared, - Unused values with default %destructor): Update. - -2006-11-17 Joel E. Denny <jdenny@ces.clemson.edu> - - Don't let %prec take a nonterminal. - * src/reader.c (grammar_current_rule_prec_set): Make the %prec symbol a - token. - * tests/input.at (%prec takes a token): New test checking that %prec - won't take a nonterminal. - -2006-11-10 Joel E. Denny <jdenny@ces.clemson.edu> - - * tests/testsuite.at (AT_CHECK): Don't miss an exit value of 0 because - it was double-quoted. - * src/Makefile.am (YACC): Use --warnings=all,error so that Bison's own - grammar is maintained with Bison's highest standards. - * src/getargs.c: Fix some typos in Doxygen comments. - -2006-11-10 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix memory leaks in scanners generated by at least Flex 2.5.9 and - later. Reported by Paul Eggert in - <http://lists.gnu.org/archive/html/bison-patches/2006-11/msg00014.html>. - * src/flex-scanner.h (yylex_destroy): Define for Flex before 2.5.9. - * src/scan-code.l (translate_action): Don't bother invoking - yy_delete_buffer (YY_CURRENT_BUFFER) before creating the first buffer. - (code_scanner_free): Instead of invoking - yy_delete_buffer (YY_CURRENT_BUFFER) directly, invoke yylex_destroy, - which frees more. - * src/scan-gram.l (gram_scanner_free): Likewise. - * src/scan-skel.l (scan_skel): Likewise. - -2006-11-09 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/files.c (tr): Change return type to void. - * src/muscle_tab.c (muscle_insert): Free storage in case muscle_grow - has been called previously for the same key. - (muscle_find): Return storage instead of value so that - --enable-gcc-warnings doesn't produce warnings that the return discards - const. aver that the value and storage are the same since storage - could potentially be NULL when value is not. - * tests/testsuite.at (AT_CHECK): Treat an unspecified exit value the - same as 0. - -2006-11-08 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap.conf (excluded_files): Exclude m4/codeset.m4 (undoing - the earlier change today), m4/intl.m4, m4/intldir.m4. This gives - us a slightly cleaner distribution, and also works. - * m4/.cvsignore: Add inline.m4, wint_t.m4 to accommodate recent - gnulib changes. - -2006-11-08 Joel E. Denny <jdenny@ces.clemson.edu> - and Paul Eggert <eggert@cs.ucla.edu> - - Don't let Bison leak memory except when it complains. - * src/files.h (parser_file_name, spec_verbose_file, spec_graph_file): - (spec_defines_file, dir_prefix): Now char *, not const char *, - since they are freed. - * src/files.c: Likewise. - (all_but_ext, all_but_tab_ext, src_extension, header_extension): - Likewise. - (tr): Now operates in-place. All uses changed. - (compute_exts_from_gf, compute_exts_from_src): Don't leak temporary - values. - (compute_file_name_parts, compute_output_file_names): Don't store - read-only data in variables that will be freed. - (compute_output_file_names): Free all_but_ext, all_but_tab_ext, - src_extension, and header_extension. - (output_file_names_free): New public function to free - spec_verbose_file, spec_graph_file, spec_defines_file, - parser_file_name, and dir_prefix. - * src/getargs.c (getargs): Don't store read-only data in variables that - will be freed. - * src/main.c (main): Invoke output_file_names_free, code_scanner_free - (which previously existed but was unused), and quotearg_free. - * src/muscle_tab.h (muscle_insert): value arg is now a `char const *'. - * src/muscle_tab.c: Likewise. - (muscle_entry): Make the value char const *, - and add a new storage member that is char * and can be freed. - (muscle_entry_free): New private function. - (muscle_init): Use it instead of free. - (muscle_insert, muscle_grow): Update and use new storage member. - (muscle_code_grow): Free the string passed to muscle_grow - since it's not needed anymore. - * src/parse-gram.y (%union): Make `chars' member a `char const *', and - add a new `char *code' member. - ("{...}"): Declare semantic type as code. - * src/scan-code.h (translate_rule_action): - (translate_symbol_action, translate_code, translate_action): Return - `char const *' rather than `char *' since external code should not free - these strings. - * src/scan-code.l: Likewise. - * src/scan-gram.l (<SC_BRACED_CODE>): Use val->code for BRACED_CODE, - which is "{...}" in the parser. - * tests/Makefile.am (maintainer-check-valgrind): Set - VALGRIND_OPTS='--leak-check=full --show-reacheable=yes' before invoking - Valgrind. - * tests/calc.at (_AT_DATA_CALC_Y): fclose the FILE* so Valgrind doesn't - complain. - * tests/testsuite.at (AT_CHECK): Redefine so that running Bison and - expecting a non-zero exit status sets --leak-check=summary and - --show-reachable=no for Valgrind. Bison unabashedly leaks memory in - this case, and we don't want to hear about it. - -2006-11-08 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap (runtime-po/Makevars): Derive from po/Makevars - instead of from the template, to simplify configuration a bit. - * bootstrap.conf (excluded_files): Don't exclude m4/codeset.m4 - and m4/wint_t.m4, as they are needed with the latest gnulib. - -2006-10-31 Joel E. Denny <jdenny@ces.clemson.edu> - - Disable unset/unused mid-rule value warnings by default, and recognize - --warnings=midrule-values to enable them. Discussed starting at - <http://lists.gnu.org/archive/html/help-bison/2006-10/msg00030.html>. - * NEWS (2.3a+): Mention. - * src/getargs.c, src/getargs.h (warnings_args, warnings_types, enum - warnings): Add entry for midrule-values subargument. - * src/reader.c (symbol_should_be_used): Don't return true just because - the value is a set/used mid-rule value unless - --warnings=midrule-values was specified. - * tests/input.at (Unused values, Unused values before symbol - declarations): Run tests with and without --warnings=midrule-values. - - * src/reader.c (check_and_convert_grammar): Use symbol_list_free rather - than LIST_FREE directly. - -2006-10-31 Joel E. Denny <jdenny@ces.clemson.edu> - - Finish implementing --warnings=error, which should not be implied by - --warnings=all (or by its synonyms -W and --warnings without - subarguments). - * src/complain.c (set_warning_issued): New function to report that - warnings are being treated as errors and to record an error if so. - Invoke... - (warn_at, warn): ... here. - * src/getargs.c (warnings_args, warnings_types): Reorder so that - "error - warnings are errors" does not appear above "all - all of the - above". - (getargs): For -W and --warnings without subarguments, don't let - FLAGS_ARGMATCH set warnings_error in warnings_flag. - * src/getargs.h (enum warnings): Unset warnings_error in warnings_all. - -2006-10-31 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/getargs.c (flags_argmatch): Don't cause segmentation fault for - empty subargument list. For example: `bison --warnings= parser.y'. - -2006-10-21 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/push.c, data/yacc.c: Make sure there's a newline at the end of - the parser header file so that gcc doesn't warn. - -2006-10-21 Joel E. Denny <jdenny@ces.clemson.edu> - - Split the default %destructor/%printer into two kinds: <*> and <!>. - Discussed starting at - <http://lists.gnu.org/archive/html/bison-patches/2006-09/msg00060.html>. - * NEWS (2.3a+): Mention. - * doc/bison.texinfo (Freeing Discarded Symbols): Document this and the - previous change today related to mid-rules. - (Table of Symbols): Remove %symbol-default and add <*> and <!>. - * src/parse-gram.y (PERCENT_SYMBOL_DEFAULT): Remove. - (TYPE_TAG_ANY): Add as <*>. - (TYPE_TAG_NONE): Add as <!>. - (generic_symlist_item): Remove RHS for %symbol-default and add RHS's - for <*> and <!>. - * src/scan-gram.l (PERCENT_SYMBOL_DEFAULT): Remove. - (TYPE_TAG_ANY, TYPE_TAG_NONE): Add. - * src/symlist.c (symbol_list_default_new): Split into tagged and - tagless versions. - (symbol_list_destructor_set, symbol_list_printer_set): Split - SYMLIST_DEFAULT case into SYMLIST_DEFAULT_TAGGED and - SYMLIST_DEFAULT_TAGLESS. - * src/symlist.h: Update symbol_list_default*_new prototypes. - (symbol_list.content_type): Split enum value SYMLIST_DEFAULT into - SYMLIST_DEFAULT_TAGGED and SYMLIST_DEFAULT_TAGLESS. - * src/symtab.c (default_destructor, default_destructor_location, - default_printer, default_printer_location): Split each into tagged and - tagless versions. - (symbol_destructor_get, symbol_destructor_location_get, - symbol_printer_get, symbol_printer_location_get): Implement tagged - default and tagless default cases. - (default_destructor_set, default_printer_set): Split each into tagged - and tagless versions. - * src/symtab.h: Update prototypes. - * tests/actions.at (Default %printer and %destructor): Rename to... - (Default tagless %printer and %destructor): ... this, and extend. - (Per-type %printer and %destructor): Rename to... - (Default tagged and per-type %printer and %destructor): ... this, and - extend. - (Default %printer and %destructor for user-defined end token): Extend. - (Default %printer and %destructor are not for error or $undefined): - Update. - (Default %printer and %destructor are not for $accept): Update. - (Default %printer and %destructor for mid-rule values): Extend. - * tests/input.at (Default %printer and %destructor redeclared): Extend. - (Unused values with default %destructor): Extend. - -2006-10-21 Joel E. Denny <jdenny@ces.clemson.edu> - - Don't apply the default %destructor/%printer to an unreferenced midrule - value. Mentioned at - <http://lists.gnu.org/archive/html/bison-patches/2006-09/msg00104.html>. - * src/symtab.c (dummy_symbol_get): Name all dummy symbols initially - like $@n instead of just @n so that the default %destructor/%printer - logic doesn't see them as user-defined symbols. - (symbol_is_dummy): Check for both forms of the name. - * src/reader.c (packgram): Remove the `$' from each midrule symbol - name for which the midrule value is referenced in any action. - * tests/actions.at (Default %printer and %destructor for mid-rule - values): New test. - * tests/regression.at (Rule Line Numbers, Web2c Report): Update output - for change to dummy symbol names. - -2006-10-20 Joel E. Denny <jdenny@ces.clemson.edu> - - Warn about unset midrule $$ if the corresponding $n is used. - * src/reader.c (symbol_should_be_used): Check midrule parent rule for - $n usage. - (packgram): Before invoking grammar_rule_check on any rule, make sure - all actions have already been scanned in order to set `used' flags. - Otherwise, checking that a midrule's $$ is set will not always work - properly because the midrule check must forward-reference the midrule's - parent rule. - * tests/input.at (AT_CHECK_UNUSED_VALUES): Extend to check the new - warning. - -2006-10-20 Joel E. Denny <jdenny@ces.clemson.edu> - - More improvements to the documentation of the prologue alternatives: - * NEWS (2.3a+): Mention the new `Prologue Alternatives' section in the - Bison manual. - * doc/bison.texinfo (Prologue Alternatives): Correct some errors. Add - some text to clarify the relative importance of the new directives and - to show how these directives may be viewed as code labels. - -2006-10-16 Joel E. Denny <jdenny@ces.clemson.edu> - - Similar to the recently removed %before-header, add %code-top as the - alternative to the pre-prologue. Mentioned at - <http://lists.gnu.org/archive/html/bison-patches/2006-10/msg00063.html>. - Also, let the prologue alternatives appear in the grammar section. - * src/parse-gram.y (PERCENT_CODE_TOP): New token. - (prologue_declaration): Move the existing prologue alternatives to... - (grammar_declaration): ... here and add %code-top. - * src/scan-gram.l (PERCENT_CODE_TOP): New token. - - Clean up and extend documentation for the prologue alternatives. - * NEWS (2.3a+): Describe prologue alternatives. - * doc/bison.texinfo (Prologue): Move discussion of prologue - alternatives to... - (Prologue Alternatives): ... this new section, and extend it to discuss - all 4 directives in detail. - (Table of Symbols): Clean up discussion of prologue alternatives and - add %code-top. - -2006-10-16 Juan Manuel Guerrero <juan.guerrero@gmx.de> - - DJGPP specific issues. - - * djgpp/config.bat: config.hin has been moved to lib. Adjust - config.bat accordingly. - * djgpp/config.sed: Adjust config.sed for the use of autoconf 2.60. - * djgpp/config.site: Likewise. - -2006-10-16 Paolo Bonzini <bonzini@gnu.org> - - Replace %*-header with %provides, %requires, %code. See discussion at - http://lists.gnu.org/archive/html/bison-patches/2006-10/msg00002.html - - * data/bison.m4 (b4_user_requires, b4_user_provides): New. - (b4_user_start_header): Remove. - * data/glr.c: Use new macros instead of b4_*start_header - and b4_*end_header. - * data/glr.cc: Likewise. - * data/lalr1.cc: Likewise. - * data/push.c: Likewise. - * data/yacc.c: Likewise. - - * doc/bison.texinfo: Remove %before-header, rename - %{start,end,after}-header to %requires, %provides, %code. - - * src/parse-gram.y: Likewise (also rename token names accordingly). - * src/scan-gram.l: Likewise. - * tests/actions.at: Likewise. - -2006-10-14 Paul Eggert <eggert@cs.ucla.edu> - - * lib/Makefile.am (AM_CFLAGS): Remove $(WERROR_CFLAGS). - Problem reported by Joel E. Denny. - -2006-10-14 Jim Meyering <jim@meyering.net> - - (Sync from coreutils.) - Work also when the working directory (with e.g. coreutils sources) - is version controlled with git, rather than CVS. - * bootstrap (CVS_only_file): Test for the existence of README-cvs, - rather than CVS. - In messages and comments, say e.g., "checked-out sources", - rather than "CVS sources". - (version_controlled_file): New function. Work for git as well as - for CVS. Don't use grep's -q option. - (slurp): Call it here, in place of CVS-specific code. - -2006-10-14 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix testsuite for ./configure --enable-gcc-warnings: - * configure.ac (gcc-warnings): Move -Wall before -Wno-sign-compare. - Otherwise, gcc 4.1.0 (at least) warns about sign comparisons in - __AT_CHECK_PRINTER_AND_DESTRUCTOR in tests/actions.at. - * test/input.at (Torturing the Scanner): #include <stdlib.h> for abort. - * test/regression.at (Diagnostic that expects two alternatives): - Likewise. - -2006-10-12 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap.conf (gnulib_modules): Add config-h. - * djgpp/subpipe.c: Include <config.h> unconditionally; don't - worry about HAVE_CONFIG_H. - * lib/abitset.c: Likewise. - * lib/bitset.c: Likewise. - * lib/bitset_stats.c: Likewise. - * lib/bitsetv-print.c: Likewise. - * lib/bitsetv.c: Likewise. - * lib/ebitset.c: Likewise. - * lib/get-errno.c: Likewise. - * lib/lbitset.c: Likewise. - * lib/subpipe.c: Likewise. - * lib/timevar.c: Likewise. - * lib/vbitset.c: Likewise. - * lib/bitset.c: Include "bitset.h" first, to test interface. - * lib/bitset_stats.c: Include "bitset_stats.h" first. - * lib/bitsetv-print.c: Include "bitsetv-print.h" first. - * lib/bitsetv.c: Include "bitsetv.h" first. - * lib/get-errno.c: Include "get-errno.h" first. - * m4/.cvsignore: Add config-h.m4. - * tests/actions.at (Default %printer and %destructor for ...): - Adjust expected line numbers in output to reflect removal of #if - HAVE_CONFIG_H lines. - * tests/glr-regression.at (Missed %merge type warnings when ...): - Likewise. - * tests/regression.at (Braced code in declaration in rules section): - Likewise. - * tests/atlocal.in (CPPFLAGS): Don't define HAVE_CONFIG_H. - * tests/local.at (AT_DATA_GRAMMAR_PROLOGUE): - Include <config.h> unconditionally. - - * bootstrap: Sync from coreutils, as follows: - - 2006-10-11 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap (symlink_to_gnulib): Fix bug: the dot_dots shell - variable was sometimes used without being initialized. This - messed up the installation of the INSTALL file in some cases. - - 2006-10-09 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap (usage, main program, symlink_to_gnulib): Add option - --copy. Inspired by a suggestion from Bruno Haible. - - 2006-10-03 Jim Meyering <jim@meyering.net> - - * bootstrap: Undo last change to this file, since now gnulib-tool - sticks with the automake default in generating dependencies. - -2006-10-12 Paul Eggert <eggert@cs.ucla.edu> - - * configure.ac: Use AC_PROG_CC_STDC; this is more modern than - the old AC_PROG_CC / AM_PROG_CC_STDC combination. - - * doc/bison.1: Add copyright notice. - - * data/glr.c: Don't include <stdarg.h>; not used. - - * NEWS: The -g and --graph options now output graphs in Graphviz - DOT format, not VCG format. - * doc/bison.1: Likewise. - * doc/bison.texinfo (Understanding, Bison Options): Likewise. - * THANKS: Add Satya Kiran Popuri, who proposed the initial version - of this change in - <http://lists.gnu.org/archive/html/bison-patches/2006-09/msg00158.html>. - * TODO: Remove Graphviz entry. - * src/Makefile.am (bison_SOURCES): Add graphviz.c and graphviz.h; - remove vcg.c, vcg.h, vcg_defaults.h. - * src/vcg.c, src/vcg.h, src/vcg_defaults.h: Remove. - * src/graphviz.c, src/graphviz.h: New files. - * src/files.c (compute_output_file_names): Output .dot, not .vcg. - * src/files.h: Make comment more generic. - * src/main.c (main): Likewise. - * src/print_graph.h: Likewise. - * src/getargs.c (usage): Make usage description more generic. - * src/print_graph.c: Include graphviz.h rather than vcg.h. - (static_graph, fgraph): Remove. All uses changed to pass - arguments instead of sharing a static var. - (print_core, print_actions, print_state, print_graph): - Output graphviz format rather than VCG format. - * tests/.cvsignore: Remove *.vcg; add *.dot. - * tests/output.at: Expect *.dot files, not *.vcg files. - - * data/Makefile.am (dist_pkgdata_DATA): Add bison.m4; this - accommodates the 2006-10-08 change. - -2006-10-11 Bob Rossi <bob@brasko.net> - - * data/push.c (yypushparse, yypvarsinit, yypvars): Wrap in b4_push_if. - (b4_yyssa, b4_yyerror_range): New macros. - (struct yypvars): Remove yyssa_ptr and yyerror_range_ptr fields. - (yypvarsinit): Remove init of removed fields. - (yypushparse): Remove use of removed fields; use new macros instead. - -2006-10-11 Paul Eggert <eggert@cs.ucla.edu> - - * data/push.c (yypushparse): Fix memory leak if yymsg is malloced - in a push parser. Reindent slightly to match yacc.c better. - -2006-10-11 Bob Rossi <bob@brasko.net> - - * data/push.c (struct yypvars): Remove yymsgbuf, yymsgbuf_ptr, yymsg, - yymsg_alloc fields. - (yypvarsinit, yypushparse): Remove init of removed fields. - (yypushparse): Use yymsgbuf instead of yymsgbuf_ptr. - -2006-10-09 Paul Eggert <eggert@cs.ucla.edu> - - * THANKS: Add Paolo Bonzini and Bob Rossi. - -2006-10-08 Paolo Bonzini <bonzini@gnu.org> - - * data/c.m4 (b4_copyright, b4_epilogue, b4_location_initial_column, - b4_location_initial_line, p4_parse_param, b4_ints_in, b4_flag_if, - b4_define_flag_if and uses, b4_basename, b4_syncline, b4_user_code, - b4_define_user_cde and uses): Remove. - (b4_comment, b4_prefix, b4_sync_start): New. - * data/bison.m4: New file, with most of the content removed from c.m4. - * src/muscle_tab.h: Use "do {...} while(0)" throughout. - * src/output.c (output_skeleton): Pass bison.m4. - (prepare): Pass glr_flag and nondeterministic_flag. Pass prefix - only if specified. - -2006-10-05 Paul Eggert <eggert@cs.ucla.edu> - - Fix test failure reported by Tom Lane in - <http://lists.gnu.org/archive/html/bug-bison/2006-10/msg00000.html> - and try to make such failures easier to catch in the future. - * data/glr.c (YYTRANSLATE): Don't check for nonpositive arg; - that's now the caller's responsibility. - (yyprocessOneStack, yyrecoverSyntaxError, yyparse): - Set yychar = YYEOF if it's negative. - * tests/actions.at (yylex): Abort if asked to read past EOF. - * tests/conflicts.at (yylex): Likewise. - * tests/cxx-type.at (yylex): Likewise. - * tests/glr-regression.at (yylex): Likewise. - * tests/input.at (yylex): Likewise. - * tests/regression.at (yylex): Likewise. - * tests/torture.at (yylex): Likewise. - -2006-10-01 Paul Eggert <eggert@cs.ucla.edu> - - Fix problems with translating English-language diagnostics. - * bootstrap: Fix bug introduced in recent bootstrap changes, with - respect to bison-runtime pot generation. The YY_ stuff - wasn't being captured. - * bootstrap.conf (XGETTEXT_OPTIONS_RUNTIME): New var. - * po/POTFILES.in: Add src/location.c, src/scan-code.l. - * runtime-po/POTFILES.in: Add data/push.c. - -2006-09-29 Paul Eggert <eggert@cs.ucla.edu> - - Merge bootstrap changes from coreutils. - - 2006-09-28 Jim Meyering <jim@meyering.net> - - Automatically generated dependencies are important even - when all of the sources in a directory come from gnulib. - * bootstrap (gnulib_tool): Remove the "no-dependencies" automake - option that gnulib-tool adds to what becomes our lib/gnulib.mk. - - 2006-09-23 Jim Meyering <jim@meyering.net> - - * bootstrap (gnulib_tool_options): Add "--local-dir gl". - - 2006-09-20 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap: Add support for --force. - (usage): New function. Describe usage less tersely. - (CVS_only_file): New var. - -2006-09-21 Paul Eggert <eggert@cs.ucla.edu> - - * data/push.c (YYPUSH_MORE): Make it an enum instead. - (yypushparse): Use YYPUSH_MORE instead of the mystery constant. - Adjust white space and comments to match GNU style better. - -2006-09-20 Bob Rossi <bob@brasko.net> - - * data/push.c (yyresult_get): Remove function. - (YYPUSH_MORE): Add #define. - (yypushparse): Modify return value. - -2006-09-20 Paul Eggert <eggert@cs.ucla.edu> - - * stamp-h.in: Remove; no longer needed. - * .cvsignore: Replace autom4te.cache and config.cache with *.cache. - Remove config.h, config.hin, intl (no longer created). - * lib/.cvsignore: Add config.h, config.hin, configmake.h, inttypes.h, - stamp-h1. - - Sync bootstrap from coreutils, as follows: - - 2006-09-18 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap (symlink_to_gnulib): New function. - (cp_mark_as_generated): Use it, to prefer symlinks-to-gnulib - to copies-of-gnulib. - (cp_mark_as_generated, slurp, gnulib_files): - Avoid making a copy if it's the same as the old version. - (gnulib_files): Add support for this variable (used by Bison). - -2006-09-20 Paul Eggert <eggert@cs.ucla.edu> - - * src/getargs.c (usage): Rework to use conventions similar to - coreutils, to make translation a bit easier and the code a bit - smaller. Problem reported by Tim Van Holder. - -2006-09-15 Paul Eggert <eggert@cs.ucla.edu> - - Use some of gnulib's new modules, taken from coreutils. - - * bootstrap: Sync from coreutils, except add support for gnulib_files. - * bootstrap.conf: New file. - (gnulib_modules): Add configmake, inttypes, unistd. - (XGETTEXT_OPTIONS): Add complain, complain_at, - fatal, fatal_at, warn, warn_at, unexpected_end. - * configure.ac (AC_CONFIG_HEADERS): config.h is now in lib, not here. - (gl_USE_SYSTEM_EXTENSIONS): Remove; gl_EARLY now does this. - (gl_EARLY): Add. - (AM_STDBOOL_H): Remove; gl_INIT now dows this. - (gl_INIT): Add - (GNULIB_AUTOCONF_SNIPPET): Remove. - (AM_GNU_GETTEXT): Add; require formatstring macros since that's - the pickiest. - * lib/.cvsignore: Add inttypes_.h. - * lib/Makefile.am: Include gnulib.mk first so we can append to it. - (AM_CFLAGS): Add WERROR_CFLAGS, to be more like coreutils. - (BUILT_SOURCES, EXTRA_DIST, MOSTLYCLEANFILES): Remove - no-longer-necessary initializations. - (lib_SOURCES): Remove, replacing by libbison_a_SOURCES. - * lib/subpipe.c: Include <unistd.h> unconditionally, now that we - use the unistd module. - * src/system.h: Likewise. - * m4/.cvsignore: Remove *_gl.m4, gnulib.m4, inttypes_h.m4, uintmax_t.m4, - ulonglong.m4. Add gettext.m4, gnulib-cache.m4, gnulib-comp.m4, - gnulib-tool.m4, inttypes-h.m4, inttypes-pri.m4, inttypes.m4. - * src/Makefile.am (DEFS): Remove, since configmake does this for us. - (AM_CPPFLAGS): Remove -I../lib, since Automake does that for us. - * src/system.h: Include inttypes.h unconditionally, now that we - use the inttypes module. Don't bother to include stdint.h, since - inttypes.h now does that for us. - (LOCALEDIR): Remove, now that we use the configmake module. - * src/getargs.c: Include configmake.h. - * src/main.c: Likewise. - * src/output.c: Likewise. - * tests/atlocal.in (CPPFLAGS): Include from $abs_top_builddir/lib, - not from $abs_top_builddir, since config.h moved. - - - Port to GCC 2.95. First two problems reported by Michael Deutschmann in - <http://lists.gnu.org/archive/html/bug-bison/2006-09/msg00018.html>. - - * src/parse-gram.y (symbol_declaration): Don't put statements - before declarations; it's not portable to C89. - * src/scan-code.l (handle_action_at): Likewise. - - * src/scan-code.l: Always initialize braces_level; the old code - left it uninitialized and therefore had undefined behavior. - - Don't attempt to redefine 'assert', since it runs afoul of - systems where standard headers (mistakenly) include <assert.h>. - Instead, define and use our own alternative, called 'aver'. - * src/reader.c: Don't include assert.h, since we no longer - use assert. - * src/scan-code.l: Likewise. - * src/system.h (assert): Remove, replacing with.... - (aver): New function, taking a bool arg. All uses changed. - * src/tables.c (pack_vector): Ensure that aver arg is bool, - not merely an integer. - -2006-09-15 Bob Rossi <bob@brasko.net> - - * data/Makefile.am (dist_pkgdata_DATA): Add push.c. - * data/c.m4 (YYPUSH): New. - (b4_push_if): New macro. Use it instead of #ifdef YYPUSH. - * src/getargs.c (push_parser): New var. - * src/getargs.h (push_parser): New declaration. - * src/output.c (prepare): Add macro insertion of `push_flag'. - * src/parse-gram.y (PERCENT_PUSH_PARSER): New token. - (prologue_declaration): Parse %push-parser. - * src/scan-gram.l: Scan new PERCENT_PUSH_PARSER token. - * tests/calc.at (_AT_CHECK_CALC_ERROR): Add "Return" and "Now" to - list of removed lines from the traces observed. - (AT_CHECK_CALC_LALR): Added push parser tests. - -2006-09-13 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Version 2.3a. - * configure.ac (AC_INIT): Likewise. - - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Remove - "#define YYSTYPE int" that caused "make maintainer-check" to fail - due to header ordering dependencies. I don't know why the #define - was there. - - Fix glr.cc and lalr1.cc's use of YYDEBUG so that there's zero - runtime cost when YYDEBUG is not defined, and so that some tests - that used to fail now work. Problem and initial suggestion by - Paolo Bonzini. - * data/c++.m4 (b4_parse_param_cons): Omit leading ','. - * data/glr.cc (b4_parser_class_name): - Initialize yycdebug_ only if YYDEBUG. Also, initialize yydebug_. - (debug_level, set_debug_level): Affect yydebug_, not ::yydebug. - (yydebug_) [YYDEBUG]: New member. - (yycdebug_): Now defined only if YYDEBUG. - * data/lalr1.cc (yydebug_, yycdebug_): Now defined only if YYDEBUG. - (YYCDEBUG) [!YYDEBUG]: Don't use yydebug_ and yycdebug_. - (b4_parser_class_name): Initialize yydebug_ and yycdebug_ only - if YYYDEBUG. - (debug_stream, set_debug_stream, debug_level, set_debug_level): - Define only if YYDEBUG. - * tests/calc.at (_AT_DATA_CALC_Y) [!YYDEBUG]: Omit call to - set_debug_level. - * tests/regression.at (_AT_DATA_DANCER_Y) [!YYDEBUG]: Likewise. - * tests/calc.at (AT_CHECK_CALC_GLR_CC): Uncomment calls to - AT_CHECK_CALC_GLR_CC that are working now. - -2006-09-12 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.cc (YYERROR_VERBOSE, YYTOKEN_TABLE): Remove. - We don't need them in glr.cc, and glr.c defines them. - Defining YYERROR_VERBOSE to 0 here breaks glr.c, since glr.c - assumes that defining it to anything is the same as defining - it to 1. Problem reported by Paolo Bonzini. - -2006-09-12 Paolo Bonzini <bonzini@gnu.org> (tiny change) - - * data/c.m4 (b4_null, b4_case): Define. - * src/output.c (prepare_symbols): Use b4_null. - (user_actions_output): Use b4_case. - -2006-09-11 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (b4_shared_declarations): Put start-header first, - before any #includes that we generate, so that feature-test - macros work. Problem reported by Michael Deutschmann in - <http://lists.gnu.org/archive/html/bug-bison/2006-09/msg00004.html>. - * data/lalr1.cc: Likewise. - * doc/bison.texinfo (Prologue): Document that feature-test macros - should be defined before any Bison declarations. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Put defns - that depend on location.hh after, not before, Bison decls, since - we now include location.hh after the first user prologue. - - * doc/bison.texinfo (Calc++ Parser): Fix memory leak reported by - Sander Brandenburg in - <http://lists.gnu.org/archive/html/bug-bison/2006-09/msg00002.html>. - Also, fix minor white space and comment issues. - (Prologue): Mention that it's better to define feature-test macros - before Bison declarations. Problem reported by Michael Deutschmann. - - * README-cvs: Fix typo: "&" should be "&&". Problem reported - by Jim Meyering. - * m4/.cvsignore: Add argmatch.m4. Remove obstack.m4, strerror_r.m4. - This adjusts to recent gnulib changes. - -2006-09-04 Joel E. Denny <jdenny@ces.clemson.edu> - - Finish implementation of per-type %destructor/%printer. Discussed - starting at - <http://lists.gnu.org/archive/html/bison-patches/2006-02/msg00064.html> - and - <http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00091.html>. - * NEWS (2.3+): Add a description of this feature to the default - %destructor/%printer description. - * doc/bison.texinfo (Freeing Discarded Symbols): Likewise. - * src/symlist.c (symbol_list_destructor_set, symbol_list_printer_set): - Invoke semantic_type_destructor_set or semantic_type_printer_set when a - list node contains a semantic type. - * src/symtab.c, src/symtab.h: Extend with a table that associates - semantic types with their %destructor's and %printer's. - (semantic_type_from_uniqstr, semantic_type_get, - semantic_type_destructor_set, semantic_type_printer_set): New functions - composing the public interface of that table. - (symbol_destructor_get, symbol_destructor_location_get, - symbol_printer_get, symbol_printer_location_get): If there's no - per-symbol %destructor/%printer, look up the per-type before trying - the default. - * tests/actions.at (Per-type %printer and %destructor): New test case. - * tests/input.at (Default %printer and %destructor redeclared): - Extend to check that multiple occurrences of %symbol-default in a - single %destructor/%printer declaration is an error. - (Per-type %printer and %destructor redeclared, Unused values with - per-type %destructor): New test cases. - -2006-09-04 Joel E. Denny <jdenny@ces.clemson.edu> - - Require default %destructor/%printer to be declared using - %symbol-default instead of an empty symbol list, and start working on - new per-type %destructor/%printer. Discussed at - <http://lists.gnu.org/archive/html/bison-patches/2006-09/msg00007.html>. - * NEWS (2.3+): Add %symbol-default to example. - * bison.texinfo (Freeing Discarded Symbols): Likewise. - (Table of Symbols): Add entry for %symbol-default. - * src/parse-gram.y (PERCENT_SYMBOL_DEFAULT): New token. - (generic_symlist, generic_symlist_item): New nonterminals for creating - a list in which each item is a symbol, semantic type, or - %symbol-default. - (grammar_declaration): Use generic_symlist in %destructor and %printer - declarations instead of symbols.1 or an empty list. - (symbol_declaration, precedence_declaration, symbols.1): Update actions - for changes to symbol_list. - * src/reader.c: Update for changes to symbol_list. - * src/scan-code.l: Likewise. - * src/scan-gram.l: Scan new PERCENT_SYMBOL_DEFAULT token. - * src/symlist.c, src/symlist.h: Extend such that a list node may - represent a semantic type or a %symbol-default in addition to just an - ordinary symbol. Add switched functions for setting %destructor's and - %printer's. - * tests/actions.at, tests/input.at: Add %symbol-default to all default - %destructor/%printer declarations. - -2006-08-23 Joel E. Denny <jdenny@ces.clemson.edu> - - Whether the default %destructor/%printer applies to a particular symbol - isn't a question of whether the user *declares* that symbol (in %token, - for example). It's a question of whether the user by any means - *defines* the symbol at all (by simply using a char token, for - example). $end is defined by Bison whereas any other token with token - number 0 is defined by the user. The error token is always defined by - Bison regardless of whether the user declares it with %token, but we - may one day let the user define error as a nonterminal instead. - * NEWS (2.3+): Say "user-defined" instead of "user-declared". - * doc/bison.texinfo (Freeing Discarded Symbols): Likewise, and document - the meaning of "user-defined". - * tests/actions.at (Default %printer and %destructor for user-declared - end token): Rename to... - (Default %printer and %destructor for user-defined end token): ... - this. - - * src/symtab.c (symbol_destructor_get, symbol_printer_get): In the - computation of whether to apply the default, don't maintain a list of - every Bison-defined symbol. Instead, just check for a first character - of '$', which a user symbol cannot have, and check for the error token. - -2006-08-21 Joel E. Denny <jdenny@ces.clemson.edu> - - Don't apply the default %destructor or %printer to the error token, - $undefined, or $accept. This change fits the general rule that the - default %destructor and %printer are only for user-declared symbols, - and it solves several difficulties that are described in the new test - cases listed below. - * src/symtab.c (symbol_destructor_get, symbol_printer_get): Implement. - * tests/actions.at (Default %printer and %destructor are not for error - or $undefined, Default %printer and %destructor are not for $accept): - New test cases. - -2006-08-19 Joel E. Denny <jdenny@ces.clemson.edu> - - Allow %start after the first rule. - * src/reader.c (grammar_current_rule_begin): Don't set the start symbol - when parsing the first rule. - (check_and_convert_grammar): Search for it here after all grammar - declarations have been parsed. Skip midrules, which have dummy LHS - nonterminals. - * src/symtab.c (symbol_is_dummy): New function. - * src/symtab.h (symbol_is_dummy): Declare it. - * tests/input.at (%start after first rule): New test. - -2006-08-18 Joel E. Denny <jdenny@ces.clemson.edu> - - Redo some of the previous commit: add back the ability to use - non-aliased/undeclared string literals since it might be useful to - those declaring %token-table. - * src/reader.c (check_and_convert_grammar): Undo changes in previous - commit: don't worry about complaints from symbols_pack. - * src/symtab.c (symbol_new, symbol_class_set, - symbol_check_alias_consistency): Undo changes in previous commit: count - each string literal as a new symbol and token, assign it a symbol - number, and don't complain about non-aliased string literals. - (symbols_pack): Since symbol_make_alias still does not decrement symbol - and token counts but does still set aliased tokens to the same number, - symbol_pack_processor now leaves empty slots in the symbols array. - Remove those slots. - * tests/regression.at (Undeclared string literal): Remove test case - added in previous commit since non-aliased string literals are allowed - again. - (Characters Escapes, Web2c Actions): Undo changes in previous commit: - remove unnecessary string literal declarations. - * tests/sets.at (Firsts): Likewise. - -2006-08-18 Joel E. Denny <jdenny@ces.clemson.edu> - - Don't allow an undeclared string literal, but allow a string literal to - be used before its declaration. - * src/reader.c (check_and_convert_grammar): Don't invoke packgram if - symbols_pack complained. - * src/symtab.c (symbol_new): Don't count a string literal as a new - symbol. - (symbol_class_set): Don't count a string literal as a new token, and - don't assign it a symbol number since symbol_make_alias does that. - (symbol_make_alias): It's not necessary to decrement the symbol and - token counts anymore. Don't assume that an alias declaration occurs - before any uses of the identifier or string, and thus don't assert that - one of them has the highest symbol number so far. - (symbol_check_alias_consistency): Complain if there's a string literal - that wasn't declared as an alias. - (symbols_pack): Bail if symbol_check_alias_consistency failed since - symbol_pack asserts that every token has been assigned a symbol number - although undeclared string literals have not. - * tests/regression.at (String alias declared after use, Undeclared - string literal): New test cases. - (Characters Escapes, Web2c Actions): Declare string literals as - aliases. - * tests/sets.at (Firsts): Likewise. - -2006-08-14 Joel E. Denny <jdenny@ces.clemson.edu> - - In the grammar scanner, STRING_FINISH unclosed constructs and return - them to the parser in order to improve error messages. - * src/scan-gram.l (SC_ESCAPED_STRING, SC_ESCAPED_CHARACTER, - SC_BRACED_CODE, SC_PROLOGUE): Implement. - * tests/input.at (Unclosed constructs): New test case. - * tests/regression.at (Invalid inputs): Update now that unclosed %{ is - seen. - - * src/scan-gram.h, src/scan-gram.l (gram_last_braced_code_loc): Remove - unused global. - -2006-08-13 Joel E. Denny <jdenny@ces.clemson.edu> - - Handle string aliases for character tokens correctly. - * src/symtab.c (symbol_user_token_number_set): If the token has an - alias, check and set its alias's user token number instead of its own, - which is set to indicate the alias. Previously, every occurrence of - the character token in the grammar overwrote that alias indicator with - the character code. - * tests/input.at (String aliases for character tokens): New test. - -2006-08-12 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/parse-gram.y: Add `%expect 0' so we don't overlook conflicts. - -2006-08-11 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap: Put in need-ngettext argument to AM_GNU_GETTEXT, - to prevent failures when building on older platforms. - Check for autopoint failure. - Set XGETTEXT_OPTIONS to values that check for C format strings, - so that translators are warned about them (this also helps - prevent core dumps). - - * lib/subpipe.c (create_subpipe): Use new gnulib pipe_safer - function, since it simplifies our code a bit. - - * configure.ac (AC_ARG_ENABLE): Use -Wextra -Wno-sign-compare - rather than -W, so we don't get bogus warnings about sign comparisons. - Add -Wpointer-arith, since that warning is useful (it reports code - that does not conform to C89 and that some compilers reject). - * data/c.m4, data/glr.c, data/lalr1.cc, data/yacc.c: Undo latest change, - since it's no longer needed. - -2006-08-10 Joel E. Denny <jdenny@ces.clemson.edu> - - Clean up scanners a bit. - * src/flex-scanner.h (FLEX_NO_OBSTACK): New macro that blocks obstack - definitions so gcc won't warn when obstack_for_string is unused. - * src/scan-code.l: config.h and system.h are already #include'd by - scan-code-c.c, so get rid of them here. - * src/scan-gram.l: Likewise. - * src/scan-skel.l: Likewise, and use flex-scanner.h without obstack - definitions rather than duplicating the rest of it. - * src/scan-gram-c.c, scan-skel-c.c: #include "system.h". - -2006-08-09 Joel E. Denny <jdenny@ces.clemson.edu> - - Suppress signed/unsigned comparison warnings for yycheck. - * data/c.m4 (b4_safest_int_type): New macro. - * data/glr.c, data/lalr1.cc: Wherever you compare yycheck[i] against - a signed int type, cast it to b4_safest_int_type first. - * data/yacc.c: Likewise. - (b4_safest_int_type): Overwrite the one from c.m4 since b4_int_type is - also overwritten. - -2006-08-09 Ralf Wildenhues <Ralf.Wildenhues@gmx.de> (tiny change) - - * doc/bison.texinfo: Fix some typos. - -2006-08-02 Paul Eggert <eggert@cs.ucla.edu> - - * m4/.cvsignore: Add inttypes_h.m4,lib-ld.m4, lib-prefix.m4, - po.m4, stdint_h.m4, uintmax_t.m4, ulonglong.m4, warning.m4. - - * bootstrap (gnulib_tool): Stop using --assume-autoconf; - the latest gnulib does this a different way. - (get_translations): Sharuzzaman Ahmat Raslan reported that the ms - translation was patched, so stop omitting it. - -2006-07-29 Joel E. Denny <jdenny@ces.clemson.edu> - - Enable declaration of default %printer/%destructor. Make the parser - use these for all user-declared grammar symbols for which the user does - not declare a specific %printer/%destructor. Thus, the parser uses it - for token 0 if the user declares it but not if Bison generates it as - $end. Discussed starting at - <http://lists.gnu.org/archive/html/bison-patches/2006-02/msg00064.html>, - <http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00091.html>, - and - <http://lists.gnu.org/archive/html/bison-patches/2006-07/msg00019.html>. - * NEWS (2.3+): Mention. - * doc/bison.texinfo (Actions in Mid-Rule): It's no longer impossible to - declare a %destructor for a mid-rule's semantic value. It's just - impossible to declare one specific to it. - (Freeing Discarded Symbols): Mention that @$ can be used in %destructor - code. Describe default %destructor form. - * src/parse-gram.y (grammar_declaration): Parse default - %printer/%destructor declarations. - * src/output.c (symbol_destructors_output): Use symbol_destructor_get - and symbol_destructor_location_get rather than accessing the destructor - and destructor_location members of struct symbol. - (symbol_printers_output): Likewise but for %printer's. - * src/reader.c (symbol_should_be_used): Likewise but for %destructor's - again. - * src/symtab.c (default_destructor, default_destructor_location, - default_printer, default_printer_location): New static global - variables to record the default %destructor and %printer. - (symbol_destructor_get, symbol_destructor_location_get, - symbol_printer_get, symbol_printer_location_get): New functions to - compute the appropriate %destructor and %printer for a symbol. - (default_destructor_set, default_printer_set): New functions to set the - default %destructor and %printer. - * src/symtab.h: Prototype all those new functions. - * tests/actions.at (Default %printer and %destructor): New test to - check that the right %printer and %destructor are called, that they're - not called for $end, and that $$ and @$ work correctly. - (Default %printer and %destructor for user-declared end token): New - test to check that the default %printer and %destructor are called for - a user-declared end token. - * tests/input.at (Default %printer and %destructor redeclared, Unused - values with default %destructor): New tests to check related grammar - warnings and errors. - -2006-07-29 Joel E. Denny <jdenny@ces.clemson.edu> - - Clean up handling of %destructor for the end token (token 0). - Discussed starting at - <http://lists.gnu.org/archive/html/bison-patches/2006-07/msg00019.html> - and - <http://lists.gnu.org/archive/html/help-bison/2006-07/msg00013.html>. - - Make the skeletons consistent in how they pop the end token and invoke - its %destructor. - * data/glr.c (yyrecoverSyntaxError, yyparse): Don't pop the start - state, which has token number 0, since this would invoke the - %destructor for the end token. - * data/lalr1.cc (yy::parser::parse): Don't check for the final state - until after shifting the end token, or else it won't be popped. - * data/yacc.c (yyparse): Likewise. - - * data/glr.c (yyparse): Clear the lookahead after shifting it even when - it's the end token. Upon termination, destroy an unshifted lookahead - even when it's the end token. - * data/lalr1.cc (yy::parser::parse): Likewise. - * data/yacc.c (yyparse): Likewise. - - * src/reader.c (packgram): Don't check rule 0. This suppresses unused - value warnings for the end token when the user gives the end token a - %destructor. - - * tests/actions.at (Printers and Destructors): Test all the above. - -2006-07-24 Paul Eggert <eggert@cs.ucla.edu> - - Update to latest gnulib and gettext versions. - * bootstrap (gnulib-modules): Remove hard-locale, stdio-safer. - Add fopen-safer. - (gnulib_files): Add m4/warning.m4. Don't worry about files - overwritten by autopoint. - Replace gt_INTL_SUBDIR_CORE with an empty body in m4/gettext_gl.m4. - Suppress "id", "ms", "tr" translations for now, since gettext 0.15 - rejects them. - Don't use autoreconf; instead, invoke autopoint etc. by hand, - so that we can remove the intl files at a better time. - (intl_files_to_remove): Remove aclocal.m4, since it gets - rebuilt anyway. Remove m4/inttypes_h.m4, m4/inttypes.m4, - m4/isc-posix.m4, m4/lib-ld.m4, m4/lib-prefix.m4, m4/po.m4, - m4/stdint_h.m4, m4/uintmax_t.m4, m4/ulonglong.m4. - Add m4/inttypes-h.m4, m4/lock.m4, m4/visibility.m4. - Remove datarootdir hack; no longer needed. - * configure.ac: Use gl_WARNING_CFLAGS rather than BISON_WARNING. - (AM_GNU_GETTEXT_VERSION): Bump from 0.12 to 0.15. - * lib/.cvsignore: Remove hard-locale.c, hard-locale.h, strdup.c, - strdup.h. - * m4/.cvsignore: Remove hard-locale.m4, strdup.m4. - * m4/warning.m4: Remove from CVS, since we now use gnulib's version. - -2006-07-20 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap: Adjust to today's change to gnulib-tool by invoking - it with --assume-autoconf='latest-stable'. - -2006-07-13 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/parse-gram.y (grammar_declaration): Don't confuse Doxygen (at - least 1.4.7 and 1.4.4) by putting a #line between `typedef union - YYSTYPE' and `{'. - * src/muscle_tab.h (muscle_grow): Replace the header comments with - those from muscle_tab.c since the old ones are misleading. - -2006-07-13 Akim Demaille <akim@epita.fr> - - Support %define "KEY" {VALUE}. - * src/scan-code.h, src/scan-code.l (translate_action) - (translate_rule_action, translate_symbol_action, translate_code): - Return char *, not const char *. - * src/parse-gram.y (declaration): Rename as... - (prologue_declaration): this. - (string_content): Remove this nonterminal, use STRING. - (braceless, content, content.opt): New nonterminal. - Use them. - (%define): Now accept content.opt, i.e., accept also BRACED_CODE - as value. - * src/scan-gram.l (getargs.h): Don't include it. - -2006-07-12 Paul Eggert <eggert@cs.ucla.edu> - - * data/lalr1.cc (YYCDEBUG): Use 'if (yydebug_) (*yycdebug_)' - rather than a for-loop that declares a local bool variable. This - should work around a compatibility problem with a Cray x1e C++ - compiler reported by Hung Nguyen in - <http://lists.gnu.org/archive/html/help-bison/2006-07/msg00022.html>. - The for-loop was introduced in the 2004-11-17 change but I don't - know why it was needed. - -2006-07-12 Akim Demaille <akim@epita.fr> - - * data/c.m4: Comment changes. - -2006-07-10 Akim Demaille <akim@lrde.epita.fr> - - * src/complain.c (error_message, ERROR_MESSAGE): New. - To factor... - (fatal_at, fatal, warn_at, warn, complain_at, complain): these. - * src/complain.h, src/complain.c (warning_issued): Remove, unused. - -2006-07-09 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Instead of %union, you can define and use your own union type - YYSTYPE if your grammar contains at least one <type> tag. - Your YYSTYPE need not be a macro; it can be a typedef. - * doc/bison.texinfo (Value Type, Multiple Types, Location Type): - (Union Decl, Decl Summary): Document this. - * data/glr.c (YYSTYPE): Implement this. - * data/glr.cc (YYSTYPE): Likewise. - * data/lalr1.cc (YYSTYPE): Likewise. - * data/yacc.c (YYSTYPE): Likewise. - * src/output.c (prepare): Output tag_seen_flag. - * src/parse-gram.y (declaration, grammar_declaration): - Use 'union_seen' rather than 'typed' to determine whether - %union has been seen, since grammars can now be typed without - %union. - (symbol_declaration, type.opt, symbol_def): - Keep track of whether a tag has been seen. - * src/reader.c (union_seen, tag_seen): New vars. - (typed): remove. - * src/reader.h (union_seen, tag_seen, typed): Likewise. - * src/scan-code.l (untyped_var_seen): New variable. - (handle_action_dollar): Adjust to above changes. - (handle_action_dollar, handle_action_at): - Improve overflow checking for outlandish numbers. - * tests/input.at (AT_CHECK_UNUSED_VALUES): Redo test to - avoid new diagnostics generated by above changes. - * tests/regression.at (YYSTYPE typedef): Add test to check - for type tags without %union. - - * src/symlist.c (symbol_list_length): Return int, not unsigned - int, since callers expect int. This may need to get revisited - once we have proper integer overflow checking. - - * src/scan-gram.h (gram_scanner_cursor): Remove decl, since this - object is now static. - - * src/getargs.c (flags_argmatch): Return void, not int, - to pacify ./configure --enable-gcc-warnings. - - * src/flex-scanner.h (STRING_FREE): Don't use FLEX_PREFIX (last_string) - since last_string is already defined to FLEX_PREFIX (last_string). - -2006-07-09 Akim Demaille <akim@lrde.epita.fr> - - Implement --warnings/-W. - * src/getargs.c (report_argmatch, trace_argmatch): Remove, - replaced by... - (flags_argmatch, FLAGS_ARGMATCH): this new function and macro. - Adjust callers. - * src/getargs.h, src/getargs.c (warnings, warnings_flags) - (warnings_args, warnings_types): New. - (getargs, short_options, long_options): Accept -W/--warnings. - Sort the options by alphabetical order, upper case letter right - before its lower case. - -2006-07-09 Joel E. Denny <jdenny@ces.clemson.edu> - - Change %merge result type clash warnings to errors. Discussed at - <http://lists.gnu.org/archive/html/bison-patches/2006-07/msg00026.html>. - * src/reader.c (record_merge_function_type): Use complain_at. - * tests/glr-regression.at (Missed %merge type warnings when LHS type is - declared later): Update test case results. - -2006-07-09 Akim Demaille <akim@lrde.epita.fr> - - * src/getargs.h, src/getargs.c: Swap --report and --trace handling - to be in alphabetical order. - (trace_args): Spelling fixes. - -2006-07-09 Paul Eggert <eggert@cs.ucla.edu> - - * data/yacc.c (YYID, yy_stack_print): Prefix local vars with "yy" - so they don't collide with user-defined macros. - (yy_stack_print): Don't assume that yytype_int16 promotes to int; - this was never guaranteed, and now that we're using gnulib stdint, - which defines int_fast16_t to long int, the problem is exposed. - -2006-07-08 Paul Eggert <eggert@cs.ucla.edu> - - * data/c.m4 (b4_basename): Simplify a bit, since we don't - need the full POSIX semantics (and weren't implementing them - anyway). - - Adjust to Autoconf 2.60 and today's gnulib. - * bootstrap (gnulib_modules): Add stdint. - Remove special case for m4/onceonly_2_57.m4, since gnulib-tool - no longer copies it. - (intl_files_to_remove): Remove m4/longlong.m4 and m4/wchar_t.m4, - since stdint needs the former and wcwidth (which is now required - by mbswidth) needs the latter. - Append 'datarootdir = @datarootdir@' to po/Makefile.in.in, to - work around a compatibility glitch between gettext 0.14.6 and - Autoconf 2.60. - * configure.ac (AC_PREREQ): Require Autoconf 2.60. - Do not check for uintptr_t, since new stdint module does the right - thing. - * lib/.cvsignore: Remove alloca.c, alloca.h, alloca_.h. - Add stdint.h, stdint_.h, wcwidth.h. - * m4/.cvsignore: Remove alloca.m4, onceonly.m4. - Add absolute-header.m4, double-slash-root.m4, longlong.m4, - stdint.m4, wchar_t.m4, wcwidth.m4. - * src/files.c: Include <dirname.h> and <stdio-safer.h> in the - usual order for ../lib/*.h files. - (file_name_split): Use last_component, not base_name, to adjust - to gnulib changes. - * src/parse-gram.h: Include <strverscmp.h> in the usual order - for ../lib/*.h files. - (YYTYPE_INT16, YYTYPE_INT8, YYTYPE_UINT16, YYTYPE_UINT8): - Define unconditionally, since we now assume the stdint module. - * src/scan-skel.l: Include <dirname.h>. - (BASE_QPUTS): Use last_component, not base_name. - * src/system.h: Include <unlocked-io.h> in the usual order - for ../lib/*.h files. Include <stdint.h> unconditionally, - since we now use the stdint module. - (uintptr_t): Declare if UINTPTR_MAX is not defined, not - HAVE_UINTPTR_T, since we now use the stdint module. - (base_name): Remove decl, since files now include <dirname.h> - to get the decl. - -2006-07-08 Akim Demaille <akim@lrde.epita.fr> - - * data/c.m4 (b4_location_initial_column, b4_location_initial_line): - New, default to 1. - * data/yacc.c, data/glr.c, data/location.cc: Use them. - * NEWS, doc/bison.texinfo: The initial column and line are 1 by - default. - * tests/calc.at: Adjust. - -2006-07-08 Akim Demaille <akim@lrde.epita.fr> - - * data/c.m4 (b4_basename): New. - (b4_syncline): Also output the location of its invocation (from - the skeleton). - (b4_user_action, b4_define_user_action, b4_user_actions) - (b4_user_initial_action, b4_user_post_prologue, b4_user_start_header) - (b4_user_stype): New. - * data/yacc.c, data/glr.c, data/lalr1.cc, data/glr.cc: Use them. - -2006-07-07 Joel E. Denny <jdenny@ces.clemson.edu> - - In the grammar file, the first column is 1 not 0 on the first line as - on every other line. - * src/parse-gram.y (%initial-action): Initialize @$ correctly. - * tests/input.at (Torturing the Scanner): Update output. - - * src/scan-gram.l (scanner_cursor): Declare it static. - -2006-07-07 Joel E. Denny <jdenny@ces.clemson.edu> - - In warnings, say "previous declaration" rather than "first - declaration". - * src/symtab.c (redeclaration): Do that here. - * src/reader.c (record_merge_function_type): In the case of a result - type clash, report the previous declaration rather than the very first - one in the grammar file. - * tests/glr-regression.at (Missed %merge type warnings when LHS type is - declared later): Add a third declaration to check this behavior. - * tests/input.at (Incompatible Aliases): Update output. - -2006-06-27 Akim Demaille <akim@epita.fr> - - * doc/Doxyfile.in: New. - * doc/Makefile.am: Use it. - * src/lalr.h, src/symtab.h: Initial doxygenation. - -2006-06-26 Joel E. Denny <jdenny@ces.clemson.edu> - - Don't miss %merge result type warnings just because the LHS types are - declared after the %merge. This continues the effort of the previous - patch. - * src/reader.c (get_merge_function): Don't set the merger type yet. - (record_merge_function_type): New function for setting the merger type - and checking for clashes. - (grammar_current_rule_merge_set): Set the location of the %merge for - the current rule. - (packgram): Invoke record_merge_function_type for each rule now that - all symbol type declarations have been parsed. - * src/reader.h (merger_list.type_declaration_location): New member - storing the location of the first %merge from which the type for this - merging function was derived. - * src/symlist.h (symbol_list.merger_declaration_location): New member - storing the location of a rule's %merge, if any. - * tests/glr-regression.at (Missed %merge type warnings when LHS type is - declared later): New test to catch the error fixed by the above patch. - -2006-06-26 Joel E. Denny <jdenny@ces.clemson.edu> - - Get action warnings (grammar_rule_check) right even when symbol - declarations appear after the rules. Discussed at - <http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00108.html> - and - <http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00151.html>. - Don't mistake the type of $$ in a midrule to be that of its parent - rule's $$. - * src/reader.c (grammar_current_rule_end): Don't invoke - grammar_rule_check yet since not all symbol declarations may have been - parsed yet. - (grammar_midrule_action): Likewise. - Don't record whether the midrule's $$ has been used yet since actions - haven't been translated yet. - Record the midrule's parent rule and its RHS index within the parent - rule. - (grammar_current_rule_action_append): Don't translate the action yet - since not all symbol declarations may have been parsed yet and, thus, - warnings about types for $$, $n, @$, and @n can't be reported yet. - (packgram): Translate the action and invoke grammar_rule_check now that - all symbol declarations have been parsed. - * src/scan-code.l (handle_action_dollar): Now that this is invoked - after parsing the entire grammar file, the symbol list here in the case - of a midrule is actually the midrule's empty RHS, so reference its - parent rule's RHS where necessary. - On the other hand, now that you can already know it's a midrule, you - aren't forced to think $$ has the same type as its parent rule's $$. - (handle_action_at): In the case of a midrule, reference the parent rule - where necessary. - * src/symlist.c (symbol_list_new): Initialize new midrule-related - members. - (symbol_list_length): Now that this is invoked after all rules have - been parsed, a NULL symbol (rather than a NULL symbol list node) - terminates a rule. symbol_list_print already does this correctly. - * src/symlist.h (symbol_list.midrule_parent_rule, - symbol_list.midrule_parent_rhs_index): New members so that midrules can - remember their relationships with their parents. - * tests/input.at (Type Clashes): Extend to catch the midrule $$ error - fixed by the above patch. - (_AT_UNUSED_VALUES_DECLARATIONS, AT_CHECK_UNUSED_VALUES): New m4 macros - implementing... - (Unused values): ... this old test case and... - (Unused values before symbol declarations): ... this new test case. - This one is the same as `Unused values' except that all symbol - declarations appear after the rules in order to catch the rest of the - errors fixed by the above patch. - -2006-06-26 Joel E. Denny <jdenny@ces.clemson.edu> - - More cleanup. - * src/reader.c (current_rule): Declare it static since it's no longer - used outside this file. - (grammar_current_rule_action_append): Remove redundant arguments from - translate_rule_action invocation. - * src/reader.h (current_rule): Remove this unused extern. - * src/scan-code.h (translate_rule_action): Remove redundant arguments. - * src/scan-code.l (translate_rule_action): Likewise. - -2006-06-25 Joel E. Denny <jdenny@ces.clemson.edu> - - Clean up yesterday's patch. - * parse-gram.y (rhs): Move grammar_midrule_action invocation from here - to... - * src/reader.c (grammar_current_rule_action_append): ... here for - consistency with grammar_current_rule_symbol_append. - * tests/regression.at (Braced code in declaration in rules section): - Make yyerror and yylex static as usual. - -2006-06-24 Joel E. Denny <jdenny@ces.clemson.edu> - - Fix bug that mistakes braced code in a declaration in the rules section - to be a rule action. Mentioned at - <http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00105.html>. - * src/scan-gram.l: Move midrule action detection from the start of the - scanning of any braced code to... - * src/parse-gram.y (rhs): ... the parsing of braced code as a rule - action. For readability, use $2 and @2 rather than the equivalent - global variables. - * tests/regression.at (Braced code in declaration in rules section): - New test to catch the error fixed by the above patch. - - Work on code readability some. - * src/scan-code.l (current_rule): Get rid of this misleading and - redundant declaration: it's actually extern'ed in reader.h. - (YY_DECL, code_lex, handle_action_dollar, handle_action_at, - translate_action): Add a rule argument and use it instead of the global - current_rule. - (translate_rule_action): This already receives current_rule through an - argument, so pass it on to translate_action instead of assigning - current_rule to current_rule. - (translate_symbol_action, translate_code): Pass rule = NULL to - translate_action. - -2006-06-23 Joel E. Denny <jdenny@ces.clemson.edu> - - Rename %before-definitions to %start-header and %after-definitions to - %end-header. Don't use these declarations to separate pre-prologue - blocks from post-prologue blocks. Add new order-independent - declarations %before-header and %after-header as alternatives to the - traditional Yacc pre-prologue and post-prologue blocks. Discussed at - <http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00110.html>. - * NEWS (2.3+): Update for these changes. - * data/glr.c (b4_before_definitions): Update to... - (b4_start_header): ... this. - (b4_after_definitions): Update to... - (b4_end_header): ... this. - * data/glr.cc: Likewise. - * data/lalr1.cc: Likewise. - * data/yacc.c: Likewise. - * doc/bison.texinfo (The prologue): Update names, and replace remaining - prologue blocks with %*-header declarations. - (Calc++ Parser): Likewise. - (Decl Summary): Update names. - (Table of Symbols): Update description. - * src/parse-gram.y (PERCENT_AFTER_DEFINITIONS): Update to... - (PERCENT_END_HEADER): ... this. - (PERCENT_BEFORE_DEFINITIONS): Update to... - (PERCENT_START_HEADER): ... this. - (PERCENT_AFTER_HEADER, PERCENT_BEFORE_HEADER): New tokens. - (declaration): Update token names and m4 macro names. - When parsing %end-header and %start-header, invoke translate_code - before muscle_code_grow, and no longer set global booleans to remember - whether these declarations have been seen. - Parse new %after-header and %before-header. - * src/reader.c (before_definitions, after_definitions): Remove. - (prologue_augment): Accept a new bool argument to specify whether to - augment the pre-prologue or post-prologue. - * src/reader.h (before_definitions, after_definitions): Remove these - extern's. - (prologue_augment): Add new bool argument. - * src/scan-gram.l (PERCENT_AFTER_DEFINITIONS): Update to... - (PERCENT_END_HEADER): ... this. - (PERCENT_BEFORE_DEFINITIONS): Update to... - (PERCENT_START_HEADER): ... this. - (PERCENT_AFTER_HEADER, PERCENT_BEFORE_HEADER): New tokens. - * tests/actions.at (Printers and Destructors): Update names. - -2006-06-22 Joel E. Denny <jdenny@ces.clemson.edu> - - Add comparison operators for C++ location classes. Discussed at - <http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00092.html>. - * data/c++.m4 (b4_define_location_comparison): New boolean %define - declaration indicating whether filename_type has an operator==. If - filename_type is `std::string', it defaults to `1', `0' otherwise. - * data/location.cc: Iff b4_define_location_comparison is `1', add - operator== and operator!= for class position and for class location. - - Some minor fixes. - * src/scan-action.l: Remove unused file. - * src/symtab.c (symbol_printer_set): Use printer_location not - destructor_location. - * src/symtab.h (struct symbol): Replace incorrect source comment for - printer members. - * tests/input.at (Incompatible Aliases): Update output with correct - printer location. - -2006-06-20 Joel E. Denny <jdenny@ces.clemson.edu> - - Don't put the pre-prologue in the header file. For the yacc.c code - file and the glr.c header and code files, move the pre-prologue before - the token definitions. Add new %before-definitions and - %after-definitions to declare code that will go in both the header file - and code file. Discussed at - <http://lists.gnu.org/archive/html/bison-patches/2005-12/msg00000.html>, - <http://lists.gnu.org/archive/html/bison-patches/2006-01/msg00016.html>, - and - <http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00055.html>. - * NEWS (2.3+): Describe these changes. - * data/glr.c (b4_pre_prologue): Move from within to before... - (b4_shared_declarations): ... this. - Add new b4_before_definitions before b4_token_enums. - Add new b4_after_definitions at the end. - * data/glr.cc (b4_pre_prologue): Replace with... - (b4_before_definitions): ... this in the header file. - (b4_after_definitions): New near the end of the header file. - * data/lalr1.cc (b4_pre_prologue): Move from the header file to the - code file right before including the header file. - (b4_before_definitions): New in the previous position of - b4_pre_prologue in the header file. - (b4_after_definitions): New near the end of the header file. - * data/yacc.c: Clean up some m4 quoting especially in the header file. - (b4_token_enums_defines): In the code file, move to right before - YYSTYPE for consistency with the header file. - (b4_before_definitions): New right before b4_token_enums_defines in - both the header and code file. - (b4_after_definitions): New right after YYLTYPE and yylloc in both the - header and code file. - * doc/bison.texinfo (Prologue): Show use of %before-definitions instead - of prologues for %union dependencies. - (Decl Summary): In %defines description, mention the effect of - %before-definitions and %after-definitions on the header file. - (Calc++ Parser): Forward declare driver in a %before-definitions rather - than in the pre-prologue so that make check succeeds. - (Table of Symbols): Add entries for %before-definitions and - %after-definitions. - * src/parse-gram.y (PERCENT_BEFORE_DEFINITIONS): New token for - %before-definitions. - (PERCENT_AFTER_DEFINITIONS): New token for %after-definitions. - (declaration): Parse those declarations and append to - b4_before_definitions and b4_after_definitions, respectively. - * src/reader.c (before_definitions, after_definitions): New bools to - track whether those declarations have been seen. - (prologue_augment): Add to the post-prologue if %union, - %before-definitions, or %after-definitions has been seen. - * src/reader.h (before_definitions, after_definitions): New extern's. - * src/scan-gram.l: Scan the new declarations. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Place the second - prologue block in a %before-definitions or a %after-definitions based - on whether the %union is declared. - * tests/regression.at (Early token definitions with --yacc, Early token - definitions without --yacc): Move tests for token definitions into the - post-prologue since token names are no longer defined in the - pre-prologue. - -2006-06-20 Akim Demaille <akim@epita.fr> - - * src/symtab.h, src/symtab.c (symbol_from_uniqstr): New. - (symbol_get): Use it. - * src/parse-gram.y: Use it. - -2006-06-19 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/scan-gram.l: Remove unused declaration of last_string_1 so the - build succeeds when configured with --enable-gcc-warnings. - -2006-06-19 Paul Eggert <eggert@cs.ucla.edu> - - * src/parse-gram.y (char_name): New function. - (CHAR, STRING, string_content): For %printer, properly escape. - (ID): Prefer fputs to fprintf. - (id): Reindent to be consistent with other rules. - Properly quote char. - - The Translation Project changed its way of publishing translations - to maintainers. I haven't received any responses to my request - for supporting the old way, or for documenting the new way. I - have modified 'bootstrap' to use screen scraping - (in this case, HTML scraping). This is unreliable and inelegant, - but I don't see any better way. Yuck. - * bootstrap (TP_URL, WGET_COMMAND): New vars. - (get_translations): New function, which uses HTML scraping to - deduce locations of latest translations. - Use this function to grab both bison and bison-runtime .po files. - Don't bother priming the pump for the runtime-po domain any more, - as it's now translated better than bison is. - -2006-06-19 Akim Demaille <akim@epita.fr> - - * src/scan-gram.l: No longer "parse" things after `%union' until - `{'. Rather, return a single "%union" token. - No longer make symbols: return strings, and leave the conversion - to symbols to the parser. - (SC_PRE_CODE, token_type): Remove. - * src/parse-gram.y (%union): New field `character'. - Sort tokens. - (CHAR): New token. - (ID, ID_COLON): Now that the scanner no longer makes them - identifiers, adjust all uses to invoke symbol_get. - (id_colon): New, wraps the conversion from string to symbol. - (%union): Accept a possible union_name. - (symbol): Now can be a char. - * data/c.m4 (b4_union_name): Leave a default value. - * data/glr.c, data/yacc.c: Use it. - -2006-06-11 Joel E. Denny <jdenny@ces.clemson.edu> - - For associating token numbers with token names for "yacc.c", don't use - #define statements unless `--yacc' is specified; always use enum - yytokentype. Most important discussions start at: - <http://lists.gnu.org/archive/html/bison-patches/2005-09/msg00053.html>, - <http://lists.gnu.org/archive/html/bison-patches/2005-12/msg00052.html>, - and - <http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00043.html>. - * NEWS (2.3+): Mention. - * data/c.m4 (b4_yacc_if): New. - (b4_token_enums_defines): Use b4_yacc_if to decide whether to add the - token #define's. - * doc/bison.texinfo (Bison Options): Describe the effect of `--yacc' - on token name definitions. - * src/getargs.c (usage): Capitalize `Yacc' in English. - * src/output.c (prepare): Define b4_yacc_flag. - * tests/regression.at (Early token definitions): Test that tokens names - are defined before the pre-prologue not just before the post-prologue. - Remove this test case and copy to... - (Early token definitions with --yacc): ... this to test #define's. - (Early token definitions without --yacc): ... and this to test enums. - -2006-06-11 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Reword the post-2.3 change to not be so optimistic about - removing the old "look-ahead" spelling. - Update previous look-ahead/lookahead change reports. - * REFERENCES: look-ahead -> lookahead (since that's - what he actually wrote). - * doc/refcard.tex: look ahead -> lookahead, - look-ahead -> lookahead - -2006-06-09 Joel E. Denny <jdenny@ces.clemson.edu> - - For consistency, use `lookahead' instead of `look-ahead' or - `look_ahead'. Discussed starting at - <http://lists.gnu.org/archive/html/bison-patches/2006-01/msg00049.html> - and then at - <http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00017.html>. - * NEWS: For the next release, note the change to `--report'. - * TODO, doc/bison.1: Update English. - * doc/bison.texinfo: Update English. - (Understanding Your Parser, Bison Options): Document as - `--report=lookahead' rather than `--report=look-ahead'. - * src/conflicts.c: Update English in comments. - (lookahead_set): Rename from look_ahead_set. - (flush_reduce): Rename argument look_ahead_tokens to lookahead_tokens. - (resolve_sr_conflict): Rename local look_ahead_tokens to - lookahead_tokens, and update other uses. - (flush_shift, set_conflicts, conflicts_solve, count_sr_conflicts, - count_rr_conflicts, conflicts_free): Update uses. - * src/getargs.c (report_args): Move "lookahead" before alternate - spellings. - (report_types): Update uses. - (usage): For `--report' usage description, state `lookahead' spelling - rather than `look-ahead'. - * src/getargs.h (report.report_lookahead_tokens): Rename from - report_look_ahead_tokens. - * src/lalr.c: Update English in comments. - (compute_lookahead_tokens): Rename from compute_look_ahead_tokens. - (state_lookahead_tokens_count): Rename from - state_look_ahead_tokens_count. - Rename local n_look_ahead_tokens to n_lookahead_tokens. - (lookahead_tokens_print): Rename from look_ahead_tokens_print. - Rename local n_look_ahead_tokens to n_lookahead_tokens. - Update other uses. - Update English in output. - (add_lookback_edge, initialize_LA, lalr, lalr_free): Update uses. - * src/print.c: Update English in comments. - (lookahead_set): Rename from look_ahead_set. - (print_reduction): Rename argument lookahead_token from - look_ahead_token. - (print_core, state_default_rule, print_reductions, print_results): - Update uses. - * src/print_graph.c: Update English in comments. - (print_core): Update uses. - * src/state.c: Update English in comments. - (reductions_new): Update uses. - (state_rule_lookahead_tokens_print): Rename from - state_rule_look_ahead_tokens_print, and update other uses. - * src/state.h: Update English in comments. - (reductions.lookahead_tokens): Rename from look_ahead_tokens. - (state_rule_lookahead_tokens_print): Rename from - state_rule_look_ahead_tokens_print. - * src/tables.c: Update English in comments. - (conflict_row, action_row): Update uses. - * tests/glr-regression.at - (Incorrect lookahead during deterministic GLR, - Incorrect lookahead during nondeterministic GLR): Rename - print_look_ahead to print_lookahead. - * tests/torture.at: Update English in comments. - (AT_DATA_LOOKAHEAD_TOKENS_GRAMMAR): Rename from - AT_DATA_LOOK_AHEAD_TOKENS_GRAMMAR. - (Many lookahead tokens): Update uses. - * data/glr.c: Update English in comments. - * lalr1.cc: Likewise. - * yacc.c: Likewise. - * src/conflicts.h: Likewise. - * src/lalr.h: Likewise. - * src/main.c: Likewise. - * src/output.c: Likewise. - * src/parse-gram.c: Likewise. - * src/tables.h: Likewise. - * tests/calc.at: Likewise. - -2006-06-08 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/flex-scanner.h (yytext): Remove stray `*/' in #define. - -2006-06-07 Paul Eggert <eggert@cs.ucla.edu> - - * TODO: Add request from Nelson H. F. Beebe to be able to install - Bison without installing the yacc script. - -2006-06-07 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/flex-scanner.h: For the sake of Flex 2.5.4, don't #define yyleng - and yytext if they're already #define'd. - * src/flex-scanner.h, src/location.h: Move #include "system.h" to... - * src/scan-code-c.c: ... here. - * src/scan-code.l, src/scan-gram.l: ... and here. Also #include - <config.h>. - -2006-06-07 Joel E. Denny <jdenny@ces.clemson.edu> - - Get Bison to build again when configured with --enable-gcc-warnings. - * src/location.c, src/location.h, src/main.c, src/scan-code.l: Add some - missing #include's. - * src/scan-code.l (handle_action_dollar, handle_action_at): Rename - loc argument as it shadows a global. - * src/scan-gram.l: Remove stray comma that prevents boundary_set - invocation. - - * src/.cvsignore: Add scan-code.c. - -2006-06-07 Akim Demaille <akim@epita.fr> - - * src/scan-gram.l: Move the "add a trailing ; to actions" code - to... - * src/scan-code.l: here. - * tests/input.at (Torturing the Scanner): Fix another location - error. - -2006-06-07 Akim Demaille <akim@epita.fr> - - * src/Makefile.am (BUILT_SOURCES): Fix the trailing backslash. - -2006-06-06 Akim Demaille <akim@epita.fr> - - Extract the parsing of user actions from the grammar scanner. - As a consequence, the relation between the grammar scanner and - parser is much simpler. We can also split "composite tokens" back - into simple tokens. - * src/gram.h (ITEM_NUMBER_MAX, RULE_NUMBER_MAX): New. - * src/scan-gram.l (add_column_width, adjust_location): Move to and - rename as... - * src/location.h, src/location.c (add_column_width) - (location_compute): these. - Fix the column count: the initial column is 0. - (location_print): Be robust to ending column being 0. - * src/location.h (boundary_set): New. - * src/main.c: Adjust to scanner_free being renamed as - gram_scanner_free. - * src/output.c: Include scan-code.h. - * src/parse-gram.y: Include scan-gram.h and scan-code.h. - Use boundary_set. - (PERCENT_DESTRUCTOR, PERCENT_PRINTER, PERCENT_INITIAL_ACTION) - (PERCENT_LEX_PARAM, PERCENT_PARSE_PARAM): Remove the {...} part, - which is now, again, a separate token. - Adjust all dependencies. - Whereever actions with $ and @ are used, use translate_code. - (action): Remove this nonterminal which is now useless. - * src/reader.c: Include assert.h, scan-gram.h and scan-code.h. - (grammar_current_rule_action_append): Use translate_code. - (packgram): Bound check ruleno, itemno, and rule_length. - * src/reader.h (gram_in, gram__flex_debug, scanner_cursor) - (last_string, last_braced_code_loc, max_left_semantic_context) - (scanner_initialize, scanner_free, scanner_last_string_free) - (gram_out, gram_lineno, YY_DECL_): Move to... - * src/scan-gram.h: this new file. - (YY_DECL): Rename as... - (GRAM_DECL): this. - * src/scan-code.h, src/scan-code.l, src/scan-code-c.c: New. - * src/scan-gram.l (gram_get_lineno, gram_get_in, gram_get_out): - (gram_get_leng, gram_get_text, gram_set_lineno, gram_set_in): - (gram_set_out, gram_get_debug, gram_set_debug, gram_lex_destroy): - Move these declarations, and... - (obstack_for_string, STRING_GROW, STRING_FINISH, STRING_FREE): - these to... - * src/flex-scanner.h: this new file. - * src/scan-gram.l (rule_length, rule_length_overflow) - (increment_rule_length): Remove. - (last_braced_code_loc): Rename as... - (gram_last_braced_code_loc): this. - Adjust to the changes of the parser. - Move all the handling of $ and @ into... - * src/scan-code.l: here. - * src/scan-gram.l (handle_dollar, handle_at): Remove. - (handle_action_dollar, handle_action_at): Move to... - * src/scan-code.l: here. - * src/Makefile.am (bison_SOURCES): Add flex-scanner.h, - scan-code.h, scan-code-c.c, scan-gram.h. - (EXTRA_bison_SOURCES): Add scan-code.l. - (BUILT_SOURCES): Add scan-code.c. - (yacc): Be robust to white spaces. - - * tests/conflicts.at, tests/input.at, tests/reduce.at, - * tests/regression.at: Adjust the column numbers. - * tests/regression.at: Adjust the error message. - -2006-06-06 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/getargs.c (usage): Mention GLR not just LALR(1) in --help output. - Use Akim's wording from - <http://lists.gnu.org/archive/html/bison-patches/2006-05/msg00056.html>. - -2006-06-06 Joel E. Denny <jdenny@ces.clemson.edu> - - Between Bison releases, manually append `+' to the previous Bison - release number, and use that as a signal to automatically print the - ChangeLog's CVS Id keyword from --version. Discussed starting at - <http://lists.gnu.org/archive/html/bison-patches/2006-05/msg00028.html>. - * ChangeLog: Add Id header. - * configure.ac (AC_INIT): Append `+' to `2.3'. - * src/.cvsignore: Add revision.c. - * src/Makefile.am (bison_SOURCES): Add revision.c and revision.h. - (BUILT_SOURCES): Add revision.c. - (revision.c): New target rule. This file defines a new global variable - named revision. It initializes it with either the Id from ChangeLog - or, if VERSION doesn't contain `+', with the empty string. - * src/getargs.c (version): Print the value of revision. - * src/revision.h: Extern revision. - -2006-06-05 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Version 2.3. - * configure.ac (AC_INIT): Likewise. - -2006-05-30 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (YYRECOVERING): Define to be a function-like macro - with no arguments, not as an object-like macro. This is for - compatibility with data/yacc.c. Problem reported by John P. Hartmann in - <http://lists.gnu.org/archive/html/bug-bison/2006-05/msg00059.html>. - * doc/bison.texinfo (Action Features, Error Recovery, Table of Symbols): - Document this. - -2006-05-30 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/getargs.c (usage): Back out yesterday's modification of the - --help output so that we don't have to wait for translation before - releasing 2.3. - -2006-05-29 Paul Eggert <eggert@cs.ucla.edu> - - * doc/bison.texinfo (Introduction): Don't say "GLR grammar". - Problem reported by Akim Demaille. - -2006-05-29 Joel E. Denny <jdenny@ces.clemson.edu> - - * src/getargs.c (usage): Mention GLR not just LALR(1) in --help output. - -2006-05-26 Paul Eggert <eggert@cs.ucla.edu> - - * data/yacc.c (yy_reduce_print): Omit trailing white space in - generated source code. Problem reported by Frans Englich in - <http://lists.gnu.org/archive/html/bug-bison/2006-05/msg00049.html>. - -2006-05-22 Paul Eggert <eggert@cs.ucla.edu> - - * Makefile.maint (gzip_rsyncable, GZIP_ENV): Compute within the - shell, not within 'make', so that 'make' by an ordinary builder - (using GNU make) does not worry about configuring gzip. This also - works around a bug reported independently by Keith Thompson and by - Georg Schwarz, whereby gzip 1.2.4 --help would output usage on - stderr rather than stdout, messing up the build logs. - -2006-05-21 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/yacc.c (yyparse): Wrap the final return from yyparse inside YYID - to make sure that YYID will never be unused. This fixes a 'make - maintainer-check' failure caused by the recent changes to the 'Trivial - grammars' test case, which caused g++ 4.1.0 to complain that YYID was - not used. - * data/glr.c (yyparse): Wrap yyparse's return inside YYID just in case. - -2006-05-21 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/glr.c (yyresolveLocations): Remove bogus YYASSERT that the - state before an empty RHS is always resolved here. Only the location - of that state is guaranteed to be resolved, and that's enough. This - fixes the remaining bug reported by Derek M. Jones in - <http://lists.gnu.org/archive/html/bug-bison/2006-05/msg00027.html>. - * tests/glr-regression.at (Uninitialized location when reporting - ambiguity): Test the above case. - Also, the embedded comments in this test case claim it checks the case - of an empty RHS that has inherited the initial location. However, the - corresponding LHS was already resolved, so yyresolveLocations didn't - actually have reason to modify it. Fix this by forcing - nondeterministic operation at the beginning of the parse. - -2006-05-20 Paul Eggert <eggert@cs.ucla.edu> - - * data/c.m4 (b4_yy_symbol_print_generate): - (b4_yy_symbol_print_generate): Use 'YYSTYPE const' rather than - 'const YYSTYPE', and similarly for YYLTYPE. This fixes one - of the bugs reported today by Derek M Jones in - <http://lists.gnu.org/archive/html/bug-bison/2006-05/msg00027.html>. - * doc/bison.texinfo (Value Type): Document that YYSTYPE must be - defined to be a type name without parens or brackets. - (Location Type): Similarly for YYLTYPE. - * tests/regression.at (Trivial grammars): Put in a test for this - bug that will be caught by 'make maintainer-check' (though not, - alas, by 'make check' unless your compiler is picky). - -2006-05-19 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Version 2.2. - * configure.ac (AC_INIT): Likewise. - -2006-05-17 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/glr.c (yyreportTree): Make room in yystates for the state - preceding the RHS. This fixes the segmentation fault reported by Derek - M. Jones in - <http://lists.gnu.org/archive/html/help-bison/2006-05/msg00035.html>. - (yyreportTree, yypdumpstack): Subtract 1 from yyrule before printing - to the user. Reported for yyreportTree by Derek M. Jones later in the - same thread. - * THANKS: Add Derek M. Jones. - Update my email address. - Fix typo in Steve Murphy's name. - -2006-05-14 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (yyreportSyntaxError): Fix off-by-one error in - checking against YYLAST that caused the parser to miss a potential - alternative in its diagnostic. - Problem reported by Maria Jose Moron Fernandez in - <http://lists.gnu.org/archive/html/bug-bison/2006-05/msg00024.html>. - * data/lalr1.cc (yysyntax_error_): Likewise. - * data/yacc.c (yysyntax_error): Likewise. - * tests/regression.at (_AT_DATA_DANCER_Y): Use static array for - tokens, in case we run into an older C compiler. - (_AT_DATA_EXPECT2_Y, AT_CHECK_EXPECT2): New macros. - Use them to check for the off-by-one error fixed above. - - * data/yacc.c (yytnamerr): Fix typo: local var should be of type - YYSIZE_T, not size_t. - * tests/regression.at (Trivial grammars): New test, to catch - the error fixed by the above patch. - -2006-05-14 Akim Demaille <akim@lrde.epita.fr> - - * doc/bison.texinfo (C++ Bison Interface): Clarify the naming - scheme. - Reported by Steve Murphy. - -2006-05-14 Akim Demaille <akim@lrde.epita.fr> - - * data/glr.cc, data/lalr1.cc: Using %defines is mandatory. - * data/glr.cc: b4_location_flag is now b4_locations_flag. - -2006-05-14 Akim Demaille <akim@lrde.epita.fr> - - Implement --trace=m4. - * src/getargs.c (trace_types, trace_args): Accept trace_m4. - * src/output.c (output_skeleton): When set, pass -dV to m4. - - Factor the handling of flags in m4. - * src/output.c (prepare): Rename the muscle names debug, defines, - error_verbose to debug_flag, defines_flag, error_verbose_flag. - * data/c.m4: Adjust. - (_b4_define_flag_if, b4_define_flag_if, b4_defines_if): New. - Use b4_define_flag_if to define other b4_FLAG_if macros. - (b4_location_if): As a consequence, rename as... - (b4_locations_if): this, for consistency. - Adjust all the skeletons. - -2006-05-14 Akim Demaille <akim@lrde.epita.fr> - - * etc/bench.pm: Shorten bench names. - -2006-05-14 Akim Demaille <akim@lrde.epita.fr> - - * src/output.h, src/output.c (error_verbose): Move to... - * src/getargs.h, src/getargs.c: here. - Sort the flags. - Adjust dependencies. - -2006-05-13 Paul Eggert <eggert@cs.ucla.edu> - - * data/c.m4 (b4_copyright): Put the special exception for Bison - skeletons here, so we don't have to put it in each skeleton. All - uses changed. Suggested by Akim Demaille. Also, wrap the - copyright notice, in case it is longer than 80 columns. Replace - comma by newline after title. - -2006-05-11 Paul Eggert <eggert@cs.ucla.edu> - - * doc/bison.texinfo (Calc++ Scanner): The flex behavior is an - incompatibility, not a bug. Mention that it wasn't fixed as of - flex 2.5.33. - -2006-05-11 Akim Demaille <akim@lrde.epita.fr> - - * examples/extexi: Enforce the precedence of concatenation over - >>. - Reported by Tommy Nordgren. - -2006-05-11 Akim Demaille <akim@lrde.epita.fr> - - * data/lalr1.cc (yytranslate_): Rename token as t to avoid clashes - with the member "token". - Reported by Martin Nylin. - -2006-05-08 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c: Switch to Bison 2.2 special-exception language in - the copyright notice. Use more-regular format for titles and - copyright notices. - * data/glr.cc: Likewise. - * data/location.cc: Likewise. - * data/yacc.cc: Likewise. - * doc/bison.texinfo (Conditions): Document this. - * NEWS: likewise. Upgrade version to 2.2. - -2006-04-27 Akim Demaille <akim@lrde.epita.fr> - - * data/glr.cc: Remove dead code. - -2006-04-25 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap: Comment out the AM_CPPFLAGS line, since we don't use - that variable and the line breaks the bootstrap. Problem reported - by Juan M. Guerrero. - -2006-04-24 Akim Demaille <akim@lrde.epita.fr> - - * doc/bison.texinfo (Multiple start-symbols): New. - -2006-04-24 Akim Demaille <akim@lrde.epita.fr> - - * etc/README, etc/bench.pl: New. - -2006-04-03 Akim Demaille <akim@lrde.epita.fr> - - * src/scan-gram.l: Be robust to BRACED_CODE appearing before any - rule. - Reported by Mickael Labau. - * tests/input.at (Torturing the Scanner): Test it. - -2006-03-16 Paul Eggert <eggert@cs.ucla.edu> - - * doc/bison.texinfo (Decl Summary): Don't mention yylloc twice. - Problem reported by Bob Rossi. - -2006-03-13 Paul Eggert <eggert@cs.ucla.edu> - - * doc/bison.texinfo: Remove @shorttitlepage stuff; it wasn't used - and didn't really work. - For the index, use @ifnotinfo, not @iftex. - Minor cleanups of spacing and terminology. - -2006-03-12 Akim Demaille <akim@lrde.epita.fr> - - * tests/local.at (_AT_BISON_OPTION_PUSHDEFS): Fix the definition - of AT_NAME_PREFIX when %name-prefix is not used. - -2006-03-12 Akim Demaille <akim@lrde.epita.fr> - - Apply --prefix to C++ skeletons too: they change the namespace. - The test suite already exercize these cases. - * data/c++.m4 (b4_namespace): New. - * data/lalr1.cc, data/glr.cc, data/location.cc: Use it instead of `yy'. - * data/lalr1.cc (yytnameerr_): Move its definition into the namespace. - * data/yacc.c, data/glr.c: Remove a useless `[]'. - * doc/bison.texinfo: Document it. - (Option Cross Key): Use @multitable in all formats. It looks - nicer, even in TeX outputs. - (Rules): Use the same code whatever the output type is. - * tests/local.at (_AT_BISON_OPTION_PUSHDEFS) - (_AT_BISON_OPTION_POPDEFS): Support AT_NAME_PREFIX. - * tests/calc.at: Use it, instead of hard coding `yy'. - -2006-03-10 Akim Demaille <akim@lrde.epita.fr> - - * TODO: Remove dead items. - -2006-03-10 Akim Demaille <akim@lrde.epita.fr> - - * doc/FAQ: Remove, merged into... - * doc/bison.texinfo (FAQ): this. - * doc/Makefile.am (EXTRA_DIST): Adjust. - -2006-03-10 Akim Demaille <akim@lrde.epita.fr> - - * data/c.m4 (b4_token_enum): Always define the enum of tokens, - even if empty. - * data/lalrl1.cc, data/glr.cc (parser::token_type): New. - * doc/bison.texinfo (Calc++ Scanner): Use it. - -2006-03-09 Paul Eggert <eggert@cs.ucla.edu> - - Fix two nits reported by twlevo, plus one more that I discovered. - - * src/assoc.h (assoc_to_string): Give a name to the arg, as - this is the usual Bison style. - * src/location.h (location_print): Likewise. - - * src/reader.h (token_name): Likewise. - -2006-03-08 Paul Eggert <eggert@cs.ucla.edu> - - Fix some nits reported by twlevo. - * doc/FAQ: Remove ancient Y2K FAQ, replacing it with "secure" - and "POSIX". Use more-modern syntax for URLs. Mention C++ - and ask for Java. Don't hardwire OS version numbers. Add - copyright notice. - * m4/.cvsignore: Add unistd_h.m4, for latest gnulib. - * src/conflicts.c (solved_conflicts_obstack): Now static. - -2006-03-08 Joel E. Denny <jdenny@ces.clemson.edu> - - * doc/bison.texinfo (Introduction): Mention GLR and C++ as on the web - page. Say "you can use it" not "you may use it" as on the web page; - we're describing capabilities not granting permission. - -2006-03-06 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (yyresolveLocations): Rename local variables to avoid - shadowing warnings. Use usual patter for iterating through RHS. - * tests/glr-regression.at - (Uninitialized location when reporting ambiguity): - Modify yylex so that it uses its argument, rather than trying - to rely on ARGSUSED (which doesn't work for gcc with warnings). - const char -> char const. - - * tests/Makefile.am ($(srcdir)/package.m4, maintainer-check-valgrind): - Don't use tabs inside commands; it messes up 'ps'. - Problem reported by twlevo. - -2006-03-06 Joel E. Denny <jdenny@ces.clemson.edu> - - * tests/glr-regression.at (Uninitialized location when reporting - ambiguity): New test case. - * data/glr.c (yyresolveLocations): New function, which uses - YYLLOC_DEFAULT. - (yyresolveValue): Invoke yyresolveLocations before reporting an - ambiguity. - * doc/bison.texinfo (Default Action for Locations): Note - YYLLOC_DEFAULT's usage for ambiguity locations. - (GLR Semantic Actions): Cross-reference those notes. - -2006-03-04 Joel E. Denny <jdenny@ces.clemson.edu> - - * tests/glr-regression.at (Leaked semantic values when reporting - ambiguity): Remove unnecessary union and type declarations. - (Leaked lookahead after nondeterministic parse syntax error): New test - case. - * data/glr.c (yyparse): Check for zero stacks remaining before - attempting to shift the lookahead so that you don't lose it. - -2006-03-02 Joel E. Denny <jdenny@ces.clemson.edu> - - Avoid memory leaks by not invoking longjmp in yyreportAmbiguity. - * tests/glr-regression.at (Leaked semantic values when reporting - ambiguity): New test case. - * data/glr.c (yyreportAmbiguity): Invoke yyyerror directly and return - yyabort rather than invoking yyFail, which invokes longjmp. Remove the - now unnecessary yystackp parameter. - (yyresolveValue): Return yyreportAmbiguity's result. Now the necessary - destructors can be called. - - * tests/glr-regression.at: Don't invoke bison with `-t' unnecessarily - in existing testcases. - -2006-03-02 Joel E. Denny <jdenny@ces.clemson.edu> - - Don't leak semantic values for parent RHS when a user action cuts the - parser, and clean up related code a bit. - * tests/glr-regression.at (Leaked merged semantic value if user action - cuts parse): Rename to... - (Leaked semantic values if user action cuts parse): ... this. Add check - for leaked parent RHS values. - * data/glr.c (yydestroyGLRState): In debugging output, distinguish - between an unresolved state (non-empty chain of semantic options) and - an incomplete one (signaled by an empty chain). - (yyresolveStates): Document the interface. Move all manipulation of a - successfully or unsuccessfully resolved yyGLRState to... - (yyresolveValue): ... here so that yyresolveValue always leaves a - yyGLRState with consistent data and thus is easier to understand. - Remove the yyvalp and yylocp parameters since they are always just - taken from the yys parameter. When reporting a discarded merged value - in debugging output, note that it is incompletely merged. Document the - interface. - (yyresolveAction): If resolving any of the RHS states fails, destroy - them all rather than leaking them. Thus, as long as user actions are - written to clean up the RHS correctly, yyresolveAction always cleans up - the RHS of a semantic option. Document the interface. - -2006-02-27 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (yyexpandGLRStack): Catch an off-by-one error that - led to a segmentation fault in GNU Pascal. Problem reported - by Waldek Hebisch. - -2006-02-21 Joel E. Denny <jdenny@ces.clemson.edu> - - * doc/bison.texinfo (Mid-Rule Actions): Explain how to bury a - mid-rule action inside a nonterminal symbol in order to declare a - destructor for its semantic value. - -2006-02-16 Paul Eggert <eggert@cs.ucla.edu> - - * data/yacc.c [(! defined yyoverflow || YYERROR_VERBOSE) && ! - YYSTACK_USE_ALLOCA && ! defined YYSTACK_ALLOC && defined - __cplusplus && ! defined _STDLIB_H && ! - ((defined YYMALLOC || defined malloc) && (defined YYFREE || - defined free))]: Include <stdlib.h> rather than rolling our own - declarations of malloc and free, to avoid problems with - incompatible declarations (using 'throw') C++'s stdlib.h. This - should fix Debian bug 340012 - <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=340012>, - reported by Guillaume Melquiond. - -2006-02-13 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Clarify symbols versus types in unused-value warnings. - - * configure.ac (AC_INIT): Bump version number. - -2006-02-13 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Version 2.1a. - * tests/headers.at (AT_TEST_CPP_GUARD_H): Declare yyerror and yylex, - since C99 requires this. - -2006-02-11 Paul Eggert <eggert@cs.ucla.edu> - - * m4/c-working.m4: New file. - * configure.ac (BISON_TEST_FOR_WORKING_C_COMPILER): Use it. - -2006-02-10 Paul Eggert <eggert@cs.ucla.edu> - - * Makefile.maint: Merge from coreutils. - -2006-02-09 Paul Eggert <eggert@cs.ucla.edu> - - More portability fixes for problems summarized by Nelson H. F. Beebe. - - * m4/cxx.m4 (BISON_TEST_FOR_WORKING_CXX_COMPILER): Catch a - configuration screwup "./configure CC=/opt/SUNWspro/bin/c89 - CFLAGS="-xarch=generic64" CXX=/opt/SUNWspro/bin/CC - LDFLAGS="-xarch=generic64" with Sun C 5.7 on Solaris 10; this - messes up because C++ code is compiled in 32-bit mode but linked - in 64-bit mode. - -2006-02-08 Paul Eggert <eggert@cs.ucla.edu> - - More portability fixes for problems summarized by Nelson H. F. Beebe. - - * doc/bison.texinfo (Calc++ Scanner): Work around a bug in flex - 2.5.31. This resembles the 2005-10-10 patch to src/scan-skel.l. - - * examples/calc++/Makefile.am (check_PROGRAMS): Renamed from - nodist_PROGRAMS, since we don't need to actually compile the - example if we're just doing a plain 'make'. This avoids bothering - the installer unnecessarily about problems due to weird C++ - compilers. - -2006-02-06 Paul Eggert <eggert@cs.ucla.edu> - - More portability fixes for problems summarized by Nelson H. F. Beebe. - - * tests/headers.at (AT_TEST_CPP_GUARD_H): Use #include <...> rather - than #include "...", and compile with -I'.'. The old method was - not portable, according to Posix and the C standard, and it does - not work with Sun C 5.7, where previous #line directives affect - the working directory used in later #include "..." directives. - -2006-02-06 Juan Manuel Guerrero <juan.guerrero@gmx.de> - - Various DJGGP specific issues in /djgpp - -2006-02-02 Paul Eggert <eggert@cs.ucla.edu> - - More portability fixes for problems summarized by Nelson H. F. Beebe. - - * m4/cxx.m4 (BISON_TEST_FOR_WORKING_CXX_COMPILER): Check that - '#include <map>' works and that you can apply ++ to iterators. - -2006-02-01 Paul Eggert <eggert@cs.ucla.edu> - - Work around portability problems summarized by Nelson H. F. Beebe in - <http://lists.gnu.org/archive/html/bug-bison/2005-09/msg00021.html>. - - * m4/cxx.m4 (BISON_TEST_FOR_WORKING_CXX_COMPILER): Check - that '#include <string>' works. - - * data/lalr1.cc (yytranslate_): No longer inline, to work around a - porting problem to g++ 3.4.3 on Darwin 7.9.0, where g++ complained - "warning: sorry: semantics of inline function static data `const - unsigned char translate_table[262]' are wrong (you'll wind up with - multiple copies)". - - * lib/bbitset.h (struct bitset_vtable): Rename members not, and, - or, xor to not_, and_, or_, and xor_, respectively. This works - around a bug in GCC 3.4.3 on Irix 6.5, which apparently has a - random system header somewhere that includes the equivalent of - <iso646.h>. - - * tests/headers.at (AT_TEST_CPP_GUARD_H): Don't assume that "$CC - -E" works; it apparently doesn't work with PathScale EKO Compiler - Suite Version 2.0. - -2006-01-30 Joel E. Denny <jdenny@ces.clemson.edu> - - During deterministic GLR operation, user actions should be able to - influence the parse by changing yychar. To make this easier to fix and - to make glr.c easier to evolve in general, don't maintain yytoken in - parallel with yychar; just compute yytoken when needed. - * tests/glr-regression.at (Incorrect lookahead during deterministic - GLR): Check that setting yychar in a user action has the intended - effect. - * data/glr.c (yyGLRStack): Remove yytokenp member. - (yyclearin): Don't set *yytokenp. - (yyprocessOneStack, yyreportSyntaxError, yyrecoverSyntaxError): Examine - yychar rather than *yytokenp to determine the current lookahead. - Compute yytoken locally when needed. - (yyparse): Likewise. Remove the local yytoken that yytokenp used to - point to. - - * doc/bison.texinfo (Bison Options): Remove stray sentence fragment - after `--report' documentation. - -2006-01-30 Paul Eggert <eggert@cs.ucla.edu> - - * src/parse-gram.y (grammar_declaration): Location of printer - symbol is @1, not list->location. Bug reported by twlevo. - * tests/input.at (Incompatible Aliases): Adjust to above change. - -2006-01-29 Paul Eggert <eggert@cs.ucla.edu> - - * tests/input.at (AT_CHECK_UNUSED_VALUES): Remove. Instead, do - all the test at once. This makes the output easier to read in the - normal case. - - Fix a longstanding bug uncovered by bro-0.9a9/src/parse.y, which I - got from <http://bro-ids.org/download.html>. The bug is that - when two actions appeared in succession, the second one was - scanned before the first one was added to the grammar rule - as a midrule action. Bison then output the incorrect warning - "parse.y:905.17-906.36: warning: unused value: $3". - * src/parse-gram.y (BRACED_CODE, action): These are no longer - associated with a value. - (rhs): Don't invoke grammar_current_rule_action_append. - (action): Invoke it here instead. - * src/reader.c (grammar_midrule_action): Now extern. - (grammar_current_rule_action_append): Don't invoke - grammar_midrule_action; that is now the scanner's job. - * src/reader.h (last_string, last_braced_code_loc): - (grammar_midrule_action): New decls. - * src/scan-gram.l (last_string): Now extern, sigh. - (last_braced_code_loc): New extern variable. - (<INITIAL>"{"): Invoke grammar_midrule_action if the current - rule already has an action. - (<SC_BRACED_CODE>"}"): Set last_braced_code_loc before returning. - * tests/input.at (AT_CHECK_UNUSED_VALUES): - Add some tests to check that the above changes fixed the bug. - -2006-01-27 Paul Eggert <eggert@cs.ucla.edu> - - * src/reader.c (symbol_should_be_used): Renamed from symbol_typed_p. - All used changed. Check whether the symbol has a destructor, - not whether it is typed. - * tests/input.at (AT_CHECK_UNUSED_VALUES): Add a destructor, so - that the values are still reported as unused. All line numbers - adjusted. - -2006-01-23 Paul Eggert <eggert@cs.ucla.edu> - - Work around a bug in bro 0.8, which underparenthesizes its - definition of YYLLOC_DEFAULT. - * data/glr.c: Change all uses of YYLLOC_DEFAULT to parenthesize - their arguments. - * data/lalr1.cc: Likewise. - * data/yacc.cc: Likewise. - -2006-01-22 Paul Eggert <eggert@cs.ucla.edu> - - Work around a bug in Pike 7.0, and give the Pike folks a - better way to override the usual int widths. - * data/yacc.c (b4_int_type): Use yytype_uint8, etc., so that the - user can override the types. - (short): #undef, to work around a bug in Pike 7.0. - (yytype_uint8, yytype_int8, yytype_uint16, yytype_int16): New types. - (union yyalloc.yyss): Use yytype_int16 rather than short. - All uses changed. - (yysigned_char): Remove. - * src/parse-gram.y (YYTYPE_UINT8, YYTYPE_INT8, YYTYPE_UINT16): - (YYTYPE_INT16): New macros, to test the new facility in yacc.c. - * tests/regression.at (Web2c Actions): Adjust to above changes. - - * src/reader.c (check_and_convert_grammar): New function. - (reader): Close the input file even if something went wrong during - parsing. Minor file descriptor leak reported by twlevo. - - * src/assoc.c (assoc_to_string): Use a default: abort (); case - to pacify gcc -Wswitch-default. - * src/scan-gram.l (adjust_location): Use a default: break; case - to pacify gcc -Wswitch-default. - * src/scan-skel.h (skel_get_lineno, skel_get_in, skel_get_out): - (skel_get_leng, skel_get_text, skel_set_lineno, skel_set_in): - (skel_set_out, skel_get_debug, skel_set_debug, skel_lex_destroy): - Move these decls to scan-skel.l, since they don't need to be - visible elsewhere. - * src/scan-skel.l: Accept the above decls. - (skel_lex): New decl, to pacify GCC when unpatched flex 2.5.31 - is used. - -2006-01-21 Paul Eggert <eggert@cs.ucla.edu> - - * Makefile.cfg (local-checks-to-skip): Add changelog-check, - since we don't want to insist on a version number at the start - of the changelog every time. - * Makefile.maint: Sync from coreutils a bit better. - (sc_trailing_blank): Renamed from sc_trailing_space. - All uses changed. - (sc_no_if_have_config_h, sc_require_config_h): - (sc_prohibit_assert_without_use): New rules. - (sc_obsolete_symbols): Don't catch Makefile.maint itself. - (sc_dd_max_sym_length): Fix leading spaces in rule. - (sc_system_h_headers): Prefix with @. - (sc_useless_cpp_parens, m4-check): Output line numbers. - (changelog-check): Allow version only in head. - * data/c.m4: Use "defined FOO" instead of "defined (FOO)", to - satisfy new Makefile.maint rule. - * data/glr.c: Likewise. - * data/glr.cc: Likewise. - * data/lalr1.cc: Likewise. - * data/yacc.c: Likewise. - * lib/ebitsetv.c: Likewise. - * lib/lbitset.c: Likewise. - * lib/subpipe.c: Likewise. - * lib/timevar.c: Likewise. - * src/system.h: Likewise. - * data/yacc.c (YYSTYPE): Don't generate trailing spaces in output. - * djgpp/Makefile.maint: Add copyright notice. - * djgpp/README.in: Likewise. - * djgpp/config.bat: Likewise. - * djgpp/config.site: Likewise. - * djgpp/config_h.sed: Likewise. - * djgpp/djunpack.bat: Likewise. - * djgpp/config.sed: Fix copyright notice to match standard format. - * djgpp/subpipe.h: Likewise. - * lib/bitsetv-print.c: Likewise. - * lib/bitsetv.c: Likewise. - * lib/subpipe.h: Likewise. - * lib/timevar.c: Likewise. - * lib/timevar.h: Likewise. - * djgpp/subpipe.c: Use standard recipe for config.h. - * lib/abitset.c: Likewise. - * lib/bitset.c: Likewise. - * lib/bitset_stats.c: Likewise. - * lib/bitsetv-print.c: Likewise. - * lib/bitsetv.c: Likewise. - * lib/ebitsetv.c: Likewise. - * lib/get-errno.c: Likewise. - * lib/lbitset.c: Likewise. - * lib/subpipe.c: Likewise. - * lib/timevar.c: Likewise. - * lib/vbitset.c: Likewise. - * tests/local.at: Likewise. - * src/scan-gram.l: Don't include verify.h, since system.h does - that for us. - * .x-sc_require_config_h: New file. - * .x-sc_unmarked_diagnostics: New file. - -2006-01-20 Paul Eggert <eggert@cs.ucla.edu> - - Be a bit more systematic about using 'abort'. - * lib/abitset.c (abitset_test): Remove ATTRIBUTE_UNUSED; not needed. - * lib/bitset.c (bitset_bytes, bitset_init, bitset_op4_cmp): - Put 'default: abort ();' before some other case, to satisfy older - pedantic compilers. - * lib/bitset_stats.c (bitset_stats_init): Likewise. - * lib/ebitset.c (ebitset_elt_find, ebitset_op3_cmp): Likewise. - * lib/lbitset.c (lbitset_elt_find, lbitset_op3_cmp): Likewise. - * src/conflicts.c (resolve_sr_conflict): Likewise. - * src/vcg.c (get_color_str, get_textmode_str, get_shape_str): - (get_decision_str, get_orientation_str, get_node_alignment_str): - (get_arrow_mode_str, get_crossing_type_str, get_view_str): - (get_linestyle_str, get_arrowstyle_str): Likewise. - * src/conflicts.c (resolve_sr_conflict): - Use a default case rather than one for the one remaining enum - value, to catch invalid enum values as well. - * src/lalr.c (set_goto_map, map_goto): - Prefer "assert (FOO);" to "if (!FOO) abort ();". - * src/nullable.c (nullable_compute, token_definitions_output): - Likewise. - * src/reader.c (packgram, reader): Likewise. - * src/state.c (transitions_to, state_new, state_reduction_find): - Likewise. - * src/symtab.c (symbol_user_token_number_set, symbol_make_alias): - (symbol_pack): Likewise. - * src/tables.c (conflict_row, pack_vector): Likewise. - * src/scan-skel.l (QPUTS): Remove unnecessary parens. - (BASE_QPUTS, "@output ".*\n): Remove unnecessary asserts. - * src/system.h: Don't include <assert.h>. - (assert): New macro. - - * doc/bison.texinfo (Prologue, Rules, Actions, Union Decl, Action Decl): - (Destructor Decl, Parser Function, Pure Calling): - Describe rules for braces inside C code more carefully. - -2006-01-19 Paul Eggert <eggert@cs.ucla.edu> - - Fix some porting glitches found by Nelson H. F. Beebe. - * lib/abitset.c (abitset_resize): Rewrite to avoid warnings from - compilers that don't understand that abort () does not return. - * src/state.c (transitions_to): Likewise. - * m4/cxx.m4 (BISON_TEST_FOR_WORKING_CXX_COMPILER): Check - that '#include <cstdlib>' works. - * src/system.h (INT8_MIN, INT16_MIN, INT32_MIN, INT8_MAX): - (INT16_MAX, UINT8_MAX, INT32_MAX, UINT16_MAX, UINT32_MAX): - #undef if ! defined __STDC_VERSION__ || __STDC_VERSION__ < 199901, - for the benefit of some pre-C99 compilers. - - * bootstrap: Undo changes to gnulib files that autoreconf made. - - Minor fixups to get 'make maintainer-check' to work. - * configure.ac: Don't use -Wnested-externs, as it's incompatible - with the new verify.h implementation. - * data/c.m4 (b4_yy_symbol_print_generate): YYUSE (yyoutput). - * data/glr.c (YYUSE): Depend on __GNUC__ as well. - * data/yacc.c (YYUSE): Likewise. - * data/lalr1.cc (yysyntax_error_): YYUSE (yystate). - * lib/subpipe.c (end_of_output_subpipe): The args are unused. - * src/parse-gram.y (declaration): Don't pass a string constant - to a function that expects char *, since GCC might complain - about the constant value. - * src/reader.c (symbol_typed_p): Add parens to pacify GCC. - * tests/cxx-type.at (_AT_TEST_GLR_CXXTYPES): #undef yylloc and yylval - before #defining them. - * tests/glr-regression.at - (Incorrectly initialized location for empty right-hand side in GLR): - In yyerror, use the msg arg. - (Corrupted semantic options if user action cuts parse): - (Incorrect lookahead during deterministic GLR): - (Incorrect lookahead during nondeterministic GLR): - Don't name a local var 'index'; it shadows string.h's 'index'. - -2006-01-19 Akim Demaille <akim@epita.fr> - - * tests/calc.at (_AT_DATA_CALC_Y): Initialize the whole initial - location, not just parts of it. - -2006-01-18 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Document the fact that multiple %unions are now allowed. - * doc/bison.texinfo (Union Decl): Likewise. - * TODO: This feature is now implemented, so remove it from - the wishlist. - - * Makefile.maint: Merge with coreutils Makefile.maint. - (CVS_LIST): Use build-aux version if available. - (VERSION_REGEXP): New macro. - (syntax-check-rules): Add sc_no_if_have_config_h, - sc_prohibit_assert_without_use, sc_require_config_h, - sc_useless_cpp_parens. - (sc_obsolete_symbols): Check for O_NDELAY. - (sc_dd_max_sym_length): Track coreutils. - (sc_unmarked_diagnostics): Look in all files, not just *.c. - (sc_useless_cpp_parens): New rule. - (news-date-check): Look for version or today's date. - (changelog-check): Don't require version number near head. - (copyright-check): Use current year instead of hardwiring 2005. - (my-distcheck): Depend on $(release_archive_dir)/$(prev-tgz). - (announcement): Add --gpg-key-ID. - - * djgpp/config.sed: Add copyright notice, and replace "filesystem" - with "file system". - - Avoid undefined behavior that addressed just before the start of an - array. Problem reported by twlevo. - * src/reader.c (packgram): Prepend a new sentinel before ritem. - * src/lalr.c (build_relations): Rely on new sentinel. - * src/gram.c (gram_free): Adjust to new sentinel. - -2006-01-12 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/glr.c (yyGLRStateSet): Rename yylookaheadStatuses to - yylookaheadNeeds. All uses updated. - (yysplitStack): Rename local yynewLookaheadStatuses to - yynewLookaheadNeeds. - * data/glr-regression.at (Incorrect lookahead during nondeterministic - GLR): In comments, change `lookahead status' to `lookahead need'. - -2006-01-11 Paul Hilfinger <hilfingr@tully.CS.Berkeley.EDU> - - * data/glr.c (yysplitStack): A little stylistic rewrite. - -2006-01-11 Paul Hilfinger <hilfingr@tully.CS.Berkeley.EDU> - - * data/glr.c (yyaddDeferredAction): Flesh out the comment. - -2006-01-11 Joel E. Denny <jdenny@ces.clemson.edu> - - * doc/bison.texinfo: Fix some typos. - (GLR Semantic Actions): New subsection discussing special - considerations because GLR semantic actions might be deferred. - (Actions): Mention look-ahead usage of yylval. - (Actions and Locations): Mention look-ahead usage of yylloc. - (Special Features for Use in Actions): Add YYEOF entry and mention it - in the yychar entry. - In the yychar entry, remove mention of the local yychar case (pure - parser) since this is irrelevant information when writing semantic - actions and since it's already discussed in `Table of Symbols' where - yychar is otherwise described as an external variable. - In the yychar entry, don't call it the `current' look-ahead since it - isn't when semantic actions are deferred. - In the yychar and yyclearin entries, add note about deferred semantic - actions. - Add yylloc and yylval entries discussing look-ahead usage. - (Look-Ahead Tokens): When discussing yychar, don't call it the - `current' look-ahead, and do mention yylval and yylloc. - (Error Recovery): Cross-reference `Action Features' when mentioning - yyclearin. - (Table of Symbols): In the yychar entry, don't call it the `current' - look-ahead. - In the yylloc and yylval entries, mention look-ahead usage. - -2006-01-08 Joel E. Denny <jdenny@ces.clemson.edu> - - * tests/glr-regression.at: Update copyright year to 2006. - -2006-01-06 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/glr.c (yyGLRStateSet): Add yybool* yylookaheadStatuses member to - use during nondeterministic operation to track which stacks have - actually needed the current lookahead. - (yyinitStateSet, yyfreeStateSet, yyremoveDeletes, yysplitStack): - Allocate, deallocate, resize, and otherwise shuffle space for - yylookaheadStatuses in parallel with yystates member of yyGLRStateSet. - (yysplitStack, yyprocessOneStack, yyparse): Set lookahead status - appropriately during nondeterministic operation. - (yySemanticOption): Add int yyrawchar, YYSTYPE yyval, and YYLTYPE yyloc - members to store the current lookahead to be used by the deferred - user action. - (yyaddDeferredAction): Add size_t yyk parameter specifying the stack - from which the RHS is taken. Set the lookahead members of the new - yySemanticOption according to the lookahead status for stack yyk. - (yyglrShiftDefer, yyglrReduce): Pass yyk parameter on to - yyaddDeferredAction. - (yyresolveAction): Set yychar, yylval, and yylloc to the lookahead - members of yySemanticOption before invoking yyuserAction, and then set - them back to their current values afterward. - (yyparse): Set yychar = YYEMPTY where yytoken = YYEMPTY. - (yyreportAmbiguity): Add /*ARGSUSED*/ to pacify lint. - * tests/glr-regression.at: Remove `.' from the ends of recent test case - titles for consistency. - (Leaked merged semantic value if user action cuts parse): In order to - suppress lint warnings, use arguments in merge function, and assign - char value < 128 in main. - (Incorrect lookahead during deterministic GLR): New test case. - (Incorrect lookahead during nondeterministic GLR): New test case. - -2006-01-06 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/c.m4 (b4_yy_symbol_print_generate): In yy_symbol_print, accept - !yyvaluep as signal that no semantic value is available to print. - * data/glr.c (yydestroyGLRState): If state is not resolved, don't try - to print a semantic value. - -2006-01-06 Joel E. Denny <jdenny@ces.clemson.edu> - - * tests/glr-regression.at: For consistency with my newer test cases, - don't thank myself. - -2006-01-05 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/glr.c (yyresolveValue): When merging semantic options, if at - least one user action succeeds but a later one cuts the parse, then - destroy the semantic value before returning rather than leaking it. - (yyresolveStates): If a user action cuts the parse and thus - yyresolveValue fails, ignore the (unset) semantic value rather than - corrupting the yyGLRState, and empty the semantic options list since - the user actions should have called all necessary destructors. - Simplify code with YYCHK. - * tests/glr-regression.at (Corrupted semantic options if user action - cuts parse): New test case. - (Undesirable destructors if user action cuts parse): New test case. - Before applying any of this patch, this test case never actually failed - for me... but only because the corrupted semantic options usually - masked this bug. - (Leaked merged semantic value if user action cuts parse): New test - case. - -2006-01-05 Akim Demaille <akim@epita.fr> - - * src/reader.c, src/symlist.h, src/symlist.c: s/mid_rule/midrule/. - -2006-01-04 Paul Eggert <eggert@cs.ucla.edu> - - * data/c.m4 (b4_c_modern): New macro, with a new provision for - _MSC_VER. Problem reported by Cenzato Marco. - (b4_c_function_def): Use it. - * data/yacc.c (YYMODERN_C): Remove. All uses replaced by - b4_c_modern. - (yystrlen, yystpcpy, yyparse): Use b4_c_function... macros rather - than rolling our own. - -2006-01-04 Akim Demaille <akim@epita.fr> - - Also warn about non-used mid-rule values. - * src/symlist.h, src/symlist.c (symbol_list): Add a mid_rule - member. - (symbol_list_new): Adjust. - * src/reader.c (symbol_typed_p): New. - (grammar_rule_check): Use it. - (grammar_midrule_action): Bind a mid-rule LHS to its rule. - Check its rule. - * tests/input.at (AT_CHECK_UNUSED_VALUES): New. - Use it. - * tests/actions.at (Exotic Dollars): Adjust. - -2006-01-04 Akim Demaille <akim@epita.fr> - - * src/reader.c (grammar_midrule_action): If $$ is set in a - mid-rule, move the `used' bit to its lhs. - * tests/input.at (Unused values): New. - * tests/actions.at (Exotic Dollars): Adjust: exp is not typed. - -2006-01-03 Paul Eggert <eggert@cs.ucla.edu> - - * doc/bison.texinfo (Bison Options): Say more accurately what - --yacc does. - * src/parse-gram.y (rules_or_grammar_declaration): Don't complain - about declarations in the grammar when in Yacc mode, as POSIX does - not require a diagnostic when the grammar uses extensions. - - * src/reduce.c (reduce_grammar): Remove unnecessary cast to bool. - - Warn about dubious constructions like "%token T T". - Reported by twlevo. - * src/symtab.h (struct symbol.declared): New member. - * src/symtab.c (symbol_new): Initialize it to false. - (symbol_class_set): New arg DECLARING, specifying whether - this is a declaration that we want to warn about, if there - is more than one of them. All uses changed. - - * data/glr.c, data/glr.cc, data/lalr1.cc, data/yacc.c: - Allow multiple %union directives, whose contents concatenate. - * src/parse-gram.y (grammar_declaration): Likewise. - Use muscle_code_grow, so that we don't need stype_line any more. - All uses changed. - - * src/muscle_tab.c (muscle_grow): Fix comment. - - * ChangeLog, data/c.m4, data/glr.c, data/glr.cc, data/location.cc: - * data/yacc.c, src/getargs.c, src/output.c, tests/cxx-type.at: - Update copyright year to 2006. - -2006-01-03 Akim Demaille <akim@epita.fr> - - Have glr.cc pass (some of) the calc.at tests. - * data/glr.cc (b4_parse_param_orig): New. - (b4_parse_param): Improve its definition, and bound it more - clearly in the skeleton. - (b4_epilogue): Append, instead of prepending, in order to keep - #line consistency. - Simplify the generation of auxiliary functions: locations and - purity are mandated. - (b4_global_tokens_and_yystype): Honor it. - * data/location.cc (c++.m4): Don't include it. - * tests/local.at (_AT_BISON_OPTION_PUSHDEFS): Define AT_GLR_CC_IF - and AT_SKEL_CC_IF. - * tests/calc.at (AT_CHECK_CALC): Rely on AT_SKEL_CC_IF instead of - AT_LALR1_CC_IF. - Be sure to initialize the first position's filename. - (AT_CHECK_CALC_LALR1_CC): Add %location and %defines, they are - mandated anyway. - (AT_CHECK_CALC_GLR_CC): New. - Use it to exercise glr.cc as a lalr1.cc drop-in replacement. - -2006-01-02 Akim Demaille <akim@epita.fr> - - * src/output.c (output_skeleton): Don't hard wire the inclusion of - c.m4. - * data/c++.m4, data/glr.c, data/yacc.c: Include c.m4. - * data/glr.cc: Do not include stack.hh. - -2006-01-02 Joel E. Denny <jdenny@ces.clemson.edu> - - * data/glr.c: Reformat whitespace with tabs. - (b4_lpure_formals): Remove this unused m4 macro. - * tests/cxx-type.at: Reformat whitespace with tabs. - (_AT_TEST_GLR_CXXTYPES): In union Node, rename node_info to nodeInfo - since it's a member. Rename type to isNterm for clarity. - -2005-12-29 Akim <akim@sulaco.local> - - Let glr.cc catch up with symbol_value_print. - * data/glr.cc (b4_yysymprint_generate): Replace by... - (b4_yy_symbol_print_generate): this. - (yy_symbol_print, yy_symbol_value_print): Declare them. - -2005-12-28 Paul Eggert <eggert@cs.ucla.edu> - - * src/location.h (boundary): Note that a line or column equal - to INT_MAX indicates an overflow. - * src/scan-gram.l: Include verify.h. Don't include get-errno.h. - (rule_length_overflow, increment_rule_length, add_column_width): - New functions. - (<INITIAL>{id}, <SC_ESCAPED_STRING>"\"", <SC_ESCAPED_CHARACTER>"'"): - (<SC_BRACED_CODE>"}"): - Use increment_rule_length rather than incrementing it by hand. - (adjust_location, handle_syncline): Diagnose overflow. - (handle_action_dollar, handle_action_at): - Fix bug with monstrosities like $-2147483648. - Remove now-unnecessary checks. - (scan_integer): Verify assumptions and remove now-unnecessary checks. - (convert_ucn_to_byte): Verify assumptions. - (handle_syncline): New arg LOC. All callers changed. - Don't store through a value derived from char const * pointer. - - * src/reader.c (grammar_rule_check): Rewrite slightly to avoid - GCC warnings. - -2005-12-27 Paul Eggert <eggert@cs.ucla.edu> - - * src/reader.c (grammar_midrule_action, grammar_symbol_append): - Remove unnecessary forward static decls. - -2005-12-27 Akim Demaille <akim@epita.fr> - - * src/reader.c (grammar_current_rule_check): Also check that $$ - is used. - Take the rule to check as argument, hence rename as... - (grammar_rule_check): this. - * src/reader.h, src/reader.c (grammar_rule_begin, grammar_rule_end): - Rename as... - (grammar_rule_begin, grammar_rule_end): these, for consistency. - (grammar_midrule_action, grammar_symbol_append): Now static. - * tests/torture.at (input): Don't rely on the default action - being always performed. - * tests/calc.at: "Set" $$ even when the action is "cut" with - YYERROR or other. - * tests/actions.at (Exotic Dollars): Instead of using unused - values, check that the warning is issued. - -2005-12-22 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Improve wording for unused-value warnings. - -2005-12-22 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc, data/yacc.c, data/glr.c, data/c.m4 - (b4_yysymprint_generate): Rename as... - (b4_yy_symbol_print_generate): this. - Generate yy_symbol_print instead of yysymprint. - Generate also yy_symbol_value_print, and use it. - -2005-12-22 Akim Demaille <akim@epita.fr> - - * NEWS: Warn about unused values. - * src/symlist.h, src/symlist.c (symbol_list, symbol_list_new): Add - a `used' member. - (symbol_list_n_get, symbol_list_n_used_set): New. - (symbol_list_n_type_name_get): Use symbol_list_n_get. - * src/scan-gram.l (handle_action_dollar): Flag used symbols. - * src/reader.c (grammar_current_rule_check): Check that values are - used. - * src/symtab.c (symbol_print): Accept 0. - * tests/existing.at: Remove the type information. - Empty the actions. - Remove useless actions (beware of mid-rule actions: perl -000 - -pi -e 's/\s*\{\}(?=[\n\s]*[|;])//g'). - * tests/actions.at (Exotic Dollars): Use unused values. - * tests/calc.at: Likewise. - * tests/glr-regression.at (No users destructors if stack 0 deleted): - Likewise. - - * src/gram.c (rule_useful_p, rule_never_reduced_p): Use - rule_useful_p. - -2005-12-21 Paul Eggert <eggert@cs.ucla.edu> - - Undo 2005-12-01 tentative license wording change. The wording is - still being reviewed by the lawyers, and we don't want to wait for - them before publishing a test release. For now, revert to the - previous wording. - * NEWS: Undo 2005-12-01 change. - * data/glr.c: Revert to previous license wording. - * data/glr.cc: Likewise. - * data/lalr1.cc: Likewise. - * data/location.cc: Likewise. - * data/yacc.c: Likewise. - - * NEWS: Reword %destructor vs YYABORT etc. - * data/glr.c: Use American spacing, for consistency. - * data/glr.cc: Likewise. - * data/lalr1.cc: Likewise. - * data/yacc.c: Likewise. - * data/yacc.c: Reformat comments slightly. - * doc/bison.texinfo: Replace "non-" with "non" when that makes sense, - for consistency. Fix some spelling errors and reword recently-included - text slightly. - * tests/cxx-type.at: Cast results of malloc, for C++. - -2005-12-21 Joel E. Denny <address@hidden> - - * tests/cxx-type.at: Construct a tree, count the parents of shared - nodes, and free each node once and only once. Previously, the memory - for semantic values was leaked instead. - -2005-12-21 Joel E. Denny <address@hidden> - - * data/glr.c (struct yyGLRStack): If pure, add yyval and yyloc members. - (yylval, yylloc): If pure, #define to yystackp->yyval and - yystackp->yyloc similar to yychar and yynerrs. - (yyparse): If pure, remove local yylval and yylloc. Add local - yystackp to accommodate pure definitions of yylval and yylloc. - (b4_lex_param, b4_lyyerror_args, b4_lpure_args): If pure, change - yylvalp and yyllocp to &yylval and &yylloc. - (nerrs, char, lval, lloc): If pure, add #define's for b4_prefix[] - namespace. Previously, nerrs and char were missing, but lval and lloc - weren't necessary. - (yyprocessOneStack, yyreportSyntaxError, yyrecoverSyntaxError): Remove - yylvalp and yyllocp parameters since, if pure, these are now always - accessible through yystackp. If not pure, they are still accessible - globally. - * data/glr.c, data/yacc.c (YYLLOC_DEFAULT): Change `if (N)' to - `if (YYID (N))' to pacify lint. - -2005-12-21 Akim Demaille <akim@epita.fr> - - YYACCEPT, YYERROR, and YYABORT, as user actions, should not - destroy the RHS symbols of a rule. - * data/yacc.c (yylen): Initialize to 0. - Keep its value to the number of items to possibly shift. - In particular, a regular successful parse that ends on YYFINAL by - a (internal) YYACCEPT must not have yylen != 0. - (yyerrorlab, yyreturn): Pop the RHS. - Reorder a bit to emphasize the `shifting' bits of code. - (YYPOPSTACK): Now accept a number of items to pop. - * data/lalr1.cc: Likewise. - * data/glr.c: Formatting changes. - Use goto instead of fall through. - * doc/bison.texinfo (Destructor Decl): Complete. - -2005-12-20 Juan Manuel Guerrero <juan.guerrero@gmx.de> - - * Makefile.am: DJGPP specific files added to EXTRA_DIST. - * djgpp/Makefile.maint: Fix PACKAGE variable computation. - * djgpp/config.bat: Replace every occurence of the file name - scan-gram-c.c with c-scan-gram.c. The same for scan-skel-c.c with - c-scan-skel.c to conform with the 8.3 file name restriction on MSDOS. - * djgpp/config.sed: Replace every occurence of the file name - scan-gram-c.c with c-scan-gram.c. The same for scan-skel-c.c with - c-scan-skel.c to conform with the 8.3 file name restriction on MSDOS. - * djgpp/djunpack.bat: DJGPP specific file. - * djgpp/fnchange.lst: DJGPP specific file. - * djgpp/README.in: Add new information about how to unpack the bison - source on MSDOS and other systems which have 8.3 file name restrictions - using djunpack.bat and fnchange.lst. - -2005-12-12 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap (build_cvs_prefix): Remove; unused. - (CVS_PREFIX): Adjust to yesterday's Savannah reorganization - when getting gnulib. - -2005-12-12 "Joel E. Denny" <jdenny@ces.clemson.edu> - - * data/glr.c: Reorder typedef declarations for structs to match order - of struct declarations. - Rename yystack everywhere to yystackp except in yyparse where it's not - a pointer. - (yyglrShift): Change parameter YYSTYPE yysval to YYSTYPE* yyvalp for - consistency. - (yyis_table_ninf): Change 0 to YYID (0) to pacify lint. - (yyreportSyntaxError): Add /*ARGSUSED*/ to pacify lint. - (yyparse): Change while (yytrue) to while ( YYID (yytrue)) to pacify - lint. - -2005-12-09 Paul Eggert <eggert@cs.ucla.edu> - - * tests/sets.at (Accept): Fix typos in regular expression used to - sed out the final state number. - - Work around portability problem on Solaris 10: flex-generated - files include <stdio.h> before <config.h>, which messes up - because the latter defines __EXTENSIONS__. Address the problem - by creating two new little files that include <config.h> first, - then include the flex-generated files. Rewrite everyone else - to include <config.h> first, as well. - * lib/timevar.c: Always include "config.h". - * src/Makefile.am (bison_SOURCES): Replace scan-gram.l with - scan-gram-c.c, and scan-skel.l with scan-skel-c.c. - (EXTRA_bison_SOURCES): New macro. - * src/scan-gram-c.c, src/scan-skel-c.c: New files. - * src/system.h: Don't include config.h. - * src/LR0.c: Include <config.h> first. - * src/assoc.c: Likewise. - * src/closure.c: Likewise. - * src/complain.c: Likewise. - * src/conflicts.c: Likewise. - * src/derives.c: Likewise. - * src/files.c: Likewise. - * src/getargs.c: Likewise. - * src/gram.c: Likewise. - * src/lalr.c: Likewise. - * src/location.c: Likewise. - * src/main.c: Likewise. - * src/muscle_tab.c: Likewise. - * src/nullable.c: Likewise. - * src/output.c: Likewise. - * src/parse-gram.y: Likewise. - * src/print.c: Likewise. - * src/print_graph.c: Likewise. - * src/reader.c: Likewise. - * src/reduce.c: Likewise. - * src/relation.c: Likewise. - * src/state.c: Likewise. - * src/symlist.c: Likewise. - * src/symtab.c: Likewise. - * src/tables.c: Likewise. - * src/uniqstr.c: Likewise. - * src/vcg.c: Likewise. - - * src/parse-gram.y: Fix minor problems uncovered by lint. - (current_lhs, current_lhs_location): Now static. - (current_assoc): Remove unused variable. - - Cleanups so that Bison-generated parsers have less lint. - * data/c.m4 (b4_yydestruct_generate, b4_yysymprint_generate): - Prepend /*ARGSUSED*/, for lint's sake. - * data/glr.c (YYUSE): Properly parenthesize, and use an alternate - definition if 'lint' is defined. - (YYID): New macro (or function, if lint). - All uses of /*CONSTCOND*/0 replaced by YYID(0). - * data/yacc.c: Likewise. - * data/glr.c (yyuserAction, yyuserMerge, yy_reduce_print): - (yyrecoverSyntaxError): Prepend /*ARGSUSED*/. - * data/glr.cc (YYLLOC_DEFAULT): Omit /*CONSTCOND*/ since this code - is C++ only. - * data/lalr1.cc (YYUSE): Just use a cast, since this code is C++ only. - * data/yacc.c (YYSTACK_FREE) [defined YYSTACK_ALLOC]: - Use YYID(0) rather than 0, for lint. - (yystrlen): Rewrite to avoid lint warning about ptrdiff_t overflow. - (yysyntax_error): Rewrite to avoid lint warnings about parenthesization. - -2005-12-07 Paul Eggert <eggert@cs.ucla.edu> - - * tests/glr-regression.at - (Improper handling of embedded actions and dollar(-N) in GLR parsers): - Close memory leak reported by twlevo. - -2005-12-06 "Joel E. Denny" <jdenny@ces.clemson.edu> - - * data/glr.c (yyprocessOneStack, yyparse): Synchronize the shift for - all stacks. - (yyparse): Iterate another stack in order to call user destructors. - * tests/glr-regression.at (No users destructors if stack 0 deleted): - New test case. - (Duplicated user destructor for lookahead): This test now is expected - to succeed. - -2005-12-01 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Document the following change. - * data/yacc.c: Say "parser skeleton" rather than "file", since - it's no longer just a file. - * data/glr.c: Grant a special exception for C GLR parsers, that - reads like the already-existing exception for C LALR(1) parsers. - * data/glr.cc: Likewise. - * data/lalr1.cc: Likewise. - * data/location.cc: Likewise. - * data/yacc.c: Reword the "written by" statement to clarify that - it was the parser skeleton, not the entire output file. - * data/glr.c: Written by Paul Hilfinger. - * data/glr.cc: Written by Akim Demaille. - * data/lalr1.cc: Likewise. - -2005-11-18 Paul Eggert <eggert@cs.ucla.edu> - - * data/yacc.c (yy_reduce_print, YY_REDUCE_PRINT): - Fix typos in previous change that broke 'make check'. - YY_REDUCE_PRINT cannot be a pseudo-varargs macro; that isn't - supported in C. - * tests/calc.at (_AT_CHECK_CALC,_AT_CHECK_CALC_ERROR): - Don't check NUM-STDERR-LINES, since the output format is fluctuating. - We can revert this once things settle down. - - * src/conflicts.c (conflicts_print): Don't print file name twice - when %expect fails because there were no conflicts. - * doc/bison.texinfo (Expect Decl): Tighten up wording in previous - change. - * tests/conflicts.at (%expect not enough, %expect too much): - (%expect with reduce conflicts): Adjust to new behavior. - -2005-11-18 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (conflicts_print): Unsatisfied %expectation are - errors. - * NEWS: Document this. - * doc/bison.texinfo (Expect Decl): Likewise. - -2005-11-16 Akim Demaille <akim@epita.fr> - - Generalize the display of semantic values and locations in traces. - * data/glr.c (yy_reduce_print): Fix indices (again). - * data/c++.m4 (b4_rhs_value, b4_rhs_location): Don't expect - literal integers. - * data/lalr1.cc (yyreduce_print): Rename as... - (yy_reduce_print): this. - Display values and locations. - * data/yacc.c (yy_reduce_print): Likewise. - (YY_REDUCE_PRINT): Adjust to pass the required arguments. - (yysymprint): Move higher to be visible from yy_reduce_print). - (yyparse): Adjust. - * tests/calc.at: Adjust the expected length of the traces. - -2005-11-14 Akim Demaille <akim@epita.fr> - - * data/glr.c (yy_reduce_print): The loop was quite wrong: type are - from 1 to N, while values and location start at 0. - (b4_rhs_location, b4_rhs_value): Add parens around $1 and $2. - -2005-11-14 Akim Demaille <akim@epita.fr> - - * data/glr.c (yy_reduce_print): Fix the $ number. - -2005-11-14 Akim Demaille <akim@epita.fr> - - "Use" parse parameters. - * data/c.m4 (b4_parse_param_for, b4_parse_param_use): New. - * data/glr.c, data/glr.cc: Use them. - * data/glr.c (YYUSE): Have a C++ definition that supports - non-pointer types. - -2005-11-14 Akim Demaille <akim@epita.fr> - - * data/glr.c (yyexpandGLRStack): Declare only if defined. - -2005-11-14 Akim Demaille <akim@epita.fr> - - * data/glr.cc: New. - * data/m4sugar/m4sugar.m4 (m4_prepend): New. - -2005-11-12 Akim Demaille <akim@epita.fr> - - Let position and location be PODs. - * data/location.cc (position::initialize, location::initialize): New. - (position::position, location::location): Define only if - b4_location_constructors is defined. - * data/lalr1.cc (b4_location_constructors): Define it for backward - compatibility. - * doc/bison.texinfo (Initial Action Decl): Use initialize. - -2005-11-12 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc: Move the body of the ctor and dtor into the - parser file (instead of the header). - Wrap the implementations in a "namespace yy". - -2005-11-12 Akim Demaille <akim@epita.fr> - - Have glr.c include its header file when created. - * data/glr.c (b4_shared_declarations): New. - Output them verbatim in the parser if !%defines, otherwise - output then in the header file, and include it instead. - -2005-11-11 Akim Demaille <akim@epita.fr> - - * data/glr.c: Comment changes. - -2005-11-11 Akim Demaille <akim@epita.fr> - - When yydebug, report semantic and location values for reductions. - * data/glr.c (yy_reduce_print): Report the semantic values and the - locations. - (YY_REDUCE_PRINT): Adjust. - (yyglrReduce): Use them. - (b4_rhs_value, b4_rhs_location): Remove m4_eval invocations. - * data/c.m4 (b4_yysymprint_generate): Specify the const arguments. - * tests/calc.at (_AT_CHECK_CALC_ERROR): Remove the reduction - traces. - -2005-11-10 Akim Demaille <akim@epita.fr> - - * data/glr.c (yynewGLRStackItem, YY_RESERVE_GLRSTACK): New. - (yyaddDeferredAction, yyglrShift, yyglrShiftDefer): Use them. - (yyexpandGLRStack, YYRELOC): Define only when YYSTACKEXPANDABLE. - -2005-11-09 Albert Chin-A-Young <china@thewrittenword.com> - - * m4/cxx.m4, examples/Makefile.am: Don't build - examples/calc++ if no C++ compiler is available. (trivial change) - -2005-11-09 Akim Demaille <akim@epita.fr> - - * src/scan-skel.l: Use a couple of asserts. - -2005-11-03 Akim Demaille <akim@epita.fr> - - In some (weird) cases, the final state number is incorrect. - Reported by Alexandre Duret-Lutz. - * src/LR0.c (state_list_append): Remove the computation of - final_state. - (save_reductions): Do it here. - (get_state): Alpha conversion. - (generate_states): Use a for loop. - * src/gram.h (item_number_is_rule_number) - (item_number_is_symbol_number): New. - * src/state.c: Use assert. - * src/system.h: Include assert.h. - * tests/sets.at (Accept): New. - -2005-10-30 Paul Hilfinger <hilfingr@tully.CS.Berkeley.EDU> - - * data/glr.c (yyfill): Adjust comment. - (yyresolveAction): Initialize default location properly - for empty right-hand sides. - (yydoAction): Ditto. - Add comment explaining apparently dead code. - * tests/glr-regression.at - (Incorrectly initialized location for empty right-hand side in GLR): - New test. - -2005-10-30 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap (cleanup_gnulib): New function. Use it to clean up - gnulib when interrupted. This fixes some race conditions and - works around some portability problems (one noted by Paul - Hilfinger). - -2005-10-22 Akim <akim@epita.fr> - - * Makefile.cfg: Adjust to config -> build-aux. - Reported by twledo. - -2005-10-21 Akim Demaille <akim@epita.fr> - - * data/c.m4 (b4_yydestruct_generate, b4_yysymprint_generate): Pass - the %parse-params. - * data/glr.c (YY_SYMBOL_PRINT, yydestroyGLRState): Adjust. - * data/yacc.c (b4_Pure_if): Rename as... - (b4_yacc_pure_if): this. - (YY_SYMBOL_PRINT, yyparse): Adjust. - * doc/bison.texinfo: Formatting changes. - -2005-10-21 Akim Demaille <akim@epita.fr> - - Finish the transition config -> build-aux. - * configure.ac, Makefile.am: Use build-aux. - * config/prev-version, config/announce-gen, config/Makefile.am: - Move to... - * build-aux/prev-version, build-aux/announce-gen, - * build-aux/Makefile.am: here. - -2005-10-14 Akim Demaille <akim@epita.fr> - - * examples/calc++/test: Use set -x only when VERBOSE. - -2005-10-13 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Bison now warns if it finds a stray `$' or `@' in an action. - * src/scan-gram.l (<SC_BRACED_CODE>[$@]): Implement this. - -2005-10-13 Akim Demaille <akim@epita.fr> - - * src/scan-skel.l: Output the base name parts of the parser and - header file names. - * tests/output.at (AT_CHECK_OUTPUT): Support subdirectories, and - additional checks. - Use this to exercise C++ outputs in subdirs. - Reported by Oleg Smolsky. - -2005-10-12 Paul Eggert <eggert@cs.ucla.edu> - - * data/c.m4 (b4_c_function_def): Look at __C99_FUNC__, not at - __STDC_VERSION__, as IBM cc 7.0 doesn't define the latter either. - Problem reported by John P. Hartmann. - * data/yacc.c (YYMODERN_C): Likewise. Don't define if the user has - already defined it. - -2005-10-12 Akim Demaille <akim@epita.fr> - - * src/parse-gram.y (version_check): Exit 63 to please missing - (stands for "version mismatch). - * tests/input.at, doc/bison.texinfo: Adjust. - -2005-10-10 Paul Eggert <eggert@cs.ucla.edu> - - Work around portability problems with Visual Age C compiler - (xlc and xlC_r) reported by John P. Hartmann. - * data/location.cc (initial_column, initial_line): Remove. - All uses replaced by 0 and 1. - * src/scan-gram.l (gram_wrap): Redefine to avoid bug in flex 2.5.31 - that xlc complains about. - * src/scan-skel.l (skel_wrap): Likewise. - * data/c.m4 (b4_c_function_def): Look at __STDC_VERSION__ as well - as __STDC__. - * data/yacc.c (YYMODERN_C): New macro, which also looks at - __STDC_VERSION__. Use it everywhere instead of looking at - __STDC__ and __cplusplus. - -2005-10-10 Akim Demaille <akim@epita.fr> - - * examples/calc++/test: Be quiet unless VERBOSE. - -2005-10-05 Paul Eggert <eggert@cs.ucla.edu> - - * data/c.m4 (yydestruct, yysymprint): - Use YYUSE instead of casting to void. - * data/glr.c (YYUSE): New macro. - (yyuserMerge, yyreportAmbiguity, yyreportSyntaxError): - Use it instead of rolling our own. - (YYLLOC_DEFAULT, YYCHK, YYDPRINTF, YY_SYMBOL_PRINT, YY_REDUCE_PRINT): - (YYCHK1): - Use /*CONSTCOND*/ to suppress lint warnings. - * data/lalr1.cc (YYLLOC_DEFAULT, YY_SYMBOL_PRINT, YY_REDUCE_PRINT): - (YY_STACK_PRINT): Use 'false' not '0'. - (YYUSE): New macro. - (yysymprint_, yydestruct_): Use it instead of rolling our own. - * data/yacc.c (YYUSE): New macro. - (YYCOPY, YYSTACK_RELOCATE, YYBACKUP, YYLLOC_DEFAULT): - (YYDPRINTF, YY_SYMBOL_PRINT, YY_STACK_PRINT, YY_REDUCE_PRINT): - (yyerrorlab): Use /*CONSTCOND*/ to suppress lint warnings. - - - * data/m4sugar/m4sugar.m4 (_m4_map): New macro. - (m4_map, m4_map_sep): Use it. Handle the empty list correctly. - -2005-10-04 Paul Eggert <eggert@cs.ucla.edu> - - Undo the parts of the unlocked-I/O change that substituted - putc or puts for printf. This might hurt performance a bit, - but some people prefer the printf style. - * data/c.m4 (yysymprint): Prefer printf to puts and putc. - * data/glr.c (YYFPUTC, YYFPUTS, YYDPUTS): Remove. - All uses replaced by YYFPRINTF and YYDPRINTF. - * data/yacc.c: Likewise. - * lib/bitset.c (bitset_print): Likewise. - * lib/bitsetv.c (bitsetv_dump, debug-bitsetv): Prefer printf to - putc and puts. - * lib/lbitset.c (debug_lbitset): Likewise. - * src/closure.c (print_firsts, print_fderives): Likewise. - * src/gram.c (grammar_dump): Likewise. - * src/lalr.c (look_ahead_tokens_print): Likewise. - * src/output.c (escaped_output): Likewise. - (user_actions_output): Break apart two printfs. - * src/parse-gram.y (%printer): Prefer printf to putc and puts. - * src/reduce.c (reduce_print): Likewise. - * src/state.c (state_rule_look_ahead_tokens_print): Likewise. - * src/system.h: Include unlocked-io.h rathe than stdio.h. - - * data/glr.c (yyuserMerge, yyreportAmbiguity, yyreportSyntaxError): - Use assignments rather than casts-to-void to suppress - unused-variable warnings. This pacifies 'lint'. - * data/lalr1.cc (yysymprint_, yydestruct_): Use a call to suppress - unused-variable warnings. - -2005-10-03 Juan Manuel Guerrero <juan.guerrero@gmx.de> - - * Makefile.am: DJGPP specific files added to EXTRA_DIST. - -2005-10-02 Paul Eggert <eggert@cs.ucla.edu> - - Use unlocked I/O for a minor performance improvement on hosts like - GNU/Linux and Solaris that support unlocked I/O. The basic idea - is to use the gnlib unlocked-io module, and to prefer putc and - puts to printf when either will work (since the latter doesn't - come in an unlocked flavor). - * bootstrap (gnulib_modules): Add unlocked-io. - * data/c.m4 (yysymprint): Prefer puts and putc to printf. - * data/glr.c (YYFPUTC, YYFPUTS, YYDPUTS): New macros. - Prefer them to YYFPRINTF and YYDPRINTF if either will do, - and similarly for puts and putc and printf. - * data/yacc.c: Likewise. - * lib/bitset.c (bitset_print): Likewise. - * lib/bitset.h [USE_UNLOCKED_IO]: Include unlocked-io.h. - * lib/bitsetv.c (bitsetv_dump, debug-bitsetv): Prefer putc and puts - to printf. - * lib/lbitset.c (debug_lbitset): Likewise. - * src/closure.c (print_firsts, print_fderives): Likewise. - * src/gram.c (grammar_dump): Likewise. - * src/lalr.c (look_ahead_tokens_print): Likewise. - * src/output.c (escaped_output): Likewise. - (user_actions_output): Coalesce two printfs. - * src/parse-gram.y (%printer): Prefer putc and puts to printf. - * src/reduce.c (reduce_print): Likewise. - * src/state.c (state_rule_look_ahead_tokens_print): Likewise. - * src/system.h: Include unlocked-io.h rather than stdio.h. - - * data/lalr1.cc: Don't put an unmatched ' in a dnl comment, as - this confuses xgettext. - -2005-10-02 Akim Demaille <akim@epita.fr> - - * bootstrap (gnulib_modules): Add strverscmp. - * lib/.cvsignore: Add strverscmp.c, strverscmp.h. - * m4/.cvsignore: Add strverscmp.m4. - * src/parse-gram.y (%require): New token, new rule. - (version_check): New. - * src/scan-gram.l (%require): Adjust. - * tests/input.at (AT_REQUIRE): New. - Use it. - * doc/bison.texinfo (Require Decl): New. - (Calc++ Parser): Use %require. - -2005-10-02 Akim Demaille <akim@epita.fr> - - * data/location.cc: New. - -2005-10-02 Paul Eggert <eggert@cs.ucla.edu>, - Akim Demaille <akim@epita.fr> - - Make sure -odir/foo.cc creates dir/location.hh etc. - * src/files.h (spec_outfile, parser_file_name, spec_name_prefix) - (spec_file_prefix, spec_verbose_file, spec_graph_file) - (spec_defines_file): Now const. - (dir_prefix): New. - (short_base_name): Remove. - * src/files.c: Adjust. - (dirname.h): Include. - (base_name): Don't prototype it. - (finput): Remove, duplicates gram_in. - (full_base_name, short_base_name): Replace by... - (all_but_ext, all_but_tab_ext): these. - (compute_base_names): Rename as... - (compute_file_name_parts): this. - Update to compute the new variables, including dir_prefix. - Adjust dependencies. - * src/output.c (prepare): Output them. - * src/reader.c: Adjust to use gram_in, not finput. - * src/scan-skel.l (@dir_prefix@): New. - -2005-10-02 Juan Manuel Guerrero <juan.guerrero@gmx.de> - - * lib/subpipe.c: New function end_of_output_subpipe() added - to allow support for non-posix systems. This is a no-op function - for posix systems. - - * lib/subpipe.h: New function end_of_output_subpipe() added - to allow support for non-posix systems. This is a no-op function - for posix systems. - - * src/output.c (output_skeleton): Use end_of_output_subpipe() to - handle the lack of pipe/fork functionality on non-posix systems. - - * djgpp/Makefile.maint: DJGPP specific file. - - * djgpp/README.in: DJGPP specific file. - - * djgpp/config.bat: DJGPP specific configuration file. - - * djgpp/config.sed: DJGPP specific configuration file. - - * djgpp/config.site: DJGPP specific configuration file. - - * djgpp/config_h.sed: DJGPP specific configuration file. - - * djgpp/subpipe.c: DJGPP specific replacement file for lib/subpipe.c. - - * djgpp/subpipe.h: DJGPP specific replacement file for lib/subpipe.h. - -2005-10-02 Akim Demaille <akim@epita.fr> - - * data/location.cc: New, extract from... - * data/lalr1.cc: here. - (location.hh): Include it after the user prologue, in case the - filename type is defined by the user. - Forward declation location and position before the pre-prologue. - (yyresult_): Rename as... - (yyresult): this, it's a local variable, not an attribute. - * data/Makefile.am (dist_pkgdata_DATA): Adjust. - -2005-10-01 Akim Demaille <akim@epita.fr> - - * examples/extexi: Restore the #line generation. - -2005-09-30 Akim Demaille <akim@epita.fr>, - Alexandre Duret-Lutz <adl@gnu.org> - - Move the token type and YYSTYPE in the parser class. - * data/lalr1.cc (stack.hh, location.hh): Include earlier. - (parser::token): New, from the moved free definition of tokens. - (parser::semantic_value): Now a full definition instead of an - indirection to YYSTYPE. - (b4_post_prologue): No longer included in the header file, but - in the implementation file. - * doc/bison.texi (C+ Language Interface): Update. - * src/parse-gram.y: Support unary %define. - * tests/actions.at: Define global_tokens_and_yystype for backward - compatibility until we update the tests. - * tests/calc.at: Idem. - (first_line, first_column, last_line, last_column): Define for lalr1.cc - to simplify the code. - -2005-09-29 Paul Eggert <eggert@cs.ucla.edu> - - Port to SunOS 4.1.4, which lacks strtoul and strerror. - Ah, the good old days! Problem reported by Peter Klein. - * bootstrap (gnulib_modules): Add strerror, strtoul. - * lib/.cvsignore: Add strerror.c, strtol.c, strtoul.c - * m4/.cvsignore: Add strerror.m4, strtol.m4, strtoul.m4. - -2005-09-29 Akim Demaille <akim@epita.fr> - - * data/c.m4 (b4_error_verbose_if): New. - * data/lalr1.cc: Use it. - (YYERROR_VERBOSE_IF): Remove. - (yyn_, yylen_, yystate_, yynerrs_, yyerrstatus_): Remove as - parser members, replaced by... - (yyn, yylen, yystate, yynerss, yyerrstatus): these parser::parse - local variables. - (yysyntax_error_): Takes the state number as argument. - (yyreduce_print_): Use the argument yyrule, not the former - attribute yyn_. - -2005-09-26 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap (gnulib_modules): Add verify. - * lib/.cvsignore: Add verify.h. - * src/getargs.c: Use ARGMATCH_VERIFY rather than verify. - * src/system.h (verify): Remove. - Include verify.h instead. - * src/tables.c (tables_generate): Use new API for 'verify'. - -2005-09-21 Paul Eggert <eggert@cs.ucla.edu> - - * tests/local.at (_AT_BISON_OPTION_PUSHDEFS): Do not use - local variables whose names begin with 'yy'. - * tests/calc.at (_AT_DATA_CALC_Y): Likewise. - Trivial changes from Joel E. Denny. - - * bootstrap (gnulib_modules): Remove alloca. Bison doesn't need - it itself. - * src/main.c (main) [C_ALLOCA]: Don't flush alloca'ed memory; we - don't use alloca any more. - - * data/yacc.c [YYSTACK_USE_ALLOCA && !defined __GNUC__ && ! defined - __BUILTIN_VA_ARG_INCR && ! defined _AIX && ! defined _MSC_VER && - defined _ALLOCA_H]: Don't include <stdlib.h>; not needed in this case. - * tests/torture.at (Exploding the Stack Size with Alloca): Adjust - to match yacc.c, to test more hosts. - -2005-09-20 Paul Eggert <eggert@cs.ucla.edu> - - * data/yacc.c (YYSIZE_T): Reindent to make it clearer. This - doesn't affect behavior. - (YYSTACK_ALLOC) [YYSTACK_USE_ALLOCA]: Improve support for - Solaris, AIX, MSC. - (_STDLIB_H): Renamed from YYINCLUDED_STDLIB_H. All uses changed. - This works a bit better with glibc, if user code has already included - stdlib.h. - * doc/bison.texinfo (Bison Parser): Document that users can't - arbitrarily use malloc and free for other purposes. Document - that <alloca.h> and <malloc.h> might be included. - (Table of Symbols): Under YYSTACK_USE_ALLOCA, Don't claim that the - user must declare alloca. - - * HACKING (release): Forwarn the Translation Project about - stable releses. - -2005-09-20 Akim Demaille <akim@epita.fr> - - * data/glr.c: Use b4_token_enums, not b4_token_enums_defines. - -2005-09-19 Paul Eggert <eggert@cs.ucla.edu> - - * data/yacc.c (YYSIZE_MAXIMUM): New macro. - (YYSTACK_ALLOC_MAXIMUM): Use it. - (yysyntax_error): New function. - (yyparse) [YYERROR_VERBOSE]: Don't leak memory indefinitely if - multiple syntax errors are reported, and alloca is being used. - Instead, reallocate buffers twice as big each time, so that - we waste at most half the allocated memory. Start with a small - (128-byte) buffer that will suffice in most cases anyway. - Use yysyntax_error to do most of the work. - - * doc/bison.texinfo (Error Reporting, Table of Symbols): - yynerrs is the number of errors reported, not the number of - errors encountered. - - * tests/glr-regression.at (Duplicated user destructor for lookahead): - Mark it as expected to fail. - Cast result of malloc; problem reported by twlevo@xs4all.nl. - * tests/actions.at, tests/calc.at, tests/glr-regression.at: - Don't start user-code symbols with "yy", to avoid name space problems. - -2005-09-19 Akim Demaille <akim@epita.fr> - - Remove the traits, failed experiment. - It never proved useful, and anyway because of the current - definition, it was not possible to have several specialization of - this traits, making it useless. - * data/lalr1.cc (yy:traits): Remove. - Inline its definitions in the parser class. - -2005-09-19 Akim Demaille <akim@epita.fr> - - * tests/atlocal.in (LIBS): Pass INTLLIBS to address failures on at - least Mac OSX with a /usr/local install of gettext. - -2005-09-19 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (yyparse): Rename yylooka and yyilooka as yychar - and yytoken for similarity with the other skeletons. - -2005-09-19 Akim Demaille <akim@epita.fr> - - * NEWS, configure.ac: update version number to 2.1a. - -2005-09-16 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Version 2.1. - - * NEWS: Remove notice of yytname change, since it was never in an - official release. - * data/glr.c (yydestroyGLRState): Rename local var to avoid shadowing - diagnostic. - * src/output.c (prepare): Likewise. - * data/lalr1.cc (YYERROR_VERBOSE_IF): New macro. - (yysyntax_error_): Use it to avoid GCC warning when YYERROR_VERBOSE - is not defined. This is an awful hack, but it's enough for now. - All callers changed. - * tests/glr-regression-at (make_value): Args are const pointers now, - to avoid GCC warning. - (Duplicated user destructor for lookahead): New test. Currently - skipped. It fails on my host but I'm not sure it'll always fail. - -2005-09-16 Akim Demaille <akim@epita.fr> - - * src/symtab.h (struct symbol): Declare the printer and destructor - as const, to avoid accidental calls to free. - (symbol_destructor_set, symbol_printer_set): Adjust. - * src/symtab.c: Adjust. - -2005-09-16 Akim Demaille <akim@epita.fr> - - * data/c.m4 (b4_token_enums): New. - (b4_token_defines): Rename as... - (b4_token_enums_defines): this. - (b4_token_defines): New, output only the #defines. - * data/yacc.c, data/glr.c: Adjust. - * data/lalr1.cc: Use b4_token_enums instead of b4_token_enums_defines. - * data/c.m4 (b4_yydestruct_generate, b4_yysymprint_generate): Define - as default values. - -2005-09-16 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (yylex_): Remove, inline its code. - (yyreport_syntax_error_): Remove, replaced by... - (yysyntax_error_): this which returns a string and leaves to the - caller the call to the users' error function. - (yylooka_, yyilooka_, yylval, yylloc, yyerror_range_, yyval, yyloc): - Move from members of the parser object... - (yylooka, yyilooka, yylval, yylloc, yyerror_range, yyval, yyloc): - to local variables of the parse function. - -2005-09-16 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Calc++ Parser): Don't promote defining YYEOF - since it's in Bison's name space. - -2005-09-15 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (yyresolveValue): Add default case to pacify - gcc -Wswitch-default. Problem reported by twlevo@xs4all.nl. - - * NEWS: Document when yyparse started to return 2. - * doc/bison.texinfo (Parser Function): Document when yyparse - returns 2. - - * data/lalr1.cc: Revert part of previous change, as it's incompatible. - (b4_filename_type): Renamed back from b4_file_name_type. All uses - changed. - (class position): file_name -> filename (reverting). All uses changed. - -2005-09-14 Paul Eggert <eggert@cs.ucla.edu> - - * examples/calc++/Makefile.am ($(calc_sources_generated)): Don't - do anything if $@ exists. This reverts part of the 2005-07-07 - patch. - -2005-09-11 Paul Eggert <eggert@cs.ucla.edu> - - * Makefile.am (EXTRA_DIST): Do not distribute REFERENCES; it - contains obsolete information and isn't worth distributing as a - separate file anyway. - * data/glr.c [defined YYSETJMP]: Don't include <setjmp.h>. - (YYJMP_BUF, YYSETJMP, YYLONGJMP) [!defined YYSETJMP]: New macros. - All uses of jmp_buf, setjmp, longjmp changed to use these instead. - (yyparse): Abort if user code uses longjmp to throw an unexpected - value. - -2005-09-09 Paul Eggert <eggert@cs.ucla.edu> - - * data/c.m4 (b4_identification): Define YYBISON_VERSION. - Suggested by twlevo@xs4all.nl. - - * data/glr.c (YYCHK1): Do not assume YYE is in range. - This avoids a diagnostic from gcc -Wswitch-enum. - Problem reported by twlevo@xs4all.nl. - - * doc/bison.texinfo: Don't use "filename", as per GNU coding - standards. Use "file name" or "file" or "name", depending on - the context. - (Invocation): The output of "bison hack/foo.y" goes to foo.tab.c, - not to hack/foo.tab.c. - (Calc++ Top Level): 2nd arg of main is not const. - * data/glr.c: b4_filename -> b4_file_name. - * data/lalr1.cc: Likewise. Also, b4_filename_type -> b4_file_name_type. - All uses changed. - (class position): filename -> file_name. All uses changed. - * data/yacc.c: b4_filename -> b4_file_name. - * lib/bitset.h: filename -> file_name in local vars. - * lib/bitset_stats.c: Likewise. - * src/files.c: Likewise. - * src/scan-skel.l ("@output ".*\n): Likewise. - * src/files.c (file_name_split): Renamed from filename_split. - * src/muscle_tab.c (muscle_init): Output b4_file_name, not b4_filename. - -2005-09-08 Paul Eggert <eggert@cs.ucla.edu> - - * lib/.cvsignore: Add pipe-safer.c, stdio--.h, unistd--.h, - to accommodate latest gnulib. - - * tests/glr-regression.at (Duplicate representation of merged trees): - Add casts to pacify g++. Problem reported by twlevo@xs4all.nl. - - * bootstrap: Add comment as to why the AM_LANGINFO_CODESET hack is - needed. - -2005-08-26 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (yydestroyGLRState): Renamed from yydestroyStackItem. - All uses changed. Invoke user destructor after an error during a - split parse (trivial change from Joel E. Denny). - - * tests/glr-regression.at - (User destructor after an error during a split parse): New test case. - Problem reported by Joel E. Denny in: - http://lists.gnu.org/archive/html/bison-patches/2005-08/msg00029.html - -2005-08-25 Paul Eggert <eggert@cs.ucla.edu> - - * README-cvs: Give URLs for recommended tools. - Mention Gzip version problem, and bootstrapping issues. - Remove troubleshooting section, as it's somewhat obsolete. - - * bootstrap (no_cache): New var, to accommodate different wget - variants. Use it instead of '-C off'. Problem reported by - twlevo@xs4all.nl. - - * data/glr.c (yydestroyStackItem): New function. - (yyrecoverSyntaxError, yyreturn): Use it to improve quality of - debugging information. Problem reported by Joel E. Denny. - -2005-08-25 Akim Demaille <akim@epita.fr> - - * tests/local.at (AT_COMPILE_CXX): Pass $LINKS too. - -2005-08-24 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (yyrecoverSyntaxError, yyreturn): - Don't invoke destructor on unresolved entries. - * tests/glr-regression.at - (User destructor for unresolved GLR semantic value): New test case. - Problem reported by Joel E. Denny in: - http://lists.gnu.org/archive/html/bison-patches/2005-08/msg00016.html - -2005-08-21 Paul Eggert <eggert@cs.ucla.edu> - - * lib/.cvsignore: Remove realloc.c, strncasecmp.c, xstrdup.c. - Add strnlen.c. - * m4/.cvsignore: Remove codeset.m4, gettext.m4, lib-ld.m4, - lib-prefix.m4, po.m4. - - * data/glr.c (yyreturn): Use "Cleanup:" rather than "Error:" - in yydestruct diagnostic, since it might not be an error. - Problem reported by Joel Denny near end of - <http://lists.gnu.org/archive/html/help-bison/2005-07/msg00040.html>. - * data/lalr1.cc (yyerturn): Likewise. - * data/yacc.c (yyreturn): Likewise. - * tests/calc.at (_AT_CHECK_CALC_ERROR): Adjust to the above change. - - * src/files.c: Remove obsolete FIXME comment. - - * data/glr.c (YY_SYMBOL_PRINT): Append a newline, for consistency - with the other templates, and to fix bogus run-on messages such - as the one reported at the end of - <http://lists.gnu.org/archive/html/help-bison/2005-07/msg00040.html>. - All callers changed to avoid the newline. - (yyprocessOneStack): Output two lines rather than one, to accommodate - the above change. This changes the debug output format slightly. - - * data/glr.c (yyresolveValue): Fix redundant parse tree problem - reported by Joel E. Denny in - <http://lists.gnu.org/archive/html/bison-patches/2005-08/msg00004.html> - (trivial change). - * tests/glr-regression.at (Duplicate representation of merged trees): - New test, from Joel E. Denny in: - <http://lists.gnu.org/archive/html/help-bison/2005-07/msg00013.html>. - * THANKS: Add Joel E. Denny. - - * configure.ac (AC_INIT): Bump to 2.0c. - -2005-07-24 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Version 2.0b. - - * Makefile.am (SUBDIRS): Put examples before tests, so that - "make check" doesn't finish with "All 1 tests passed". - - * tests/regression.at (Token definitions): Don't rely on - AT_PARSER_CHECK for data that contains backslashes. It currently - uses 'echo', and 'echo' isn't portable if its argument contains - backslashes. Problem found on OpenBSD 3.4. Also, do not assume - that the byte '\0xff' is not printable in the C locale; it is, - under OpenBSD 3.4 (!). Luckily, '\0x80' through '\0x9e' are - not printable, so use '\0x81' to test. - - * data/glr.c (YYOPTIONAL_LOC): Define even if it's not a recent - version of GCC, since the macro is used with non-GCC compilers. - - Fix core dump reported by Pablo De Napoli in - <http://lists.gnu.org/archive/html/bug-bison/2005-07/msg00053.html>. - * tests/regression.at (Invalid inputs with {}): New test. - * src/parse-gram.y (token_name): Translate type before using - it as an index. - - * data/glr.c (ATTRIBUTE_UNUSED): Remove, since it infringes on - the user's name space. All uses changed to __attribute__ - ((__unused__)). - (yyFail, yyMemoryExhausted, yyreportAmbiguity): - Add __attribute__ ((__noreturn__)). - - * etc/clcommit: Remove. We weren't using it, and it failed - "make maintainer-distcheck". - * Makefile.maint: Merge from coreutils. - (CVS_LIST, CVS_LIST_EXCEPT): New macros. - (syntax-check-rules): Change list of rules as described below. - (sc_cast_of_alloca_return_value, sc_dd_max_sym_length): - (sc_file_system, sc_obsolete_symbols, sc_prohibit_atoi_atof): - (sc_prohibit_jm_in_m4, sc_root_tests, sc_tight_scope): - (sc_trailing_space): New rules. - (sc_xalloc_h_in_src): Remove. - (sc_cast_of_argument_to_free, sc_cast_of_x_alloc_return_value): - (sc_space_tab, sc_error_exit_success, sc_changelog): - (sc_system_h_headers, sc_sun_os_names, sc_unmarked_diagnostics): - (makefile-check, po-check, author_mark_check): - (makefile_path_separator_check, copyright-check): - Use grep -n, to make it easier to find violations. - Use CVS_LIST and CVS_LIST_EXCEPT. - (header_regexp, h_re): Remove. - (dd_c): New macro. - (sc_dd_max_sym_length, .re-list, news-date-check): New rules. - (my-distcheck): Use more-modern GCC flags. - (signatures, %.asc): Remove. - (rel-files, announcement): Remove signatures. - Restore old updating code, even though we don't use it, so - that we're the same as coreutils. - (alpha, beta, major): Depend on news-date-check. - Make the upload commands. - - * data/c.m4, data/lalr1.cc, data/yacc.c: Normalize white space. - * lib/abitset.h, lib/bbitset.h, lib/bitset.h: Likewise. - * lib/bitset_stats.c, lib/ebitset.h, lib/lbitset.c: Likewise. - * lib/libitset.h, lib/timevar.c, lib/vbitset.h: Likewise. - * src/Makefile.am, src/gram.c, src/muscle_tab.h: Likewise. - * src/parse-gram.y, src/system.h, src/tables.c, src/vcg.c: Likewise. - * src/vcg_defaults.h, tests/cxx-type.at, tests/existing.at: Likewise. - * tests/sets.at: Likewise. - - * data/m4sugar/m4sugar.m4: Sync from Autoconf, except that - we comment out the Autoconf version number. - * doc/bison.texinfo (Calc++ Scanner): Don't use atoi, as - it's error-prone and "make maintainer-distcheck" rejects it. - - * lib/subpipe.c: Include <fcntl.h> without checking for HAVE_FCNTL_H. - Indent calls to "error" to pacify "make maintainer-distcheck", - when the calls are not intended to be translated. - * m4/subpipe.m4 (BISON_PREREQ_SUBPIPE): Don't check for fcntl.h. - - * src/Makefile.am (DEFS): Use +=, to pacify - "make maintainer-distcheck". - (bison_SOURCES): Add scan-skel.h. - (sc_tight_scope): New rule, from coreutils. - - * src/files.c (src_extension, header_extension): - Now static, not extern. - * src/getargs.c (short_options): Likewise. - * src/muscle_tab.c (muscle_table): Likewise. - * src/parse-gram.y (current_class, current_type, current_prec): - Likewise. - * src/reader.c (grammar_end, previous_rule_end): Likewise. - * src/getargs.h: Redo comments to pacify "make maintainer-distcheck". - * src/main.c (main): Cast bindtextdomain and textdomain calls to - void, to avoid warning when NLS is disabled. - * src/output.c: Include scan-skel.h. - (scan_skel): Remove decl, since scan-skel.h does this. - (output_skeleton): - Indent calls to "error" to pacify "make maintainer-distcheck". - * src/print_graph.c: Don't include <obstack.h>, as system.h does this. - * src/reader.h (gram_end, gram_lineno): New decls to pacify - "make maintainer-distcheck". - * src/scan-skel.l (skel_lex, skel_get_lineno, skel_get_in): - (skel_get_out, skel_get_leng, skel_get_text, skel_set_lineno): - (skel_set_in, skel_set_out, skel_get_debug, skel_set_debug): - (skel_lex_destroy, scan_skel): Move these decls to... - * src/scan-skel.h: New file. - * src/uniqstr.c (uniqstr_assert): - Indent calls to "error" to pacify "make maintainer-distcheck". - - * tests/Makefile.am ($(srcdir)/package.m4): Use $(VAR), - not @VAR@. - - * tests/torture.at: Revamp to avoid misuse of atoi that - "make maintainer-distcheck" complained about. - - * examples/extexi (message): Don't print a message more than once, - and omit line-number decoration that makes Emacs compile think - that informative messages are worth worrying about. - -2005-07-22 Paul Eggert <eggert@cs.ucla.edu> - - * configure.ac: Update version number. - - * Makefile.am (SUBDIRS): Add examples; somehow this got removed - accidentally. - * examples/calc++/calc++-parser.yy: Remove from CVS, as it's - autogenerated by the maintainer. - * examples/calc++/.cvsignore: Add *.yy. - - * lib/bitset.c (bitset_alloc): Don't cast xcalloc result. - * lib/bitset_stats.c (bitset_stats_init): Likewise. - * lib/bitsetv.c (bitsetv_alloc): Likewise. - - * po/POTFILES.in: Add lib/xalloc-die.c; remove lib/xmalloc.c. - - * src/relation.c (relation_transpose): Rewrite to avoid bogus complaint - from maintainer-distcheck about casting the argument of 'free'. - - * NEWS: Mention recent yytname changes. - * THANKS: Add Anthony Heading, twlevo@xs4all.nl. - - * bootstrap: For translations that have not yet been upgraded to - the new runtime-po domain, prime the pump by extracting the - relevant strings from the obsolete translations. This code can be - removed once the bison-runtime domain has been translated by each - team. - - * src/scan-gram.l (<SC_PRE_CODE>.): Don't double-quote token names, - now that token names are already quoted. - - Fix problem reported by Anthony Heading. - * data/glr.c (YYTOKEN_TABLE): New macro. - (yytname): Define if YYTOKEN_TABLE. - * data/yacc.c (YYTOKEN_TABLE, yytname): Likewise. - * data/lalr1.cc (YYTOKEN_TABLE, yytname_): Likewise. - (YYERROR_VERBOSE): Define the same way the other skeletons do. - * src/output.c (prepare_symbols): Output token_table_flag. - -2005-07-21 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (yyinitGLRStack, yyreturn): Don't call malloc - again if the first call fails. - - * data/glr.c (yytnamerr): New function. - (yyreportSyntaxError): Use it to dequote most string literals. - * data/lalr1.c (yytname_): Renamed from yyname_, for compatibility - with other skeletons. All uses changed. - (yytnameerr_): New function. - (yyreport_syntax_error): Use it to dequote most string literals. - * data/yacc.c (yytnamerr): New function. - (yyerrlab): Use it to decode most string literals. - * doc/bison.texinfo (Decl Summary, Calling Convention): - Clarify quoting convention of yytname. - * src/output.c (prepare_symbols): Quote all names. This undoes - the 2005-04-17 change, which is now accomplished (mostly) via - changes in the parsers as described above. - * tests/regression.at (Token definitions, Web2c Actions): - Undo most 2005-04-17 change here, too. - -2005-07-20 Paul Eggert <eggert@cs.ucla.edu> - - Fix more problems reported by twlevo@xs4all.nl. - * tests/cxx-type.at: Don't pipe output of ./types through sed to - remove trailing spaces. This loses the exit status of ./types, - and isn't needed since ./types shouldn't be emitting trailing - spaces. - * data/glr.c (yyreturn): Don't pop stack if yyinitStateSet failed, - as the stack isn't valid in that case. - - * src/scan-gram.l (gram_get_lineno, gram_get_in, gram_get_out): - (gram_get_leng, gram_get_text, gram_set_lineno, gram_set_in): - (gram_set_out, gram_get_debug, gram_set_debug, gram_lex_destroy): - Add declarations to pacify "gcc -Wmissing-prototypes" when flex 2.5.31 - is used. - * src/scan-skel.l (skel_get_lineno, skel_get_in, skel_get_out): - (skel_get_leng, skel_get_text, skel_set_lineno, skel_set_in): - (skel_set_out, skel_get_debug, skel_set_debug, skel_lex_destroy): - Likewise. - - * tests/cxx-type.at (_AT_TEST_GLR_CXXTYPES): Work even with - overly-picky compilers that reject 'char *foo = "bar";'. - - * src/symtab.c (SYMBOL_ATTR_PRINT, symbol_print): Direct output - to FILE * parameter, not to stderr. This fixes a typo introduced - in the 2005-07-12 change. - - * lib/subpipe.c (create_subpipe): Rewrite slightly to avoid - warnings from GCC 4. - - * data/glr.c (yyexpandGLRStack, yyaddDeferredAction, yyexpandGLRStack): - (yyglrShiftDefer, yysplitStack): - Remove unused parameters b4_pure_formals. All uses changed. - (yyglrShift): Remove unused parameters b4_user_formals. - All uses changed. - (yyglrReduce): Removed unused parameter yylocp. All uses changed. - -2005-07-18 Paul Eggert <eggert@cs.ucla.edu> - - Destructor cleanups and regularization among the three skeletons. - * NEWS: Document the behavior changes. - * data/glr.c (yyrecoverSyntaxError): Don't bother to pop the - stack before failing, as the cleanup code will do it for us now. - * data/lalr1.cc (yyerrlab): Likewise. - * data/glr.c (yyparse): Pop everything off the stack before - freeing it, so that destructors get called properly. - * data/lalr1.cc (yyreturn): Likewise. - * data/yacc.c (yyreturn): Pop and destroy the start symbol, too. - This is more consistent. - * doc/bison.texinfo (Destructor Decl): Mention more reasons - why destructors might be called. 1.875 -> 2.1. - (Destructor Decl, Decl Summary, Table of Symbols): - Some English-language cleanups for %destructor. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): - Add output line for destructor of start symbol. - * tests/calc.at (AT_CHECK_CALC): Add one to line counts, - because of that same extra output line. - - * NEWS: Document minor wording changes in diagnostics of - Bison-generated parsers. - * data/glr.c (yyMemoryExhausted): Renamed from yyStackOverflow. - Remove unused formals. All uses changed. - (yyreportAmbiguity): "ambiguity detected" -> "syntax is ambiguous". - (yyparse): Rename yyoverflowlab to yyexhaustedlab. - * data/yacc.c (yyparse): "parser stack overflow" -> "memory exhausted". - Rename yyoverflowab to yyexhaustedlab. - When memory exhaustion occurs during syntax-error reporting, - report it separately rather than in a single diagnostic; this - eases translation. - * doc/bison.texinfo (Memory Management): Renamed from Stack Overflow. - (Memory Exhausted): Renamed from Parser Stack Overflow. - Revamp wording slightly to prefer "memory exhaustion". - * tests/actions.at: "parser stack overflow" -> "memory exhausted". - - * data/c.m4 (b4_yysymprint_generate): Use YYFPRINTF, not fprintf. - - Add i18n support to the GLR skeleton. Partially fix the C++ - skeleton; a C++ expert needs to finish this. Remove debugging - msgids; there's little point to having them translated, since they - can be understood only by someone who can read the - (English-language) source code. - - Generate runtime-po/bison-runtime.pot automatically, so that we - don't have to worry about garbage getting in that file. We'll - make sure after the next official release that old msgids don't - get lost. See - <http://lists.gnu.org/archive/html/bison-patches/2005-07/msg00119.html>. - - * runtime-po/Makefile.in.in, runtime-po/bison-runtime.pot: Remove. - Now auto-generated. - * PACKAGING: Don't claim that Gawk, GCC, Perl use this method yet. - Fix typos in explanations of the runtime file. - * bootstrap: Change gettext keyword from YYI18N to YY_. - Use standard Makefile.in.in in runtime-po, since we'll arrange - for backward-compatible bison-runtime.po files in a different way. - * data/glr.c (YY_): New macro, from yacc.c. - (yyuserAction, yyreportAmbiguity, yyreportSyntaxError, yyparse): - Translate messages intended for users. - (yyreportSyntaxError): Change "virtual memory" to "memory" to match - the wording in the other skeletons. We don't know that the memory - is virtual. - * data/lalr1.cc (YY_): Renamed from _. All uses changed. - Use same method that yacc.c uses. - Don't translate debugging messages. - (yy::yyreport_syntax_error): Put in a FIXME for the i18n stuff; - it doesn't work (yet), and requires C++ expertise to fix. - * data/yacc.c (YY_): Renamed from YY18N. All uses changed. - Move defn to a more logical place, to be consistent with other - skeletons. - Don't translate debugging messages. - Don't assume line numbers fit in unsigned int; use unsigned long fmts. - * doc/bison.texinfo: Mention <libintl.h>. Change glibc cross reference - to gettext cross reference. Add indexing terms. Mention YYENABLE_NLS. - * runtime-po/POTFILES.in: Add data/glr.c, data/lalr1.cc. - - Fix yyerror / yylex test glitches noted by twlevo@xs4all.nl. - * tests/cxx-type.at (_AT_TEST_GLR_CXXTYPES): Have yyerror return - void, not int. - * tests/glr-regression.at (Badly Collapsed GLR States): - Likewise. - (Improper handling of embedded actions and dollar(-N) in GLR parsers): - yylex should return 0 at EOF rather than aborting. - - Improve tests for stack overflow in GLR parser. - Problem reported by twlevo@xs4all.nl. - * data/glr.c (struct yyGLRStack): Remove yyerrflag member. - All uses removed. - (yyStackOverflow): Just longjmp, but with value 2 so that caller - can handle the problem. - (YYCHK1): Use goto (a la yacc.c) rather than setting a flag. - (yyparse): New local variable yyresult to record the result. - Use result of setjmp to set it, rather than storing itinto - struct. - (yyDone): Remove label. - (yyacceptlab, yyabortlab, yyoverflowlab, yyreturn): New labels, - to mimic yacc.c. Do not discard lookahead if it's EOF (possible - if YYABORT is used). - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Exit with - yyparse status; put status > 1 into diagnostic. - Check that status==2 works. - * tests/calc.at, tests/cxx-type.at, tests/glr-regression.at: - Use exit status 3 for failure to open (which shouldn't happen). - -2005-07-17 Paul Eggert <eggert@cs.ucla.edu> - - * tests/conflicts.at (%nonassoc and eof): Don't exit with status - 1 on syntax error; just let yyparse do its thing. - * tests/glr-regression.at (Badly Collapsed GLR States): Likewise. - * tests/torture.at (AT_DATA_STACK_TORTURE): Likewise. - (Exploding the Stack Size with Alloca): - (Exploding the Stack Size with Malloc): - Expect exit status 2, not 1, since the parser is supposed to blow - its stack. Problem reported by twlevo@xs4all.nl. - - * data/glr.c (yyparse): Don't assume that the initial calls - to YYMALLOC succeed; in that case, yyparse incorrectly returned 0. - Print a stack-overflow message and fail instead. - Initialize the line-number information before creating the stack, - so that the stack-overflow message can report line zero safely. - -2005-07-14 Paul Eggert <eggert@cs.ucla.edu> - - Fix problems reported by twlevo@xs4all.nl. - * data/glr.c (YYSTACKEXPANDABLE): Don't define if already defined. - (yyuserMerge): Provide a default case if b4_mergers is empty. - * tests/cxx-type.at (_AT_TEST_GLR_CXXTYPES): Define YYSTACKEXPANDABLE. - * tests/glr-regression.at - (Improper handling of embedded actions and dollar(-N) in GLR parsers): - Add casts to pacify C++ compilers. - * tests/glr-regression.at (Improper merging of GLR delayed action - sets): Declare yylex before using it. - * tests/Makefile.am (maintainer-check-g++): Fix a stray - $(GXX) that escaped the renaming of GXX to CXX. Remove bogus - test for valgrind; valgrind is independent of g++. - (maintainer-check-posix): Add _POSIX2_VERSION=200112, to check - for compatibility with POSIX 1003.1-2001 (if running coreutils). - * tests/cxx-type.at (_AT_TEST_GLR_CXXTYPES): Port to stricter C++. - Use a destructor, so that we can expand the stack. Change - YYSTYPE to char * so that we can free it. Cast result of malloc. - -2005-07-13 Paul Hilfinger <hilfingr@CS.Berkeley.EDU> - - * data/glr.c (yyuserAction): Fix uninitialized variable that caused - a valgrind failure. Problem reported by twlevo@xs4all.nl. - -2005-07-13 Paul Eggert <eggert@cs.ucla.edu> - - * PACKAGING: New file, suggested by Bruno Haible and taken from - similar wording in gettext's PACKAGING file. - * NEWS: Mention PACKAGING. - * Makefile.am (EXTRA_DIST): Add PACKAGING. - -2005-07-12 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Document recent i18n improvements. - * bootstrap: Get runtime translations into runtime-po. - Create runtime-po files automatically, if possible. - * configure.ac: Invoke BISON_I18N, so that we eat our own dog food. - * data/yacc.c: Rewrite inclusion of <libintl.h> so that ENABLE_NLS - does not infringe on the user's name space. - (YYENABLE_NLS): Renamed from ENABLE_BISON_NLS. - * doc/bison.texinfo (Internationalization): Revamp the English - and Texinfo syntax a bit, to try to make it clearer. - (Bison Options, Option Cross Key): Mention --print-localedir. - * m4/bison-i18n.m4 (BISON_I18N): Rename ENABLE_BISON_NLS to - YYENABLE_NLS. Quote a bit more. - * runtime-po/.cvsignore: New file. - * runtime-po/Makefile.in.in (mostlyclean): Remove *.old.pot. - * runtime-po/Rules-quot: Remove; now created by bootstrap. - * runtime-po/quot.sed: Likewise. - * runtime-po/boldquot.sed: Likewise. - * runtime-po/en@quot.header: Likewise. - * runtime-po/en@boldquot.header: Likewise. - * runtime-po/insert-header.sin: Likewise. - * runtime-po/remove-potcdate.sin: Likewise. - * runtime-po/Makevars: Likewise. - * runtime-po/LINGUAS: Likewise. - * runtime-po/de.po: Likewise; we will rely on the translation project - to maintain this, so "bootstrap" should get it. - * src/getarg.c (PRINT_LOCALEDIR_OPTION): Let the C compiler determine - its value. - * src/main.c (main): Bind the bison-runtime domain, too. - -2005-07-12 Bruno Haible <bruno@clisp.org> - - * data/yacc.c: Include <libintl.h> when NLS is enabled. - (YYI18N): Renamed from _. Use dgettext when NLS is enabled. - * po/POTFILES.in: Remove autogenerated file src/parse-gram.c. - * runtime-po: New directory. - * runtime-po/Makefile.in.in: New file, copied from po/, with modified - $(DOMAIN).pot-update rule, so that old messages are never dropped. - * runtime-po/Rules-quot: New file, copied from po/. - * runtime-po/quot.sed: Likewise. - * runtime-po/boldquot.sed: Likewise. - * runtime-po/en@quot.header: Likewise. - * runtime-po/en@boldquot.header: Likewise. - * runtime-po/insert-header.sin: Likewise. - * runtime-po/remove-potcdate.sin: Likewise. - * runtime-po/Makevars: New file. - * runtime-po/POTFILES.in: New file. - * runtime-po/LINGUAS: New file. - * runtime-po/bison-runtime.pot: New file. - * runtime-po/de.po: New file. - * m4/bison.m4: New file. - * Makefile.am (SUBDIRS): Add runtime-po. - (aclocaldir, aclocal_DATA): New variables. - * configure.ac: Add AC_CONFIG_FILES of runtime-po/Makefile.in. - Define aclocaldir. - * src/getargs.c (usage): Document --print-localedir option. - (PRINT_LOCALEDIR_OPTION): New enum item. - (long_options): Add --print-localedir option. - (getargs): Handle --print-localedir option. - * doc/bison.texinfo (Bison Parser): Remove paragraph about _(). - (Internationalization): New section. - -2005-07-12 Akim Demaille <akim@epita.fr> - - * src/symtab.h, src/symtab.c (symbol_print): Swap the arguments, - for consistency with the rest of the code. - * src/symlist.h, src/symlist.c (symbol_list_print): Ditto. - Add separators. - -2005-07-12 Akim Demaille <akim@epita.fr> - - * src/parse-gram.y: Use %printer instead of YYPRINT. - -2005-07-12 Akim Demaille <akim@epita.fr> - - * src/symtab.h, src/symtab.c (symbol_print): New. - * src/symlist.h, src/symlist.c (symbol_list_print): New. - * src/symlist.c (symbol_list_n_type_name_get): Report the culprit. - -2005-07-12 Akim Demaille <akim@epita.fr> - - * data/glr.c (b4_syncline): Fix (swap) the definitions of - b4_at_dollar and b4_dollar_dollar. - -2005-07-11 Paul Eggert <eggert@cs.ucla.edu> - - * doc/bison.texinfo (Mystery Conflicts): Add reference to DeRemer - and Pennello's paper. - -2005-07-09 Paul Eggert <eggert@cs.ucla.edu> - - * data/yacc.c (yyparse): Undo previous patch. Instead, - set yylsp[0] and yyvsp[0] only if the initial action - sets yylloc and yylval, respectively. - - * data/yacc.c (yyparse): In the initial action, set - yylsp[0] and yyvsp[0] rather than yylloc and yylval. - This avoids the use of undefined variables if the initial - action does not set yylloc and/or yylval. - -2005-07-07 Paul Eggert <eggert@cs.ucla.edu> - - * examples/calc++/calc++-driver.cc, examples/calc++/calc++-driver.hh: - * examples/calc++/calc++-scanner.ll, examples/calc++/calc++.cc: - Remove from CVS. These files are automatically generated. - * examples/extexi: Clarify that this file is now part of Bison, - not GNU M4, and that it works with any POSIX-compatible Awk. - * examples/calc++/Makefile.am (run_extexi): Remove; not used. - ($(calc_extracted)): Renamed from $(calc_sources_extracted), - so that we also get calc++-parser.yy. Geneate it. - Use $(AWK), not gawk, since any conforming Awk will do. - Put comment before action, since older 'make' can't handle comment - in action. - $(BUILT_SOURCES): List all built sources, not just some of them. - $(MAINTAINERCLEANFILES): Remove *.stamp, and all built sources. - $($(srcdir)/calc++-parser.stamp): Work even if POSIXLY_CORRECT. - $($(calc_sources_generated)): Remove unnecessary test for existence - of target. (This had a shell syntax error anyway; a stray "x".) - (calc_extracted): List $(srcdir)/calc++-parser.yy, not - calc++-parser.yy. - * examples/.cvsignore, examples/calc++/.cvsignore: New files. - - * bootstrap (gnulib_modules): Add gettext, now that it's no longer - implied by the other modules. - -2005-07-06 Akim Demaille <akim@epita.fr> - - Bind examples/calc++ to the package. - * examples/calc++/Makefile: Remove, replaced by... - * examples/calc++/Makefile.am: ... this new file. - * examples/calc++/test: Remove input. - * examples/calc++/compile: Remove. - * examples/Makefile.am: New. - * configure.ac, Makefile.am: Adjust. - * doc/Makefile.am (clean-local): New, for more recent texi2dvis. - -2005-07-05 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (yyFail): Drastically simplify; since the format argument - never had any % directives, we can simply pass it to yyerror. - (yyparse): Use "t a; a=b;" rather than "t a = b;" when a will - be modified later, as that is the usual style in glr.c. - Problems reported by Paul Hilfinger. - - Rewrite GLR parser to catch more buffer overrun, storage exhaustion, - and size overflow errors. - * data/glr.c: Include <stdio.h> etc. after user prolog, not before, - in case the user prolog sets feature-test macros like _GNU_SOURCE. - (YYSIZEMAX): New macro. - (yystpcpy): New function, taken from yacc.c. - (struct yyGLRStack.yyspaceLeft): Now size_t, not int. - (yyinitGLRStack, yyfreeGLRstack): Remove unnecessary forward decls, - so that we don't have to maintain their signatures. - (yyFail): Check for buffer overflow, by using vsnprintf rather - than vsprintf. Allocate a bigger buffer if possible. - Report an error if buffer allocation fails. - (yyStackOverflow): New function. - (yyinitStateSet, yyinitGLRStack): Return a boolean indicating whether - the initialization was successful. It might fail if storage was - exhausted. - (yyexpandGLRStack): Add more checks for storage allocation failure. - Use yyStackOverflow to report failures. - (yymarkStackDeleted, yyglrShift, yyglrShiftDefer, yydoAction): - (yysplitStack, yyprocessOneStack, yyparse, yypstack): - Don't assume stack number fits in int. - (yysplitStack): Check for storage allocation failure. - (yysplitStack, yyprocessOneStack): Add pure_formals, so that we - can print diagnostics on storage allocation failure. All callers - changed. - (yyresolveValue): Use yybool for boolean. - (yyreportSyntaxError): Check for size-calculation overflow. - This code is taken from yacc.c. - (yyparse): Check for storage allocation errors when allocating - the initial stack. - -2005-07-05 Akim Demaille <akim@epita.fr> - - Extract calc++ from the documentation. - * doc/bison.texinfo (Calc++): Add the extraction marks. - * examples/extexi: New, from the aborted GNU Programming 2E. - Separate the different paragraph of a file with empty lines. - * examples/Makefile: Use it to extract the whole calc++ example. - -2005-06-24 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (C++ Parser Interface): Use defcv to define - class typedefs. - -2005-06-22 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (C++ Language Interface): First stab. - (C++ Parsers): Remove. - -2005-06-22 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (yylex_): Honor %lex-param. - -2005-06-22 Akim Demaille <akim@epita.fr> - - Start a set of simple examples. - * examples/calc++/Makefile, examples/calc++/calc++-driver.cc, - * examples/calc++/calc++-driver.hh, - * examples/calc++/calc++-parser.yy, - * examples/calc++/calc++-scanner.ll, examples/calc++/calc++.cc, - * examples/calc++/compile, examples/calc++/test: New. - -2005-06-09 Paul Eggert <eggert@cs.ucla.edu> - - * data/yacc.c (malloc, free) [defined __cplusplus]: Wrap inside - extern "C" {}. This fixes a problem reported by Paul Hilfinger, - which stems from the 2005-05-27 patch. - -2005-06-06 Paul Hilfinger <hilfingr@tully.CS.Berkeley.EDU> - - * data/glr.c: Modify treatment of unused parameters to permit use - of g++ (which doesn't allow __attribute__ ((unused)) for parameters). - -2005-05-30 Paul Eggert <eggert@cs.ucla.edu> - - Fix infringement on user name space reported by Janos Zoltan Szabo. - * data/yacc.c (yyparse): strlen -> yystrlen. - -2005-05-30 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (_): New. - Translate the various messages. - -2005-05-27 Paul Eggert <eggert@cs.ucla.edu> - - Fix infringement on user name space reported by Bruno Haible. - * data/yacc.c (YYSIZE_T): Define first, so that later decls can use it. - Prefer GCC's __SIZE_TYPE__ if available, so that we don't infringe on - the user's name space. - (alloca): Include <stdlib.h> to get it, if it's not built in. - (YYMALLOC, YYFREE): Define only if needed. - (malloc, free): Declare, but only if needed, as this infringes on - the user name space. - -2005-05-25 Paul Eggert <eggert@cs.ucla.edu> - - Fix BeOS, FreeBSD, MacOS porting problems reported by Bruno Haible. - * lib/bitset.c (bitset_print): Don't assume size_t can be printed - with %d format. - * lib/ebitset.c (min, max): Undef before defining. - * lib/vbitset.c (min, max): Likewise. - * lib/subpipe.c (create_subpipe): Save local variables in case - vfork clobbers them. - -2005-05-24 Bruno Haible <bruno@clisp.org> - - * tests/synclines.at (AT_SYNCLINES_COMPILE): Add support for the - error message syntax used by gcc-4.0. - -2005-05-23 Paul Eggert <eggert@cs.ucla.edu> - - * README: Mention m4 1.4.3. Remove obsolete advice about - Sun Forte Developer 6 update 2, VMS, and MS-DOS. - - * bootstrap: Remove workaround for problem I encountered with - gettext 0.14.1; it seems to be fixed now. - -2005-05-22 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Version 2.0a. - - * src/files.c: Include "stdio-safer.h"; this fixes a typo in - the previous change. - - Various maintainer cleanups. - * .cvsignore: Add a.exe, a.out, b.out,, conf[0-9]*, confdefs*, - conftest*, for benefit of CVS commands run at the same time as - "configure". Add build-aux, since "bootstrap" now creates it and - its subfiles. - * Makefile.cfg (move_if_change): Remove. - * Makefile.maint: Remove the update stuff; we now use "bootstrap". - (ftp-gnu, www-gnu, move_if_change, local_updates, update): - (po_repo, do-po-update, po-update, wget_files, get-targets): - (config.guess-url_prefix, config.sub-url_prefix): - (ansi2knr.c-url_prefix, texinfo.tex-url_prefix): - (standards.texi-url_prefix, make-stds.texi-url_prefix, taget, url): - ($(get-targets), cvs-files, automake_repo, wget-update, cvs-update): - Remove. - * configure.ac (AC_CONFIG_AUX_DIR): Change from config to build-aux; - this is now the recommended name. - * config/.cvsignore: Remove config.guess, config.rpath, config.sub, - depcomp, install-sh, mdate-sh, missing, mkinstalldirs, texinfo.tex, - ylwrap. These files now go into build-aux. - * config/move-if-change: Remove. - * config/prev-version.txt: Bump from 1.75 to 2.0. - - * bootstrap: Add stdio-safer, unistd-safer modules. - Remove m4/glibc2.m4 (introduced by latest gnulib, but - we don't need it). - * lib/.cvsignore: Add dup-safer.c, fd-safer.c, - fopen-safer.c, stdio-safer.h, unistd-safer.h. - * lib/subpipe.c: Include "unistd-safer.h". - (create_subpipe): Make sure all the newly-created - file descriptors are > 2, so that diagnostics don't - get sent down them (which might cause Bison to hang, in theory). - * m4/.cvsignore: Add stdio-safer.m4, unistd-safer.m4. - * src/files.c (xfopen): Use fopen_safer, not fopen. - - * data/lalr1.cc (yy::]b4_parser_class_name[::parse): Port - yesterday's yacc.c fix. - -2005-05-21 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c, data/lalr1.cc: Update copyright date. - - Fix a destructor bug reported by Wolfgang Spraul in - <http://lists.gnu.org/archive/html/bug-bison/2005-05/msg00042.html>. - * data/yacc.c (yyabortlab): Don't call destructor, and - don't set yychar to EMPTY. - (yyoverflowlab): Don't call destructor. - (yyreturn): Call destructor, if yychar is neither YYEOF nor YYEMPTY. - * tests/calc.at (AT_CHECK_CALC): Expect one fewer output lines, - since we no longer output the message "discarding lookahead token - end of input ()". - -2005-05-20 Paul Hilfinger <hilfingr@CS.Berkeley.EDU> - - * data/glr.c (YY_SYMBOL_PRINT): Don't print newline at end to - fix a small glitch in debugging output. - (yyprocessOneStack, yyrecoverSyntaxError, yyparse): Print newline - after YY_SYMBOL_PRINT where needed. - - (struct yyGLRState): Add some comments. - (struct yySemanticOption): Add some comments. - (union yyGLRStackItem): Add comment. - - (yymergeOptionSets): Correct this to properly perform the union, - avoiding infinite reported by Michael Rosien. - Update comment. - - * tests/glr-regression.at: Add test for GLR merging error reported - by M. Rosien. - -2005-05-13 Paul Eggert <eggert@cs.ucla.edu> - - * COPYING, ChangeLog, GNUmakefile, HACKING, Makefile.am, - Makefile.cfg, Makefile.maint, NEWS, README, README-alpha, - README-cvs, TODO, bootstrap, configure.ac, data/Makefile.am, - data/README, data/c.m4, data/glr.c, data/lalr1.cc, data/yacc.c, - data/m4sugar/m4sugar.m4, doc/Makefile.am, doc/bison.texinfo, - doc/fdl.texi, doc/gpl.texi, doc/refcard.tex, lib/Makefile.am, - lib/abitset.c, lib/abitset.h, lib/bbitset.h, lib/bitset.c, - lib/bitset.h, lib/bitset_stats.c, lib/bitset_stats.h, - lib/bitsetv-print.c, lib/bitsetv-print.h, lib/bitsetv.c, - lib/bitsetv.h, lib/ebitset.c, lib/ebitset.h, lib/get-errno.c, - lib/get-errno.h, lib/lbitset.c, lib/lbitset.h, lib/libiberty.h, - lib/main.c, lib/subpipe.c, lib/subpipe.h, lib/timevar.c, - lib/timevar.def, lib/timevar.h, lib/vbitset.c, lib/vbitset.h, - lib/yyerror.c, m4/cxx.m4, m4/m4.m4, m4/subpipe.m4, m4/timevar.m4, - m4/warning.m4, src/LR0.c, src/LR0.h, src/Makefile.am, src/assoc.c, - src/assoc.h, src/closure.c, src/closure.h, src/complain.c, - src/complain.h, src/conflicts.c, src/conflicts.h, src/derives.c, - src/derives.h, src/files.c, src/files.h, src/getargs.c, - src/getargs.h, src/gram.c, src/gram.h, src/lalr.c, src/lalr.h, - src/location.c, src/location.h, src/main.c, src/muscle_tab.c, - src/muscle_tab.h, src/nullable.c, src/nullable.h, src/output.c, - src/output.h, src/parse-gram.c, src/parse-gram.h, - src/parse-gram.y, src/print.c, src/print.h, src/print_graph.c, - src/print_graph.h, src/reader.c, src/reader.h, src/reduce.c, - src/reduce.h, src/relation.c, src/relation.h, src/scan-gram.l, - src/scan-skel.l, src/state.c, src/state.h, src/symlist.c, - src/symlist.h, src/symtab.c, src/symtab.h, src/system.h, - src/tables.c, src/tables.h, src/uniqstr.c, src/uniqstr.h, - src/vcg.c, src/vcg.h, src/vcg_defaults.h, tests/Makefile.am, - tests/actions.at, tests/c++.at, tests/calc.at, tests/conflicts.at, - tests/cxx-type.at, tests/existing.at, tests/glr-regression.at, - tests/headers.at, tests/input.at, tests/local.at, tests/output.at, - tests/reduce.at, tests/regression.at, tests/sets.at, - tests/synclines.at, tests/testsuite.at, tests/torture.at: - Update FSF postal mail address. - -2005-05-11 Paul Eggert <eggert@cs.ucla.edu> - - * tests/local.at (AT_COMPILE_CXX): Treat LDFLAGS like AT_COMPILE does. - Problem reported by Ralf Menzel. - -2005-05-01 Paul Eggert <eggert@cs.ucla.edu> - - * tests/actions.at: Test that stack overflow invokes destructors. - From Marcus Holland-Moritz. - * data/yacc.c (yyerrlab): Move the code that destroys the stack - from here.... - (yyreturn): to here. That way, destructors are called properly - even if the stack overflows, or the user calls YYACCEPT or - YYABORT. Stack-overflow problem reported by Marcus Holland-Moritz. - (yyoverflowlab): Destroy the lookahead. - -2005-04-24 Paul Eggert <eggert@cs.ucla.edu> - - * data/yacc.c (YYSTACK_ALLOC_MAXIMUM): Add more-descriptive comment. - -2005-04-17 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Bison-generated C parsers no longer quote literal strings - associated with tokens. - * src/output.c (prepare_symbols): Don't escape strings, - since users don't want to see C escapes. - * tests/calc.at (AT_CHECK_CALC): Adjust to lack of quotes - in diagnostics. - * tests/input.at (Torturing the Scanner): Likewise. - * tests/regression.at (Token definitions, Web2c Actions): Likewise. - -2005-04-16 Paul Eggert <eggert@cs.ucla.edu> - - * tests/torture.at (AT_INCREASE_DATA_SIZE): Skip the test if - the data size is known to be too small and we can't increase it. - This works around an HP-UX 11.00 glitch reported by Andrew Benham. - -2005-04-15 Paul Eggert <eggert@cs.ucla.edu> - - * src/parse-gram.y: Include quotearg.h. - (string_as_id): Quote $1 before using it as a key, since the - lexer no longer quotes it for us. - (string_content): Don't strip quotes, since lexer no longer - quotes it for us. - * src/scan-gram.l: Include quotearg.h. - ("\""): Omit quote. - ("'"<SC_ESCAPED_CHARACTER>): Quote symbol before using it as - a key, since the rest of the lexer doesn't quote it. - * src/symtab.c (symbol_get): Don't quote symbol; caller does it now. - * tests/regression.at (Token definitions): Check for backslashes - in token strings. - - * data/yacc.c (YYSTACK_ALLOC_MAXIMUM): New macro. - (YYSIZE_T): Define to unsigned long int when using an older compiler. - (yyparse): Revamp code to generate long syntax error message, to - make it easier to translate, and to avoid problems with arithmetic - overflow. Change "virtual memory" to "memory" in diagnostic, since - we don't know whether the memory is virtual. - -2005-04-13 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Bison-generated C parsers now use the _ macro to - translate strings. - * data/yacc.c (_) [!defined _]: New macro. - All English strings wrapped inside this macro. - * doc/bison.texinfo (Bison Parser): Document _. - * po/POTFILES.in: Include src/parse-gram.c, since it now - includes translateable strings that parse-gram.y doesn't. - -2005-04-12 Paul Eggert <eggert@cs.ucla.edu> - - * src/symtab.c (symbol_make_alias): Call symbol_type_set, - reverting the 2004-10-11 change to this function. - (symbol_check_alias_consistency): Don't call symbol_type_set - if the type name is already correct. - * tests/input.at (Typed symbol aliases): New test, from Tim Van Holder. - -2005-03-25 Paul Eggert <eggert@cs.ucla.edu> - - * tests/regression.at (Token definitions): Don't use a token named - c, as that generates a "#define c ..." that runs afoul of buggy - stdlib.h that uses the identifier c as a member of struct - drand48_data. Problem reported by Horst Wente. - -2005-03-21 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap: Change translation URL from - http://www2.iro.umontreal.ca/~gnutra/po/maint/bison/ to - http://www.iro.umontreal.ca/translation/maint/bison/ to avoid - redirection glitches. Problem reported by twlevo@xs4all.nl. - -2005-03-20 Paul Eggert <eggert@cs.ucla.edu> - - * tests/local.at (AT_COMPILE, AT_COMPILE_CXX): Don't put options - after operands; POSIX says this isn't portable for the c99 command. - -2005-03-18 Paul Eggert <eggert@cs.ucla.edu> - - * tests/glr-regression.at (glr-regr2a.y): Try to dump core - immediately if a data overrun has occurred; this may help us track - down what may be a spurious failure on MacOS. - -2005-03-17 Paul Eggert <eggert@cs.ucla.edu> - - Respond to problems reported by twlevo@xs4all.nl. - - * bootstrap: Use "trap - 0" rather than the unportable "trap 0". - - * src/vcg.h: Comment fix. - * src/vcg_defaults.h: Parenthesize macro bodies to make them safe. - (G_CMAX): Change to -1 instead of INT_MAX. - - * data/yacc.c (yyparse): Omit spaces before #line. - -2005-03-15 Paul Eggert <eggert@cs.ucla.edu> - - * src/tables.c (state_number_to_vector_number): Put it inside an - "#if 0", since it's not currently used. Problem reported by - Roland McGrath. - -2005-03-06 Paul Eggert <eggert@cs.ucla.edu> - - * src/output.c (escaped_output): Renamed from - escaped_file_name_output, since we now use it for symbol tags as - well. All uses changed. - (symbol_destructors_output, symbol_printers_output): - Escape symbol tags too. - Problem reported by Matyas Forstner in - <http://lists.gnu.org/archive/html/bug-bison/2005-03/msg00009.html>. - - * src/muscle_tab.c (muscle_code_grow): Don't quote numbers; it's - not needed. - * src/output.c (user_actions_output, token_definitions_output, - symbol_destructors_output, symbol_printers_output): Likewise. - * src/reader.c (prologue_augment): Likewise. - * src/scan-gram.l (handle_action_dollar, handle_action_at): Likewise. - - * src/vcg.c (output_edge): Don't quote linestyle arg. - Problem reported by twlevo@xs4all.nl. - -2005-02-28 Paul Eggert <eggert@cs.ucla.edu> - - * doc/bison.texinfo (Semantic Tokens): Fix scoping problem in - example, reported by Derek M Jones. Also, make the example even - more outrageous, to better illustrate how bad the problem is. - -2005-02-24 Paul Eggert <eggert@cs.ucla.edu> - - * doc/bison.texinfo (Mfcalc Symtab): Correct the prototype for - putsym. Typo reported by Sebastian Piping. - -2005-02-23 Paul Eggert <eggert@cs.ucla.edu> - - * doc/bison.texinfo (Language and Grammar): some -> same - (Epilogue): int he -> in the - Typos reported by Sebastian Piping via Justin Pence. - -2005-02-07 Paul Eggert <eggert@cs.ucla.edu> - - * tests/glr-regression.at (Improper handling of embedded actions - and dollar(-N) in GLR parsers): Renamed from "Improper handling of - embedded actions and $-N in GLR parsers", work around an Autoconf bug - with dollar signs in test names. - * tests/input.at (Invalid dollar-n): Renamed from "Invalid \$n", - for a similar reason. - -2005-01-28 Paul Eggert <eggert@cs.ucla.edu> - - * src/vcg.c (output_graph): G_VIEW -> normal_view in case someone - wants to redefine G_VIEW. - -2005-01-27 Paul Eggert <eggert@cs.ucla.edu> - - * src/vcg.c (get_view_str): Remove case for normal_view. - Problem reported by twlevo@xs4all.nl. - -2005-01-24 Paul Eggert <eggert@cs.ucla.edu> - - * configure.ac (O0CFLAGS, O0CXXFLAGS): Fix quoting bug. - Problem reported by twlevo@xs4all.nl. - - * doc/bison.texinfo: Change @dircategory from "GNU programming - tools" to "Software development". Requested by Richard Stallman - via Karl Berry. - -2005-01-23 Paul Eggert <eggert@cs.ucla.edu> - - * tests/c++.at (AT_CHECK_DOXYGEN): Don't use options after operands. - Problem reported by twlevo@xs4all.nl. - -2005-01-21 Paul Eggert <eggert@cs.ucla.edu> - - * data/yacc.c (YYCOPY, yystpcpy, yyparse): Remove "register" - keyword; it's not needed with modern compilers, and it doesn't - affect correctness with older compilers. Suggested by - twlevo@xs4all.nl. - -2005-01-17 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (yyuserAction): Add "default: break;" case to pacify - gcc -Wswitch-default. - * data/lalr1.cc (yy::]b4_parser_class_name[::parse): Likewise. - * data/yacc.c (yyparse): Likewise. - -2005-01-12 Paul Eggert <eggert@cs.ucla.edu> - - * src/system.h (OUTPUT_EXT, TAB_EXT): Define only if not defined - already. Let config.h define any nonstandard values. - -2005-01-10 Paul Eggert <eggert@cs.ucla.edu> - - * tests/calc.at (_AT_DATA_CALC_Y): Use alarm (100), not alarm (10), - for the benefit of slower hosts. Problem reported by - Nelson H. F. Beebe. - -2005-01-07 Paul Eggert <eggert@cs.ucla.edu> - - * data/yacc.c (yyparse): Pacify non-GCC compilers about yyerrorlab - being defined and not used. - * data/lalr1.cc (yyparse): Likewise. - Use "if (false)" rather than "if (0)". - -2005-01-05 Paul Eggert <eggert@cs.ucla.edu> - - * TODO: Mention that we should allow NUL bytes in tokens. - -2005-01-02 Paul Eggert <eggert@cs.ucla.edu> - - * src/scan-skel.l (<<EOF>>): Don't close standard output. - Problem reported by Hans Aberg. - -2005-01-01 Paul Eggert <eggert@cs.ucla.edu> - - * src/getargs.c (version): Happy new year; update overall - program copyright date from 2004 to 2005. - - * src/scan-skel.l ("@output ".*\n): Don't close standard output. - Problem reported by Hans Aberg. - * tests/output.at (AT_CHECK_OUTPUT): New arg SHELLIO. - (Output file names.): Add a test for the case when standard output - is closed. - -2004-12-26 Paul Eggert <eggert@cs.ucla.edu> - - * doc/bison.texinfo (@copying): Update FDL version number to 1.2, - to fix an oversight in the Bison 2.0 manual. - -2004-12-25 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Version 2.0. Reformat the existing news items since - 1.875, so that related items are grouped together. - * configure.ac (AC_INIT): Bump version to 2.0. - * src/parse-gram.c, src/parse-gram.h: Regenerate with 2.0. - - * tests/torture.at (Exploding the Stack Size with Alloca): Set - YYSTACK_USE_ALLOCA to 1 if __GNUC__ or alloca are defined; - otherwise, we're not testing alloca. Unfortunately there's no - simple way to consult HAVE_ALLOCA here. - - * data/lalr1.cc (yydestruct_): Pacify unused variable warning - for yymsg, too. - - * src/LR0.c (new_itemsets): Use memset rather than zeroing by - hand. This avoids a warning about comparing int to size_t when - GCC warnings are enabled. - -2004-12-22 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Bison-generated parsers no longer default to using the - alloca function (when available) to extend the parser stack, due - to widespread problems in unchecked stack-overflow detection. - * data/glr.c (YYMAXDEPTH): Remove undef when zero. It's the user's - responsibility to set it to a positive value. This lets the user - specify a value that is not a preprocessor constant. - * data/yacc.c (YYMAXDEPTH): Likewise. - (YYSTACK_ALLOC): Define only if YYSTACK_USE_ALLOCA is nonzero. - * doc/bison.texinfo (Stack Overflow): YYMAXDEPTH no longer needs - to be a compile-time constant. However, explain the constraints on it. - Also, explain the constraints on YYINITDEPTH. - (Table of Symbols): Explain that alloca is no longer the default. - Explain the user's responsibility if they define YYSTACK_USE_ALLOCA - to 1. - - * doc/bison.texinfo (Location Default Action): Mention that n must - be zero when k is zero. Suggested by Frank Heckenbach. - -2004-12-22 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (parser::token_number_type, parser::rhs_number_type) - (parser::state_type, parser::semantic_type, parser::location_type): - Private, not public. - (parser::parse): Return ints, not bool. - Returning a bool introduces a problem: 0 corresponds to false, and - it seems weird to return false on success. Returning true changes - the conventions for yyparse. - Alternatively we could return void and send an exception. - There is no clear consensus (yet?). - (state_stack, semantic_stack, location_stack): Rename as... - (state_stack_type, semantic_stack_type, location_stack_type): these. - Private, not public. - * tests/c++.at: New. - * tests/testsuite.at, tests/Makefile.am: Adjust. - -2004-12-21 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (parser::parse): Return a bool instead of an int. - -2004-12-21 Akim Demaille <akim@epita.fr> - - Don't impose std::string for filenames. - - * data/lalr1.cc (b4_filename_type): New. - (position::filename): Use it. - (parser.hh): Move the inclusion of stack.hh and location.hh below - the user code, so that needed headers for the filename type can be - included first. - Forward declare them before the user code. - * tests/Makefile.am (check-local, installcheck-local): Pass - TESTSUITEFLAGS to the TESTSUITE. - -2004-12-20 Akim Demaille <akim@epita.fr> - - Use more STL like names: my_class instead of MyClass. - - * data/lalr1.cc (LocationStack, LocationType, RhsNumberType) - (SemanticStack, SemanticType, StateStack, StateType) - (TokenNumberType, Stack, Slice, Traits, Parser::location) - (Parser::value): Rename as... - (location_stack, location_type, rhs_number_type, semantic_stack) - (semantic_type, state_stack, state_type, token_number_type, stack) - (slice, traits, parser::yylloc, parser::yylval): these. - - * tests/calc.at, tests/regression.at, tests/actions.at: Adjust. - -2004-12-19 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (YYLLOC_DEFAULT): Use GNU spacing conventions. - * data/yacc.c (YYLLOC_DEFAULT): Likewise. - -2004-12-17 Paul Eggert <eggert@cs.ucla.edu> - - Remove uses of 'short int' and 'unsigned short int'. This raises - some arbitrary limits. It uses more memory but nowadays that's - not much of an issue. - - This change does not affect the generated parsers; that's a different - task, as some users will want to conserve memory there. - - Ideally we should use size_t to represent all object counts, and - something like ptrdiff_t to represent signed differences of object - counts; but that will require more code-cleanup than I have the - time to do right now. - - * src/LR0.c (allocate_itemsets, new_itemsets, save_reductions): - Use size_t, not int or short int, to count objects. - * src/closure.c (nritemset, closure): Likewise. - * src/closure.h (nritemset, closure): Likewise. - * src/nullable.c (nullable_compute): Likewise. - * src/print.c (print_core): Likewise. - * src/print_graph.c (print_core): Likewise. - * src/state.c (state_compare, state_hash): Likewise. - * src/state.h (struct state): Likewise. - * src/tables.c (default_goto, goto_actions): Likewise. - - * src/gram.h (rule_number, rule): Use int, not short int. - * src/output.c (prepare_rules): Likewise. - * src/state.h (state_number, STATE_NUMBER_MAXIMUM, transitions, - errs, reductions): Likewise. - * src/symtab.h (symbol_number, SYMBOL_NUMBER_MAXIMUM, struct symbol): - Likewise. - * src/tables.c (vector_number, tally, action_number, - ACTION_NUMBER_MINIMUM): Likewise. - * src/output.c (muscle_insert_short_int_table): Remove. - -2004-12-17 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc: Extensive Doxygenation. - (error_): Rename as... - (error): this, since it is visible to the user. - Adjust callers. - (Parser::message): Now an automatic variable from... - (Parser::yyreport_syntax_error_): here. - * tests/actions.at, tests/calc.at, tests/regression.at: Adjust to - Parser::error. - * tests/input.at: Escape $. - -2004-12-16 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (b4_lhs_value, b4_rhs_value, b4_rhs-location): - Parenthesize rhs to avoid obscure problems with mistakes like - "foo$$bar = foo$1bar;". Problem reported by twlevo at xs4all. - * data/lalr1.cc (b4_lhs_value, b4_rhs_value, b4_lhs_location, - b4_rhs_location): Likewise. - * data/yacc.c (b4_lhs_value, b4_rhs_value, b4_lhs_location, - b4_rhs_location): Likewise. - -2004-12-16 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (yyreport_syntax_error_): Catch up with glr.c and - yacc.c: be sure to stay within yycheck_. - * tests/actions.at: Re-enable C++ tests. - -2004-12-16 Akim Demaille <akim@epita.fr> - - * src/print_graph.c (print_graph): Remove layoutalgorithm uses for - real. - -2004-12-16 Akim Demaille <akim@epita.fr> - - Use #define to handle the %name-prefix. - - * data/glr.c, data/yacc.c: Comment changes. - * data/lalr1.cc (yylex): Use #define to select the name of yylex, - so that one can refer to yylex in the parser file, and have it - renamed, as is the case with other skeletons. - -2004-12-16 Akim Demaille <akim@epita.fr> - - Move lalr1.cc internals into yy*. - - * data/lalr1.cc (semantic_stack_, location_stack_, state_stack_) - (semantic_stack_, location_stack_, pact_, pact_ninf_, defact_) - (pgoto_, defgoto_, table_, table_ninf_, check_, stos_, r1_, r2_) - (name_, rhs_, prhs_, rline_, token_number_, eof_, last_, nnts_) - (empty_, final_, terror_, errcode_, ntokens_) - (user_token_number_max_, undef_token_, n_, len_, state_, nerrs_) - (looka_, ilooka_, error_range_, nerrs_): - Rename as... - (yysemantic_stack_, yylocation_stack_, yystate_stack_) - (yysemantic_stack_, yylocation_stack_, yypact_, yypact_ninf_) - (yydefact_, yypgoto_, yydefgoto_, yytable_, yytable_ninf_) - (yycheck_, yystos_, yyr1_, yyr2_, yyname_, yyrhs_, yyprhs_) - (yyrline_, yytoken_number_, yyeof_, yylast_, yynnts_, yyempty_) - (yyfinal_, yyterror_, yyerrcode_, yyntokens_) - (yyuser_token_number_max_, yyundef_token_, yyn_, yylen_, yystate_) - (yynerrs_, yylooka_, yyilooka_, yyerror_range_, yynerrs_): - these. - -2004-12-15 Paul Eggert <eggert@cs.ucla.edu> - - Fix some problems reported by twlevo at xs4all. - * src/symtab.c (symbol_new): Report an error if the input grammar - contains too many symbols. This is better than calling abort() later. - * src/vcg.h (enum layoutalgorithm): Remove. All uses removed. - (struct node, struct graph): - Rename member expand to stretch. All uses changed. - (struct graph): Remove member layoutalgorithm. All uses removed. - * src/vcg.c (get_layoutalgorithm_str): Remove. All uses removed. - * src/vcg_defaults.h (G_STRETCH): Renamed from G_EXPAND. - All uses changed. - (N_STRETCH): Rename from N_EXPAND. All uses changed. - -2004-12-15 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc: Normalize /** \brief ... */ to ///. - Add more Doxygen comments. - (symprint_, stack_print_, reduce_print_, destruct_, pop) - (report_syntax_error_, translate_): Rename as... - (yysymprint_, yystack_print_, yyreduce_print_, yydestruct_) - (yypop_, yyreport_syntax_error_, yytranslate_): this. - -2004-12-15 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (lex_): Rename as... - (yylex_): this. - Move the trace here. - Take the %name-prefix into account. - Reported by Alexandre Duret-Lutz. - -2004-12-15 Akim Demaille <akim@epita.fr> - - Simplify the C++ parser constructor. - - * data/lalr1.cc (debug_): Rename as... - (yydebug_): so that the parser's internals are always in the yy* - pseudo namespace. - Adjust uses. - (b4_parse_param_decl): Remove the leading comma as it is now only - called as unique argument list. - (Parser::Parser): Remove the constructor accepting a location and - an initial debugging level. - Remove from the other ctor the argument for the debugging level. - (debug_level_type, debug_level, set_debug_level): New. - - * tests/actions.at, tests/calc.at, tests/regression.at: Adjust - constructor calls. - -2004-12-15 Akim Demaille <akim@epita.fr> - - Remove b4_root related material: failure experiment - (which goal was to allow to derive from a class). - - * data/lalr1.cc (b4_root, b4_param, b4_constructor): Remove - definitions and uses. - -2004-12-14 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (struct yyGLRStack): yyerror_range now has 3 items, - not 2, since it's not portable to subtract 1 from the start of an - array. The new item 0 is never set or used. All uses changed. - - (yyrecoverSyntaxError): Use YYLLOC_DEFAULT instead of assuming - the default definition of YYLLOC_DEFAULT. Problem reported - by Frank Heckenbach. - -2004-12-12 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (YYRHSLOC): Don't have two definitions, one for - the normal case and one for the error case. Just use the - first one uniformly. Problem reported by Frank Heckenbach. - (YYLLOC_DEFAULT): Use the conventions of yacc.c, so we can - use exactly the same macro in both places. - (yyerror_range): Now of type yyGLRStackItem, not YYLTYPE, - so that the normal-case YYRHSLOC works for the error case too. - All uses changed. - * data/yacc.c (YYRHSLOC): New macro, taken from glr.c. - (YYLLOC_DEFAULT): Use the same macro as glr.c. - * doc/bison.texinfo (Location Default Action): Don't claim that - we have an array of locations. Use the same macro for both glr - and lalr parsers. Mention YYRHSLOC. Mention what happens when - the index is 0. - -2004-12-10 Paul Eggert <eggert@cs.ucla.edu> - - * HACKING: Update email addresses to send announcements to. - - * configure.ac (AC_INIT): Bump version to 1.875f. - -2004-12-10 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Version 1.875e. - * src/parse-gram.c, src/parse-gram.h: Regenerate with 1.875e. - - * src/scan-skel.l: Include "complain.h", for "fatal". - - * src/relation.h (relation_print, relation_digraph): - Relation sizes are of type relation_node, not size_t (this is - merely a doc fix, since the two types are equivalent). - (relation_transpose): Relation sizes are of type relation_node, - not int. - * src/relation.c: Likewise. - (top, infinity): Now of type relation_node, not int. - (traverse, relation_transpose): Use relation_node, not int. - - * data/glr.c (yyuserAction, yyrecoverSyntaxError): Mark args - with ATTRIBUTE_UNUSED if they're not used, to avoid GCC warning. - (yyparse): Remove unused local introduced in 2004-10-25 patch. - - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): New arg - specifying whether the test should be skipped. Use it tp - specify that the [%defines %skeleton "lalr1.cc"] tests currently - fail on some hosts, and should be skipped. - -2004-12-08 Paul Eggert <eggert@cs.ucla.edu> - - * src/system.h (CALLOC, MALLOC, REALLOC): Remove. All callers - changed to use xcalloc, xnmalloc, xnrealloc, respectively, - unless otherwise specified below. - - * src/LR0.c (allocate_itemsets): Use xnmalloc, not xcalloc, - to allocate kernel_base, kernel_items, kernel_size, since - they needn't be initialized to 0. - (allocate_storgae): Likewise, for shiftset, redset, shift_symbol. - * src/closure.c (new_closure): Likewise, for itemset. - * src/derives.c (derives_compute): Likewise, for delts, derives, q. - * src/lalr.c (set_goto_map): Likewise, for temp_map. - (initialize_F): Likewise, for reads, edge, reads[i], includes[i]. - (build_relations): Likewise for edge, states1, includes. - * src/nullable.c (nullable_compute): Likewise, for squeue, relts. - * src/reader.c (packgram): Likewise, for ritem, rules. - * src/reduce.c (nonterminals_reduce): Likewise for nontermmap. - * src/relation.c (relation_digraph): Likewise for VERTICES. - (relation_transpose): Likewise for new_R, end_R. - * src/symtab.c (symbols_token_translations_init): Likewise for - token_translations. - * src/tables.c (save_row): Likewise for froms, tos, conflict_tos. - (token_actions): Likewise for yydefact, actrow, conflrow, - conflict_list. - (save_column): Likewise for froms[symno], tos[symno]. - (goto_actions): Likewise for state_count. - (pack_table): Likewise for base, pos, check. - (tables_generate): Likewise for width. - - * src/LR0.c (set_states): Don't reuse kernel_size and kernel_base - for initial core. Just have a separate core, so we needn't worry - about whether kernel_size and kernel_base are initialized. - - * src/LR0.c (shift_symbol, redset, shiftset, kernel_base, - kernel_size, kernel_items): Remove unnecessary initialization. - * src/conflicts.c (conflicts): Likewise. - * src/derives.c (derives): Likewise. - * src/muscle_tablc (muscle_insert): Likewise. - * src/relation.c (relation_digraph): Likewise. - * src/tables.c (froms, tos, conflict_tos, tally, width, actrow, order, - conflrow, conflict_table, conflict_list, table, check): - Likewise. - - * src/closure.c (new_closure): Arg is of type unsigned int, not int. - This is because all callers pass unsigned int. - * src/closure.h (new_closure): Likewise. - - * src/lalr.c (initialize_F): Initialize reads[i] in all cases. - (build_relations): Initialize includes[i] in all cases. - * src/reader.c (packgram): Always initialize rules[ruleno].prec - and rules[ruleno].precsym. Initialize members in order. - * src/relation.c (relation_transpose): Always initialize new_R[i] - and end_R[i]. - * src/table.c (conflict_row): Initialize 0 at end of conflict_list. - - * src/output.c (prepare_actions): Pass 0 instead of conflict_list[0]; - conflict_list[0] was always 0, but now it isn't initialized. - - * src/table.c (table_grow): When conflict_table grew, the grown - area wasn't cleared. Fix this. - - * lib/.cvsignore: Add strdup.c, strdup.h. - * m4/.cvsignore: Add strdup.m4. - -2004-12-07 Paul Eggert <eggert@cs.ucla.edu> - - * src/lalr.h (GOTO_NUMBER_MAXIMUM): New macro. - * src/lalr.c (set_goto_map): Don't allow ngotos to equal - GOTO_NUMBER_MAXIMUM, since we occasionally compute - ngotos + 1 without checking for overflow. - (build_relations): Use END_NODE, not -1, to denote end of edges. - * src/lalr.c (set_goto_map, map_goto, initialize_F, add_loopback_edge, - build_relations): Use goto_number, not int, for goto numbers. - * src/tables.c (save_column, default_goto): Likewise. - -2004-11-23 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (YYSTYPE): Define it as is done for C, instead - of #defining from yystype. - Don't typedef yystype, C++ does not need it. - This lets it possible to forward declare it as union. - -2004-11-23 Paul Eggert <eggert@cs.ucla.edu> - - * bootstrap (gnulib_modules): Add extensions. - Problem reported by Jim Meyering. - -2004-11-22 Paul Eggert <eggert@cs.ucla.edu> - - * src/LR0.c, src/closure.c, src/derives.c, src/gram.c, - src/lalr.c, src/nullable.c, src/relation.c, src/scan-skel.l, - src/system.h, src/tables.c: XFREE -> free, to accommodate - recent change to gnulib xalloc.h. - Problem reported by Jim Meyering. - -2004-11-17 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (symprint_): Use cdebug_ to avoid warnings. - -2004-11-17 Akim Demaille <akim@epita.fr>, - Alexandre Duret-Lutz <adl@gnu.org> - - * data/lalr1.cc (Parser::yycdebug_): New, a pointer, to allow - changes. - (YYCDEBUG): Adjust. - Use it instead of cdebug_. - (Parser::debug_stream, Parser::set_debug_stream): New. - (Parser::symprint_): Define cdebug_ for temporary backward - compatibility. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Use - debug_stream (). - -2004-11-17 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (Parser:print_): Remove, use %printer instead. - * tests/regression.at (_AT_DATA_DANCER_Y): Adjust. - * tests/calc.at (_AT_DATA_CALC_Y): Ditto. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Likewise. - -2004-10-27 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (yyloc_default): Remove; not used. - Problem reported by Frank Heckenbach. - -2004-10-25 Akim Demaille <akim@epita.fr> - - * data/glr.c (YYRHSLOC): Move its definition next to its uses. - Introduce another definition to address simple location arrays. - (yyGLRStack): New member: yyerror_range. - (yyrecoverSyntaxError, yyparse): Update it. - (yyrecoverSyntaxError): Use it when shifting the error token to - have an accurate range, equivalent to the one computed by both - yacc.c and lalr1.cc. - * tests/cxx-type.at (_AT_TEST_GLR_CXXTYPES): Change its yylex so - that column numbers start at column 0, as per GNU Coding - Standards, the others tests, and the doc. - (_AT_RESOLVED_GLR_OUTPUT_WITH_LOC, _AT_AMBIG_GLR_OUTPUT_WITH_LOC): - Adjust to the above change (first column is 0). - And adjust the location of the "<error>", now covering the whole - line. - -2004-10-22 Akim Demaille <akim@epita.fr> - and Paul Eggert <eggert@cs.ucla.edu> - - Remove some arbitrary limits on goto numbers and relations. - * src/lalr.c (goto_map, ngotos, from_state, to_state): Omit - initial values, since they're never used. - (set_goto_map): ngotos is now unsigned, so test for overflow - by seeing whether it wraps around to zero. - * src/lalr.h (goto_number): Now size_t, not short int. - (GOTO_NUMBER_MAXIMUM): Remove. - * src/relation.c (relation_print, traverse, relation_transpose): - Check for END_NODE rather than looking at sign. - * src/relation.h (END_NODE): New macro. - (relation_node): Now size_t, not short int. - -2004-10-22 Paul Eggert <eggert@cs.ucla.edu> - - * doc/bison.texinfo (Language and Grammar): In example, "int" is a - keyword, not an identifier. Problem reported by Baron Schwartz in - <http://lists.gnu.org/archive/html/bug-bison/2004-10/msg00017.html>. - -2004-10-11 Akim Demaille <akim@epita.fr> - - * src/symtab.c (symbol_check_alias_consistency): Also check - type names, destructors, and printers. - Reported by Alexandre Duret-Lutz. - Recode the handling of associativity and precedence in terms - of symbol_precedence_set. - Accept no redeclaration at all, not even equal to the previous - value. - (redeclaration): New. - Use it to factor redeclaration complaints. - (symbol_make_alias): Don't set the type of the alias, let - symbol_check_alias_consistency do it as for other features. - * src/symtab.h (symbol): Add new member prec_location, and - type_location. - * src/symtab.c (symbol_precedence_set, symbol_type_set): Set them. - * tests/input.at (Incompatible Aliases): New. - -2004-10-09 Paul Eggert <eggert@cs.ucla.edu> - - .cvsignore fixes to accommodate gnulib changes, - and the practice of naming build directories "_build". - * .cvsignore: Add "_*". Sort. - * lib/.cvsignore: Add getopt_.h, xalloc-die.c. - * m4/.cvsignore: Add "*_gl.m4". - -2004-10-06 Akim Demaille <akim@epita.fr> - - * src/parse-gram.y (add_param): Fix the truncation of trailing - spaces. - -2004-10-05 Akim Demaille <akim@epita.fr> - - In Bison 1.875's yacc.c, YYLLOC_DEFAULT was called regardless - whether the reducion was empty or not. This leaves room to - improve the use of YYLLOC_DEFAULT in such a case. - lalr1.cc is still experimental, so changing this is acceptable. - And finally, there are probably not many users who changed the - handling of locations in GLR, so changing is admissible too. - - * data/glr.c, data/lalr1.cc, data/yacc.c (YYLLOC_DEFAULT): On an - empty reduction, set @$ to an empty location ending the previously - stacked symbol. - Adjust uses to make sure the code is triggered on empty - reductions. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Adjust the - expected output: empty reductions have empty locations. - -2004-09-29 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc: Move towards a more standard C++ coding style - for templates: Class < T > -> Class<T>. - -2004-09-29 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc: Reinstall the former ctor, for sake of - compatibility, but warn it will be removed. - Move towards a more standard C++ coding style (i.e., type *var -> - type* var). - -2004-09-27 Paul Eggert <eggert@cs.ucla.edu> - - * src/parse-gram.y (add_param): Rewrite to avoid strchr, - since it's less likely to work if NULs are involved in the future. - -2004-09-27 Akim Demaille <akim@epita.fr> - - * data/yacc.c (YY_LOCATION_PRINT): Fix its default declaration. - -2004-09-27 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (b4_parse_param_decl_1): New. - (b4_parse_param_decl): Use it to have different names between attribute - and argument names. - (b4_cc_constructor_call): Likewise. - -2004-09-24 Akim Demaille <akim@epita.fr> - - * src/parse-gram.y (add_param): Strip the leading and trailing - blanks from a formal argument declaration. - (YY_LOCATION_PRINT): New. - -2004-09-24 Akim Demaille <akim@epita.fr> - - * data/c.m4 (b4_yysymprint_generate): Move the YYINPUT invocation - after the location. - -2004-09-24 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Table of Symbols): Sort. - -2004-09-21 Akim Demaille <akim@epita.fr> - - * data/yacc.c, data/glr.c (b4_at_dollar, b4_dollar_dollar): Remove - the useless parentheses. - Suggested by Paul Eggert. - -2004-09-20 Akim Demaille <akim@epita.fr> - - Let the initial-action act on the look-ahead, and use it for the - "initial push" (corresponding to an hypothetical beginning-of-file). - And let lalr1.cc honor %initial-action. - - * doc/bison.texinfo (Initial Action Decl): Clarify, and add an - example. - * data/lalr1.cc (Parser::initlocation_): Remove, bad experiment. - (Parser::Parser): Remove the ctor that used to initialize it. - (Parser::parse): Like in the other skeletons, issue the "starting - parse" message before any action. - Honor %initial-action. - Initialize the stacks with the lookahead. - * data/yacc.c: Let $$ and @$ in %initial-action designate the - look-ahead. - Push them in the stacks. - * tests/actions.at, tests/calc.at: Adjust the C++ ctor invocations. - -2004-09-20 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Initial Action Decl): New. - -2004-09-20 Akim Demaille <akim@epita.fr> - - * data/yacc.c (YY_LOCATION_PRINT): Use YYLTYPE_IS_TRIVIAL as a - clearer criterion to define it. - (parse): Initialize the initial location when YYLTYPE_IS_TRIVIAL. - When reducing on an empty RHS, use the latest stacked location as - location. - yylloc is not always available. - * data/glr.c: Likewise. - Also, honor initial-actions. - -2004-09-20 Akim Demaille <akim@epita.fr> - - * data/yacc.c (YY_LOCATION_PRINT): New. - Define when we know YYLTYPE's structure, i.e., when the default - YYLLOC_DEFAULT is used. - * data/c.m4 (b4_yysymprint_generate): Use it. - * data/lalr1.cc (YYLLOC_DEFAULT): Stop relying on the initial - value of the result. - (error_start_): Replace with... - (error_range_): this location array. - This allows to replace code relying on the implementation of - locations by portable code. - * data/yacc.c (yylerrsp): Replace with... - (yyerror_range): this. - Every time a token is popped, update yyerror_range[0], to have an - accurate location for the error token. - * data/glr.c (YY_LOCATION_PRINT): New. - (yyprocessOneStack): Fix an invocation of YY_SYMBOL_PRINT: - deference a pointer. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): No longer - report the location in %printers. - - * src/scan-skel.l: Instead of abort, report error messages to ease - understanding skeleton scanning failures. - -2004-09-16 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (Stack::Iterator, Stack::ConstIterator): Rename as... - (iterator, const_iterator): these, to be more in the C++ spirit. - Also, return reverse iterators so that when displaying the stack - we display its bottom first. - (Parser::stack_print_, Parser::reduce_print_): Match the messages - from yacc.c. - We should probably use vector here though. - -2004-09-16 Akim Demaille <akim@epita.fr> - - Have more complete shift traces. - - * data/yacc.c, data/lalr1.c, data/glr.c: Use YY_SYMBOL_PRINT - to report Shifts instead of ad hoc YYDPRINTF invocations, - including for the error token. - * data/lalr1.cc (symprint_): Output the location. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): In C++, don't - output the location within the %printer. - Activate GLR tests, at least to make sure they compile properly. - They still don't pass though. - * tests/calc.at: Adjust expect verbose output, since now "Entering - state..." is on a different line than the "Shifting" message. - -2004-09-08 Akim Demaille <akim@epita.fr> - - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Move the - Bison directive from the Bison file to the invocation of this - macro, so that these directives are passed to - AT_BISON_OPTION_PUSHDEFS to get correct help macros. - Use these helping macros (e.g., AT_LOC, AT_VAL and so forth). - Move the AT_SETUP/AT_CLEANUP outside, to report as test title - the extra Bison directives instead of the whole series. - Change the grammar so that there are recoverable errors, and - unrecoverable errors. Now we can have the parser give up before - consuming the whole input. As a result we now can observe that - the lookahead is freed when needed. - Change the parser source to parse argv[1] instead of a hard coded - string. - Simplify yylex, and give a value and location to EOF. - Simplify some invocations of AT_CHECK_PRINTER_AND_DESTRUCTOR that - passed directives already coded in the file. - Add some tests to check the location of "error". - For some tests, the C++ parser is correct, and not yacc.c. - For other tests, they provide different, but unsatisfying, values, - so keep the C++ value so that at least one parser is "correct" - according to the test suite. - (Actions after errors): Remove, this is subsumed by the - AT_CHECK_PRINTER_AND_DESTRUCTOR series. - -2004-09-06 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc: Adjust the indentation of the labels. - (Parser::pop): New. - Use it. - -2004-09-06 Akim Demaille <akim@epita.fr> - - * data/yacc.cc, data/glr.cc (yydestruct): Accept an additional - argument, an informative message. - Call YY_SYMBOL_PRINT. - Adjust all callers: integrate the associated YY_SYMBOL_PRINT. - * data/lalr1.cc (destruct_): Likewise. - In addition, no longer depend on b4_yysymprint_generate and - b4_yydestruct_generate to generate these functions, do it "by - hand". - -2004-09-03 Akim Demaille <akim@epita.fr> - - * data/glr.c, data/lalr1.cc, data/yacc.c: When YYABORT was - invoked, yydestruct the lookahead. - * tests/calc.at (Calculator $1): Update the expected lengths of - traces: there is an added line for the discarded lookahead. - * doc/bison.texinfo (Destructor Decl): Some rewording. - Define "discarded" symbols. - -2004-09-02 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (translate_, destruct_): No reason to be static. - -2004-09-02 Akim Demaille <akim@epita.fr> - - * data/glr.c, yacc.c (YYDSYMPRINT): Remove, not used. - (YYDSYMPRINTF): Rename as... - (YY_SYMBOL_PRINT): this. - * data/lalr1.cc (YY_SYMBOL_PRINT): New, modeled after the previous - two. - Use it instead of direct symprint_ calls. - (yybackup): Tweak the "Now at end of input" case to match yacc.c's - one. - -2004-09-02 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (b4_yysymprint_generate): New. - (symprint_): New member function, defined when YYDEBUG. - Use it consistently instead of token/nterm debugging output by - hand. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Adjust - %printer calls to use cdebug_ when using lalr1.cc. - -2004-08-30 Florian Krohm <florian@edamail.fishkill.ibm.com> - - * data/glr.c: Guard the declarations of yypstack and yypdumpstack - with #ifdef YYDEBUG. - -2004-08-26 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Implementing Loops): Rename as... - (Implementing Gotos/Loops): this. - -2004-08-13 Paul Eggert <eggert@cs.ucla.edu> - - Adjust to latest gnulib. - * bootstrap (gnulib_modules): Add xalloc-die. - Set LC_ALL=C so that file names sort consistently. - Prefer the gnulib copies of gettext.m4, glibc21.m4, - inttypes_h.m4, lib-ld.m4, lib-prefix.m4, po.m4, stdint_h.m4, - uintmax_t.m4, ulonglong.m4. - (intl_files_to_remove): Add gettext.m4, lib-ld.m4, lib-prefix.m4, - po.m4 since we are now using _gl.m4 instead. - -2004-08-10 Florian Krohm <florian@edamail.fishkill.ibm.com> - - * src/scan-action.l: Remove. Scanning of semantic actions is - handled in scan-gram.l. - -2004-08-07 Florian Krohm <florian@edamail.fishkill.ibm.com> - - * src/scan-gram.l (handle_syncline): Use uniqstr_new not xstrdup. - - * src/location.h (struct): The file member is a uniqstr. - (equal_boundaries): Use UNIQSTR_EQ for comparison. - -2004-07-22 Paul Eggert <eggert@cs.ucla.edu> - - Fix bug with non-%union parsers that have printers or destructors, - which led to a Bison core dump. Reported by Peter Fales in - <http://lists.gnu.org/archive/html/bug-bison/2004-07/msg00014.html>. - - * data/c.m4 (b4_symbol_actions): Don't assume %union was used. - * data/lalr1.cc (yystype) [defined YYSTYPE]: Define to YYSTYPE, - not to our own type. - * src/output.c (symbol_destructors_output, symbol_printers_output): - Don't assume %union. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR, - AT_CHECK_PRINTER_AND_DESTRUCTOR): New argument - UNION-FLAG. All callers changed. - (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Don't assume %union. - Use type char, not unsigned int, when declaring an array of char; - this lets us remove a cast. - (Printers and Destructors): Add non-%union test cases. - -2004-06-21 Paul Eggert <eggert@cs.ucla.edu> - - * doc/bison.texinfo: Minor editorial changes, mostly to the new - GLR writeups. E.g., avoid frenchspacing and the future tense, - change "lookahead" to "look-ahead", and change "wrt" to "with - respect to". - -2004-06-21 Paul Hilfinger <hilfingr@CS.Berkeley.EDU> - - * doc/bison.texinfo (Merging GLR Parses, Compiler Requirements): - New sections, split off from the GLR Parsers section. Put the new - Simple GLR Parser near the start of the GLR section, for clarity. - Rewrite connective text. - -2004-06-21 Frank Heckenbach <frank@g-n-u.de> - - * doc/bison.texinfo (Simple GLR Parsers): New section. - -2004-06-21 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS, TODO, doc/bison.texinfo: - Use "look-ahead" instead of "lookahead", to be consistent. - * REFERENCES: Fix incorrect reference to DeRemer and Pennello, - while we're fixing "look-ahead". - * src/conflicts.c (shift_set): Renamed from shiftset. - (look_ahead_set): Renamed from lookaheadset. - * src/print.c: Likewise. - * src/getargs.c (report_args): Add "look-ahead" as the new canonical - name for "lookahead". - (report_types, usage): Likewise. - * src/getargs.h (report_look_ahead_tokens): Renamed from - report_lookaheads. - * src/lalr.c (compute_look_ahead_tokens): Renamed from - compute_lookaheads. - (state_look_ahead_tokens_count): Renamed from state_lookaheads_count. - (look_ahead_tokens_print): Renamed from lookaheads_print. - * src/state.c (state_rule_look_ahead_tokens_print): Renamed from - state_rule_lookaheads_print. - * src/state.h: Likewise. - (reductions.look_ahead_tokens): Renamed from lookaheads. - * tests/torture.at (AT_DATA_LOOK_AHEAD_TOKENS_GRAMMAR): Renamed from - AT_DATA_LOOKAHEADS_GRAMMAR. - -2004-06-03 Paul Eggert <eggert@cs.ucla.edu> - - * README: Update location of patched M4 distribution. - -2004-05-30 Albert Chin-A-Young <china@thewrittenword.com> - - Don't assume the C++ compiler takes the same arguments as the C compiler - (trivial change). - * configure.ac (O0CXXFLAGS): New var. - * tests/atlocal.in (CXXFLAGS): Use it. - -2004-05-29 Paul Eggert <eggert@cs.ucla.edu> - - Fix some "make check" problems with C++ reported by - Albert Chin-A-Young for Tru64 C++ in this thread: - http://lists.gnu.org/archive/html/bug-bison/2004-05/msg00049.html - - * m4/cxx.m4 (BISON_TEST_FOR_WORKING_CXX_COMPILER): Check for std::cerr. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): - Output to a .cc file for C++, not to a .c file. - * tests/calc.at (AT_CHECK_CALC): Likewise. - * tests/regression.at (AT_CHECK_DANCER): Likewise. - * tests/local.at (AT_COMPILE_CXX): Default to OUTPUT.cc, not OUTPUT.c. - -2004-05-28 Albert Chin-A-Young <china@thewrittenword.com> - - * tests/calc.at, tests/actions.at: Workaround for SGI - C++ compiler. (trivial change) - -2004-05-27 Paul Eggert <eggert@cs.ucla.edu> - - Spent a few hours checking out which prerequisite versions the - current sources actually require. I went all the way back to - Gettext 0.10.40, Automake 1.4, and Autoconf 2.57 and investigated - a seemingly endless set of combinations of versions more recent - than that. The bottom line is that the current sources require - fairly recent versions of the build tools, and it'll be some work - to change this. - * configure.ac (AC_PREREQ): Increase from 2.58 to 2.59. - (AM_INIT_AUTOMAKE): Increase from 1.7 to 1.8. - (AM_GNU_GETTEXT_VERSION): Increase from 0.11.5 to 0.12. - Add comments explaining why those particular versions are - currently needed. - - * src/parse-gram.y (lloc_default): Rewrite to avoid compiler bug - in SGI MIPSpro 7.4.1m. Problem reported by Albert Chin-A-Young in - <http://lists.gnu.org/archive/html/bug-bison/2004-05/msg00037.html>. - - * configure.ac (AC_PREREQ): Bump to 2.58, since 2.57 doesn't work - (it fails with a Autoconf-without-aclocal-m4 diagnostic). - -2004-05-26 Paul Eggert <eggert@cs.ucla.edu> - - * configure.ac (AM_GNU_GETTEXT_VERSION): Lower it from 0.14.1 to - 0.11.5. Suggested by Bruno Haible. - * bootstrap: Remove gettext version checking. - - * doc/bison.texinfo (Decl Summary): Also mention that %union - can depend on prerequisite types. Problem reported by Tim - Van Holder. - -2004-05-25 Paul Eggert <eggert@cs.ucla.edu> - - * README: Mention GNU m4 1.4 bugs and Akim's patched version. - * README-alpha: Don't tell people not to package this. - - * bootstrap: Don't assume $(...) works; use `...` instead. - Problem reported by Paul Hilfinger. Also, diagnose non-GNU - gettext better. - - * doc/bison.texinfo (Decl Summary, Bison Options): Clarify what's - put into the -d output file, and mention what to do if YYSTYPE is - defined as a macro. - -2004-05-24 Paul Eggert <eggert@cs.ucla.edu> - - Undo change made earlier today: it caused autopoint to not bring - in ABOUT-NLS. Ouch. Instead, substitute our own diagnostic for - autopoint's. - - * bootstrap: Check that gettext version matches what's in - configure.ac. Warn users to ignore robots.txt ERROR 404. - * bootstrap: Undo today's earlier change (logged below). - * configure.ac (AM_GNU_GETTEXT_VERSION): Likewise. - - The gettext version checking is causing more trouble than it's - curing; remove it. Problem reported by Paul Hilfinger. - - * bootstrap: Issue a warning that one can expect a message - 'AM_GNU_GETTEXT is used, but not AM_GNU_GETTEXT_VERSION'. - * configure.ac (AM_GNU_GETTEXT_VERSION): Remove. - -2004-05-23 Paul Eggert <eggert@cs.ucla.edu> - - Ensure that the C++ compiler used for testing actually works on a - simple test program; if not, skip the C++-related tests. Problem - reported by Vin Shelton in: - http://lists.gnu.org/archive/html/bug-bison/2004-05/msg00026.html - - * m4/cxx.m4: New file. - * configure.ac (BISON_TEST_FOR_WORKING_CXX_COMPILER): Add. - * tests/atlocal.in (BISON_CXX_WORKS): Add. - * tests/local.at (AT_COMPILE_CXX): Use it. - -2004-05-21 Paul Eggert <eggert@cs.ucla.edu> - - * data/glr.c (yylloc): Output this macro even if locations are not - being generated, as the GLR parser needs it even in that case. - Problem reported by Troy A. Johnson - <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=195946>. - - * configure.ac (AC_INIT): Update to 1.875e. - -2004-05-21 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Version 1.875d. - * configure.ac (AC_INIT): Likewise. - * src/parse-gram.c, src/parse-gram.h: Regenerate with 1.875d. - - * configure.ac (--enable-gcc-warnings): Do not enable -Wshadow, - -Wmissing-prototypes, or -Wstrict-prototypes for C++. The current - lalr1.cc runs afoul of the first, and the last two are no longer - supported by GCC 3.4.0. - * README: Mention GNU m4 1.4 or later; mention m4 patches. - * HACKING: Use ./bootstrap, not "make update" to import foreign files. - -2004-05-06 Paul Eggert <eggert@cs.ucla.edu> - - * src/muscle_tab.c (hash_muscle): Accept and return size_t, not - unsigned int, for compatibility with latest gnulib hash module. - * src/state.c (state_hash, state_hasher): Likewise. - * src/symtab.c (hash_symbol, hash_symbol_hasher): Likewise. - * src/uniqstr.c (hash_uniqstr): Likewise. - -2004-05-03 Paul Eggert <eggert@cs.ucla.edu> - - * NEWS: Unescaped newlines are no longer allowed in char & strings. - - * src/scan-gram.l (<SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER, - SC_CHARACTER,SC_STRING>): Reject unescaped newlines in - character and string literals. - (unexpected_end): New function. - (unexpected_eof): Use it. - (unexpected_newline): New function. - (<INITIAL,SC_AFTER_IDENTIFIER,SC_PRE_CODE>): Coalesce duplicate - actions. - - * NEWS: Document %expect-rr. - - * bootstrap (--gnulib-srcdir=*, --cvs-user=*): - Fix typo by replacing $1 with $option. - Remove more 'intl'-related files. - Don't DEFUN AM_INTL_SUBDIR twice. - - * lib/.cvsignore: Add strndup.h. Remove memchr.c, memcmp.c, - memrchr.c, strcasecmp.c, strchr.c, strrchr.c, strspn.c, strtol.c, - strtoul.c. - * m4/.cvsignore: Add exitfail.m4, extensions.m4, gnulib.m4, - hard-locale.m4, mbstate_t.m4, strerror_r.m4, strndup.m4, - xstrndup.m4. Remove glibc21.m4, intdiv0.m4, inttypes-pri.m4, - inttypes.m4, inttypes_h.m4, isc-posix.m4, lcmessage.m4, - stdint_h.m4, uintmax_t.m4, ulonglong.m4. - * src/.cvsignore: Add *.output. - - * src/parse-gram.y: Put copyright notice inside %{ %} so it - gets copied to the output file. - -2004-04-28 Paul Eggert <eggert@twinsun.com> - - Get files from the gnulib and po repositories, instead of relying - on them being in our CVS. Upgrade to latest versions of gnulib - and Automake. - - * Makefile.am (SUBDIRS): Remove m4; Automake now does m4. - * bootstrap: Bootstrap from gnulib and po repositories. - Much of this code was stolen from GNU diff and GNU tar's bootstrap. - * README-cvs: Document these changes. Remove version numbers from - mentions of build tools, since they change so often. Mention Flex. - - * configure.ac (AC_CONFIG_MACRO_DIR): Add, with m4 as arg. - (gl_USE_SYSTEM_EXTENSIONS): Add. - (AC_GNU_SOURCE, AC_AIX, AC_MINIX): - Remove; no longer needed, as gl_USE_SYSTEM_EXTENSIONS - does this for us. - (AC_ISC_POSIX): Remove; we no longer support this - ancient OS, as it gets in the way of latest Autoconf & gnulib. - (AC_HEADER_STDC): Remove: we now assume C89 or better. - (AC_CHECK_HEADERS_ONCE): Use instead of AC_CHECK_HEADERS. - Do not check for C89 headers, except for locale.h which is used - by the Yacc library and must port to K&R hosts. - (AC_CHECK_FUNCS_ONCE): Use instead of AC_CHECK_FUNCS. - Do not check for C89 functions, except for setlocale which is - used by the Yacc library. - (AC_CHECK_DECLS, AC_REPLACE_FUNCS): Remove; no longer needed. - (gl_DIRNAME, gl_ERROR, gl_FUNC_ALLOCA, gl_FUNC_MEMCHR, - gl_FUNC_MEMRCHR, gl_FUNC_STPCPY, gl_FUNC_STRNLEN, gl_FUNC_STRTOL, - gl_GETOPT, gl_HASH, gl_MBSWIDTH, gl_OBSTACK, gl_QUOTE, - gl_QUOTEARG, gl_XALLOC, jm_FUNC_GLIBC_UNLOCKED_IO, jm_FUNC_MALLOC, - AM_GNU_GETTEXT): Remove; now done by: - (GNULIB_AUTOCONF_SNIPPET): Add. "bootstrap" builds this for us. - (AC_CONFIG_FILES): Remove m4/Makefile, as Automake now does this - for us. - - * lib/Makefile.am: Include gnulib.mk, built for us by "bootstrap". - (BUILT_SOURCES, EXTRA_DIST, MOSTLYCLEANFILES): - Define to empty, as gnulib.mk will do the rest for us. - ($(libbison_a_OBJECTS), stdbool.h): Remove, as gnulib.mk does this - for us. - (libbison_a_SOURCES): Define to $(lib_SOURCES) now. - (lib_SOURCES): New symbol, containing only the non-gnulib libs. - - * src/files.c: Include gnulib's xstrndup.h. - - * src/system.h (MALLOC): Use xnmalloc, for better overflow checking. - (REALLOC): Use xnrealloc, for likewise. - (xstrndup, stpcpy): Remove decls, as gnulib does this for us now. - (strnlen, memrchr): Remove decls; functions no longer used. - Include <stpcpy.h>. - - * config/depcomp, config/install-sh, lib/alloca.c, lib/argmatch.c, - lib/argmatch.h, lib/basename.c, lib/dirname.c, lib/dirname.h, - lib/error.c, lib/error.h, lib/getopt.c, lib/getopt.h, - lib/getopt1.c, lib/gettext.h, lib/hash.c, lib/hash.h, - lib/malloc.c, lib/mbswidth.c, lib/mbswidth.h, lib/memchr.c, - lib/memcmp.c, lib/memrchr.c, lib/obstack.c, lib/obstack.h, - lib/quote.c, lib/quote.h, lib/quotearg.c, lib/quotearg.h, - lib/realloc.c, lib/stdbool_.h, lib/stpcpy.c, lib/strcasecmp.c, - lib/strchr.c, lib/strncasecmp.c, lib/strnlen.c, lib/strrchr.c, - lib/strspn.c, lib/strtol.c, lib/strtoul.c, lib/unlocked-io.h, - lib/xalloc.h, lib/xmalloc.c, lib/xstrdup.c, lib/xstrndup.c, - m4/Makefile.am, m4/alloca.m4, m4/dirname.m4, m4/dos.m4, - m4/error.m4, m4/getopt.m4, m4/hash.m4, m4/malloc.m4, - m4/mbrtowc.m4, m4/mbswidth.m4, m4/memchr.m4, m4/memcmp.m4, - m4/memrchr.m4, m4/obstack.m4, m4/onceonly.m4, m4/prereq.m4, - m4/quote.m4, m4/quotearg.m4, m4/realloc.m4, m4/stdbool.m4, - m4/stpcpy.m4, m4/strnlen.m4, m4/strtol.m4, m4/strtoul.m4, - m4/unlocked-io.m4, m4/xalloc.m4, po/LINGUAS, po/Makefile.in.in, - po/Makevars, po/da.po, po/de.po, po/es.po, po/et.po, po/fr.po, - po/hr.po, po/id.po, po/it.po, po/ja.po, po/ms.po, po/nl.po, - po/pt_BR.po, po/ro.po, po/ru.po, po/sv.po, po/tr.po: - Remove, as these files are now generated automatically - by bootstrap or automake. - - * po/ChangeLog: Remove: all but one entry was a duplicate - of this file, and I moved that 2000-11-02 entry here. - - * config/.cvsignore: Add Makefile, depcomp, install-sh. - * lib/.cvsignore: Add alloca.c, alloca.h, alloca_.h, argmatch.c, - argmatch.h, basename.c, dirname.c, dirname.h, error.c, error.h, - exit.h, exitfail.c, exitfail.h, getopt.c, getopt.h, getopt1.c, - getopt_int.h, gettext.h, gnulib.mk, hard-locale.c, hard-locale.h, - hash.c, hash.h, malloc.c, mbswidth.c, mbswidth.h, memchr.c, - memcmp.c, memrchr.c, obstack.c, obstack.h, quote.c, quote.h, - quotearg.c, quotearg.h, realloc.c, stdbool_.h, stpcpy.c, stpcpy.h, - strcasecmp.c, strchr.c, stripslash.c, strncasecmp.c, strndup.c, - strnlen.c, strrchr.c, strspn.c, strtol.c, strtoul.c, - unlocked-io.h, xalloc.h, xmalloc.c, xstrdup.c, xstrndup.c, - xstrndup.h. - * m4/.cvsignore: Remove Makefile, Makefile.in. Add alloca.m4, - dirname.m4, dos.m4, error.m4, getopt.m4, hash.m4, mbrtowc.m4, - mbswidth.m4, obstack.m4, onceonly.m4, quote.m4, quotearg.m4, - stdbool.m4, stpcpy.m4, strnlen.m4, unlocked-io.m4, xalloc.m4. - * po/.cvsignore: Add *.po, LINGUAS, Makefile.in.in, Makevars. - * src/.cvsignore: Remove *_.c. - - - * Makefile.maint (GZIP_ENV): Don't use --rsyncable if gzip doesn't - support it. (The latest stable gzip doesn't.) - -2004-04-27 Paul Eggert <eggert@twinsun.com> - - * data/lalr1.cc (Parser::stos_) [! YYDEBUG]: Define even in this - case, as stos_ is now used by destructors due to the 2004-02-09 - change. - - Remove more K&R C support. - * lib/libiberty.y (PARAMS): Remove. All uses removed. - * lib/subpipe.c (errno): Remove decl. - Include <stdlib.h> unconditionally. - (EXIT_FAILURE): Remove macro. - * src/complain.c (vfprintf, strerror): Remove. - * src/system.h: Include limits.h, stdlib.h, string.h, locale.h - unconditionally. - (EXIT_FAILURE, EXIT_SUCCESS, setlocale): Remove defns. - Use latest Autoconf recommendations for including inttypes.h, stdint.h. - (strchr, strspn, memchr): Remove decls. - * tests/calc.at (_AT_DATA_CALC_Y): Include stdlib.h, string.h - unconditionally. Do not declare perror. - * tests/conflicts.at (%nonassoc and eof): Include stdlib.h - unconditionally. - - * src/complain.c (_): Remove useless defn, as system.h defines this. - - * lib/bitset.h (__INT_TO_PTR): Remove; workaround no longer needed - with latest obstack.h. - * lib/ebitset.c (ebitset_elt_alloc): Don't bother to cast args - to procedure types, as obstack.h now does that for us. - * lib/lbitset.c (lbitset_elt_alloc): Likewise. - - * lib/subpipe.h [HAVE_SYS_TYPES_H]: Include <sys/types.h>, - so that this include file can stand alone. - * lib/subpipe.c: Do not include <sys/types.h>, as subpipe.h - does this now. Include subpipe.h first after config.h, to - test whether it can stand alone. - - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Don't - declare yyerror when using lalr.cc, as GCC 3.4.0 warns about the - unused declaration. - - * tests/synclines.at (%union synch line): Put a dummy member in - the union, because empty unions aren't allowed in C. Caught - by GCC 3.4.0. - -2004-04-13 Jim Meyering <jim@meyering.net> - - * src/conflicts.c (conflicts_print): Correct format string typo: - use `%%' to produce literal `%'. (trivial change) - -2004-03-30 Paul Eggert <eggert@twinsun.com> - - * src/getargs.c (version): Update copyright year to 2004. - - * data/c.m4 (b4_int_type): Use 'short int' rather than - 'short', and similarly for 'long', 'unsigned', etc. - * data/glr.c (YYTRANSLATE, yyconfl, yySymbol, yyItemNum, - yygetLRActions, yyprocessOneStack, yyrecoverSyntaxError, - yy_yypstack, yydumpstack): Likewise. - * data/lalr1.cc (user_token_number_max_, user_token_number_max_, - translate_, seq_, [], pop, Slice, range_, operator+, operator+=): - Likewise. - * data/yacc.c (b4_int_type, yyss, YYSTACK_BYTES, yysigned_char, - yy_stack_print, yyparse): Likewise. - * doc/bison.texinfo (Prologue, Multiple Types): Likewise. - * lib/bbitset.h (bitset_word, BITSET_WORD_BITS): Likewise. - * lib/bitset.c (bitset_print): Likewise. - * lib/bitset_stats.c (bitste_log_histogram_print): Likewise. - * lib/bitsetv-print.c (bitsetv_matrix_dump): Likewise. - * lib/bitsetv.c (bitsetv_dump): Likewise. - * lib/ebitset.c (EBITSET_ELT_BITS, ebitset_elt_alloc): Likewise. - * lib/lbitset.c (LBITSET_ELT_BITS, lbitset_elt_alloc, debug_lbitset): - Likewise. - * src/LR0.c (allocate_itemsets): Likewise. - * src/gram.h (rule_number, rule): Likewise. - * src/lalr.h (goto_number): Likewise. - * src/nullable.c (nullable_compute): Likewise. - * src/output.c (prepare_rules): Likewise. - * src/relation.c (relation_print, relation_digraph): Likewise. - * src/relation.h (relation_node): Likewise. - * src/state.h (state_number, transitions, errs, reductions, - struct state): Likewise. - * src/symtab.h (symbol_number, struct symbol): Likewise. - * src/tables.c (vector_number, tally, action_number, - default_goto, goto_actions): Likewise. - * tests/existing.at (GNU Cim Grammar): Likewise. - * tests/regression.at (Web2c Actions): Likewise. - - * src/output.c (muscle_insert_short_int_table): Renamed from - muscle_insert_short_table. All uses changed. - -2004-03-25 Paul Hilfinger <hilfingr@tully.CS.Berkeley.EDU> - - * src/parse-gram.y: Define PERCENT_EXPECT_RR. - (declaration): Replace expected_conflicts with expected_sr_conflicts. - Add %expect-rr rule. - - * src/scan-gram.l: Recognize %expect-rr. - - * src/conflicts.h (expected_sr_conflicts): Rename from - expected_conflicts. - (expected_rr_conflicts): Declare. - - * src/conflicts.c (expected_sr_conflicts): Rename from - expected_conflicts. - (expected_rr_conflicts): Define. - (conflicts_print): Check r/r conflicts against expected_rr_conflicts - for GLR parsers. - Use expected_sr_conflicts in place of expected_conflicts. - Warn if expected_rr_conflicts used in non-GLR parser. - - * doc/bison.texinfo: Add documentation for %expect-rr. - -2004-03-08 Paul Eggert <eggert@gnu.org> - - Add support for hex token numbers. Suggested by Odd Arild Olsen in - <http://lists.gnu.org/archive/html/bison-patches/2004-03/msg00000.html>. - - * NEWS: Document hexadecimal tokens, no NUL bytes, %destructor - in lalr1.cc. - * doc/bison.texinfo (Token Decl): Add hexadecimal token numbers. - * src/scan-gram.l (scan_integer): New function. - ({int}): Use it. - (0[xX][0-9abcdefABCDEF]+): New pattern, to support hex numbers. - (<SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER>, \\x[0-9abcdefABCDEF]+, - handle_action_dollar, handle_action_at, convert_ucn_to_byte): - Say "long int", not "long", for uniformity with GNU style. - -2004-02-25 Paul Eggert <eggert@twinsun.com> - - * tests/local.at (AT_COMPILE, AT_COMPILE_CXX): Ignore stdout from - compilers. This fixes a problem with Intel's C++ compiler being - chatty, reported by Guido Trentalancia in - <http://lists.gnu.org/archive/html/bug-bison/2004-02/msg00030.html>. - -2004-02-09 Alexandre Duret-Lutz <adl@gnu.org> - - Support %destructor and merge error locations in lalr1.cc. - - * data/lalr1.cc (b4_cxx_destruct_def): New macro. - (Parser::stos_): Define unconditionally. - (Parser::destruct_): New method. Generate its body with - b4_yydestruct_generate. - (Parser::error_start_): New attribute. - (Parser::parse) <yyerrlab, yyerrlab1>: Call destruct_ on erroneous - token which are discarded. - (Parser::parse) <yyerrlab, yyerrorlab, yyerrlab1>: Update - error_start_ when erroneous token are discarded. - (Parser::parse) <yyerrlab1>: Compute the location of the error - token so that it covers all the discarded tokens. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Adjust so - it can be called with `%skeleton "lalr1.cc"', and do that. - -2004-02-02 Paul Eggert <eggert@twinsun.com> - - * src/Makefile.am (AM_CPPFLAGS): New macro. It mentions - $(top_srcdir)/lib and ../lib. This fixes a bug reported - by Paul Hilfinger; the old INCLUDES value didn't mention ../lib. - There's no need to mention top_builddir since Automake does that - for us. - (INCLUDES): Remove, as Automake says it's obsolescent. - Contents migrated into AM_CPPFLAGS as described above. - * lib/Makefile.am (INCLUDES): Remove; obsolescent. - -2004-01-14 Paul Hilfinger <hilfingr@CS.Berkeley.EDU> - - * data/glr.c (yytokenName): Bullet-proof against YYEMPTY token. - (yyreportSyntaxError): Handle case where lookahead token is - YYEMPTY. - -2004-01-13 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * data/glr.c: Put casts on uses of YYREALLOC and YYMALLOC so that - resulting parsers are compilable with C++. - -2003-12-23 Paul Eggert <eggert@twinsun.com> - - * config/depcomp, config/install-sh: Sync with Automake 1.8. - * src/output.c (output_skeleton): Rename local var. - * tests/input.at (Torturing the Scanner): Don't use \x0 or \0 in - Bison tokens, as this runs afoul of the 2003-10-07 change that - disallowed NUL bytes in character constants or string literals. - - * tests/local.at: Require Autoconf 2.59's Autotest. - * tests/testsuite.at: Don't include local.at, since we now assume - Autoconf 2.59 or later. Autoconf 2.59 had some problems with - including it. - * tests/Makefile.am ($(TESTSUITE)): Remove warning about ignoring - multiple inclusion warnings. - -2003-12-02 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (How Can I Reset the Parser): More about start - conditions. - From Bruno Haible. - -2003-11-18 Alexandre Duret-Lutz <adl@gnu.org> - - * doc/bison.texinfo (Bison Options): Escape `@' in `$@'. - -2003-10-07 Paul Eggert <eggert@twinsun.com> - - * tests/Makefile.am (clean-local): Don't run 'testsuite --clean' - if testsuite doesn't exist. - - * doc/bison.texinfo (Symbols): NUL bytes are not allowed in string - literals, unfortunately. - * src/scan-gram.l (<SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER>): - Complain about NUL bytes in character constants or string literals. - -2003-10-05 Paul Eggert <eggert@twinsun.com> - - * NEWS: Don't document %no-default-prec, as it's still - too experimental. - * doc/bison.texinfo: Document %no-default-prec only if - the defaultprec flag is set. Normally it's not. - -2003-10-04 Paul Eggert <eggert@twinsun.com> - - * data/glr.c (b4_rhs_value, b4_rhs_location): Yield a - non-modifiable lvalue, instead of a modifiable one. - * doc/bison.texinfo (Actions): Document that $$ can - be assigned to. Do not claim that $$ and $N are - array element references: user code should not rely on this. - -2003-10-01 Paul Eggert <eggert@twinsun.com> - - * src/parse-gram.h (PERCENT_NO_DEFAULT_PREC): New token. - (grammar_declaration): Use it. - * src/scan-gram.l: New token %no-default-prec. - * tests/conflicts.at: Revamp tests to use %no-default-prec. - * NEWS, doc/bison.texinfo: Document the above. - -2003-10-01 Akim Demaille <akim@epita.fr> - - VCG no longer supports long_straight_phase. - - * src/vcg.c, src/vcg.h: Remove the handling of long_straight_phase. - * src/print_graph.c (print_graph): Adjust. - -2003-09-30 Frank Heckenbach <frank@g-n-u.de> - and Paul Eggert <eggert@twinsun.com> - - * doc/bison.texinfo (Decl Summary, Contextual Precedence, - Table of Symbols): Document %default-prec. - * src/parse-gram.y (PERCENT_DEFAULT_PREC): New token. - (grammar_declaration): Set default_prec on %default-prec. - * src/scan-gram.l (%default-prec): New token. - * src/reader.h (default_prec): New flag. - * src/reader.c: Likewise. - (packgram): Handle it. - * tests/conflicts.at (%default-prec without %prec, - %default-prec with %prec, %default-prec 1): New tests. - -2003-09-30 Paul Eggert <eggert@twinsun.com> - - * tests/testsuite.at: Include local.at, not input.at, fixing - a typo in the 2003-08-25 patch. - -2003-08-27 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (yyparse) [__GNUC__]: "Use" yyerrorlab to pacify - GCC warnings. - -2003-08-26 Akim Demaille <akim@epita.fr> - - * config/announce-gen (print_changelog_deltas): Neutralize "<#" as - "<\#" to avoid magic from Gnus when posting parts of this script. - -2003-08-26 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (Parser::report_syntax_error_): New, extracted from - (Parser::parse): here. - Adjust: nerrs and errstatus is now replaced by... - (Parser::nerrs_, Parser::errstatus_): New. - -2003-08-25 Akim Demaille <akim@epita.fr> - - * config/announce-gen, Makefile.cfg: New. - * Makefile.am: Adjust. - * GNUmakefile, Makefile.maint: Update from CVS Autoconf, but - keeping local WGET and WGETFLAGS modifications from Paul Eggert. - -2003-08-25 Akim Demaille <akim@epita.fr> - - When reducing initial empty rules, Bison parser read an initial - location that is not defined. This results in garbage, and that - affects Bison's own parser. Therefore we need (i) to extend Bison - to support a means to initialize this location, and (ii) to use - this CVS Bison to fix CVS Bison's parser. - - * src/reader.h, reader.c (epilogue_augment): Remove, replace - with... - * src/muscle_tab.h, src/muscle_tab.c (muscle_code_grow): this. - * src/parse-gram.y: Adjust. - (%initial-action): New. - (%error-verbose): Since we require CVS Bison, there is no reason - not to use it. - * src/scan-gram.l: Adjust. - * src/Makefile.am (YACC): New, to make sure we use our own parser. - * data/yacc.c (yyparse): Use b4_initial_action. - -2003-08-25 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo: Don't promote stdout for error messages. - -2003-08-25 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (Parser::reduce_print_): Remove unused yyi. - From Alexandre Duret-Lutz. - -2003-08-25 Akim Demaille <akim@epita.fr> - - Version 1.875c. - -2003-08-25 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (Parser::stack_print_, YY_STACK_PRINT): New. - Use them. - -2003-08-25 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (Parser::reduce_print_): New. - Use it. - -2003-08-25 Akim Demaille <akim@epita.fr> - - Have lalr1.cc catch with Paul Eggert's patch to fix the infinite - error recovery loops. This patch is based on - <http://lists.gnu.org/archive/html/bison-patches/2003-06/msg00000.html>. - Also, augment the similarity between lalr1.cc and yacc.c. - Note: the locations of error recovery rules are not correct yet. - - * data/lalr1.cc: Comment changes to augment the similarity between - lalr1.cc and yacc.c. - (YYERROR): Goto to yyerrorlab, not yyerrlab1. - (yyerrlab1): Remove, but where it used to be (now the bottom part of - yyerrlab), when hitting EOF, pop the whole stack here instead of - merely falling thru the default error handling mechanism. - (yyerrorlab): New label, with the old contents of YYERROR, - plus the following change: pop the stack of rhs corresponding - to the production that invoked YYERROR. That is how Yacc - behaves (required by POSIX). - * tests/calc.at (AT_CHECK_CALC_LALR1_CC): No longer expected to - fail. - -2003-08-25 Akim Demaille <akim@epita.fr> - - Tune local.at so that people can "autom4te -l autotest calc.at -o - calc" for instance, to extract a sub test suite. - - * tests/testsuite.at: Move the initialization, Autotest version - requirement, and AT_TESTED invocation into... - * tests/local.at: here. - * tests/testsuite.at: Include it for compatibility with Autoconf - 2.57. - * tests/Makefile.am ($(TESTSUITE)): Report that the warning should - be ignore. - -2003-08-04 Paul Eggert <eggert@twinsun.com> - - Rework code slightly to avoid gcc -Wtraditional warnings. - * data/glr.c (yyuserMerge): Return void, not YYSTYPE. - The returned value is now stored in *YY0. All callers changed. - * src/output.c (merge_output): Adjust to the above change. - -2003-07-26 Paul Eggert <eggert@twinsun.com> - - * data/glr.c (YYASSERT): New macro. - (yyfillin, yydoAction, yyglrReduce, yysplitStack, - yyresolveStates, yyprocessOneStack): - Use `YYASSERT (FOO);' rather than `if (! (FOO)) abort ();'. - Derived from a suggestion by Frank Heckenbach. - -2003-07-25 Paul Eggert <eggert@twinsun.com> - - * data/glr.c (yyglrReduce): Don't use C89 string concatenation, - for portability to K&R C (after ansi2knr, presumably). See - <http://lists.gnu.org/archive/html/bison-patches/2003-06/msg00041.html> - by Frank Heckenbach, though I have omitted the structure-initialization - part of his glr-knr.diff patch since I recall that the Portable - C Compiler didn't require that change. - - Let the user specify how to allocate and free memory. - Derived from a suggestion by Frank Heckenbach in - <http://lists.gnu.org/archive/html/bison-patches/2003-06/msg00041.html>. - * data/glr.c (YYFREE, YYMALLOC, YYREALLOC): New macros. - All uses of free, malloc, realloc changed to use these macros, - and unnecessary casts removed. - * data/yacc.c (YYFREE, YYMALLOC): Likewise. - -2003-07-06 Matthias Mann <MatthiasMann@gmx.de> - - * data/lalr1.cc (operator<<(std::ostream&, const Position&)): - use s.empty() rather than s == "" to test for empty string; see - <http://lists.gnu.org/archive/html/bison-patches/2003-07/msg00003.html> - (trivial change) - -2003-06-25 Akim Demaille <akim@epita.fr> - - * config/depcomp, config/install-sh: Update from masters. - -2003-06-20 Paul Eggert <eggert@twinsun.com> - - * data/glr.c (YYLLOC_DEFAULT): Parenthesize arguments as needed, - and return properly parenthesized result. - * data/lalar1.cc (YYLLOC_DEFAULT): Likewise. - * data/yacc.c (YYLLOC_DEFAULT): Likewise. - Remove unnecessary parentheses from uses. - * doc/bison.texinfo (Location Default Action): Describe the - conventions for parentheses. - -2003-06-19 Paul Eggert <eggert@twinsun.com> - - * data/glr.c (yyremoveDeletes, yy_reduce_print, yyglrReduce, - yyreportTree): Do not assume that size_t is the same width as int, - when printing sizes. Print sizes using an unsigned format. - Problem reported by Frank Heckenbach in - <http://lists.gnu.org/archive/html/bison-patches/2003-06/msg00035.html>. - - Port to Forte Developer 7 C compiler. - * data/glr.c (struct YYLTYPE): If locations are not being used, - declare a single dummy member, as empty structs do not conform - to the C standard. - (YYERROR, YYBACKUP): Do not use "do { ...; return foo; } while (0)"; - the Forte Developer 7 C compiler complains that end-of-loop - code is not reached. - -2003-06-17 Paul Eggert <eggert@twinsun.com> - - * lib/libiberty.h (PARAMS): Spell argument as Args, not as X, to - avoid warnings from picky compilers about redefinition of PARAMS. - -2003-06-17 Paul Eggert <eggert@twinsun.com> - - Version 1.875b. - - * NEWS: Document 1.875b. - - * lib/bbitset.h: Do not include config.h; that's the includer's job. - Do not include <sys/types.h>; shouldn't be needed on a C89 host. - * lib/bitset.h (bitset_compatible_p): Indent as per GNU standard. - Don't use 'index' in comments, as it's a builtin fn on some hosts. - * lib/bitset_stats.c: Include gettext.h unconditionally, as - per recent gettext manual's suggestion. - * lib/ebitset.c (ebitset_resize, ebitset_unused_clear): - Use prototypes, not old-style definitions. - * lib/lbitset.c (lbitset_unused_clear): Likewise. - * lib/vbitset.c (vbitset_resize, vbitset_ones, vbitset_zero, - vbitset_empty_p, vbitset_copy1, vbitset_not, vbitset_equal_p, - vbitset_subset_p, vbitset_disjoint_p, vbitset_and, vbitset_and_cmp, - vbitset_andn, vbitset_andn_cmp, vbitset_or, vbitset_or_cmp, - vbitset_xor, vbitset_xor_cmp, vbitset_and_or, vbitset_and_or_cmp, - vbitset_andn_or, vbitset_andn_or_cmp, vbitset_or_and, - vbitset_or_and_cmp, vbitset_copy): Likewise. - - * lib/libiberty.h: Do not include config.h; that's the includer's job. - Do not include <stdlib.h>. - (PARAMS): Define unconditionally for C89. - (ATTRIBUTE_NORETURN): Remove. - (ATTRIBUTE_UNUSED): Define unconditionally. - - Upgrade to 2003-06-08 libbitset, submitted by Michael Hayes in: - <http://lists.gnu.org/archive/html/bison-patches/2003-06/msg00005.html> - * lib/Makefile.am (bitsets_sources): Add vbitset.c, vbitset.h. - * lib/vbitset.c, lib/vbitset.h: New files. - * lib/abitset.c, lib/bbitset.h, lib/bitset.c, lib/bitset.h, - lib/bitset_stats.c, lib/ebitset.c, lib/lbitset.c: Import - from libbitset. - - * doc/bison.texinfo (How Can I Reset the Parser): Renamed from - `How Can I Reset @code{yyparse}', since texinfo does not allow - arbitrary @ in node names. - - * m4/Makefile.am (EXTRA_DIST): Add the following files, which - shouldn't be needed according to the gettext 0.12.1 documentation - but which seem to be needed anyway: codeset.m4 glibc21.m4 - intdiv0.m4 inttypes-pri.m4 inttypes.m4 inttypes_h.m4 isc-posix.m4 - lcmessage.m4 nls.m4 po.m4 stdint_h.m4 uintmax_t.m4 ulonglong.m4. - * po/Makefile.in.in: Upgrade to gettext 0.12.1 version. - - * lib/.cvsignore: Add stdbool.h. - * m4/.cvsignore: Add nls.m4, po.m4. - - Upgrade to CVS gnulib. - * stdbool_.h: File renamed from stdbool.h.in. - * configure.ac (AM_STDBOOL_H): Invoke this instead of - AC_HEADER_STDBOOL. - (AM_GNU_GETTEXT): Put brackets around args, as latest manual suggests. - (AM_GNU_GETTEXT_VERSION): Update to 0.12.1. - * lib/Makefile.am (EXTRA_DIST): Add stdbool_.h. - (MOSTLYCLEANFILES): New var. - ($(libbison_a_OBJECTS)): Depend on $(STDBOOL_H). - (stdbool.h): New rule. - * lib/dirname.c, lib/dirname.h, lib/hash.c, lib/hash.h, - lib/malloc.c, lib/obstack.h, lib/quote.c, lib/realloc.c, - lib/strcasecmp.c, lib/xalloc.h, m4/alloca.m4, m4/onceonly.m4, - m4/quote.m4: Upgrade to today's gnulib. - - * tests/calc.at (AT_CHECK_CALC): New option EXPECTED-TO-FAIL. - (AT_CHECK_CALC_LALR1_CC): Use it, since the C++ LALR parser fails - the tests right now. - * tests/cxx-type.at (_AT_TEST_GLR_CXXTYPES): Ensure yylex and - yyerror are declared before use; C99 requires this. - -2003-06-09 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * data/glr.c (YYERROR): Update definition to reset yyerrState to 0 - first. - (yyrecoverSyntaxError): Correct the logic for setting and testing - yyerrState. - Correct comment on handling EOF. - Allow states with only a default reduction, rather than failing - (I can't quite reconstruct why these were not allowed before). - - Fixes to avoid problem that $-N rules in GLR parsers can cause - buffer overruns, corrupting state. - - * src/output.c (prepare_rules): Output max_left_semantic_context - definition. - * src/reader.h (max_left_semantic_context): New variable declaration. - * src/scan-gram.l (max_left_semantic_context): Define. - (handle_action_dollar): Update max_left_semantic_context. - * data/glr.c (YYMAXLEFT): New definition. - (yydoAction): Increase size of yyrhsVals by YYMAXLEFT. - (yyresolveAction): Ditto. - - Fixes to problems with location handling in GLR parsers reported by - Frank Heckenbach (2003/06/05). - - * data/glr.c (YYLTYPE): Make trivial if locations not used. - (YYRHSLOC): Add parentheses, and define only if locations used. - (YYLLOC_DEFAULT): Add parentheses, and give trivial definition if - locations not used. - (yyuserAction): Use YYLLOC_DEFAULT to set *yylocp. - (yydoAction): Remove redundant initialization of *yyvalp and *yylocp. - - * tests/cxx-type.at: Exercise location information; update tests - to differentiate output with and without locations. - Remove forward declarations of yylex and yyerror---caused errors - because default YYLTYPE not yet defined. - Change semantic actions to compute strings, rather than printing - them directly (to test proper passing of semantics values). Change - output to prefix notation and update test data and expected results. - (yylex): Track locations. - (stmtMerge): Return value rather than printing, and include arguments - in value. - -2003-06-03 Paul Eggert <eggert@twinsun.com> - - Avoid warnings generated by GCC 2.95.4 when Bison is - configured with --enable-gcc-warnings. - * data/lalr1.cc (yy::]b4_parser_class_name[::parse, - yy::]b4_parser_class_name[::translate_, - yy::Stack::operator[] (unsigned), - yy::Stack::operator[] (unsigned) const, - yy::Slice::operator[] (unsigned), - yy::Slice::operator[] (unsigned) const): - Rename local vars to avoid warnings. - * tests/glr-regression.at (Improper handling of embedded actions - and $-N in GLR parsers): Remove unused local variable from yylex. - * tests/regression.at (_AT_DATA_DANCER_Y): Declare yylex to take - (void) as arg when not pure, since we now assume C89 when building - Bison. Pacify GCC by using parameter. - -2003-06-02 Paul Eggert <eggert@twinsun.com> - - * data/lalr1.cc (yy::Position::lines, yy::Position::columns, - yy::Location::lines, yy::Location::columns): Rename arguments - to avoid shadowing; this removes a warning generated by GCC 3.3. - -2003-06-01 Paul Eggert <eggert@twinsun.com> - - Don't pass C-only warning optins (e.g., -Wmissing-declarations) - to g++, as GCC 3.3 complains if you do it. - * configure.ac (WARNING_CXXFLAGS): New subst. Set it to - everything that WARNING_CFLAGS has, except omit warnings - not suitable for C++. - (AC_PROG_CXX): Use this instead of AC_CHECK_PROGS([CXX], [g++]). - * tests/atlocal.in (CXXFLAGS): New var. - * tests/local.at (AT_COMPILE_CXX): Use it instead of CFLAGS. - - Fix a GLR parser bug I reported in February; see - <http://lists.gnu.org/archive/html/bison-patches/2003-02/msg00008.html>. - The problem was that GLR parsers did not conform to the C standard, - because actions like { $1 = $2 + $3; } expanded to expressions - that invoked YYFILL in separate subexpressions, and YYFILL assigned - to a local variable. The C standard says that expressions - like (var = f ()) + (var = f ()) have undefined behavior. - Another problem was that GCC sometimes issues warnings that - yyfill and its parameters are unused. - - * data/glr.c (yyfillin): Renamed from the old yyfill. Mark - as possibly unused. - (yyfill): New function. - (YYFILL): Use it. - (yyuserAction): Change type of yynormal to bool, so that it matches - the new yyfill signature. Mark it as possibly unused. - - - Follow up on a bug I reported in February, where a Bison-generated - parser can loop. Provide a test case and a fix for yacc.c. I - don't have a fix for lalr1.cc or for glr.c, unfortunately. - The original bug report is in: - <http://lists.gnu.org/archive/html/bison-patches/2003-02/msg00044.html> - - * data/yacc.c (YYERROR): Now just 'goto yyerrorlab', since the - macro's size was becoming unwieldy. - (yyerrlab): Do not discard an empty lookahead symbol, as this - might destroy garbage. - (yyerrorlab): New label, with the old contents of YYERROR, - plus the following change: pop the stack of rhs corresponding - to the production that invoked YYERROR. That is how Yacc - behaves, and POSIX requires this behavior. - (yyerrlab1): Use YYPOPSTACK instead of its definiens. - * tests/calc.at (_AT_DATA_CALC_Y): Include unistd.h if available. - Define 'alarm' to do nothing if unistd.h is not available. - Add a new rule "exp: '-' error;" to test the above change to - data/yacc.c. Use 'alarm' to abort any test taking longer than - 10 seconds, as it's probably looping. - (AT_CHECK_CALC): Test recovery from error in new grammar rule. - Also, the new yacc.c generates two fewer diagnostics for an - existing test. - -2003-05-24 Paul Eggert <eggert@twinsun.com> - - * data/glr.c (YYSTACKEXPANDABLE): Do not evaluate - YYSTYPE_IS_TRIVIAL or YYSTYPE_IS_TRIVIAL unless they are defined. - This fixes a problem reported by John Bowman when the Compaq/HP - Alpha cxx compiler happy (e.g. using cxx -D__USE_STD_IOSTREAM - -ansi -Wall -gall). - * data/yacc.c (union yyalloc): Likewise. - (YYCOPY): Do not evaluate __GNUC__ unless it is defined. - - Switch from 'int' to 'bool' where that makes sense. - - * lib/abitset.c (abitset_test, abitset_empty_p, abitset_equal_p, - abitset_subset_p, abitset_disjoint_p, abitset_and_cmp, - abitset_andn_cmp, abitset_or_cmp, abitset_xor_cmp, abitset_and_or, - abitset_and_or_cmp, abitset_andn_or_cmp, abitset_or_and_cmp): - Return or accept bool, not int. All callers changed. - * lib/bbitset.h: (bitset_toggle_, bitset_copy_, bitset_and_or_cmp_, - bitset_andn_or_cmp_, bitset_or_and_cmp_): Likewise. - * lib/bitset.c (bitset_only_set_p, bitset_print, bitset_toggle_, - bitset_copy_, bitset_op4_cmp, bitset_and_or_cmp_, bitset_andn_or_cmp_, - bitset_or_and_cmp_): Likewise. - * lib/bitset.h (bitset_test, bitset_only_set_p): Likewise. - * lib/bitset_stats.c (bitset_stats_print, bitset_stats_toggle, - bitset_stats_test, bitset_stats_empty_p, bitset_stats_disjoint_p, - bitset_stats_equal_p, bitset_stats_subset_p, bitset_stats_and_cmp, - bitset_stats_andn_cmp, bitset_stats_or_cmp, bitset_stats_xor_cmp, - bitset_stats_and_or_cmp, bitset_stats_andn_or_cmp, - bitset_stats_or_and_cmp): Likewise. - * lib/ebitset.c (ebitset_elt_zero_p, ebitset_equal_p, ebitset_copy_cmp, - ebitset_test, ebitset_empty_p, ebitset_subset_p, ebitset_disjoint_p, - ebitset_op3_cmp, ebitset_and_cmp, ebitset_andn_cmp, ebitset_or_cmp, - ebitset_xor_cmp): Likewise. - * lib/lbitset.c (lbitset_elt_zero_p, lbitset_equal_p, lbitset_copy_cmp, - lbitset_test, lbitset_empty_p, lbitset_subset_p, lbitset_disjoint_p, - lbitset_op3_cmp, lbitset_and_cmp, lbitset_andn_cmp, lbitset_or_cmp, - lbitset_xor_cmp): Likewise. - * lib/bbitset.h: Include <stdbool.h>. - (struct bitset_vtable): The following members now return bool, not - int: toggle, test, empty_p, disjoint_p, equal_p, subset_p, - and_cmp, andn_cmp, or_cmp, xor_cmp, and_or_cmp, andn_or_cmp, - or_and_cmp). - * src/conflicts.c (count_rr_conflicts): Likewise. - * lib/bitset_stats.h (bitset_stats_enabled): Now bool, not int. - All uses changed. - * lib/ebitset.c (ebitset_obstack_init): Likewise. - * lib/lbitset.c (lbitset_obstack_init): Likewise. - * src/getargs.c (debug_flag, defines_flag, locations_flag, - no_lines_flag, no_parser_flag, token_table_flag, yacc_flag, - graph_flag): Likewise. - * src/getargs.h (debug_flag, defines_flag, locations_flag, - no_lines_flag, no_parser_flag, token_table_flag, yacc_flag, - graph_flag): Likewise. - * src/output.c (error_verbose): Likewise. - * src/output.h (error_verbose): Likewise. - * src/reader.c (start_flag, typed): Likewise. - * src/reader.h (typed): Likewise. - * src/getargs.c (LOCATIONS_OPTION): New constant. - (long_options, getargs): Use it. - * src/lalr.c (build_relations): Use bool, not int. - * src/nullable.c (nullable_compute): Likewise. - * src/print.c (print_reductions): Likewise. - * src/tables.c (action_row, pack_vector): Likewise. - * src/muscle_tab.h (MUSCLE_INSERT_BOOL): New macro. - * src/output.c (prepare): Use it. - * src/output.c (token_definitions_output, - symbol_destructors_output, symbol_destructors_output): Use string, - not boolean integer, to keep track of whether to output separator. - * src/print_graph.c (print_core): Likewise. - * src/state.c (state_rule_lookaheads_print): Likewise. - - * config/install-sh: Sync from automake 1.7.5. - -2003-05-14 Paul Eggert <eggert@twinsun.com> - - * src/parse-gram.y (rules_or_grammar_declaration): Require a - semicolon after a grammar declaration, in the interest of possible - future changes to the Bison input language. - Do not allow a stray semicolon at the start of the grammar. - (rhses.1): Allow one or more semicolons after any rule, including - just before "|" as required by POSIX. - * tests/input.at (Torturing the Scanner): Add tests for ";|" in a - grammar. - -2003-05-14 Alexandre Duret-Lutz <adl@gnu.org> - - %parse-param support for lalr1.cc. - - * data/lalr1.cc (b4_parse_param_decl, b4_parse_param_cons, - b4_cc_constructor_calls, b4_cc_constructor_call, - b4_parse_param_vars, b4_cc_var_decls, b4_cc_var_decl): New m4 - definitions. - (yy::b4_parser_class_name::b4_parser_class_name): Take extra - parse-param arguments. - (yy::b4_parser_class_name): Declare instance variables to - hold parse-param arguments. - * tests/calc.at: s/value/semantic_value/ because value clashes - with a member of yy::b4_parser_class_name. Adjust C++ code - to handle %parse-param. Enable %parse-param test in C++. - -2003-05-12 Paul Eggert <eggert@twinsun.com> - - * doc/bison.texinfo (How Can I Reset @code{yyparse}): Reword the - English a bit. Fix fclose typo. Change "const char" to "char - const", and use ANSI C rather than K&R for "main". Suggest - YY_FLUSH_BUFFER over yyrestart (as that is what Flex recommends) - and suggest yy_switch_to_buffer. - -2003-05-05 Paul Eggert <eggert@twinsun.com> - - * lib/bitset.h (__INT_TO_PTR): Define to a value that presumes - C89. This avoids a diagnostic on compilers that define __STDC__ - to 0, fixing a problem with Tru64 cc reported by Martin Mokrejs in - <http://lists.gnu.org/archive/html/bug-bison/2003-04/msg00041.html>. - -2003-05-03 Paul Eggert <eggert@twinsun.com> - - * lib/bitset.h (BITSET_FOR_EACH, BITSET_FOR_EACH_REVERSE): - Do not overrun array bounds. - This should fix a bug reported today by Olatunji Oluwabukunmi in - <http://lists.gnu.org/archive/html/bug-bison/2003-05/msg00004.html>. - -2003-04-29 Akim Demaille <akim@epita.fr> - - * src/gram.h, src/gram.c (pure_parser, glr_parser): Move to... - * src/getargs.c, src/getargs.h: here, as bool, not int. - (nondeterministic_parser): New. - * src/parse-gram.y, src/scan-gram.l: Support - %nondeterministic-parser. - * src/output.c (prepare): Use nondeterministic_parser instead - of glr_parser where appropriate. - * src/tables.c (conflict_row, action_row, save_row) - (token_actions, token_actions, pack_vector): Ditto. - -2003-04-29 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (C++ Parsers, Implementing Loops): New. - -2003-04-29 Akim Demaille <akim@epita.fr> - - * tests/calc.at: Also test yacc.c and glr.c (but not lalr1.cc yet) - with %pure-parser and %locations to exercise the patch from Yakov - Markovitch below. - -2003-04-28 Tim Van Holder <tim.van.holder@pandora.be> - - * data/yacc.c: (b4_lex_param): Corrected for the case where - %lex-param is provided and %pure-parser isn't. - -2003-04-27 Paul Eggert <eggert@twinsun.com> - - Avoid gcc -Wundef warnings reported by Gerald Pfeifer in - <http://lists.gnu.org/archive/html/bug-bison/2003-04/msg00044.html>. - * data/yacc.c (YYSTACK_ALLOC): Don't evaluate YYSTACK_USE_ALLOCA - if it is not defined. - (YYMAXDEPTH): Don't evaluate YYMAXDEPTH if it is not defined. - -2003-04-26 Paul Eggert <eggert@twinsun.com> - - * data/lalr1.cc (yy::Parser::pact_ninf_, yy::Parser::table_ninf_): - Declare to be of type suitable for the ninf value itself, not of - type suitable for the corresponding table, since the latter might - be unsigned but the ninf value might be negative. This fixes a - bug reported by Alexandre Duret-Lutz in - <http://lists.gnu.org/archive/html/bug-bison/2003-04/msg00017.html>. - - * configure.ac (AC_FUNC_ERROR_AT_LINE): Remove, since gl_ERROR - invokes it. We shouldn't invoke it twice because it will attempt - to put error.o in the archive twice. This fixes a glitch reported - by Martin Mokrejs in - <http://lists.gnu.org/archive/html/bug-bison/2003-04/msg00041.html>. - -2003-04-21 Paul Eggert <eggert@twinsun.com> - - * m4/error.m4: Update from Bruno Haible's 2003-04-14 patch - to gnulib. - -2003-04-21 Yakov Markovitch <Markovitch@iso.ru> - - * data/glr.c (yyexpandGLRStack) [!YYSTACKEXPANDABLE]: - Fix obvious typo that results in uncompilable GLR parsers - when both %pure-parser and %locations are used. (trivial change) - -2003-04-17 Paul Eggert <eggert@twinsun.com> - - * src/scan-gram.l: Add %option nounput, since we no longer use unput. - (unexpected_eof): Renamed from unexpected_end_of_file, for brevity. - Do not insert the expected token via unput, as this runs afoul - of a POSIX-compatibility bug in flex 2.5.31. - All uses changed to BEGIN the parent state, - since we no longer insert the expected token via unput. - * tests/regression.at (Invalid inputs): Remove cascaded diagnostic - that is no longer emitted after the above change. - - * src/conflicts.c (set_conflicts): Resolve all conflicts, not just - the first one. This change is from Paul Hilfinger, and it fixes - regression reported by Werner Lemberg in - <http://lists.gnu.org/archive/html/bug-bison/2003-04/msg00026.html>. - - (resolve_sr_conflict): Don't invoke state_errs_set - unless one or more tokens have been explicitly made errors. - Otherwise, the above change causes Bison to abort. - - * tests/existing.at (GNU pic Grammar): New test case, taken from - Lemberg's email. - -2003-03-31 Akim Demaille <akim@epita.fr> - - * doc/Makefile.am (AM_MAKEINFOFLAGS): Don't split the info file. - -2003-03-31 Akim Demaille <akim@epita.fr> - - * src/output.c (prepare_symbols): Avoid trailing spaces in the - output. - -2003-03-31 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Strings are Destroyed): s/losses/loses/. - From Paul Hilfinger. - -2003-03-29 Akim Demaille <akim@epita.fr> - - * m4/error.m4: Do not put under dynamic conditions some code which - expansion is under static control. - -2003-03-29 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (How Can I Reset @code{yyparse}): New. - -2003-03-29 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Strings are Destroyed): New. - -2003-03-13 Paul Eggert <eggert@twinsun.com> - - * .cvsignore: Add configure.lineno. - * src/.cvsignore: Add yacc. - * tests/.cvsignore: Add testsuite.log. - * doc/fdl.texi: Sync with latest FSF version. - -2003-03-12 Paul Eggert <eggert@twinsun.com> - - * scan-gram.l (YY_USER_INIT): Initialize code_start, too. - (<INITIAL><<EOF>>, <SC_PRE_CODE><<EOF>>): Set *loc to the scanner - cursor, instead of leaving it undefined. This fixes a bug - reported by Tim Van Holder in - <http://lists.gnu.org/archive/html/bug-bison/2003-03/msg00023.html>. - * tests/input.at (Torturing the Scanner): Test the scanner on - an empty input file, which was Tim Van Holder's test case. - - * m4/timevar.m4 (BISON_PREREQ_TIMEVAR): When checking whether - <sys/resource.h> can be included, include sys/time.h and - sys/times.h first, if available. This works around the SunOS - 4.1.4 porting bug reported by Bruce Becker in - <http://lists.gnu.org/archive/html/bug-bison/2003-03/msg00018.html>. - - * m4/subpipe.m4 (BISON_PREREQ_SUBPIPE): Don't - AC_CHECK_HEADERS([sys/wait.h]), as this interferes with - AC_HEADER_SYS_WAIT. - - Merge changes from gnulib. This was prompted because the CVS - snapshot didn't build on Solaris 7 due to strnlen problems. - - These changes need to be merged back into gnulib: - * lib/hash.c: Include <stdbool.h> unconditionally. - * m4/onceonly.m4 (m4_quote): New macro. - (AC_CHECK_HEADERS_ONCE, AC_CHECK_FUNCS_ONCE, AC_CHECK_DECLS_ONCE): - Quote AC_FOREACH variable-expansions properly. - The 2003-01-03 obstack.h change also needs merging. - {end of changes requiring merging} - - * lib/stdbool.h.in, m4/alloca.m4, m4/dirname.m4, m4/dos.m4, - m4/getopt.m4, m4/hash.m4, m4/malloc.m4, m4/memchr.m4, - m4/memrchr.m4, m4/obstack.m4, m4/onceonly.m4, m4/quote.m4, - m4/quotearg.m4, m4/realloc.m4, m4/stpcpy.m4, m4/strnlen.m4, - m4/strtol.m4, m4/strtoul.m4, m4/unlocked-io.m4, m4/xalloc.m4: - New files, imported from gnulib. - * m4/Makefile.am (EXTRA_DIST): Add the new m4/*.m4 files mentioned - above. - - * lib/mbswidth.c, m4/error.m4, m4/mbrtowc.m4, m4/mbswidth.m4, - m4/memcmp.m4, m4/prereq.m4, m4/stdbool.m4: Update to current - gnulib sources. - - * configure.ac (gl_DIRNAME, gl_GETOPT, gl_HASH, gl_QUOTE, gl_XALLOC): - Add. - (gl_ERROR): New, replacing jm_PREREQ_ERROR. - (gl_FUNC_ALLOCA): New, replacing AC_FUNC_ALLOCA. - (gl_FUNC_STPCPY): New, replacing AC_REPLACE_FUNCS(stpcpy). - (gl_FUNC_STRNLEN): New, replacing AC_FUNC_STRNLEN. - (gl_MBSWIDTH): New, replacing jm_PREREQ_MBSWIDTH. - (gl_OBSTACK): New, replacing AC_FUNC_OBSTACK. - (gl_QUOTEARG): New, replacing jm_PREREQ_QUOTEARG. - (jm_FUNC_GLIBC_UNLOCKED_IO, gl_FUNC_STPCPY, gl_FUNC_STRTOL): New. - (jm_FUNC_MALLOC): New, replacing AC_FUNC_MALLOC. - (jm_FUNC_REALLOC): New, replacing AC_FUNC_REALLOC. - (jm_PREREQ_ARGMATCH): Remove. - (AC_REPLACE_FUNCS): Remove memchr, memrchr, stpcpy, strtol, strtoul. - * lib/Makefile.am (libbison_a_SOURCES): Add argmatch.c, argmatch.h. - - * src/system.h: Include <stdbool.h> unconditionally. - - * lib/bbitset.h: Include <limits.h> unconditionally. We have been - assuming at least C89 in the bitset code for some time now. - -2003-03-03 Akim Demaille <akim@epita.fr> - - * ro.po: New. - -2003-03-02 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Table of Symbols): Reactivate the - documentation for %lex-param, and %parse-param. - -2003-03-02 Akim Demaille <akim@epita.fr> - - * data/yacc.c, data/glr.c, data/lal1.cc: Use similar code to - generate verbose error messages. - Use the number of tokens as an upper bound in yytname, as it - cannot be a non terminal. - -2003-03-02 Akim Demaille <akim@epita.fr> - - * tests/regression.at (_AT_DATA_DANCER_Y): Fix the expected error - message. - -2003-03-02 Akim Demaille <akim@epita.fr> - - * tests/regression.at (_AT_DATA_DANCER_Y, AT_CHECK_DANCER): New. - Use them to exercise yycheck overrun. - Based on Andrew Suffield's grammar. - -2003-03-02 Akim Demaille <akim@epita.fr> - - Create tests/local.at for Bison generic testing macros. - - * tests/calc.at (AT_CHECK_PUSHDEFS, AT_CHECK_POPDEFS): Move to... - * tests/local.at (AT_BISON_OPTION_PUSHDEFS, AT_BISON_OPTION_POPDEFS): - This new file. - * tests/calc.at (AT_CHECK_CALC): Adjust. - * tests/testsuite.at (AT_DATA_GRAMMAR_PROLOGUE, AT_DATA_GRAMMAR) - (AT_COMPILE, AT_COMPILE_CXX, AT_PARSER_CHECK): Move to... - * tests/local.at: here. - (AT_COMPILE_CXX): Tags the tests using it as c++. - Ignore the test if CXX is not functional. - -2003-03-01 Paul Eggert <eggert@twinsun.com> - - * src/scan-gram.l (code_start): Initialize it to scanner_cursor, - not loc->end, since loc->end might contain garbage and this leads - to undefined behavior on some platforms. - (id_loc, token_start): Use (IF_LINTed) initial values that do not - depend on *loc, so that the reader doesn't give the the false - impression that *loc is initialized. - (<INITIAL>"%%"): Do not bother setting code_start, since its value - does not survive the return. - -2003-03-01 Akim Demaille <akim@epita.fr> - - * src/scan-gram.l (code_start): Always initialize it when entering - into yylex, as SC_EPILOGUE is activated *before* the corresponding - yylex invocation. An alternative would be making it static, but - then it starts with the second %%'s beginning, instead of its end. - -2003-02-28 Paul Eggert <eggert@twinsun.com> - - * lib/mbswidth.c: Include <wchar.h> before "mbswidth.h", to work - around a UnixWare 7.1.1 porting bug reported by John Hughes in - <http://lists.gnu.org/archive/html/bug-bison/2003-02/msg00030.html>. - -2003-02-26 Paul Eggert <eggert@twinsun.com> - - * README: Mention compiler bug in Sun Forte Developer 6 update 2. - Remove Sequent/Pyramid discussion (nobody uses them any more). - Merge VMS and MS-DOS discussion; these ports may well be dead - but let's keep mentioning them for now. Put <> around email - addresses. Add copyright notice. - -2003-02-24 Paul Eggert <eggert@twinsun.com> - - * data/glr.c (yy_reduce_print): yylineno -> yylno, - to avoid collision with flex use of yylineno. - Problem reported by Bruce Lilly in - <http://lists.gnu.org/archive/html/bug-bison/2003-02/msg00016.html>. - * data/lalr1.cc (yy::]b4_parser_class_name[::parse): Likewise. - * data/yacc.c (yy_reduce_print): Likewise. - - * config/depcomp: Sync with Automake 1.7.3. - -2003-02-21 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc: Use temporary variables instead of casts to - change integer types. - Suggested by Paul Eggert. - -2003-02-21 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo: Use "location" consistently to refer to @n, - to avoid confusions with lalr1.cc's notion of Position. - Suggested by Paul Eggert. - -2003-02-20 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (position.hh): Make sure "columns" never pushes - before initial_columns. - (location.hh): Use consistent variable names when defining the - operator<<. - Use "last" so that we subtract from Positions, not from unsigned. - -2003-02-20 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (position.hh): New subfile, including the extended - and Doxygen'ed documentation of class Position. - (location.hh): Use it. - Document a` la Doxygen. - With the help of Benoit Perrot. - -2003-02-20 Akim Demaille <akim@epita.fr> - - * tests/calc.at (AT_CHECK_PUSHDEFS, AT_CHECK_POPDEFS): Define - AT_YACC_IF. - Redefine AT_YYERROR_SEES_LOC_IF using it. - (_AT_DATA_CALC_Y): Don't declare yyerror when lalr1.cc, as it is - not defined. - Don't use the location in yy::Parser::error_ and - yy::Parser::print_ when not %locations. - Activate more lalr1.cc tests. - -2003-02-19 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc: When displaying a line number, be sure to make it - an int. - -2003-02-19 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (b4_stack_depth_init, yy::Parser::initdepth_): - Remove, useless. - (YYABORT, YYACCEPT, YYERROR): New. - * tests/calc.at: Renable the lalr1.cc test. - -2003-02-19 Akim Demaille <akim@epita.fr> - - * tests/calc.at (AT_CHECK_CALC): Check different scenarios of - error recovery, mixing with/without pops and discarding of the - lookahead. - Exercise YYERROR. - Disable the lalr1.cc tests as currently it doesn't support YYERROR. - -2003-02-17 Paul Eggert <eggert@twinsun.com> - - * tests/atlocal.in (LDFLAGS, LIBS): New vars. - * tests/testsuite.at (AT_COMPILE): Use them. - This fixes the testsuite problem reported by Robert Lentz in - <http://lists.gnu.org/archive/html/bug-bison/2003-02/msg00011.html>. - -2003-02-12 Paul Eggert <eggert@twinsun.com> - - * data/yacc.c (yyerrlab) [YYERROR_VERBOSE]: - Avoid subscript error in yycheck. Bug reported by Andrew Suffield in - <http://lists.gnu.org/archive/html/bug-bison/2003-02/msg00003.html>. - * data/glr.c (yyreportSyntaxError) [YYERROR_VERBOSE]: Likewise. - Check for malloc failure, for consistency with yacc.c. - (yytname_size): Remove, for consistency with yacc.c. - - The bug still remains in data/lalr1.cc, as I didn't have time - to fix it there. - -2003-02-06 Akim Demaille <akim@epita.fr> - - * configure.ac (GXX): Rename as... - (CXX): this, to keep the original Autoconf semantics. - Require 2.57. - * data/lalr1.cc: Fix b4_copyright invocations. - If YYDEBUG is not defined, don't depend upon name_ being defined. - (location.hh): Include string and iostream. - (Position::filename): New member. - (Position::Position ()): New. - (operator<< (Position)): New. - (operator- (Position, int)): New. - (Location::first, Location::last): Rename as... - (Location::begin, Location::end): these, to mock the conventional - iterator names. - (operator<< (Location)): New. - * tests/atlocal.in (CXX): New. - * tests/testsuite.at (AT_COMPILE_CXX): New. - * tests/calc.at (_AT_DATA_CALC_Y): Adjust yyerror to report the - locations in a more synthetic way. - (AT_CHECK_PUSHDEFS): AT_YYERROR_SEES_LOC_IF is positive if - lalr1.cc is used. - Adjust the C locations to match those from Emacs: first column is - column 0. - Change all the expected results. - Conform to the GCS: simplify the locations when applicable. - (LOC, VAL, YYLLOC_FORMAL, YYLLOC_ARG, USE_YYLLOC, LEX_FORMALS) - (LEX_ARGS, USE_LEX_ARGS, LEX_PRE_FORMALS, LEX_PRE_ARGS): Replace - these CPP macros with the m4 macros new defined by... - (AT_CHECK_PUSHDEFS): this, i.e.: - (AT_LALR1_CC_IF, AT_PURE_LEX_IF, AT_LOC, AT_VAL, AT_LEX_FORMALS) - (AT_LEX_ARGS, AT_USE_LEX_ARGS, AT_LEX_PRE_FORMALS, AT_LEX_PRE_ARGS) - New macros. - (AT_CHECK_POPDEFS): Undefine them. - (AT_CHECK_CALC_LALR1_CC): New. - Use it for the first lalr1.cc test. - -2003-02-04 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc (YYLLOC_DEFAULT): Fix its definition: be based on - Location as is defined. - -2003-02-04 Akim Demaille <akim@epita.fr> - - * data/lalr1.cc: If YYDEBUG is not defined, don't depend upon - name_ being defined. - -2003-02-03 Paul Eggert <eggert@twinsun.com> - - * src/gram.h (start_symbol): Remove unused decl. - - Use more-consistent naming conventions for local vars. - - * src/derives.c (derives_compute): Change type of local var from - int to rule_number. - * src/gram.c (grammar_rules_partial_print): Likewise. - * src/print.c (print_core): Likewise. - * src/reduce.c (reduce_grammar_tables): Likewise. - - * src/gram.c (grammar_dump): Change name of item_number * - local var from r to rp. - * src/nullable.c (nullable_compute): Likewise. - - * src/gram.h (ISTOKEN, ISVAR): Use i, not s, for int var. - - * src/gram.h (symbol_number_as_item_number): Use sym, not s, - for symbol or symbol_number var. - * src/reader.c (grammar_start_symbol_set): Likewise. - * src/reader.h (grammar_start_symbol_set, grammar_symbol_append): - Likewise. - * src/state.c (transitions_to): Likewise. - * src/state.h: Likewise. - * src/tables.c (symbol_number_to_vector_number): Likewise. - - * src/muscle_tab.h (MUSCLE_OBSTACK_SGROW): Use p, not s, for - char * var. - - * src/parse-gram.y (lloc_default): Use loc, not r, for YYLTYPE - var. - - * src/scan-gram.l (no_cr_read): Use bytes_read, not s, for size - var. - - * src/system.h (xstrndup, strchr, strspn, strnlen, memchr, memrchr): - Use str, not s, for char * var. Use ch, not c, for character var. - Use size for size var. - - * src/uniqstr.c (uniqstr_new, uniqstr_assert): Use str, not s, for - char * var. - (uniqstr_print, uniqst_print_processor): Use ustr, not s, for - uniqstr var. - * src/uniqstr.h: Likewise. - - * src/vcg.c (get_color_str, get_textmode_str, get_shape_str, - get_layoutalgorithm_str, get_decision_str, get_orientation_str, - get_node_alignment_str, get_arrow_mode_str, get_crossing_type_str, - get_view_str, get_linestyle_str, get_arrowstyle_str): Rename - param to have same name as that of enum, so that we don't use - "s" to stand for a non-state. - -2003-02-02 Akim Demaille <akim@epita.fr> - - * src/scan-skel.l: Scan more than one inert character per yylex - invocation. - -2003-02-01 Paul Eggert <eggert@twinsun.com> - - Version 1.875a. - - * po/LINGUAS: Add ms. - -2003-01-30 Akim Demaille <akim@epita.fr> - - * doc/Makefile.am (CLEANFILES): Add bison.fns for distcheck. - -2003-01-29 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * tests/cxx-type.at: Correct apparent typo in Bison input: $$ instead - of $1. - - Changes in response to error report by S. Eken: GLR mode does not - handle negative $ indices or $ indices in embedded rules correctly. - See <http://lists.gnu.org/archive/html/bug-bison/2003-01/msg00076.html>. - - * data/glr.c (b4_rhs_value): Change to use YYFILL macro. - (b4_rhs_location): Ditto. - (yyfill): New function to copy from stack tree into array - incrementally. - (yyuserAction): Modify to allow incremental move of semantic values - to rhs array when in GLR mode. - Define YYFILL to use in user-defined actions to fill semantic array - as needed. - Remove dummy use of yystack, as there is now a guaranteed use. - (yydoAction): Modify to allow incremental move of semantic values - to rhs array when in GLR mode. - (yyresolveAction): Ditto. - (yyglrShiftDefer): Update comment. - (yyresolveStates): Use X == NULL for pointers, not !X. - (yyglrReduce): Ditto. - (yydoAction): Ditto - - * tests/glr-regr1.at: Rename to ... - * tests/glr-regression.at: Add new regression test for the problems - described above (adapted from S. Eken). - Update copyright notice. - * tests/testsuite.at: Rename glr-regr1.at to glr-regression.at. - * tests/Makefile.am: Ditto. - -2003-01-28 Paul Eggert <eggert@twinsun.com> - - * data/lalr1.cc: Do not use @output_header_name@ unless - b4_defines_flag is set. This fixes two bugs reported by - Tim Van Holder in - <http://lists.gnu.org/archive/html/bug-bison/2003-01/msg00071.html> - and <http://lists.gnu.org/archive/html/bug-bison/2003-01/msg00073.html>. - -2003-01-21 Paul Eggert <eggert@twinsun.com> - - * data/yacc.c (YYERROR): Move code from yyerrlab1 to here, so that - we don't need to worry about yyerrlab1 being reported as an - "unused label" by non-GCC C compilers. The downside is that if - locations are used then a couple of statements are duplicated each - time YYERROR is invoked, but the upside is that the warnings - should vanish. - (yyerrlab1): Move code to YERROR. - (yyerrlab2): Remove. Change uses back to yyerrlab1. - This reverts some of the 2002-12-27 change. - -2003-01-17 Paul Eggert <eggert@twinsun.com> - - * src/output.c (symbol_printers_output): Fix typo that led - to core dump. Problem reported by Antonio Rus in - <http://lists.gnu.org/archive/html/bug-bison/2003-01/msg00058.html>. - -2003-01-13 Akim Demaille <akim@epita.fr>, - Quoc Peyrot <chojin@lrde.epita.fr>, - Robert Anisko <anisko_r@lrde.epita.fr> - - * data/lalr1.cc (parse::yyerrlab1): When popping the stack, stop - when the stacks contain one element, as the loop would otherwise - free the last state, and then use the top state (the one we just - popped). This means that the initial elements will not be freed - explicitly, as is the case in yacc.c; it is not a problem, as - these elements have fake values. - -2003-01-11 Paul Eggert <eggert@twinsun.com> - - * NEWS: %expect-violations are now just warnings, reverting - to Bison 1.30 and 1.75 behavior. This fixes the GCC 3.2 - bootstrapping problem reported by Matthias Klose; see - <http://lists.gnu.org/archive/html/bug-bison/2003-01/msg00053.html>. - * src/conflicts.c (conflicts_print): Likewise. - * tests/conflicts.at (%expect not enough, %expect too much, - %expect with reduce conflicts): Likewise. - * doc/bison.texinfo (Expect Decl): Document this. Also mention - that the warning is enabled if the number of conflicts changes - (not necessarily increases). - - * src/getargs.c (version): Update copyright year. - -2003-01-09 Akim Demaille <akim@epita.fr> - - * src/Makefile.am, lib/Makefile.am: Use $(VAR) instead of @VAR@. - -2003-01-08 Paul Eggert <eggert@twinsun.com> - - * Makefile.maint (WGETFLAGS): - New macro, containing "-C off" to disable proxy caches. - All uses of $(WGET) changed to $(WGET) $(WGETFLAGS). - (rel-check): Use $(WGET) instead of wget. - -2003-01-06 Paul Eggert <eggert@twinsun.com> - - * doc/bison.texinfo (Generalized LR Parsing): Add a reference to - the GLR paper of Scott, Johnstone and Hussain. - -2003-01-04 Paul Eggert <eggert@twinsun.com> - - * configure.ac (AC_ARG_ENABLE): Add --disable-yacc. - (YACC_SCRIPT, YACC_LIBRARY): New vars to AC_SUBST. - * lib/Makefile.am (lib_LIBRARIES): liby.a -> @YACC_LIBRARY@. - (EXTRA_LIBRARIES): New var, for liby.a. - * src/Makefile.am (bin_SCRIPTS): yacc -> @YACC_SCRIPT@. - (EXTRA_SCRIPTS): New var, for yacc. - - * data/yacc.c (yyerrlab1): Omit attribute if __cplusplus is defined, - since GNU C++ (as of 3.2.1) does not allow attributes on labels. - Problem reported by Nelson H. F. Beebe. - -2003-01-03 Paul Eggert <eggert@twinsun.com> - - * lib/obstack.h (__INT_TO_PTR) [__STDC__]: Cast result to - (void *) to avoid diagnostic with native c89 on SGI IRIX 6.5 - when compiling Bison 1.875's `bitset bset = obstack_alloc - (bobstack, bytes);'. Problem reported by Nelson H. F. Beebe. - - * src/scan-skel.l (QPUTS): Omit redundant `;' from macro definition. - ([^@\n]): Renamed from [^@\n]+ so that the token buffer does not - grow to a huge size with typical invocation. - - * lib/hash.c (_Bool, bool, false, true, __bool_true_false_are_defined): - Use the pattern recommended by Autoconf 2.57, except also protect - against double-definition. - * src/system.h: Likewise. - Portability issues reported by Nelson H. F. Beebe. - - * data/glr.c (yybool): Renamed from bool, to avoid collisions in C. - All uses changed. Provide a definition in both C and C++. - (yytrue, yyfalse): Define even if defined (__cplusplus). - - * lib/bitset_stats.c (bitset_stats_list): Remove unused var. - Reported by Nelson H. F. Beebe. - - * src/scan-skel.l ("@oline@"): Output lineno+1, not lineno. - -2003-01-02 Paul Eggert <eggert@twinsun.com> - - * data/yacc.c (yyerrlab1): Append `;' after attribute, to - pacify the buggy "smart preprocessor" in MacOS 10.2.3. - Bug reported by Nelson H. F. Beebe. - -2003-01-01 Paul Eggert <eggert@twinsun.com> - - * Version 1.875. - -2002-12-30 Paul Eggert <eggert@twinsun.com> - - * src/scan-gram.l (<INITIAL,SC_AFTER_IDENTIFIER,SC_PRE_CODE>","): - Moved here from... - (<INITIAL>","): Here. This causes stray "," to be treated - more uniformly. - - * src/scan-gram.l (<SC_BRACED_CODE>"}"): Output ";" before the - last brace in braced code when not in Yacc mode, for compatibility - with Bison 1.35. This resurrects the 2001-12-15 patch to - src/reader.c. - - * src/reader.h (YYDECL): Use YYSTYPE, not its deprecated alias - yystype. This follows up the 2002-12-24 YYSTYPE bug fix. - -2002-12-28 Paul Eggert <eggert@twinsun.com> - - * src/symtab.c (symbol_make_alias): Set type of SYMVAL to be - that of SYM's type. This fixes Debian bug 168069, reported by - Thomas Olsson. - -2002-12-28 Paul Eggert <eggert@twinsun.com> - - Version 1.75f. - - Switch back to the Yacc style of conflict reports, undoing some - of the 2002-07-30 change. - * doc/bison.texinfo (Understanding): Use Yacc style for - conflict reports. Also, use new way of locating rules. - * src/conflicts.c (conflict_report): - Renamed from conflict_report_yacc, removing the old - 'conflict_report'. Translate the entire conflict report at once, - so that we don't assume that "," has the same interpretation in - all languages. - (conflicts_output): Use Yacc-style conflict report for each state, - instead of our more-complicated style. - (conflicts_print): Use Yacc-style conflict report, except print - the input file name when not emulating Yacc. - * tests/conflicts.at (Unresolved SR Conflicts, Defaulted - Conflicted Reduction, %expect not enough, %expect too much, - %expect with reduce conflicts): Switch to Yacc-style conflict reports. - * tests/existing.at (GNU Cim Grammar): Likewise. - * tests/glr-regr1.at (Badly Collapsed GLR States): Likewise. - - * src/complain.c (warn_at, warn, complain_at, complain, fatal_at, - fatal): Don't invoke fflush; it's not needed and it might even be - harmful for stdout, as stdout might not be open. - * src/reduce.c (reduce_print): Likewise. - -2002-12-27 Paul Eggert <eggert@twinsun.com> - - Fix a bug where error locations were not being recorded correctly. - This problem was originally reported by Paul Hilfinger in - <http://lists.gnu.org/archive/html/bug-bison/2002-11/msg00086.html>. - - * data/yacc.c (yyparse): New local var yylerrsp, to record the - top of the location stack's error locations. - (yyerrlab): Set it. When discarding a token, push its location - onto yylerrsp so that we don't lose track of the error's end. - (yyerrlab1): Now is only the target of YYERROR, so that we can - properly record the location of the action that failed. For GCC - 2.93 and later, insert an __attribute__ ((__unused__)) to avoid - GCC warning about yyerrlab1 being unused if YYERROR is unused. - (yyerrlab2): New label, which yyerrlab now falls through to. - Compute the error's location by applying YYLLOC_DEFAULT to - the locations of all the symbols that went into the error. - * doc/bison.texinfo (Location Default Action): Mention that - YYLLOC_DEFAULT is also invoked for syntax errors. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): - Error locations include the locations of all the tokens that were - discarded, not just the last token. - -2002-12-26 Paul Eggert <eggert@twinsun.com> - - * src/files.c: Include quote.h. - (compute_output_file_names): Warn if we detect conflicting - outputs to the same file. This should catch the misunderstanding - exemplified by Debian Bug 165349, reported by Bruce Stephens.. - - * src/conflicts.c (conflicts_print): If the user specifies - "%expect N", report an error if there are any reduce/reduce - conflicts. This is what the manual says should happen. - This fixes Debian bug 130890, reported by Anthony DeRobertis. - * tests/conflicts.at (%expect with reduce conflicts): New test. - - Don't use m4_include on relative file names, as it doesn't work as - desired if there happens to be a file with that name under ".". - - * m4sugar/version.m4: Remove; it was included but it wasn't used. - * data/Makefile.am (dist_m4sugar_DATA): Remove m4sugar/version.m4. - * data/m4sugar/m4sugar.m4: Don't include m4sugar/version.m4. - * data/glr.c, data/lalr1.cc, data/yacc.c: Don't include c.m4. - * src/output.c (output_skeleton): Use full path names when - specifying a file to include; don't rely on include path, as - it's unreliable when the working file contains a file with - that name. - -2002-12-25 Paul Eggert <eggert@twinsun.com> - - Remove obsolete references to bison.simple and bison.hairy. - Problem mentioned by Aubin Mahe in - <http://lists.gnu.org/archive/html/help-bison/2002-12/msg00010.html>. - * data/glr.c: Comment fix. - * doc/bison.1: Remove references. Also, mention "yacc". - - * src/getargs.c (getargs) [MSDOS]: Don't assume optarg != NULL - with -g option. - - * src/parse-gram.y (declaration): Use enum "report_states" rather - than its numeric value 1. - - * src/scan-skel.l ("@output ".*\n): Close any old yyout before - opening a new one. This fixes Debian bug 165349, reported by - Bruce Stephens. - -2002-12-24 Paul Eggert <eggert@twinsun.com> - - Version 1.75e. - - * Makefile.maint (cvs-update): Don't assume that the shell - supports $(...), as Solaris sh doesn't. - - * src/parse-gram.y (lloc_default): Remove test for empty - nonterminals at the end, since it didn't change the result. - -2002-12-24 Paul Eggert <eggert@twinsun.com> - - If the user does not define YYSTYPE as a macro, Bison now declares it - using typedef instead of defining it as a macro. POSIX requires this. - For consistency, YYLTYPE is also declared instead of defined. - - %union directives can now have a tag before the `{', e.g., the - directive `%union foo {...}' now generates the C code - `typedef union foo { ... } YYSTYPE;'; this is for Yacc compatibility. - The default union tag is `YYSTYPE', for compatibility with Solaris 9 - Yacc. For consistency, YYLTYPE's struct tag is now `YYLTYPE' - instead of `yyltype'. - - `yystype' and `yyltype' are now obsolescent macros instead of being - typedefs or tags; they are no longer documented and will be - withdrawn in a future release. - - * data/glr.c (b4_location_type): Remove. - (YYSTYPE): Renamed from yystype. - (YYSTYPE_IS_DECLARED): New macro, used to prevent double-typedef. - (struct YYLTYPE): Renamed from struct yyltype. - (YYLTYPE): Renamed from yyltype. - (yyltype, yystype): New (and obsolescent) macros, - for backward compatibility. - * data/yacc.c: Likewise. - - * data/yacc.c (YYSTYPE): Declare as union YYSTYPE if the user - does not specify a union tag. This is for compatibility with - Solaris 9 yacc. - - * src/parse-gram.y (add_param): 2nd arg is now char * not char - const *, since it is now modified by stripping surrounding { }. - (current_braced_code): Remove. - (PERCENT_DESTRUCTOR, PERCENT_PRINTER, PERCENT_UNION, - PERCENT_LEX_PARAM, PERCENT_PARSE_PARAM): Change names to include - trailing " {...}". Now of type <chars>. - (grammar_declaration): Adjust to bundled tokens. - (code_content): Remove; stripping is now done by add_param. - (print_token_value): Print contents of bundled tokens. - (token_name): New function. - - * src/reader.h (braced_code, current_braced_code): Remove. - (token_name): New decl. - - * src/scan-gram.l (handle_dollar, handle_at): Now takes int - token_type, not braced_code code_kind. All uses changed. - (SC_PRE_CODE): New state, for scanning after a keyword that - has (or usually has) an immediately-following braced code. - (token_type): New local var, to keep track of which token type - to return when scanning braced code. - (<INITIAL>"%destructor", <INITIAL>"%lex-param", - <INITIAL>"%parse-param", <INITIAL>"%printer", - <INITIAL>"%union"): Set token type and BEGIN SC_PRE_CODE - instead of returning a token type immediately. - (<INITIAL>"{"): Set token type. - (<SC_BRACED_CODE>"}"): Use it. - (handle_action_dollar, handle_action_at): Now returns bool - indicating success. Fail if ! current_rule; this prevents a core dump. - (handle_symbol_code_dollar, handle_symbol_code_at): - Remove; merge body into caller. - (handle_dollar, handle_at): Complain in invalid contexts. - - * NEWS, doc/bison.texinfo: Document the above. - * NEWS: Fix years and program names in copyright notice. - -2002-12-17 Paul Eggert <eggert@twinsun.com> - - * NEWS, doc/bison.texinfo (Parser Function, Pure Calling, Error - Reporting, Table of Symbols): Omit mentions of %lex-param and - %parse-param from the documentation for now. - -2002-12-15 Paul Eggert <eggert@twinsun.com> - - Undo most of the 2002-11-12 yychar -> yytoken patch, as it broke - GCC 3.2.1 (which depends on yychar == YYEMPTY when there is no - lookahead symbol, and which sets yychar in parser actions) and it - disagreed with the Bison documentation. Bug - reported by Andrew Walrond. - - * data/yacc.c (YYTRANSLATE): Don't check for negative argument, - as the caller now does that. - (yyclearin, YYBACKUP, yyparse): Use yychar, not yytoken. - (YYEMPTY): Parenthesize right hand side, since others use it. - (yyparse): Don't assume that our generated code is the only code - that sets yychar. - -2002-12-13 Paul Eggert <eggert@twinsun.com> - - Version 1.75d. - - POSIX requires a "yacc" command. - * src/Makefile.am (bin_SCRIPTS): New macro, for yacc. - (MOSTLYCLEANFILES): Add yacc. - (yacc): New rule. - * doc/bison.texinfo (Invocation, Bison Options): Mention yacc - as an alias for bison y. - - * po/LINGUAS: Add da. - - * src/getargs.c (__GNU_LIBRARY__) [lint]: Define to work around - problem with latest <getopt.h>. - (HACK_FOR___GNU_LIBRARY___PROTOTYPE): New macro. - - * doc/fdl.texi: Upgrade to 1.2. - * lib/alloca.c, lib/error.c, lib/getopt.c, lib/getopt.h - lib/getopt1.c, lib/gettext.h, lib/memrchr.c, lib/obstack.c, - lib/obstack.h, lib/strnlen.c, lib/unlocked-io.h: Sync with - gnulib. - * config/install-sh: Sync with autotools. - - Fix a bad interaction with flex 2.5.23 reported by Bruce Lilly in - <http://lists.gnu.org/archive/html/bug-bison/2002-11/msg00114.html>. - * data/yacc.c (YYLTYPE, struct yyltype): Do not define unless - locations are requested. - (union yyalloc): Do not depend on YYLTYPE_IS_TRIVIAL unless - locations are requested. - -2002-12-12 Paul Eggert <eggert@twinsun.com> - - Remove unportable casts and storage allocation tricks. - While we're at it, remove almost all casts, since they - usually aren't needed and are a sign of trouble. - - * configure.ac (AC_CHECK_TYPES): Check for uintptr_t. - - * src/derives.c (derives_compute): Do not subtract NTOKENS from - the pointer DSET returned by malloc; this isn't portable. - Instead, always use DSET[i - NTOKENS] rather than DSET[i]. - Similarly for DERIVES. - * src/lalr.c (set_goto_map): Likewise, for GOTO_MAP and TEMP_MAP. - * src/nullable.c (nullable_compute): Likewise, for RSETS and NULLABLE. - * src/reduce.c (reduce_grammar_tables): Likewise, for nontermmap - - * src/derives.c (derives_compute): Do not bother invoking - int_of_rule_number, since rule numbers are integers. - - * src/files.c (concat2, tr, compute_base_name): Use xmalloc (N) - rather than XMALLOC (char, N). - - * src/files.c (filename_split): Rewrite to avoid cast. - - * src/gram.h (symbol_number_as_item_number, - item_number_as_symbol_number, rule_number_as_item_number, - item_number_as_rule_number): - Now inline functions rather than macros, to avoid casts. - * src/state.h (state_number_as_int): Likewise. - * src/tables.c (state_number_to_vector_number, - symbol_number_to_vector_number): Likewise. - - * src/gram.h (int_of_rule_number): Remove; no longer used. - - * src/lalr.c (add_lookback_edge): Use malloc rather than calloc, - since the resulting storage is always stored into. - - * src/main.c (alloca) [C_ALLOCA]: Add decl here, the only place - where it's needed. - - * src/muscle_tab.c (muscle_m4_output): - Now inline. Return bool, not int. - * src/state.c (state_compare): Likewise. - * src/symtab.c (symbol_check_defined, - symbol_check_alias_consistency, symbol_pack, symbol_translation, - hash_compare_symbol, hash_symbol): - Likewise. - * src/uniqstr.c (uniqstr_print): Likewise. - * src/muscle_tab.c (muscle_m4_output_processor): - New function, to avoid casts. - * src/state.c (state_comparator, stage_hasher): Likewise. - * src/symtab.c (symbol_check_defined_processor, - symbol_check_alias_consistency_processor, symbol_pack_processor, - symbol_translation_processor, hash_symbol_comparator, - hash_symbol_hasher): Likewise. - * src/uniqstr.c (uniqstr_print_processor): Likewise. - * src/muscle_tab.c (muscles_m4_output): - Use new functions instead of casting old functions unportably. - * src/state.c (state_hash_new): Likewise. - * src/symtab.c (symbols_new, symbols_do, symbols_check_defined, - symbols_token_translations_init): - Likewise. - * src/uniqstr.c (uniqstrs_new, hash_initialize, uniqstrs_do): Likewise. - - * src/output.c (GENERATE_MUSCLE_INSERT_TABLE): Use long local - var instead of casting to long, to avoid casts. - (prepare_states): Use MALLOC rather than alloca, so that we don't - have to worry about alloca. - * src/state.c (state_hash_lookup): Likewise. - - * src/scan-gram.l (<SC_ESCAPED_CHARACTER>"'"): Use unsigned char - local var instead of casting to unsigned char, to avoid casts. - - * src/state.c (TRANSITIONS_ALLOC, ERRS_ALLOC, REDUCTIONS_ALLOC, - STATE_ALLOC): Remove. - (transitions_new, errs_new, reductions_new, state_new): Use malloc - rather than calloc, and use offsetof to avoid allocating slightly - too much storage. - (state_new): Initialize all members. - - * src/state.c (state_hash): Use unsigned accumulator, not signed. - - * src/symtab.c (symbol_free): Remove; unused. - (symbol_get): Remove cast in lhs of assignment. - (symbols_do): Now static. Accept generic arguments, not - hashing-related ones. - - * src/symtab.h: (NUMBER_UNDEFINED): Remove unnecessary cast. - (symbol_processor): Remove. - (symbols_do): Remove decl; now static. - - * src/system.h (alloca): Remove; decl no longer needed. - (<stddef.h>): Include, for offsetof. - (<inttypes.>, <stdint.h>): Include if available. - (uintptr_t): New type, if system lacks it. - (CALLOC, MALLOC, REALLOC): New macros. - All uses of XCALLOC, XMALLOC, and XREALLOC changed to use these - new macros. - - * src/tables.c (table_size): Now int, to pacify GCC. - (table_grow, table_ninf_remap): Use signed table size. - (save_row): Don't bother initializing locals when not needed. - (default_goto, goto_actions, pack_vector): Remove unnecessary casts. - * src/uniqstr.c (hash_compare_uniqstr): Likewise. - - * src/vcg.h: Correct misspellings. - - * src/vcg_defaults.h (G_CMAX): Now INT_MAX. - - - * src/getargs.c (getargs): Don't assume EOF == -1. - -2002-12-09 Paul Eggert <eggert@twinsun.com> - - Change identifier spellings to avoid collisions with names - that are reserved by POSIX. - - Don't use names ending in _t, since POSIX reserves them. - For consistency, remove _e and _s endings -- they're weren't - needed to remove ambiguity. All uses changed. - * src/uniqstr.h (uniqstr): Renamed from uniqstr_t, which in - turn was just renamed from struniq_t. - * src/uniqstr.c (uniqstr_processor): Renamed from struniq_processor, - which in turn was just renamed from struniq_processor_t. - (hash_compare_uniqstr): Renamed from hash_compare_struniq, which - in turn was renamed from hash_compare_struniq_t. - * src/LR0.c (struct state_list): Renamed from struct state_list_s. - (state_list): Renamed from state_list_t. - * src/assoc.h (assoc): Renamed from assoc_t. - * src/conflicts.c (enum conflict_resolution): Renamed from - enum conflict_resolution_e. - * src/derives.c (struct rule_list): Renamed from struct rule_list_s. - (rule_list): Renamed from rule_list_t. - * src/getargs.h (enum trace): Renamed from enum trace_e. - (enum report): Renamed from enum report_e. - * src/gram.h (item_number): Renamed from item_number_t. - (rule_number): Renamed from rule_number_t. - (struct rule_s): Remove the "rule_s" part; not used. - (rule): Renamed from rule_t. - (rule_filter): Renamed from rule_filter_t. - * src/lalr.c (struct goto_list): Renamed from struct goto_list_s. - (goto_list): Renamed from goto_list_t. - * src/lalr.h (goto_number): Renamed from goto_number_t. - * src/location.h (location): Renamed from location_t. - * src/muscle_tab.c (muscle_entry): Renamed from muscle_entry_t, - and moved here from: - * src/muscle_tab.h (muscle_entry_t): here. - * src/nullable.c (struct rule_list): Renamed from struct rule_list_s. - (rule_list): Renamed from rule_list_t. - * src/print_graph.c (static_graph): Renamed from graph. - * src/reader.h (braced_code): Renamed from braced_code_t. - Remove brace_code_e tag. - * src/relation.h (relation_node): Renamed from relation_node_t. - (relation_nodes): Renamed from relation_nodes_t. - (relation): Renamed from relation_t. - * src/state.h (state_number): Renamed from state_number_t. - (struct state): Renamed from struct state_s. - (state): Renamed from state_t. - (transitions): Renamed from transitions_t. Unused (and - misspelled) transtion_s tag removed. - (errs): Renamed from errs_t. Unused errs_s tag removed. - (reductions): Renamed from reductions_t. Unused tag - reductions_s removed. - * src/symlist.h (symbol_list): Renamed from symbol_list_t. - (struct symbol_list): Renamed from struct symbol_list_s. - * src/symtab.h (symbol_number): Renamed from symbol_number_t. - (struct symbol): Renamed from struct symbol_s. - (symbol): Renamed from symbol_t. - * src/tables.c (vector_number): Renamed from vector_number_t. - (action_number): Renamed from action_t. - * src/tables.h (base_number): Renamed from base_t. - * src/vcg.h (enum color): Renamed from enum color_e. - (enum textmode): Renamed from enum textmode_e. - (enum shape): Renamed from enum shape_e. - (struct colorentry): Renamed from struct colorentry_s. - (struct classname): Renamed from struct classname_s. - (struct infoname): Renamed from struct infoname_s. - (enum layoutalgorithm): Renamed from enum layoutalgorithm_e. - (enum decision): Renamed from enum decision_e. - (enum orientation): Renamed from enum orientation_e. - (enum alignment): Renamed from enum alignment_e. - (enum arrow_mode): Renamed from enum arrow_mode_e. - (enum crossing_type): Renamed from enum crossing_type_e. - (enum view): Renamed from enum view_e. - (struct node): Renamed from struct node_s. - (node): Renamed from node_t. - (enum linestyle): Renamed from enum linestyle_e. - (enum arrowstyle): Renamed from enum arrowstyle_e. - (struct edge): Renamed from struct edge. - (edge): Renamed from edge_t. - (struct graph): Renamed from struct graph_s. - (graph): Renamed from graph_t. - * tests/calc.at (_AT_DATA_CALC_Y, Simple LALR Calculator): - Rename value_t -> value. - * tests/input.at (Torturing the Scanner): Rename value_t -> value, - value_t_as_yystype -> value_as_yystype. - - Don't include <errno.h> in the mainstream code, since it - reserves E[A-Z0-9]* and we want to use symbols like 'EQUALS'. - * lib/get-errno.c, lib/get-errno.h: New files. - * lib/Makefile.am (libbison_a_SOURCES): Add get-errno.h, - get-errno.c. - * src/files.c (xfopen, xfclose): Use get_errno instead of errno. - * src/output.c (output_skeleton): Likewise. - * src/scan-gram.l (<INITIAL>{int}): Use set_errno and get_errno - instead of errno. - (<SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER>\\x[0-9abcdefABCDEF]+): - Likewise. - (handle_action_dollar, handle_action_at): Likewise. - * src/system.h: Do not include <errno.h>. - (TAB_EXT): Renamed from EXT_TAB. - (OUTPUT_EXT): Renamed from EXT_OUTPUT. - - Avoid str[a-z]*, since <string.h> reserves that name space. - Change all instances of "struniq" in names to "uniqstr", and - likewise for "STRUNIQ" and "UNIQSTR". - * src/uniqstr.c: Renamed from src/struniq.c. - * src/uniqstr.h: Renamed from src/struniq.h. - * src/Makefile.am (bison_SOURCES): Adjust to these renamings. - * src/files.c (strsuffix): Remove; unused. - (concat2): Renamed from stringappend. Now static. - * src/files.h (strsuffix, stringappend): Remove; unused. - * src/parse-gram.y (<chars>): Renamed from <string>. - (<uniqstr>): Renamed from <struniq>. - * src/scan-gram.l (obstack_for_string): Renamed from string_obstack. - * src/vcg.h (struct node_s.expand): Renamed from struct node_s.stretch. - (struct graph_s.expand): Renamed from struct graph_s.stretch. - * src/vcg_defaults.h (G_EXPAND): Renamed from G_STRETCH. - (G_LONG_STRAIGHT_PHASE): Renamed from G_STRAIGHT_PHASE. - (N_EXPAND): Renamed from N_STRETCH. - - Avoid *_MAX and *_MIN, since <limits.h> reserves that name space. - * data/yacc.c (YYSTACK_GAP_MAXIMUM): Renamed from YYSTACK_GAP_MAX. - * src/gram.h (ITEM_NUMBER_MAX, ITEM_NUMBER_MIN, RULE_NUMBER_MAX): - Remove; unused. - * src/lalr.h (GOTO_NUMBER_MAXIMUM): Renamed from GOTO_NUMBER_MAX. - * src/state.h (STATE_NUMBER_MAXIMUM): Renamed from STATE_NUMBER_MAX. - * src/symtab.h (SYMBOL_NUMBER_MAXIMUM): Renamed from SYMBOL_NUMBER_MAX. - * src/tables.c (VECTOR_NUMBER_MAX, VECTOR_NUMBER_MIN): Remove; unused. - (BASE_MAXIMUM): Renamed from BASE_MAX. - (BASE_MINIMUM): Renamed from BASE_MIN. - (ACTION_MAX): Remove; unused. - (ACTION_NUMBER_MINIMUM): Renamed from ACTION_MIN. - Unnecessary casts removed from above defines. - - - Fix misspelling in names. - * src/vcg.h (enum_alignment_e): Renamed from enum_alignement_e. - * src/vcg_defaults.h (G_NODE_ALIGNMENT): Renamed from - G_NODE_ALIGNEMENT. - - - * lib/timevar.c (timevar_report): Renamed from time_report, - for consistency with other names. - * lib/timevar.h (timevar_report): New decl. - * src/system.h (time_report): Remove; decl is now in lib/timevar.h. - - - Sort include-file uses. - - Reorder all include files under src to be in the order "system.h". - then the ../lib include files in angle brackets (alphabetized), - then the . include files in double-quotes (alphabetized). Fix - dependency breakages encountered in this process, as follows: - * src/closure.h, src/derives.h, src/state.h: Include "gram.h". - * src/complain.c: Don't include stdlib.h, string.h _LIBC stuff. - * src/state.h: Include "symtab.h". - -2002-12-08 Paul Eggert <eggert@twinsun.com> - - * data/glr.c, data/lalr1.cc, data/yacc.c: Do not use __file__, - since this causes problems when __file__ contains character - sequences like "@" that are treated specially by src/scan-skel.l. - Instead, just use the file's basename. This fixes the bug - reported by Martin Mokrejs in - <http://lists.gnu.org/archive/html/bug-bison/2002-12/msg00007.html>. - -2002-12-06 Paul Eggert <eggert@twinsun.com> - - Add support for rules that do not have trailing semicolons, as - POSIX requires. Improve the quality of locations in Bison - diagnostics. - - * src/location.c: Include <quotearg.h>. - (empty_location): Now const. - (location_print): New function. Follow the recommendation of the - GNU Coding Standards for locations that span file boundaries. - * src/location.h: Do not include <quotearg.h>; no longer needed. - (boundary): New type. - (location_t): Use it. This allows locations to span file boundaries. - All member uses changed: file -> start.file or end.file (as needed), - first_line -> start.line, first_column -> start.column, - last_line -> end.line, last_column -> end.column. - (equal_boundaries): New function. - (LOCATION_RESET, LOCATION_STEP): Remove. - (LOCATION_PRINT): Remove. All callers changed to use location_print. - (empty_location): Now const. - (location_print): New decl. - * src/parse-gram.y (lloc_default): New function, which handles - empty locations more accurately. - (YYLLOC_DEFAULT): Use it. - (%token COLON): Remove. - (%token ID_COLON): New token. - (rules): Use it. - (declarations, rules): Remove trailing semicolon. - (declaration, rules_or_grammar_declaration): - Allow empty (";") declaration. - (symbol_def): Remove empty actions; no longer needed. - (rules_or_grammar_declaration): Remove trailing semicolon. - (semi_colon.opt): Remove. - * src/reader.h: Include location.h. - (scanner_cursor): New decl. - * src/reduce.c (nonterminals_reduce): Use warn_at rather than - rolling our own. - * src/scan-gram.l (YY_USER_INIT): Initialize scanner_cursor instead - of *loc. - (STEP): Remove. No longer needed, now that adjust_location does - the work. All uses removed. - (scanner_cursor): New var. - (adjust_location): Renamed from extend_location. It now sets - *loc and adjusts the scanner cursor. All uses changed. - Don't bother testing for CR. - (handle_syncline): Remove location arg; now updates scanner cursor. - All callers changed. - (unexpected_end_of_file): Now accepts start boundary of token or - comment, not location. All callers changed. Update scanner cursor, - not the location. - (SC_AFTER_IDENTIFIER): New state. - (context_state): Renamed from c_context. All uses changed. - (id_loc, code_start, token_start): New local vars. - (<INITIAL,SC_AFTER_IDENTIFIER>): New initial context. Move all - processing of Yacc white space and equivalents here. - (<INITIAL>{id}): Save id_loc. Begin state SC_AFTER_IDENTIFIER - instead of returning ID immediately, since we need to search for - a subsequent colon. - (<INITIAL>"'", "\""): Save token_start. - (<INITIAL>"%{", "{", "%%"): Save code_start. - (<SC_AFTER_IDENTIFIER>): New state, looking for a colon. - (<SC_YACC_COMMENT>, <SC_COMMENT>, <SC_LINE_COMMENT>): - BEGIN context_state at end, not INITIAL. - (<SC_ESCAPED_STRING>"\"", <SC_ESCAPED_CHARACTER>"'", - <SC_BRACED_CODE>"}", <SC_PROLOGUE>"%}", <SC_EPILOGUE><<EOF>>): - Return correct token start. - (<SC_BRACED_CODE,SC_PROLOGUE,SC_EPILOGUE>): Save start boundary when - the start of a character, string or multiline comment is found. - * tests/conflicts.at (S/R in initial, Defaulted Conflicted - Reduction): Adjust reported locations to match the more-precise - results now expected. - * tests/input.at (Invalid $n, Invalid @n, Type Clashes): Likewise. - * tests/reduce.at (Useless Rules, Reduced Automaton, - Underivable Rules): Likewise. - * tests/regression.at (Invalid inputs): No longer `expecting ";" - or "|"' now that so many other tokens are allowed by the new grammar. - - * src/complain.h (current_file): Remove duplicate decl; - current_file is now owned by files.h. - * src/complain.c, src/scan-gram.l: Include files.h. - -2002-12-06 Paul Eggert <eggert@twinsun.com> - - * data/glr.c (yy_reduce_print): Don't assume that yyrline[yyrule] - promotes to int; it might be unsigned int. - * data/yacc.c (yy_reduce_print): Likewise. - - * doc/bison.texinfo (Table of Symbols): YYERROR_VERBOSE should - be #defined in the prologue, not in the Bison declarations. - This fixes Debian Bug 102878, reported by Shaul Karl. - -2002-12-02 Paul Eggert <eggert@twinsun.com> - - * configure.ac (AC_REPLACE_FUNCS): Add strtoul. - * lib/strtoul.c: New file, from gnulib. - This fixes a porting bug reported by Peter Klein in - <http://lists.gnu.org/archive/html/bug-bison/2002-12/msg00000.html>. - -2002-11-30 Paul Eggert <eggert@twinsun.com> - - * src/scan-gram.l (no_cr_read, extend_location): Move to epilogue, - and put only a forward declaration in the prologue. This is for - consistency with the other scanner helper functions. - - Type clashes now generate warnings, not errors, since it - appears that POSIX may allow some grammars with type clashes. - * src/reader.c (grammar_current_rule_check): Warn about - type clashes instead of complaining. - * tests/input.at (Type Clashes): Expect warnings, not complaints. - - Add Yacc library, since POSIX requires it. - * doc/bison.texinfo (Yacc Library): New node. Regenerate top menu. - * lib/Makefile.am (lib_LIBRARIES, liby_a_SOURCES): New macros. - * lib/main.c, lib/yyerror.c: New files. - - gram_error can be static; it need not be extern. - * src/reader.h (gram_error): Remove decl. - * src/parse-gram.y (gram_error): Now static. Add static decl. - (print_token_value): Omit parameter names from forward decl, - for consistency. - -2002-11-29 Paul Eggert <eggert@twinsun.com> - - * doc/bison.texinfo: Emphasize that yylex and yyerror must - be declared before being used. E.g., one should typically - declare them in the prologue. Use GNU coding style in examples. - Put "const" consistently after the type it modifies. Mention - that C99 supports "inline". Mention that yyerror traditionally - returns "int". - - %parse-param and %lex-param now take just one argument, the - declaration; the argument name is deduced from the declaration. - - * doc/bison.texinfo (Parser Function, Pure Calling, Error - Reporting, Table of Symbols): Document this. - * src/parse-gram.y (add_param): New function. - (COMMA): Remove. - (declaration): Implement new rule for %parse-param and %lex-param. - * src/scan-gram.l: "," now elicits a warning, rather than being - a token; this is more compatible with byacc. - * tests/calc.at (Simple LALR Calculator): Adopt new convention. - -2002-11-27 Paul Eggert <eggert@twinsun.com> - - Rename identifiers to avoid real and potential collisions. - - * data/c.m4 (b4_yysymprint_generate): yyout -> yyoutput, - to avoid collision with lex macro described by Bruce Lilly in - <http://lists.gnu.org/archive/html/bug-bison/2002-11/msg00114.html>. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Likewise. - * doc/bison.texinfo (Prologue, Tracing): yyprint -> print_token_value. - * src/parse-gram.y (print_token_value): Renamed from yyprint. - All uses changed. - (YYPARSE_PARAM, YYLEX_PARAM, yycontrol): Remove. All uses changed. - The name "yycontrol" violates the name space rules, and this stuff - wasn't being used anyway. - (input): Remove action; this stuff wasn't being used. - (gram_error): Rename local variable yylloc -> loc. - * src/reader.h (struct gram_control_s, gram_control_t): Remove. - (YY_DECL): Don't use "yy" at start of local variables. - All uses changed, e.g., yylloc -> loc. - * src/scan-gram.l (STEP): Renamed from YY_STEP. All uses changed. - (STRING_GROW): Renamed from YY_OBS_GROW. All uses changed. - (STRING_FINISH): Renamed from YY_OBS_FINISH. All uses changed. - (STRING_FREE): Renamed from YY_OBS_FREE. All uses changed. - - * src/parse-gram.y (gram_error): loc is now const *. - * src/reader.h (gram_error): Likewise. - -2002-11-24 Paul Eggert <eggert@twinsun.com> - - Version 1.75c. - - * tests/actions.at (Actions after errors): Use an output format - more similar to that of the Printers and Destructors test. - Test the position of the ';' token too. - (Printers and Destructors): Likewise. - (Printers and Destructors: %glr-parser): Remove for now, to avoid - unnecessarily alarming people when the test fails. - - * data/yacc.c (yyerrlab1): Move this label down, so that the - parser does not discard the lookahead token if the user code - invokes YYERROR. This change is required for POSIX conformance. - - * lib/error.c: Sync with gnulib. - -2002-11-22 Paul Eggert <eggert@twinsun.com> - - * lib/quotearg.c, lib/quotearg.h: Sync with gnulib. - * lib/mbswidth.c, lib/mbswidth.h: Likewise. - * lib/xmalloc.c: Likewise. - -2002-11-20 Paul Eggert <eggert@twinsun.com> - - * lib/argmatch.c, lib/argmatch.h: Sync with gnulib. - -2002-11-20 Paul Eggert <eggert@twinsun.com> - - Avoid use of <assert.h>, as the GNU Coding Standards hint that one - should use `if (! x) abort ();' rather than `assert (x);', and - anyway it's one less thing to worry about configuring. - - * data/glr.c, lib/hash.c, src/system.h: Do not include <assert.h>. - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Likewise, - and replace all instances of assert with abort. - * tests/calc.at (_AT_DATA_CALC_Y): Likewise. - * tests/cxx-type.at (_AT_TEST_GLR_CXXTYPES): Likewise. - - * data/glr.c (yydoAction, yyglrReduce, yysplitStack, yyresolveStates, - yyresolveAction, yyprocessOneStack): Use abort rather than assert. - * lib/hash.c (hash_lookup, hash_get_first, hash_get_next, - hash_find_entry, hash_rehash, hash_insert): Likewise. - * src/conflicts.c (resolve_sr_conflict): Likewise. - * src/lalr.c (set_goto_map, map_goto): Likewise. - * src/nullable.c (nullable_compute): Likewise. - * src/output.c (prepare_rules, token_definitions_output): Likewise. - * src/reader.c (packgram, reader): Likewise. - * src/state.c (state_new, state_free, state_transitions_set, - state_reduction_find): Likewise. - * src/symtab.c (symbol_user_token_number_set, symbol_make_alias, - symbol_pack): Likewise. - * src/tables.c (conflict_row, pack_vector): Likewise. - * src/vcg.c (get_color_str, get_textmode_str, get_shape_str, - get_layoutalgorithm_str, get_decision_str, get_orientation_str, - get_node_alignement_str, get_arrow_mode_str, get_crossing_type_str, - get_view_str, get_linestyle_str, get_arrowstyle_str): Likewise. - - * lib/argmatch.h (ARRAY_CARDINALITY): Do not bother to #undef. - (ARGMATCH_CONSTRAINT): New macro. - (ARGMATCH_ASSERT): Use it. - - * src/system.h (verify): New macro. - * src/getargs.c (trace_argmatch, report_argmatch): Use verify - rather than assert. - * src/tables.c (tables_generate): Likewise. - - * src/struniq.c (struniq_assert): Now returns void, and aborts - if the assertion is false. - (struniq_assert_p): Remove. - * src/struniq.h: Likewise. - -2002-11-18 Paul Eggert <eggert@twinsun.com> - - * data/glr.c (yygetLRActions): Replace `yyindex' with - `yytable[yyindex]' to fix typo introduced in my 2002-11-09 patch. - This fixes the regression with Sun ONE Studio 7 cc that I reported in - <http://lists.gnu.org/archive/html/bug-bison/2002-11/msg00077.html>. - -2002-11-18 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Tracing): `yyprint' shouldn't prepend a - space. - From Tim Van Holder. - -2002-11-17 Paul Eggert <eggert@twinsun.com> - - Pacify Sun ONE Studio 7 lint. Also, rename "ParseError" - to "SyntaxError" for consistency with my 2002-11-15 change. - - * data/glr.c (YYDPRINTF, YYDSYMPRINT, YYDSYMPRINTF) [!YYDEBUG]: Do - not define to {}, since this breaks the common use of `YYDPRINTF - ((...));' if a single statement is desired (e.g. before `else'). - Work around GCC warnings by surrounding corresponding calls with - {} if needed. - (yyhasResolvedValue): Remove unused function. - (yymergeOptionSets, yyresolvStack): Use `continue;' for empty - loop body. - (yyreportSyntaxError): Renamed from yyreportParseError. - (yyrecoverSyntaxError): Renamed from yyrecoverParseError. - All uses changed. - * tests/calc.at (_AT_DATA_CALC_Y): Make vars static instead of - extern when possible. Remove unused initializations. - -2002-11-16 Akim Demaille <akim@epita.fr> - - Augment the similarity between GLR and LALR traces. - - * data/yacc.c (yy_stack_print, YY_STACK_PRINT, yy_reduce_print) - (YY_REDUCE_PRINT): New. - (yyparse): Use them. - * data/glr.c (yy_reduce_print): Use YYFPRINTF, no need for - YYDPRINT here. - (yyglrReduce, yyrecoverParseError, yyparse): Don't report the - state reached after the reduction/recovery, since... - (yyparse, yyprocessOneStack): Report the state we are entering in. - -2002-11-16 Akim Demaille <akim@epita.fr> - - * src/getargs.h, src/getargs.c (trace_e, trace_args, trace_types): - Add support for --trace=skeleton. - * src/scan-skel.l: %option debug. - Scan strings of non-@ or \n instead of character by character. - (scan_skel): Handle trace_skeleton. - (QPUTS): New. - (@output_parser_name@, @output_header_name@): ``Restore'' their - support (used to be M4 macros). - * data/yacc.c: Quote larger chunks, a la glr.c. - * data/lalr1.cc: Likewise. - The header guards are no longer available, so use some other - string than `YYLSP_NEEDED'. - -2002-11-16 Akim Demaille <akim@epita.fr> - - Make the ``Printers and Destructors'' test more verbose, taking - `yacc.c''s behavior as (possibly wrong) reference. - - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Use printf - instead of fprint on stdout. - Set and report the last_line of the symbols. - Consistently display values and locations. - -2002-11-16 Paul Eggert <eggert@twinsun.com> - - * data/yacc.c: Avoid over-quoting of __line__ and __file__. - -2002-11-15 Paul Eggert <eggert@twinsun.com> - - * tests/actions.at (Actions after errors): New test case. - - * data/glr.c, data/lalr1.cc, data/yacc.cc, doc/bison.texinfo, - src/conflicts.c, src/parse-gram.y, src/tables.c, src/tables.h, - tests/action.at, tests/calc.at, tests/conflicts.at, - tests/cxx-type.at, tests/regression.at: - "parse error" -> "syntax error" for POSIX compatibility. - "parsing stack overflow..." -> "parser stack overflow" so - that code matches Bison documentation. - -2002-11-15 Akim Demaille <akim@epita.fr> - - * src/parse-gram.y (declaration): Have %parse-param and %lex-param - take two BRACED_CODE, not two string_content. - Free the scanner's obstack when we are done. - (code_content): New. - * tests/calc.at: Adjust. - * doc/bison.texinfo: Adjust. - Also, make sure to include the `,' for these declarations. - -2002-11-15 Tim Van Holder <tim.van.holder@pandora.be> - - * m4/prereq.m4: Removed the commented jm_PREREQ_HASH - definition; avoids potential autoreconf problems. - -2002-11-15 Akim Demaille <akim@epita.fr> - - Always check the value returned by yyparse. - - * tests/calc.at (_AT_DATA_CALC_Y): Have `main' exit with the value - returned by yyparse. - (_AT_CHECK_CALC_ERROR): Take the expected exit value as argument. - Adjust calls. - * tests/glr-regr1.at (glr-regr1.y): Have `main' exit with the value - returned by yyparse. - -2002-11-14 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * data/glr.c (yyFail): Always set yyerrflag. Corrects regression - on input.at test. - -2002-11-14 Paul Eggert <eggert@twinsun.com> - - * src/output.c (output_skeleton): Call xfopen instead of - duplicating xfopen's body. - - Fix bugs reported by Nelson H. F. Beebe in - <http://lists.gnu.org/archive/html/bug-bison/2002-11/msg00078.html>. - - * tests/headers.at (AT_TEST_CPP_GUARD_H): Don't assume that - "$CC -E foo.h" is allowed, as this doesn't work with the Portland - Group compiler. Instead, use "$CC -E bar.c". Include the .h - file twice in the grammar, as an extra check. - - * tests/input.at (Torturing the Scanner): Surround the - backslash-newline tests with "#if 0", to make it less likely that - we'll run into compiler bugs. Bring back solitary \ inside - comment, but add a closing comment to work around HP C bug. Don't - test backslash-newline in C character constant. - -2002-11-14 Akim Demaille <akim@epita.fr> - - * tests/synclines.at (AT_SYNCLINES_COMPILE): Ignore the exit - status of the compiler. - Calling `exit 1' is no longer needed. - Reported by Nelson H. F. Beebe. - -2002-11-14 Akim Demaille <akim@epita.fr> - - * tests/atlocal.in (CPPFLAGS): We have config.h. - * tests/testsuite.at (AT_DATA_GRAMMAR_PROLOGUE, AT_DATA_GRAMMAR): - New. - * tests/actions.at, tests/calc.at, tests/conflicts.at, - * tests/cxx-type.at, tests/glr-regr1.at, tests/headers.at, - * tests/regression.at, tests/torture.at: Use them for all the - grammars that are to be compiled. - * tests/cxx-type.at (_AT_TEST_GLR_CALC): Rename as... - * tests/cxx-type.at (_AT_TEST_GLR_CXXTYPES): this. - * doc/bison.texinfo (GLR Parsers): Document `inline'. - -2002-11-14 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo: Various formatting changes (alignments in - samples, additional @group/@end group, GCS in samples. - Use @deffn instead of simple @table to define the directives, - macros, variables etc. - -2002-11-13 Paul Eggert <eggert@twinsun.com> - - Fix some bugs reported by Albert Chin-A-Young in - <http://lists.gnu.org/archive/html/bug-bison/2002-11/msg00066.html>. - - * tests/input.at (Torturing the Scanner): Don't invoke "cc a.c b.c - -o c"; the HP C compiler chatters during compilation. - Instead, invoke "cc -c a.c -o a.o; cc -c b.c -o b.o; cc a.o b.o -o c". - * tests/headers.at (export YYLTYPE): Likewise. - - * tests/input.at (Torturing the Scanner): Remove lines containing - solitary backslashes, as they tickle a bug in the HP C compiler. - - * tests/glr-regr1.at (Badly Collapsed GLR States): Avoid // - comments, since they're not portable. Use GNU coding style. - -2002-11-13 Akim Demaille <akim@epita.fr> - - * data/yacc.c: Leave bigger chunks of quoted text. - (YYDSYMPRINTF): New. - Use it to report symbol activities. - * data/glr.c (YYDSYMPRINTF): New. - Use it. - -2002-11-12 Paul Eggert <eggert@twinsun.com> - - Version 1.75b. - - * data/glr.c (yydoAction): Return YYRESULTTAG, not int. - (yyglrReduce): Return yyok, not 0. - This should avoid the enumerated-type warnings reported - by Nelson H. F. Beebe in - <http://lists.gnu.org/archive/html/bug-bison/2002-11/msg00057.html>. - - * lib/bbitset.h (BITSET_INLINE): Remove. - * lib/bitset.h [! BITSET_INLINE]: Remove. - (bitset_set, bitset_reset, bitset_test): Rename local vars - to avoid shadowing warnings by GCC. - - * data/glr.c (inline): Remove #define. It's the user's - responsibility to #define it away, just like 'const'. - This fixes one of the bugs reported by Nelson H. F. Beebe in - <http://lists.gnu.org/archive/html/bug-bison/2002-11/msg00058.html>. - - * Makefile.maint (po-check): Scan .l and .y files instead of the - .c and the .h files that they generate. This fixes the bug - reported by Tim Van Holder in: - <http://lists.gnu.org/archive/html/bison-patches/2002-11/msg00062.html> - Look for N_ as well as for _. Try to avoid matching #define for - N_ and _. - * po/POTFILES.in: Remove src/parse-gram.c, src/scan-gram.c, - src/system.h. Add src/parse-gram.y, src/scan-gram.l. - * src/scan-gram.l: Revamp regular expressions so that " and ' - do not confuse xgettext. - - * src/struniq.h (struniq_new): Do not declare the return type - to be 'const'; this violates the C standard. - * src/struniq.c (struniq_new): Likewise. - -2002-11-12 Albert Chin-A-Young <china@thewrittenword.com> - - * src/Makefile.am (LDADD): Link $(LIBINTL) last to avoid the - duplicate definition of optind on Tru64 UNIX 4.0D with the Compaq - linker. - -2002-11-12 Akim Demaille <akim@epita.fr> - - * Makefile.maint: Sync with Autoconf: - (local_updates): New. - -2002-11-12 Akim Demaille <akim@epita.fr> - - * po/POTFILES.in (src/lalr.c, src/state.c): Remove - -2002-11-12 Akim Demaille <akim@epita.fr> - - * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Display the - locations. - -2002-11-12 Akim Demaille <akim@epita.fr> - - * data/c.m4 (b4_yysymprint_generate): Pass *yyvaluep to YYPRINT, - not yyvalue. - -2002-11-12 Akim Demaille <akim@epita.fr> - - * tests/actions.at (AT_CHECK_PRINTER_AND_DESTRUCTOR): New. - Use it to test the GLR parser. - -2002-11-12 Akim Demaille <akim@epita.fr> - - * tests/regression.at (input.y): s/YYEOF/MYEOF/, as the skeleton - defines it. - * data/glr.c (yystos): New. - (b4_yysymprint_generate, b4_yydestruct_generate): Invoke. - (YYDSYMPRINT): New. - (yyval): Don't define it, it is handled via M4. - (yyrecoverParseError): Free verbosely the discarded symbols. - * data/yacc.c (yysymprint): Remove, rather... - (b4_yysymprint_generate): invoke. - * data/c.m4 (b4_yysymprint_generate): New. - Accept pointers as arguments, as opposed to the version from - yacc.c. - (b4_yydestruct_generate): Likewise. - * tests/cations.at (Printers and Destructors): Use Bison directives - instead of CPP macros. - Don't rely on internal details. - -2002-11-12 Akim Demaille <akim@epita.fr> - - * data/c.m4 (b4_yydestruct_generate, b4_symbol_actions): New. - * data/yacc.c: Rename yychar1 as yytoken, as in glr.c. - Don't work on yychar (i.e., do set it to YYEMPTY, don't match - it against YYEMPTY and so forth), work on yytoken (i.e., set - it to YYEMPTY etc.). - (yydestruct): Replace with a b4_yydestruct_generate invocation. - (b4_symbol_actions): Remove. - * data/glr.c (YYTRANSLATE): As for yacc.c, if negative, it stands - for 0, end-of-input. - -2002-11-12 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Destructor Decl): New. - -2002-11-12 Akim Demaille <akim@epita.fr> - - * src/tables.c (tables_generate): Use free for pointers that - cannot be NULL, not XFREE. - (pack_vector): Use assert, not fatal, for bound violations. - * src/state.c (state_new): Likewise. - * src/reader.c (reader): Likewise. - * src/lalr.c (set_goto_map): Likewise. - * src/location.h (LOCATION_PRINT): If first_line is 0, just issue - the file name. - -2002-11-12 Akim Demaille <akim@epita.fr> - - * src/scan-gram.l, src/reader.h (scanner_last_string_free): - Restore. - * src/scan-gram.l (last_string): Is global to the file, not to - yylex. - * src/parse-gram.y (input): Don't append the epilogue here, - (epilogue.opt): do it here, and free the scanner's obstack. - * src/reader.c (epilogue_set): Rename as... - (epilogue_augment): this. - * data/c.m4 (b4_epilogue): Defaults to empty. - -2002-11-12 Akim Demaille <akim@epita.fr> - - * src/getargs.c (long_options): Remove duplicates. - * src/vmsgetargs.c, src/build.com, src/bison.cld, src/vmshlp.mar: - Remove. - * doc/bison.rnh: Remove. - * doc/bison.texinfo (VMS Invocation): Remove. - -2002-11-12 Akim Demaille <akim@epita.fr> - - * src/struniq.h, src/struniq.c (struniq_t): Is const. - (STRUNIQ_EQ, struniq_assert, struniq_assert_p): New. - - Use struniq for symbols. - - * src/symtab.h (symbol_t): The tag member is a struniq. - (symbol_type_set): Adjust. - * src/symtab.c (symbol_new): Takes a struniq. - (symbol_free): Don't free the tag member. - (hash_compare_symbol_t, hash_symbol_t): Rename as... - (hash_compare_symbol, hash_symbol): these. - Use the fact that tags as struniqs. - (symbol_get): Use struniq_new. - * src/symlist.h, src/symlist.c (symbol_list_n_type_name_get): - Returns a strniq. - * src/reader.h (merger_list, grammar_currentmerge_set): The name - and type members are struniqs. - * src/reader.c (get_merge_function) - (grammar_current_rule_merge_set): Adjust. - (TYPE, current_type): Are struniq. - - Use struniq for file names. - - * src/files.h, src/files.c (infile): Split into... - (grammar_file, current_file): these. - * src/scan-gram.c (YY_USER_INIT, handle_syncline): Adjust. - * src/reduce.c (reduce_print): Likewise. - * src/getargs.c (getargs): Likewise. - * src/complain.h, src/complain.c: Likewise. - * src/main.c (main): Call struniqs_new early enough to use it for - file names. - Don't free the input file name. - -2002-11-12 Akim Demaille <akim@epita.fr> - - * src/symtab.c (symbol_free): Remove dead deactivated code: - type_name are properly removed. - Don't use XFREE to free items that cannot be NULL. - * src/struniq.h, src/struniq.c: New. - * src/main.c (main): Initialize/free struniqs. - * src/parse-gram.y (%union): Add astruniq member. - (yyprint): Adjust. - * src/scan-gram.l (<{tag}>): Return a struniq. - Free the obstack bit that used to store it. - * src/symtab.h (symbol_t): The 'type_name' member is a struniq. - -2002-11-11 Paul Eggert <eggert@twinsun.com> - - Revamp to fix many (but not all) of the C- and M4-related quoting - problems. Among other things, this fixes the Bison bug reported - by Jan Hubicka when processing the Bash grammar; see: - <http://lists.gnu.org/archive/html/bison-patches/2002-11/msg00039.html> - - Use new @ escapes consistently. Represent brackets with @{ and @} - rather than @<:@ and @:>@, since this works a bit better with dumb - editors like vi. Represent @ with @@, since @ is now consistently - an escape. Use @oline@ and @ofile@ rather than __oline__ and - __ofile__, to avoid unexpected expansions. Similarly, use @output - rather than #output. - - * data/c.m4 (b4_copyright): Omit file name from comment, since - the file name could contain "*/". - (b4_synclines_flag): Don't quote the 2nd argument; it should already - be quoted. All uses changed. - - * data/glr.c: Use new @ escapes consistently. - (b4_input_suffix, b4_output_parser_suffix, b4_output_parser_name, - b4_output_header_suffix, b4_output_header_name, b4_header_guard): - Remove, since they couldn't handle arbitrary characters in file - names. - * data/lalr1.cc: Likewise. - * data/yacc.c: Likewise. - - * src/files.c (output_infix): Remove; all uses removed. - * src/files.h: Likewise. - - * data/glr.c: Remove use of "#ifdef b4_header_guard", since it - mishandled funny characters in file names, and anyway it isn't - needed any more. - * data/yacc.c: Likewise. - * data/lalr1.cc: Use YYSLP_NEEDED instead of b4_header_guard. - - * data/glr.c (YYSTYPE_IS_TRIVIAL): Define when the .h file would. - * data/yacc.c: Likewise. - - * src/muscle_tab.c: Include quotearg.h, since we need to quote C - strings now. - (muscle_init): Quote filename as a C string. - * src/muscle_tab.h (MUSCLE_GROW_STRING_PAIR): Remove; unused. - (MUSCLE_OBSTACK_SGROW, MUSCLE_INSERT_C_STRING): New macros. - * src/output.c (escaped_file_name_output): New function. - (prepare_symbols): Quote tokens for M4. - (prepare): Don't insert output_infix, output_prefix, - output_parser_name, output_header_name; this is now down by scan-skel. - Insert skeleton as a C string. - - * src/output.c (user_actions_output, symbol_destructors_output, - symbol_printers_output): Quote filenames for C and M4. - * src/reader.c (prologue_augment, epilogue_set): Likewise. - - * src/scan-gram.l (<SC_CHARACTER>): Don't worry about any backslash - escapes other than \\ and \'; this simplifies the code. - (<SC_STRING>): Likewise, for \\ and \". - (<SC_COMMENT,SC_LINE_COMMENT,SC_STRING,SC_CHARACTER,SC_BRACED_CODE, - SC_PROLOGUE,SC_EPILOGUE>): Escape $ and @, too. - Use new escapes @{ and @} for [ and ]. - - * src/scan-skel.l (yylineno, yyoutname): Remove static vars, replacing - them with auto vars. - Switch to new escape scheme, where @ is the escape character uniformly. - Abort if a stray escape character is found. Avoid unbounded input - buffer when parsing non-escaped text. - - * tests/input.at (Torturing the Scanner): Add tests that @oline@, - __oline__, #output, $@, and @{ do not have unintended meanings. - -2002-11-09 Paul Eggert <eggert@twinsun.com> - - Fix the test failure due to GCC warnings described in - <http://lists.gnu.org/archive/html/bug-bison/2002-11/msg00000.html>. - * data/glr.c (yyis_pact_ninf, yyis_table_ninf): New macros, which - evaluate to 0 if it's impossible for NINF to be in the respective - table. - (yygetLRActions, yyrecoverParseError): Use them. - - * src/scan-gram.l (unexpected_end_of_file): Fix bug: columns were - counted in the token inserted at end of file. Now takes - location_t *, not location_t, so that the location can be - adjusted. All uses changed. - - * tests/regression.at (Invalid inputs): Adjust wording in - diagnostic to match the new behavior. - - * tests/torture.at (AT_DATA_TRIANGULAR_GRAMMAR, - AT_DATA_HORIZONTAL_GRAMMAR, AT_DATA_LOOKAHEADS_GRAMMAR, - AT_DATA_STACK_TORTURE): Replace `assert (x);' with `if (! (x)) - abort ();'. This reduces the runtime of the "Many lookaheads" - test from 27.6 to 2.7 minutes on a 440 MHz Ultrasparc III running - GCC 3.2. - -2002-11-07 Paul Eggert <eggert@twinsun.com> - - * src/parse-gram.y (CHARACTER): Remove unused token. - All uses removed. - - * src/scan-gram.l: Remove stack option. We no longer use the - stack, since the stack was never deeper than 1; instead, use the - new auto var c_context to record the stacked value. - - Remove nounput option. At an unexpected end of file, we now unput - the minimal input necessary to end cleanly; this simplifies the - code. - - Avoid unbounded token sizes where this is easy. - - (unexpected_end_of_file): New function. - Use it to systematize the error message on unexpected EOF. - (last-string): Now auto, not static. - (YY_OBS_FREE): Remove unnecessary do while (0) wrapper. - (scanner_last_string_free): Remove; not used. - (percent_percent_count): Move decl to just before use. - (SC_ESCAPED_CHARACTER): Return ID at unexpected end of file, - not the (never otherwised-used) CHARACTER. - -2002-11-07 Akim Demaille <akim@epita.fr> - - Let yyerror always receive the msg as last argument, so that - yyerror can be variadic. - - * data/yacc.c (b4_yyerror_args): New. - Use it when calling yyerror. - * data/glr.c (b4_yyerror_args, b4_lyyerror_args): New. - Use it when calling yyerror. - * doc/bison.texinfo (Error Reporting): Adjust. - * tests/calc.at (_AT_DATA_CALC_Y): Adjust. - * tests/cxx-type.at (_AT_TEST_GLR_CALC): Adjust. - -2002-11-06 Akim Demaille <akim@epita.fr> - - #line should have quoted strings. - Ideally, this should be done by m4_quotearg. - - * src/scan-skel.l: Include quotearg.h. - Quote __ofile__. - * src/output.c (symbol_printers_output) - (symbol_destructors_output): Quote the file name. - -2002-11-06 Akim Demaille <akim@epita.fr> - - * tests/regression.at (Invalid inputs): Adjust to the recent - messages. - -2002-11-06 Akim Demaille <akim@epita.fr> - - Restore --no-lines. - Reported by Jim Kent. - - * data/c.m4 (b4_syncline): New. - * data/glr.c, data/yacc.c, data/lalr1.cc: Use it. - * src/reader.c (prologue_augment, epilogue_set): Use b4_syncline. - * src/output.c (user_actions_output): Likewise. - (prepare): Define 'b4_synclines_flag'. - * src/muscle_tab.c (muscle_init): Don't define b4_linef. - -2002-11-06 Akim Demaille <akim@epita.fr> - - * src/main.c (main): Free `infile'. - * src/scan-gram.l (handle_syncline): New. - Recognize `#line'. - * src/output.c (user_actions_output, symbol_destructors_output) - (symbol_printers_output): Use the location's file name, not - infile. - * src/reader.c (prologue_augment, epilogue_set): Likewise. - -2002-11-05 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * src/tables.c (matching_state): Don't allow states to match if - either has GLR conflict entries. - -2002-11-05 Paul Eggert <eggert@twinsun.com> - - * src/scan-gram.l: Use more accurate diagnostics, e.g. - "integer out of range" rather than "invalid value". - * tests/input.at (Invalid $n, Invalid @n): Change expected wording - accordingly. - - Scan <% and %> digraphs in C code as POSIX 1003.1-2001 requires. - Also, remove one static variable in the scanner. - - * src/scan-gram.l (braces_level): Now auto, not static. - Initialize to zero if the compiler is being picky. - (INITIAL): Clear braces_level instead of incrementing it. - (SC_BRACED_CODE): Treat <% and %> as { and } when inside C code, - as POSIX 1003.1-2001 requires. - * src/system.h (IF_LINT): New macro, taken from coreutils. - * configure.ac: Define "lint" if --enable-gcc-warnings. - -2002-11-05 Akim Demaille <akim@epita.fr> - - * src/scan-gram.l: When it starts with `%', complain about the - whole directive, not just that `invalid character: %'. - -2002-11-04 Akim Demaille <akim@epita.fr> - - * Makefile.maint: Update from Autoconf. - (update, cvs-update, po-update, do-po-update): New. - -2002-11-04 Akim Demaille <akim@epita.fr> - - * tests/glr-regr1.at (Badly Collapsed GLR States): Prototype yylex - and yyerror. - Have yyerror `use' its arguments. - * tests/calc.at (AT_CHECK_PUSHDEFS): AT_YYERROR_SEES_LOC_IF - returns true when location & yacc & pure & parse-param. - (_AT_DATA_CALC_Y): Let yyerror ``use'' its arguments. - -2002-11-04 Akim Demaille <akim@epita.fr> - - * src/location.h (LOCATION_PRINT): Use quotearg slot 3 to avoid - clashes. - * src/scan-gram.l: Use [\'] instead of ['] to pacify - font-lock-mode. - Use complain_at. - Use quote, not quote_n since LOCATION_PRINT no longer uses the - slot 0. - -2002-11-03 Paul Eggert <eggert@twinsun.com> - - * src/reader.c (get_merge_function, grammar_current_rule_check): - Use consistent diagnostics for reporting type name clashes. - Quote the types with <>, for consistency with Yacc. - * tests/input.at (Type Clashes): Adjust to diagnostic changes. - -2002-11-03 Akim Demaille <akim@epita.fr> - - * data/c.m4 (b4_identification, b4_user_args, b4_parse_param): - New. - * data/yacc.m4 (b4_pure_args, b4_Pure_args): New. - (b4_parse_param): Remove. - Use b4_identification. - Propagate b4_pure_args where needed to pass them to yyerror. - * data/glr.m4 (b4_parse_param): Remove. - (b4_user_formals, b4_pure_args, b4_pure_formals, b4_lpure_args) - (b4_lpure_formals): New. - Use b4_identification. - (YY_USER_FORMALS, YY_USER_ARGS): Remove, replaced by - b4_user_formals and b4_user_args. - (yyexpandGLRStack, yyFail, yyaddDeferredAction, yyglrShiftDefer) - (yyreportAmbiguity): When using a pure parser, also need - the location, and the parse-params. - Adjust callers. - (yyuserAction, yyglrShift, yyreportParseError, yyrecoverParseError): - When using a pure parser, also need the parse-params. - Adjust callers. - * tests/calc.at: Test pure (%pure-parser) and absolutely pure - (%pure-parser + %parse-param) LALR and GLR parsers. - (AT_CHECK_PUSHDEFS, AT_CHECK_POPDEFS): New, define AT_PARAM_IF, - AT_LOCATION_IF, AT_PURE_IF, AT_GLR_IF, AAT_PURE_AND_LOC_IF, - AT_GLR_OR_PARAM_IF, AT_YYERROR_ARG_LOC_IF, AT_YYERROR_SEES_LOC_IF. - (_AT_DATA_CALC_Y): Equip for purity of yyerror. - (_AT_CHECK_CALC_ERROR): Use AT_YYERROR_SEES_LOC_IF. - * tests/cxx-type.at (_AT_TEST_GLR_CALC): Equip for yyerror purity. - * doc/bison.texinfo: Untabify the whole file. - (Parser Function): Document %parse-param, deprecate YYPARSE_PARAM. - (Pure Calling): Document %lex-param, deprecate YYLEX_PARAM. - (Error Reporting): Adjust to these new directives. - Document %error-verbose, deprecate YYERROR_VERBOSE. - -2002-11-03 Akim Demaille <akim@epita.fr> - - * tests/calc.at: Change all the AT_CHECK_CALC_LALR and - AT_CHECK_CALC_GLR invocations to use % directives, instead of - command line options. - * tests/cxx-type.at: Formatting changes. - -2002-11-03 Paul Eggert <eggert@twinsun.com> - - * src/scan-gram.l: Revamp to fix POSIX incompatibilities, - to count columns correctly, and to check for invalid inputs. - - Use mbsnwidth to count columns correctly. Account for tabs, too. - Include mbswidth.h. - (YY_USER_ACTION): Invoke extend_location rather than LOCATION_COLUMNS. - (extend_location): New function. - (YY_LINES): Remove. - - Handle CRLF in C code rather than in Lex code. - (YY_INPUT): New macro. - (no_cr_read): New function. - - Scan UCNs, even though we don't fully handle them yet. - (convert_ucn_to_byte): New function. - - Handle backslash-newline correctly in C code. - (SC_LINE_COMMENT, SC_YACC_COMMENT): New states. - (eols, blanks): Remove. YY_USER_ACTION now counts newlines etc.; - all uses changed. - (tag, splice): New EREs. Do not allow NUL or newline in tags. - Use {splice} wherever C allows backslash-newline. - YY_STEP after space, newline, vertical-tab. - ("/*"): BEGIN SC_YACC_COMMENT, not yy_push_state (SC_COMMENT). - - (letter, id): Don't assume ASCII; e.g., spell out a-z. - - ({int}, handle_action_dollar, handle_action_at): Check for integer - overflow. - - (YY_STEP): Omit trailing semicolon, so that it's more like C. - - (<SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER>): Allow \0 and \00 - as well as \000. Check for UCHAR_MAX, not 255. - Allow \x with an arbitrary positive number of digits, as in C. - Check for overflow here. - Allow \? and UCNs, for compatibility with C. - - (handle_symbol_code_dollar): Use quote_n slot 1 to avoid collision - with quote slot used by complain_at. - - * tests/input.at: Add tests for backslash-newline, m4 quotes - in symbols, long literals, and funny escapes in strings. - - * configure.ac (jm_PREREQ_MBSWIDTH): Add. - * lib/Makefile.am (libbison_a_SOURCES): Add mbswidth.h, mbswidth.c. - * lib/mbswidth.h, lib/mbswidth.c: New files, from GNU gettext. - * m4/Makefile.am (EXTRA_DIST): Add mbswidth.m4. - * m4/mbswidth.m4: New file, from GNU coreutils. - - * doc/bison.texinfo (Grammar Outline): Document // comments. - (Symbols): Document that trigraphs have no special meaning in Bison, - nor is backslash-newline allowed. - (Actions): Document that trigraphs have no special meaning. - - * src/location.h (LOCATION_COLUMNS, LOCATION_LINES): Remove; - no longer used. - -2002-11-02 Paul Eggert <eggert@twinsun.com> - - * src/reader.c: Don't include quote.h; not needed. - (get_merge_function): Reword warning to be consistent with - type clash diagnostic in grammar_current_rule_check. - - * lib/quotearg.c (quotearg_buffer_restyled): Fix off-by-two - bug in trigraph handling. - - * src/output.c (prepare_symbols): When printing token names, - escape "[" as "@<:@" and likewise for "]". - - * src/system.h (errno): Remove declaration, as we are now - assuming C89 or better, and C89 guarantees errno. - -2002-10-30 Paul Eggert <eggert@twinsun.com> - - * lib/bitset_stats.c (bitset_stats_read, bitset_stats_write): - Check for close failures. - * src/files.h (xfclose): Return void, not int, since it always - returned zero. - * src/files.c (xfclose): Likewise. Report I/O error if ferror - indicates one. - * src/output.c (output_skeleton): Use xfclose rather than fclose - and ferror. xfclose now checks ferror. - - * data/glr.c (YYLEFTMOST_STATE): Remove. - (yyreportTree): Use a stack-based leftmost state. This avoids - our continuing battles with bogus warnings about initializers. - -2002-10-30 Akim Demaille <akim@epita.fr> - - * src/system.h: Don't use #ifdef/#ifndef on HAVE_ values, only - #if. - -2002-10-29 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * tests/glr-regr1.at: New test for reported regressions. - * tests/testsuite.at: Add glr-regr1.at test. - * tests/Makefile.am: Add glr-regr1.at test. - -2002-10-24 Paul Eggert <eggert@twinsun.com> - - Version 1.75a. - - * tests/calc.at (_AT_DATA_CALC_Y): Remove unused strcat declaration. - * tests/cxx-type.at (_AT_TEST_GLR_CALC): Include stdlib.h, since - we use malloc. Don't assume 'A' through 'Z' are contiguous. - Don't assume strdup exists; POSIX says its an XSI extension. - Check for buffer overflow on input. - -2002-10-24 Akim Demaille <akim@epita.fr> - - * src/output.c (output_skeleton): Don't disable M4sugar comments - too soon: it results in comments being expanded. - * data/yacc.c, data/glr.c, data/lalr1.cc: Do it right before the - first output. - -2002-10-24 Akim Demaille <akim@epita.fr> - - * data/yacc.c (m4_int_type): New. - * data/c.m4 (m4_int_type): Don't use yysigned_char, but `signed - char' as only yacc.c wants K&R portability. - * data/glr.c (yysigned_char): Remove. - * data/lalr1.cc: Rename the trailing b4_name as b4_parser_class_name. - Reported by Quoc Peyrot. - -2002-10-23 Paul Eggert <eggert@twinsun.com> - - * src/main.c (main): With --trace=time, report times even if a - non-fatal error occurs. Formerly, the times were reported in some - such cases but not in others. - * src/reader.c (reader): Just return if a complaint has been issued, - instead of exiting, so that 'main' can report times. - -2002-10-22 Akim Demaille <akim@epita.fr> - - * src/system.h: Include sys/types. - Reported by Bert Deknuydt. - -2002-10-23 Paul Eggert <eggert@twinsun.com> - - * configure.ac (AC_PROG_LEX): Use instead of AM_PROG_LEX. - Suggested by Art Haas. - -2002-10-22 Paul Eggert <eggert@twinsun.com> - - * src/complain.c (exit) [! (STDC_HEADERS || _LIBC)]: Remove exit - decl; not needed any more. - * src/main.c (main): Use return to exit, undoing yesterday's change. - The last OS that we could find where this wouldn't work is - SunOS 3.5, and that's too old to worry about now. - - * data/glr.c (struct yyltype): Define members even when not - doing locations. This is more consistent with yacc.c, and it - works around the following bug reports: - http://lists.gnu.org/archive/html/bug-bison/2002-10/msg00106.html - http://lists.gnu.org/archive/html/bug-bison/2002-10/msg00111.html - - * doc/bison.texinfo: Minor spelling and typographical fixes. Use - @acronym consistently. Standardize on "Yacc" instead of "YACC", - "Algol" instead of "ALGOL". Give a bit more history about BNF. - -2002-10-22 Akim Demaille <akim@epita.fr> - - * data/README: New. - -2002-10-21 Paul Eggert <eggert@twinsun.com> - - Be consistent about 'bool'; the old code used an enum in one - module and an int in another, and this violates the C standard. - * m4/stdbool.m4: New file, from coreutils 4.5.3. - * configure.ac (AC_HEADER_STDBOOL): Add. - * m4/Makefile.am (EXTRA_DIST): Add stdbool.m4. - * src/muscle_tab.c (hash_compare_muscles): (a ? FALSE : TRUE) -> (! a) - * src/symtab.c (hash_compare_symbol_t): Likewise. - * src/system.h (bool, false, true): Use a definition consistent - with ../lib/hash.c. All uses changed. - - * src/complain.c (warning_issued): Renamed from warn_message_count, - so that we needn't worry about integer overflow (!). - Now of type bool. All uses changed. - (complaint_issued): Renamed from complain_message_count; likewise. - - * src/main.c (main): Use exit to exit with failure. - - * src/complain.c (fatal_at, fatal): Use EXIT_FAILURE and EXIT_SUCCESS - rather than 1 and 0. - * src/main.c (main): Likewise. - * src/getargs.c (getargs): Likewise. - * src/reader.c (reader): Likewise. - - * src/getarg.c (getargs): Remove duplicate code for - "Try `bison --help'". - - * src/files.c (xfopen, xfclose): Use EXIT_FAILURE rather than 2. - What was that "2" for? - - * src/complain.h (fatal, fatal_at): Add __attribute__((__noreturn__)). - * src/getargs.c (usage): Likewise. - - * src/getargs.c (getargs): When there are too few operands, report - the last one. When there are too many, report the first extra - one. This is how diffutils does it. - -2002-10-20 Paul Eggert <eggert@twinsun.com> - - Remove K&R vestiges. - * configure.ac (AC_C_CONST, AM_C_PROTOTYPES): Remove. - * src/complain.c (VA_START): Remove. Assume prototypes. - (vfprintf) [! (HAVE_VPRINTF || defined vfprintf)]: New macro. - (private_strerror, warn_at, warn, complain_at, complain, fatal_at, - fatal): Assume prototypes. - * src/complain.h: Assume prototypes. - * src/system.h (PARAMS): Remove. - Include <limits.h> unconditionally, since it's guaranteeed even - for a freestanding C89 compiler. - (SHRT_MIN, SHRT_MAX): Remove, since C89 guarantees them. - * src/vmsgetargs.c (getargs, cli_present, cli_get_value): Prototype. - -2002-10-20 Akim Demaille <akim@epita.fr> - - * src/muscle_tab.c (muscle_grow): Remove trailing debugging code. - * data/glr.c (YY_USER_FORMALS, YY_USER_ARGS): New. - (yyuserAction, yydoAction, yyglrReduce, yyresolveValue) - (yyresolveStates, yyresolveAction, yyresolveStack) - (yyprocessOneStack): Use them. - (yy_reduce_print): New. - * tests/calc.at (_AT_DATA_CALC_Y): Exercise %parse-param. - -2002-10-20 Akim Demaille <akim@epita.fr> - - * data/c.m4 (b4_c_ansi_args): Recognize functions with no - arguments and output `void'. - (b4_c_function): Rename as... - (b4_c_function_def): this. - (b4_c_function_decl, b4_c_ansi_function_def) - (b4_c_ansi_function_decl): New. - Change the interpretation of the arguments: before `int, foo', now - `int foo, foo'. - * data/yacc.c (yyparse): Prototype and define thanks to these. - Adjust b4_c_function_def uses. - * data/glr.c (yyparse): Likewise, but ANSI only. - -2002-10-20 Akim Demaille <akim@epita.fr> - - * src/output.c (prepare): Move the definition of `tokens_number', - `nterms_number', `undef_token_number', `user_token_number_max' - to... - (prepare_tokens): Here. - (prepare_tokens): Rename as... - (prepare_symbols): this. - (prepare): Move the definition of `rules_number' to... - (prepare_rules): here. - (prepare): Move the definition of `last', `final_state_number', - `states_number' to... - (prepare_states): here. - * data/yacc.c, data/lalr1.cc, data/glr.c: Normalize `>' into `<'. - -2002-10-20 Akim Demaille <akim@epita.fr> - - * src/tables.h, src/tables.c, src/output.c: Comment changes. - -2002-10-20 Akim Demaille <akim@epita.fr> - - * data/yacc.c, data/yacc.c (b4_location_if, b4_pure_if): Move to... - * data/c.m4: here. - -2002-10-20 Akim Demaille <akim@epita.fr> - - * src/output.c (prepare): Use MUSCLE_INSERT_STRING. - * src/muscle_tab.c (muscle_pair_list_grow): Rename `val as - `pair'. - (muscle_init): Move the `b4_ltype', `b4_maxdepth', `b4_initdepth', - `name' to... - * data/glr.c, data/lalr1.cc, data/yacc.c (b4_location_type) - (b4_stack_depth_init, b4_stack_depth_max, b4_parser_class_name): - These. - -2002-10-19 Paul Eggert <eggert@twinsun.com> - - Do not create a temporary file, as that involves security and - cleanup headaches. Instead, use a pair of pipes. - Derived from a suggestion by Florian Krohm. - * lib/subpipe.c, lib/subpipe.h, m4/subpipe.m4: New files. - * lib/mkstemp.c, lib/readpipe.c, lib/tempname.c, m4/mkstemp.m4: Remove. - * configure.ac (UTILS_FUNC_MKSTEMP, jm_PREREQ_TEMPNAME): Remove. - (BISON_PREREQ_SUBPIPE): Add. - * lib/Makefile.am (libbison_a_SOURCES): Remove readpipe.c. - Add subpipe.h, subpipe.c. - * m4/Makefile.am (EXTRA_DIST): Remove mkstemp.m4. Add subpipe.m4. - * po/POTFILES.in: Add lib/subpipe.c. - * src/output.c: Include "subpipe.h". - (m4_invoke): Remove decl. - (scan_skel): New decl. - (output_skeleton): Use pipe rather than temporary file for m4 input. - Check that m4sugar.m4 is readable, to avoid deadlock. - Check for pipe I/O error. - * src/scan-skel.l (readpipe): Remove decl. - (scan_skel): New function, to be used in place of m4_invoke. - Read from stream rather than file. - - * lib/timevar.c (TICKS_TO_MSEC, CLOCKS_TO_MSEC): Do not cast to - float, as this generates a warning on Solaris 8 + GCC 3.2 with - --enable-gcc-warnings. Instead, divide into 1.0 rather than 1; - this generates a more-accurate value anyway. - - * lib/timevar.c (timervar_accumulate): Rename locals to - avoid confusion with similarly-named more-global. - * src/muscle_tab.c (muscle_pair_list_grow): Likewise. - - * src/output.c (prepare): Use xstrdup to convert char const * - to char *, to avoid GCC warning. - -2002-10-19 Akim Demaille <akim@epita.fr> - - * tests/calc.at (_AT_DATA_CALC_Y): Define VAL, LOC, LEX_FORMALS, - LEX_PRE_FORMALS, LEX_ARGS, LEX_PRE_ARGS, USE_LEX_ARGS. - Use them to have `calc.y' ready for %pure-parser. - * data/yacc.c (YYLEX): Pass a yylex return type to - b4_c_function_call. - -2002-10-19 Akim Demaille <akim@epita.fr> - - Prototype support of %lex-param and %parse-param. - - * src/parse-gram.y: Add the definition of the %lex-param and - %parse-param tokens, plus their rules. - Drop the `_' version of %glr-parser. - Add the "," token. - * src/scan-gram.l (INITIAL): Scan them. - * src/muscle_tab.c: Comment changes. - (muscle_insert, muscle_find): Rename `pair' as `probe'. - * src/muscle_tab.h (MUSCLE_INSERT_PREFIX): Remove unused. - (muscle_entry_s): The `value' member is no longer const. - Adjust all dependencies. - * src/muscle_tab.c (muscle_init): Adjust: use - MUSCLE_INSERT_STRING. - Initialize the obstack earlier. - * src/muscle_tab.h, src/muscle_tab.c (muscle_grow) - (muscle_pair_list_grow): New. - * data/c.m4 (b4_c_function_call, b4_c_args): New. - * data/yacc.c (YYLEX): Use b4_c_function_call to honor %lex-param. - * tests/calc.at: Use %locations, not --locations. - (AT_CHECK_CALC_GLR): Use %glr-parser, not %glr_parser. - -2002-10-19 Akim Demaille <akim@epita.fr> - - * src/getargs.c (usage): Take status as argument and exit - accordingly. - Report the traditional `Try ... --help' message when status != 0. - (usage, version): Don't take a FILE * as arg, it is pointless. - (getargs): When there is an incorrect number of arguments, make it - an error, and report it GNUlically thanks to `usage ()'. - -2002-10-18 Paul Eggert <eggert@twinsun.com> - - * data/glr.c (yyreportParseError): Don't assume that sprintf - yields the length of the printed string, as this is not true - on SunOS 4.1.4. Reported by Peter Klein. - - * tests/calc.at (_AT_DATA_CALC_Y): #undef memcmp and realloc. - * tests/conflicts.at (%nonassoc and eof): Likewise. - Fixes SunOS 4.1.4 test failure reported by Peter Klein. - -2002-10-17 Akim Demaille <akim@epita.fr> - - * src/getargs.h (trace_e): Add trace_scan, and trace_parse. - * src/getargs.c (trace_types, trace_args): Adjust. - * src/reader.c (grammar_current_rule_prec_set) - (grammar_current_rule_dprec_set, grammar_current_rule_merge_set): - Standardize error messages. - And s/@prec/%prec/! - (reader): Use trace_flag to enable scanner/parser debugging, - instead of an adhoc scheme. - * src/scan-gram.l: Remove trailing debugging code. - -2002-10-16 Paul Eggert <eggert@twinsun.com> - - * src/muscle_tab.h (MUSCLE_TAB_H_): Was misspelled as - MUSCLE_TAB_H. - - * NEWS: Officially drop support for building Bison with K&R C, - since it didn't work anyway and it's not worth worrying about. - * Makefile.maint (wget_files): Remove ansi2knr.c. - (ansi2knr.c-url_prefix): Remove. - * lib/.cvsignore: Remove ansi2knr, ansi2knr.*. - * lib/Makefile.am (AUTOMAKE_OPTIONS): Remove. - * src/Makefile.am (AUTOMAKE_OPTIONS): Remove. - -2002-10-15 Paul Eggert <eggert@twinsun.com> - - Stop using the "enum_" trick for K&R-style function definitions; - it confused me, and I was the author! Instead, assume that people - who want to use K&R C compilers (when using these modules in GCC, - perhaps?) will run ansi2knr. - - * lib/bbitset.h: (enum_bitset_ops, enum_bitset_type): Remove. - All uses of "enum_" changed to "enum ". - * lib/ebitset.c (enum_ebitset_find_mode): Likewise. - * lib/lbitset.c (enum_lbitset_find_mode): Likewise. - - * lib/abitset.c (abitset_and, abitset_and_cmp, abitset_and_or, - abitset_and_or_cmp, abitset_andn, abitset_andn_cmp, - abitset_andn_or, abitset_andn_or_cmp, abitset_bytes, abitset_copy, - abitset_copy1, abitset_disjoint_p, abitset_empty_p, - abitset_equal_p, abitset_init, abitset_list, abitset_list_reverse, - abitset_not, abitset_ones, abitset_or, abitset_or_and, - abitset_or_and_cmp, abitset_or_cmp, abitset_reset, abitset_set, - abitset_size, abitset_small_list, abitset_subset_p, abitset_test, - abitset_unused_clear, abitset_xor, abitset_xor_cmp, abitset_zero): - Use function prototypes; this removes the need for declaring - static functions simply to provide their prototypes. - * lib/bitset.c (bitset_alloc, bitset_and_or_, bitset_and_or_cmp_, - bitset_andn_or_, bitset_andn_or_cmp_, bitset_bytes, bitset_copy_, - bitset_count_, bitset_create, bitset_dump, bitset_first, - bitset_free, bitset_init, bitset_last, bitset_next, - bitset_obstack_alloc, bitset_obstack_free, bitset_only_set_p, - bitset_op4_cmp, bitset_or_and_, bitset_or_and_cmp_, bitset_prev, - bitset_print, bitset_release_memory, bitset_toggle_, - bitset_type_choose, bitset_type_get, bitset_type_name_get, - debug_bitset): Likewise. - * lib/bitset.h (bitset_set, bitset_reset, bitset_test): Likewise. - * lib/bitset_stats.c (bitset_log_histogram_print, - bitset_percent_histogram_print, bitset_stats_and, - bitset_stats_and_cmp, bitset_stats_and_or, - bitset_stats_and_or_cmp, bitset_stats_andn, bitset_stats_andn_cmp, - bitset_stats_andn_or, bitset_stats_andn_or_cmp, bitset_stats_copy, - bitset_stats_count, bitset_stats_disable, bitset_stats_disjoint_p, - bitset_stats_dump, bitset_stats_empty_p, bitset_stats_enable, - bitset_stats_equal_p, bitset_stats_free, bitset_stats_init, - bitset_stats_list, bitset_stats_list_reverse, bitset_stats_not, - bitset_stats_ones, bitset_stats_or, bitset_stats_or_and, - bitset_stats_or_and_cmp, bitset_stats_or_cmp, bitset_stats_print, - bitset_stats_print_1, bitset_stats_read, bitset_stats_reset, - bitset_stats_set, bitset_stats_size, bitset_stats_subset_p, - bitset_stats_test, bitset_stats_toggle, bitset_stats_type_get, - bitset_stats_write, bitset_stats_xor, bitset_stats_xor_cmp, - bitset_stats_zero): Likewise. - * lib/bitsetv.c (bitsetv_alloc, bitsetv_create, bitsetv_free, - bitsetv_zero, bitsetv_ones, bitsetv_transitive_closure, - bitsetv_dump, debug_bitsetv): Likewise. - * lib/ebitset.c (ebitset_and, ebitset_and_cmp, ebitset_andn, - ebitset_andn_cmp, ebitset_bytes, ebitset_copy, ebitset_copy_, - ebitset_copy_cmp, ebitset_disjoint_p, ebitset_elt_add, - ebitset_elt_alloc, ebitset_elt_calloc, ebitset_elt_find, - ebitset_elt_free, ebitset_elt_last, ebitset_elt_remove, - ebitset_elt_zero_p, ebitset_elts_grow, ebitset_empty_p, - ebitset_equal_p, ebitset_free, ebitset_init, ebitset_list, - ebitset_list_reverse, ebitset_not, ebitset_ones, ebitset_op3_cmp, - ebitset_or, ebitset_or_cmp, ebitset_release_memory, ebitset_reset, - ebitset_set, ebitset_size, ebitset_subset_p, ebitset_test, - ebitset_weed, ebitset_xor, ebitset_xor_cmp, ebitset_zero): - Likewise. - * lib/lbitset.c (debug_lbitset, lbitset_and, lbitset_and_cmp, - lbitset_andn, lbitset_andn_cmp, lbitset_bytes, lbitset_copy, - lbitset_copy_cmp, lbitset_disjoint_p, lbitset_elt_alloc, - lbitset_elt_calloc, lbitset_elt_find, lbitset_elt_free, - lbitset_elt_link, lbitset_elt_unlink, lbitset_elt_zero_p, - lbitset_empty_p, lbitset_equal_p, lbitset_free, lbitset_init, - lbitset_list, lbitset_list_reverse, lbitset_not, lbitset_ones, - lbitset_op3_cmp, lbitset_or, lbitset_or_cmp, lbitset_prune, - lbitset_release_memory, lbitset_reset, lbitset_set, lbitset_size, - lbitset_subset_p, lbitset_test, lbitset_weed, lbitset_xor, - lbitset_xor_cmp, lbitset_zero): Likewise. - -2002-10-14 Akim Demaille <akim@epita.fr> - - Version 1.75. - -2002-10-14 Akim Demaille <akim@epita.fr> - - * tests/Makefile.am (maintainer-check-posix): New. - -2002-10-14 Akim Demaille <akim@epita.fr> - - * data/glr.c [YYDEBUG] (YYLEFTMOST_STATE): Initialize the yyloc - member. - -2002-10-14 Akim Demaille <akim@epita.fr> - - * src/tables.c (table_ninf_remap): base -> tab. - Reported by Matt Rosing. - -2002-10-14 Paul Eggert <eggert@twinsun.com> - - * tests/action.at, tests/calc.at, tests/conflicts.at, - tests/cxx-type.at, tests/headers.at, tests/input.at, - tests/regression.at, tests/synclines.at, tests/torture.at: - Say "bison -o foo.c foo.y", not "bison foo.y -o foo.c", - so that the tests still work even if POSIXLY_CORRECT is set. - * doc/bison.texinfo (Rpcalc Compile, Invocation): Likewise. - - * data/c.m4 (b4_int_type): Use yysigned_char instead of signed char, - for portability to K&R hosts. Fix typo: signed char is guaranteed - only to 127, not to 128. - * data/glr.c (yysigned_char): New type. - * data/yacc.c (yysigned_char): Likewise. - * tests/regression.at (Web2c Actions): signed char -> yysigned_char. - -2002-10-13 Paul Eggert <eggert@twinsun.com> - - * data/yacc.c (yyparse): Rewrite to avoid "comparison is always - true due to limited range of data type" warning from GCC. - - * data/c.m4 (b4_token_defines): Protect against double-inclusion - by wrapping enum yytokentype's definition inside #ifndef - YYTOKENTYPE. This undoes a bug I introduced on 2002-10-12. - -2002-10-13 Akim Demaille <akim@epita.fr> - - * data/glr.c (yyglrShiftDefer, yyaddDeferredAction, yydoAction): - Un yy- yyrhs to avoid the name clash with the global YYRHS. - -2002-10-13 Akim Demaille <akim@epita.fr> - - * Makefile.maint: Update from Autoconf 2.54. - * m4/strerror_r.m4 (AC_FUNC_STRERROR_R): Remove, shipped with 2.54. - -2002-10-13 Akim Demaille <akim@epita.fr> - - * src/print.c (print_state): Separate the list of solved conflicts - from the other items. - * tests/conflicts.at (Resolved SR Conflicts): Adjust. - -2002-10-13 Akim Demaille <akim@epita.fr> - - Let nondeterministic skeletons be usable with deterministic - tables. - - With the patch, GAWK compiled by GCC without -O2 passes its test - suite using a GLR parser driven by LALR tables. It fails with -O2 - because `struct stat' gives two different answers on my machine: - 88 (definition of an auto var) and later 96 (memset on this var). - Hence the stack is badly corrumpted. The headers inclusion is to - blame: if I move the awk.h inclusion before GLR's system header - inclusion, the two struct stat have the same size. - - * src/tables.c (pack_table): Always create conflict_table. - (token_actions): Always create conflict_list. - * data/glr.c (YYFLAG): Remove, unused. - -2002-10-13 Akim Demaille <akim@epita.fr> - - * configure.ac (AC_GNU_SOURCE): Use it instead of hand written code. - (O0FLAGS): New. - (VALGRIND, GXX): New. - * tests/atlocal.in (CFLAGS): Use O0FLAGS. - * tests/bison.in: Run $PREBISON a pre-command. - * tests/Makefile.am (maintainer-check, maintainer-check-valgrind) - (maintainer-check-g++): New. - * Makefile.am (maintainer-check): New. - -2002-10-13 Akim Demaille <akim@epita.fr> - - * data/glr.c: Formatting changes. - Tweak some trace messages to match yacc.c's. - -2002-10-13 Akim Demaille <akim@epita.fr> - - GLR parsers sometimes raise parse errors instead of performing the - default reduction. - Reported by Charles-Henry de Boysson. - - * tests/calc.at (_AT_CHECK_CALC, _AT_CHECK_CALC_ERROR): Don't - check the length of the traces when %glr. - (_AT_CHECK_CALC_ERROR): Also skip `^Stack' lines, coming from - GLR's traces. - (AT_CHECK_CALC_LALR, AT_CHECK_CALC_GLR): New. - Test GLR parsers. - * data/glr.c (YYLEFTMOST_STATE): Fix its value. - (yyltype): Remove the yy prefix from the member names. - (yytable): Complete its comment. - (yygetLRActions): Map error action number from YYTABLE from - YYTABLE_NINF to 0. - (yyisErrorAction): No longer compare YYACTION to YYPACT_NINF - (which was a bug: it should have been YYTABEL_NINF, and yet it was - not satisfying as we could compare an YYACTION computed from - YYDEFACT to YYTABLE_NINF although they are unrelated): 0 is the - only value for error actions. - (yyreportParseError): In verbose parse error messages, don't issue - `error' in the list of expected tokens. - * data/yacc.c (yyparse) <yybackup>: Rewrite the decoding of the - next action to perform to match glr.c's decoding. - (yytable): Complete its comment. - -2002-10-13 Paul Eggert <eggert@twinsun.com> - - Fix problem reported by Henrik Grubbstroem in - <http://lists.gnu.org/archive/html/bug-bison/2002-10/msg00098.html>: - "nonterm: { $$ = 123; } { $$ = $1; };" was wrongly rejected, - because the Bison parser reads the second action before reducing - the first one. - * src/scan-gram.l (rule_length): New static var. - Use it to keep track of the rule length in the scanner, since - we can't expect the parser to be in lock-step sync with the scanner. - (handle_action_dollar, handle_action_at): Use this var. - * tests/actions.at (Exotic Dollars): Test for the problem. - -2002-10-12 Paul Eggert <eggert@twinsun.com> - - * lib/timevar.c [! IN_GCC && HAVE_SYS_TIME_H]: Include <sys/time.h>. - * m4/timevar.m4 (BISON_PREREQ_TIMEVAR): Check for <sys/time.h>. - Include <sys/time.h> when checking for clock_t and struct tms. - Use same include order as source. - This is for the SunOS 4.1.4 porting bug reported by Peter Klein in - <http://lists.gnu.org/archive/html/bug-bison/2002-10/msg00016.html>. - - * lib/timevar.c: Update copyright date and clarify comments. - (get_time) [IN_GCC]: Keep the GCC version for reference. - - * lib/timevar.c, lib/timevar.h, lib/timevar.def: Import - GCC version as of today, then merge Bison's changes. - Change "GCC" to "Bison" in copyright notice. timevar.def's - author is Akim, so change that too. - - * src/reader.c (grammar_current_rule_check): - Don't worry about the default action if $$ is untyped. - Prevents bogus warnings reported by Jim Gifford in - <http://lists.gnu.org/archive/html/bug-bison/2002-10/msg00015.html>. - - * data/c.m4 (b4_token_enum): Do not define YYTOKENTYPE. - * data/glr.c, data/lalr1.cc, data/yacc.c: - Output token definitions before the first part of user declarations. - Fixes compatibility problem reported by Jim Gifford for kbd in - <http://lists.gnu.org/archive/html/bug-bison/2002-10/msg00014.html>. - -2002-10-11 Paul Eggert <eggert@twinsun.com> - - * data/yacc.c (yyreport_parse_error): Remove, putting its body into... - (yyparse): here. This undoes some of the 2002-07-25 change. - Compatibility problem reported by Ralf S. Engelschall with - OSSP cfg <http://www.ossp.org/pkg/lib/cfg/>. - -2002-10-11 Akim Demaille <akim@epita.fr> - - * tests/regression.at Characters Escapes): New. - * src/scan-gram.l (SC_ESCAPED_CHARACTER): Accept \' in strings and - characters. - Reported by Jan Nieuwenhuizen. - -2002-10-11 Akim Demaille <akim@epita.fr> - - * po/id.po: New. - -2002-10-10 Paul Eggert <eggert@twinsun.com> - - Portability fixes for bitsets; this also avoids several GCC - warnings. - - * lib/abitset.c: Include <stddef.h>, for offsetof. - * lib/lbitset.c: Likewise. - - * lib/abitset.c (abitset_bytes): Return a size that is aligned - properly for vectors of objects. Do not assume that adding a - header size to a multiple of a word size yields a value that is - properly aligned for the whole union. - * lib/bitsetv.c (bitsetv_alloc): Likewise. - - * lib/bitset_stats.c (bitset_stats_bytes): Adjust to new, - unique names for structures. - * lib/ebitset.c (ebitset_bytes): Likewise. - * lib/lbitset.c (lbitset_bytes): Likewise. - - * lib/abitset.c (abitset_ones, abitset_zero, abitset_empty_p, - abitset_copy1, abitset_not, abitset_equal_p, abitset_subset_p, - abitset_disjoint_p, abitset_and, abitset_and_cmp, abitset_andn, - abitset_andn_cmp, abitset_or, abitset_or_cmp, abitset_xor, - abitset_xor_cmp, abitset_and_or, abitset_and_or_cmp, - abitset_andn_or, abitset_andn_or_cmp, abitset_or_and, - abitset_or_and_cmp, abitset_copy): Supply prototype decls, - to improve the type-checking that GCC can do. - * lib/bitset.c (bitset_op4_cmp): Likewise. - * lib/bitset_stats.c (bitset_stats_count, - bitset_stats_empty_p, bitset_stats_ones, bitset_stats_zero, - bitset_stats_copy, bitset_stats_disjoint_p, - bitset_stats_equal_p, bitset_stats_not, bitset_stats_subset_p, - bitset_stats_and, bitset_stats_and_cmp, bitset_stats_andn, - bitset_stats_andn_cmp, bitset_stats_or, bitset_stats_or_cmp, - bitset_stats_xor, bitset_stats_xor_cmp, bitset_stats_and_or, - bitset_stats_and_or_cmp, bitset_stats_andn_or, - bitset_stats_andn_or_cmp, bitset_stats_or_and, - bitset_stats_or_and_cmp): Likewise. - * lib/lbitset.c (lbitset_and, lbitset_and_cmp, lbitset_andn, - lbitset_andn_cmp, lbitset_or, lbitset_or_cmp, lbitset_xor, - lbitset_xor_cmp, lbitset_empty_p, lbitset_ones, lbitset_not, - lbitset_subset_p, lbitset_disjoint_p, debug_lbitset): Likewise. - - * lib/abitset.h: Include bitset.h, not bbitset.h. - * lib/ebitset.h: Likewise. - * lib/lbitset.h: Likewise. - - * lib/bbitset.h: (enum_bitset_ops, enum_bitset_type): New types. - All instances of parameters of type enum bitset_opts are now of - type enum_bitset_opts, to conform to the C Standard, and similarly - for enum_bitset_type. - * lib/ebitset.c (enum_ebitset_find_mode): Likewise. - * lib/lbitset.c (enum_lbitset_find_mode): Likewise. - - Do not use "struct bitset_struct" to mean different things in - different modules. Not only is this confusing, it violates - the C Standard, which requires that structure types in different - modules must be compatible if one is to be passed to the other. - * lib/bbitset.h (bitset): Now points to a union, not to a struct. - All instances of "struct bitset_struct *" replaced with "bitset". - * lib/bitset.h (struct bitset_struct): Remove, replacing with.... - (union bitset_union, struct abitset_struct, struct ebitset_struct, - struct lbitset_struct, struct bitset_stats_struct): New types. - All uses of struct bitset_struct changed to union bitset_union, - etc. - * lib/abitset.c (struct abitset_struct, abitset, - struct bitset_struct): Remove. - * lib/bitset_stats.c (struct bitset_stats_struct, bitset_stats, - struct bitset_struct): Remove. - * lib/ebitset.c (struct ebitset_struct, ebitset, struct - bitset_struct): Remove. - * lib/lbitset.c (struct lbitset_struct, lbitset, bitset_struct): - Likewise. - - Do not call a function of type T using a call that assumes the - function is of a different type U. Standard C requires that a - function must be called with a type that is compatible with its - definition. - * lib/bbitset.h (bitset_and_or_, bitset_andn_or_, bitset_or_and_): - New decls. - * lib/bitset.c (bitset_and_or_, bitset_andn_or_, bitset_or_and_): - New functions. - * lib/ebitset.c (PFV): Remove. - * lib/lbitset.c (PFV): Likewise. - * lib/ebitset.c (ebitset_and, ebitset_andn, ebitset_or, - ebitset_xor, ebitset_copy, ebitset_ones, ebitset_empty_p): New - decls. - (ebitset_and, ebitset_andn, ebitset_or, ebitset_xor): New functions. - (ebitset_vtable): Use them. - * lib/lbitset.c (lbitset_and, lbitset_andn, lbitset_or, - lbitset_xor): New functions. - (lbitset_vtable): Use them. - - * lib/bitset.h (bitset_next, bitset_prev, bitset_only_set_p): - Declare. - - * lib/bitsetv.c (bitsetv_alloc): Add a cast to (void *) to avoid a - GCC warning. - * lib/lbitset.c (LBITSET_CURRENT1): Likewise. - Use offsetof, for simplicity. - -2002-10-06 Paul Eggert <eggert@twinsun.com> - - * lib/bitset.h (bitset_reset): Do not assume that bitset_word is - the same width as int. This reapplies a hunk of the 2002-08-12 patch - <http://lists.gnu.org/archive/html/bison-patches/2002-08/msg00007.html>, - which was inadvertently undone by the 2002-09-30 patch. - * lib/lbitset.c (debug_lbitset): Do not assume that bitset_word is - the same width as int. - -2002-10-04 Paul Eggert <eggert@twinsun.com> - - Version 1.50. - - * configure.ac (AC_INIT), NEWS: Increment version number. - - * doc/bison.texinfo: Minor spelling, grammar, and white space - fixes. - (Symbols): Mention that any negative value returned from yylex - signifies end-of-input. Warn about negative chars. Mention - the portable Standard C character set. - - The GNU coding standard says CFLAGS and YFLAGS are reserved - for the installer to set. - * lib/Makefile.am (AM_CFLAGS): Renamed from CFLAGS. - * src/Makefile.am (AM_CFLAGS): Likewise. - (AM_YFLAGS): Renamed from YFLAGS. - - Fix some MAX and MIN problems. - * src/gram.h (ITEM_NUMBER_MIN): MIN_MAX -> INT_MIN. - * src/lalr.h (GOTO_NUMBER_MAX): INT_MAX -> SHRT_MAX. - * src/symtab.h (SYMBOL_NUMBER_MAX): New macro. - * src/reader.c (reader): Use it. - - * tests/regression.at (Braces parsing): Use grep, not fgrep, as - POSIX 1003.1-2001 has removed fgrep. - -2002-10-04 Michael Hayes <m.hayes@elec.canterbury.ac.nz> - - * lib/bbitset.h (BITSET_WINDEX_MAX): Redefine so that it cannot be - interpreted as signed. - * lib/ebitset.c (ebitset_list): Fix bug. - -2002-10-01 Paul Eggert <eggert@twinsun.com> - - More fixes for 64-bit hosts and large bitsets. - - * lib/abitset.c (struct abitset_struct.n_bits, abitset_small_list, - abitset_size, abitset_list, abitset_list_reverse, abitset_list): - Use bitset_bindex, not int or unsigned int or size_t, to count bits. - * lib/bbitset.h (struct bitset_vtable.size, struct bitset_vtable.count, - struct bitset_vtable.list, struct bitset_vtable.list_reverse, - bitset_count_, bitset_next, bitset_prev, bitset_first, bitset_last, - bitset_count_): Likewise. - * lib/bitset.h (bitset_iterator.num, bitset_iterator.i, - bitset_first, bitset_last): Likewise. - * lib/bitset_stats.c (bitset_stats_size, bitset_stats_list, - bitset_stats_list_reverse, bitset_stats_size, - bitset_stats_count, bitset_stats_list, bitset_stat_list_reverse): - Likewise. - * lib/bitsetv-print.c (bitsetv_matrix_dump): Likewise. - * lib/bitsetv.c (bitsetv_alloc, bitsetv_create, bitsetv_free, - bitsetv_zero, bitsetv_ones, bitsetv_transitive_closure, - bitsetv_reflexive_transitive_closure): Likewise. - * lib/bitsetv.h (bitsetv_alloc, bitsetv_create): Likewise. - * lib/ebitset.c (ebitset_size, ebitset_list, ebitset_list_reverse): - Likewise. - * lib/lbitset.c (lbitset_size, lbitset_list, lbitset_list_merge): - Likewise. - - * lib/abitset.c (abitset_ones, abitset_zero, abitset_bytes): - Use size_t, not unsigned int, to count bytes. - * lib/abitset.h (abitset_bytes): Likewise. - * lib/bitset.c (bitset_bytes, bitset_alloc, bitset_obstack_alloc): - Likewise. - * lib/bitset.h (bitset_bytes): Likewise. - * lib/bitset_stats.c (bitset_stats_bytes, bitset_stats_init): Likewise. - * lib/bitset_stats.h (bitset_stats_bytes): Likewise. - * lib/bitsetv.c (bitsetv_alloc): Likewise. - * lib/ebitset.c (ebitset_bytes): Likewise. - * lib/ebitset.h (ebitset_bytes): Likewise. - * lib/lbitset.c (lbitset_bytes): Likewise. - * lib/lbitset.h (lbitset_bytes): Likewise. - - * lib/abitset.c (abitset_empty_p, abitset_not, abitset_equal_p, - abitset_subset_p, abitset_disjoint_p, abitset_and, - abitset_and_cmp, abitset_andn, abitset_andn_cmp, abitset_or, - abitset_or_cmp, abitset_xor, abitset_xor_cmp, abitset_and_or, - abitset_and_or_cmp, abitset_andn_or, abitset_andn_or_cmp, - abitset_or_and, abitset_or_and_cmp): - Use bitset_windex instead of unsigned int. - * lib/bitsetv.c (bitsetv_dump, debug_bitsetv): Likewise. - * lib/ebitset.c (struct ebitset_struct.size, ebitset_elts_grow, - ebitset_elt_add, ebitset_elt_remove, ebitset_weed, - ebitset_elt_find, ebitset_list_reverse, ebitset_list, ebitset_init): - Likewise. - * lib/lbitset.c (lbitset_ones, lbitset_not): Likewise. - - * lib/bitset.c (bitset_print): - Use proper printf formats for widths of integer types. - * lib/bitset_stats.c (bitset_percent_histogram_print, - bitset_log_histogram_print, bitset_stats_print_1): Likewise. - * lib/bitsetv-print.c (bitsetv_matrix_dump): Likewise. - * lib/bitsetv.c (bitsetv_dump, debug_bitsetv): Likewise. - * lib/lbitset.c (lbitset_bytes): Likewise. - - * lib/bbitset.h (BITSET_BINDEX_MAX, BITSET_WINDEX_MAX, - BITSET_SIZE_MAX): New macros. - (BITSET_INDEX_MAX): Remove. It wasn't right, since it assumed that - sizeof (bitset_word) == sizeof (bitset_windex). All uses changed - to BITSET_WINDEX_MAX. - - * lib/bitset.c (bitset_next, bitset_prev, bitset_first, - bitset_last): Return BITSET_BINDEX_MAX (not -1) for no value, - since we now return the bitset_bindex type (not int). - - * lib/bitsetv.c (bitsetv_alloc): Check for arithmetic overflow - when computing sizes. - * lib/ebitset.c (ebitset_elts_grow): Likewise. - - * lib/lbitset.c (lbitset_elt_find): Simplify windex calculation - and avoid cast to unsigned. - -2002-09-30 Akim Demaille <akim@epita.fr> - - * lib/abitset.c, lib/bbitset.h, lib/bitset.c, lib/bitset.h, - * lib/bitset_stats.c, lib/bitsetv.c, lib/ebitset.c, lib/lbitset.c: - Updates from Michael Hayes. - -2002-09-30 Art Haas <ahaas@neosoft.com> - - * configure.ac: Update AC_OUTPUT and AM_CONFIG_HEADER - invocations. - * tests/cxx-type.at (declarator): Don't rely on NDEBUG being not - defined. - -2002-09-27 Akim Demaille <akim@epita.fr> - - Version 1.49c. - -2002-09-27 Akim Demaille <akim@epita.fr> - - * configure.ac (AM_INIT_AUTOMAKE): We _need_ 1.7. - (Because of AC_LIBSOURCE). - -2002-09-27 Akim Demaille <akim@epita.fr> - - Playing with Autoscan. - - * configure.ac: Remove the old LIBOBJ tweaks. - (AC_REPLACE_FUNCS): Add strrchr and strtol. - * lib/strrchr.c: New. - * lib/strtol.c: New, from the Coreutils 4.5.1. - -2002-09-27 Akim Demaille <akim@epita.fr> - - Playing with Autoscan. - - * m4/prereq.m4 (jm_PREREQ_ARGMATCH, jm_FUNC_ARGMATCH): New. - * lib/Makefile.am (libbison_a_SOURCES): No longer include - argmatch.c and argmatch.h, since they are AC_LIBSOURCE'd. - * lib/strcasecmp.c, lib/strncasecmp.c, lib/memcmp.c: New, from the - Coreutils 4.5.1. - -2002-09-24 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Stack Overflow): xref to Recursion. - (Frequently Asked Questions, Parser Stack Overflow): New. - -2002-09-13 Akim Demaille <akim@epita.fr> - - Playing with autoscan. - - * src/reader.c (get_merge_function): Use xstrdup, not strdup. - * src/files.c (skeleton_find): Remove, unused. - * m4/memcmp.m4: New, from the Coreutils 4.5.1. - * m4/prereq.m4 (jm_PREREQ_QUOTEARG): Run jm_FUNC_MEMCMP. - -2002-09-13 Akim Demaille <akim@epita.fr> - - * configure.ac (AM_INIT_AUTOMAKE): Require Automake 1.6.3. - * Makefile.am (AUTOMAKE_OPTIONS): Don't. - -2002-09-13 Akim Demaille <akim@epita.fr> - - * configure.ac: Require 2.54. - s/jm_FUNC_MALLOC/AC_FUNC_MALLOC/. - s/jm_FUNC_REALLOC/AC_FUNC_REALLOC/. - * m4/c-bs-a.m4, m4/malloc.m4, m4/mbstate_t.m4, m4/realloc.m4: - Remove, provided by Autoconf macros. - -2002-09-12 Akim Demaille <akim@epita.fr> - - * m4/prereq.m4: Update, from Coreutils 4.5.1. - -2002-09-12 Akim Demaille <akim@epita.fr> - - * m4/prereq.m4: Update, from Fileutils 4.1.5. - * configure.ac (jm_PREREQ_TEMPNAME): Invoke it. - Reported by Martin Mokrejs. - -2002-09-10 Akim Demaille <akim@epita.fr> - - * src/parse-gram.y: Associate a human readable string to each - token type. - * tests/regression.at (Invalid inputs): Adjust. - -2002-09-10 Gary V. Vaughan <gary@gnu.org> - - * tests/Makefile.am ($(srcdir)/package.m4): Bison now ships - with an Autoconf-2.5x style configure.ac. - -2002-09-06 Paul Eggert <eggert@twinsun.com> - - * doc/bison.texinfo (Conditions): Make explicit that the GPL - exception applies only to yacc.c. This is a modification of a - patch originally suggested by Akim Demaille. - -2002-09-06 Akim Demaille <akim@epita.fr> - - * data/c.m4 (b4_copyright): Move the GPL exception comment from - here to... - * data/yacc.c: here. - - * data/lalr1.cc (struct yyltype): Don't define it, since we use - LocationType. - (b4_ltype): Default to yy::Location from location.hh. - -2002-09-04 Jim Meyering <jim@meyering.net> - - * data/yacc.c: Guard the declaration of yytoknum also with - `#ifdef YYPRINT', so it is declared only when used. - -2002-09-04 Akim Demaille <akim@epita.fr> - - * configure.in: Rename as... - * configure.ac: this. - Bump to 1.49c. - -2002-09-04 Akim Demaille <akim@epita.fr> - - * src/assoc.c, src/closure.c, src/gram.c, src/injections.c, - * src/lalr.c, src/LR0.c, src/relation.c, src/tables.c: Don't - translate maintainer only messages. - -2002-08-12 Paul Eggert <eggert@twinsun.com> - - Version 1.49b. - - * Makefile.am (SUBDIRS): Remove intl. - (DISTCLEANFILES): Remove. - * NEWS: Mention that GNU M4 is now required. Clarify what is - meant by "larger grammars". Mention the pt_BR translation. - * configure.in (AC_CHECK_DECLS): Add getenv, getopt. - (AM_GNU_GETTEXT_VERSION): New macro, replacing GETTEXT_VERSION var. - Bump version from 0.11.2 to 0.11.5. - (BISON_PREREQ_STAGE): Remove. - (AM_GNU_GETTEXT): Use external gettext. - (AC_OUTPUT): Remove intl/Makefile. - - * config/depcomp, config/install-sh: Sync with Automake 1.6.3. - - * data/glr.c: Include string.h, for strlen. - (yyreportParseError): Use size_t for yysize. - (yy_yypstack): No longer nested inside yypstates, as nested - functions are not portable. Do not assume size_t is the - same width as int. - (yypstates): Do not assume that ptrdiff_t is the same width - as int, and similarly for yyposn and YYINDEX. - - * data/yacc.c: Fix comment about `$$ = $1': it can copy garbage. - - * lib/Makefile.am (INCLUDES): Do not include from the intl - directory, which has been removed. - * src/Makefile.am (INCLUDES): Likewise. - - * lib/Makefile.am (libbison_a_SOURCES): Add unlocked-io.h. - (bitsets_sources, additional_bitsets_sources, timevars_sources): - New vars. - - * lib/Makefile.am (libbison_a_SOURCES): Avoid +=, a GNU make extension. - * tests/Makefile.am (EXTRA_DIST): Likewise. - - * lib/abitset.c (abitset_reverse_list, ebitset_reverse_list): - Do not assume that bitset_windex is the same width as unsigned. - - * lib/abitset.c (abitset_unused_clear): Do not assume that - bitset_word is the same width as int. - * lib/bbitset.h (BITSET_INDEX_MAX, BITSET_MSB): Likewise. - * lib/bitset.h (bitset_set, bitset_reset): Likewise. - * lib/bitset_stats.c (bitset_stats_set, bitset_stats_reset): Likewise. - * lib/ebitset.c (ebitset_set, ebitset_reset): Likewise. - * lib/lbitset.c (lbitset_set, lbitset_reset): Likewise. - - * lib/abitset.c (abitset_op1): Use -1, not ~0, as memset arg (for - portability to one's complement hosts!). - * lib/ebitset.c (ebitset_op1): Likewise. - * lib/lbitset.c (lbitset_op1): Likewise. - - * lib/argmatch.c, lib/quotearg.c, quotearg.h: Sync with GNU tar. - * lib/argmatch.h, lib/basename.c, lib/dirname.c, lib/dirname.h, - lib/hash.c, lib/hash.h, lib/strnlen.c, lib/xmalloc.c: - Sync with fileutils. - * lib/error.c, lib/getopt.c, lib/getopt.h, lib/getopt1.c, - lib/gettext.h: Sync with diffutils. - - * lib/memrchr.c, lib/mkstemp.c, lib/strchr.c, lib/strnlen.c, - lib/strspn.c, lib/tempname.c: Use GPL, not LGPL. - - * lib/obstack.c, lib/obstack.h: Sync with fileutils, except use - PROTOTYPES to check for prototypes, and "defined __STDC__" to - check for void *. - - * lib/bbitset.h (BITSET_WORD_BITS): Now of type unsigned, not - size_t; the old version tried to do this but casted improperly. - (bitset_bindex, bitset_windex): Now size_t, not unsigned long. - (bitset_test): Now returns int, not unsigned long. - - * lib/bitset_stats.c: Include "gettext.h". - (_): New macro. - (bitset_stats_set, bitset_stats_reset, bitset_stats_test): Don't - name locals "index", as it generates unnecessary warnings on some - hosts that have an "index" function. - - * lib/bitset_stats.c (bitset_stats_print_1, bitset_stats_print, - bitset_stats_read, bitset_stats_write): Wrap strings in _() if - they need translation. - * src/LR0.c (state_list_append, new_itemsets, get_state, - append_states, generate_states): Likewise. - * src/assoc.c (assoc_to_string): Likewise. - * src/closure.c (print_closure, set_firsts, closure): Likewise. - * src/gram.c (grammar_dump): Likewise. - * src/injections.c (injections_compute): Likewise. - * src/lalr.c (lookaheads_print): Likewise. - * src/relation.c (relation_transpose): Likewise. - * src/scan-gram.l: Likewise. - * src/tables.c (table_grow, pack_vector): Likewise. - - * m4/Makefile.am (EXTRA_DIST): Remove codeset.m4, - glibc21.m4, isc-posix.m4 lcmessage.m4, stage.m4. - * m4/malloc.m4, m4/realloc.m4: Sync with diffutils. - * m4/mbstate_t.m4: Sync with fileutils. - * m4/prereq.m4 (jm_PREREQ_QUOTEARG): AC_MBSTATE_T -> AC_TYPE_MBSTATE_T. - - * po/LINGUAS: Add pt_BR. - * po/POTFILES.in: Add src/assoc.c, src/closure.c, src/gram.c, - src/main.c, src/relation.c, src/state.c, lib/bitset_stats.c, - lib/timevar.c. - Use src/parse-gram.y instead of src/parse-gram.c, as the gettext - manual recommends. - Similarly, use src/scan-gram.l instead of src/scan-gram.c. - - * src/complain.c (strerror_r): Remove decl; not needed. - (strerror): Use same pattern as ../lib/error.c. - - * src/files.c, src/files.h (compute_header_macro): Remove; unused. - - * src/gram.c (grammar_dump): Do not assume ptrdiff_t fits in int. - - * src/main.c (main): Cast result of bindtextdomain and textdomain - to void, to avoid a GCC warning when --disable-nls is in effect. - - * src/scan-gram.l: Use strings rather than escapes when possible, - to minimize the number of warnings from xgettext. - (handle_action_dollar, handle_action_at): Don't use isdigit, - as it mishandles negative chars and it may not work as expected - outside the C locale. - - * src/symtab.c (symbol_get): Don't cast LHS of an assignment; - this is a GCC extension and is not portable to other compilers. - - * src/system.h (alloca): Use same pattern as ../lib/error.c. - Do not include <ctype.h>; no longer needed. - Do not include <malloc.h>; no longer needed (and generates - warnings on OpenBSD 3.0). - - * tests/cxx-type.at (yylex): Do not pass signed char to isupper; - it's not portable. - - * tests/regression.at: Do not use 'cc -c input.c -o input'; - Sun C rejects this. Instead, use 'cc -c input.c -o input.o'. - - * tests/synclines.at (AC_SYNCLINES_COMPILE): Accept any nonzero - exit status as failure, not just exit status 1. Sun C exits - with status 2 sometimes. - - * tests/torture.at (AT_INCREASE_DATA_SIZE): New macro. - Use it for the two large tests. - -2002-08-02 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (conflicts_output): Don't output rules never - reduced here, since anyway that computation doesn't work. - * src/gram.h, src/gram.h (rule_filter_t, rule_useful_p) - (rule_useless_p, rule_never_reduced_p): New. - (grammar_rules_partial_print): Use a filter instead of a range. - Display the title only if needed. - (grammar_rules_print): Adjust. - (grammar_rules_never_reduced_report): New. - * src/tables.c (action_row): Move the computation of rules never - reduced to... - (token_actions): here. - * src/main.c (main): Make the parser before making the report, so - that rules never reduced are computed. - Call grammar_rules_never_reduced_report. - * src/print.c (print_results): Report rules never reduced. - * tests/conflicts.at, tests/reduce.at: Adjust. - -2002-08-01 Akim Demaille <akim@epita.fr> - - Instead of attaching lookaheads and duplicating the rules being - reduced by a state, attach the lookaheads to the reductions. - - * src/state.h (state_t): Remove the `lookaheads', - `lookaheads_rule' member. - (reductions_t): Add a `lookaheads' member. - Use a regular array for the `rules'. - * src/state.c (reductions_new): Initialize the lookaheads member - to 0. - (state_rule_lookaheads_print): Adjust. - * src/state.h, src/state.c (state_reductions_find): New. - * src/conflicts.c (resolve_sr_conflict, set_conflicts) - (count_rr_conflicts): Adjust. - * src/lalr.c (LArule): Remove. - (add_lookback_edge): Adjust. - (state_lookaheads_count): New. - (states_lookaheads_initialize): Merge into... - (initialize_LA): this. - (lalr_free): Adjust. - * src/main.c (main): Don't free nullable and derives too early: it - is used by --verbose. - * src/print.c, src/print_graph.c, src/tables.c: Adjust. - -2002-08-01 Akim Demaille <akim@epita.fr> - - * src/derives.h, src/derives.c (derives): A `rule_t***' instead of - `rule_number_t**'. - (set_derives, free_derives): Rename as... - (derives_compute, derives_free): this. - Adjust all dependencies. - * src/nullable.c (set_nullable, free_nullable): Rename as... - (nullable_compute, nullable_free): these. - (rule_list_t): Store rule_t *, not rule_number_t. - * src/state.c (state_rule_lookaheads_print): Directly compare rule - pointers, instead of their numbers. - * src/main.c (main): Call nullable_free, and derives_free earlier, - as they were lo longer used. - -2002-08-01 Akim Demaille <akim@epita.fr> - - * lib/timevar.c (get_time): Include children time. - * src/lalr.h (LA, LArule): Don't export them: used with the - state_t. - * src/lalr.c (LA, LArule): Static. - * src/lalr.h, src/lalr.c (lalr_free): New. - * src/main.c (main): Call it. - * src/tables.c (pack_vector): Check whether loc is >= to the - table_size, not >. - (pack_tables): Don't free froms, tos, conflict_tos, and pos... - (tables_generate): do it, since that's also it which allocates - them. - Don't free LA and LArule, main does. - -2002-07-31 Akim Demaille <akim@epita.fr> - - Separate parser tables computation and output. - - * src/output.c (nvectors, base_t, base, base_ninf, conflict_table) - (conflict_list, conflict_list_cnt, table, check, table_ninf) - (yydefgoto, yydefact, high): Move to... - * src/tables.h, src/tables.c: here. - * src/output.c (vector_number_t, VECTOR_NUMBER_MAX) - (VECTOR_NUMBER_MIN, state_number_to_vector_number) - (symbol_number_to_vector_number, nvectors, BASE_MAX, BASE_MIN) - (froms, tos, conflict_tos, tally, width, action_t, ACTION_MAX) - (ACTION_MIN, actrow, order, nentries, pos, conflrow) - (conflict_list_free, table_size, lowzero, table_grow, conflict_row) - (action_row, save_row, token_actions, save_column, default_goto) - (goto_actions, sort_actions, matching_state, pack_vector) - (table_ninf_remap, pack_table, prepare_actions): Move to... - * src/tables.c: here. - * src/tables.h, src/tables.c(tables_generate, tables_free): New. - * src/output.c (token_actions, output_base, output_conflicts) - (output_check): Merge into... - (prepare_actions): this. - (actions_output): Rename as... - (user_actions_output): this. - * src/main.c (main): Call tables_generate and tables_free. - -2002-07-31 Akim Demaille <akim@epita.fr> - - Steal GCC's --time-report support. - - * lib/timevar.c, lib/timevar.h, lib/timevar.def: New, - stolen/adjusted from GCC. - * m4/stage.m4: Remove time related checks. - * m4/timevar.m4: New. - * configure.in: Adjust. - * src/system.h: Adjust to using timevar.h. - * src/getargs.h, src/getargs.c: Support trace_time for - --trace=time. - * src/main.c (stage): Remove. - (main): Replace `stage' invocations with timevar calls. - * src/output.c: Insert pertinent timevar calls. - -2002-07-31 Akim Demaille <akim@epita.fr> - - Let --trace have arguments. - - * src/getargs.h (enum trace_e): New. - * src/getargs.c (trace_args, trace_types, trace_argmatch): New. - (long_options, short_options): --trace/-T takes an optional - argument. - Change all the uses of trace_flag to reflect the new flags. - * tests/sets.at (Firsts, Nullable, Broken Closure): Use --trace=sets. - - Strengthen `stage' portability. - - * m4/stage.m4 (BISON_PREREQ_STAGE): New. - * configure.in: Use it. - Don't check for malloc.h and sys/times.h. - * src/system.h: Include them when appropriate. - * src/main.c (stage): Compile only when mallinfo, struct mallinfo, - times and struct tms are available. - -2002-07-30 Akim Demaille <akim@epita.fr> - - In verbose parse error message, don't report `error' as an - expected token. - * tests/actions.at (Printers and Destructors): Adjust. - * tests/calc.at (Calculator $1): Adjust. - * data/yacc.c, data/glr.c, data/lalr1.c: When making the verbose - error message, do not report the parser accepts the error token in - that state. - -2002-07-30 Akim Demaille <akim@epita.fr> - - Normalize conflict related messages. - - * src/complain.h, src/complain.c (warn, complain): New. - * src/conflicts.c (conflicts_print): Use them. - (conflict_report_yacc): New, extracted from... - (conflicts_print): here. - * tests/conflicts.at, tests/existing.at: Adjust. - -2002-07-30 Akim Demaille <akim@epita.fr> - - Report rules which are never reduced by the parser: those hidden - by conflicts. - - * src/LR0.c (save_reductions): Don't make the final state too - different: save its reduction (accept) instead of having a state - without any action (no shift or goto, no reduce). - Note: the final state is now a ``regular'' state, i.e., the - parsers now contain `reduce 0' as default reduction. - Nevertheless, since they decide to `accept' when yystate = - final_state, they still will not reduce rule 0. - * src/print.c (print_actions, print_reduction): Adjust. - * src/output.c (action_row): Track reduced rules. - (token_actions): Report rules never reduced. - * tests/conflicts.at, tests/regression.at: Adjust. - -2002-07-30 Akim Demaille <akim@epita.fr> - - `stage' was accidently included in a previous patch. - Initiate its autoconfiscation. - - * configure.in: Look for malloc.h and sys/times.h. - * src/main.c (stage): Adjust. - Report only when trace_flag. - -2002-07-29 Akim Demaille <akim@epita.fr> - - * src/state.h, src/state.c (transitions_t): Holds state_t*'s, not - state_number_t. - (errs_t): symbol_t*, not symbol_number_t. - (reductions_t): rule_t*, not rule_number_t. - (FOR_EACH_SHIFT): New. - * src/LR0.c, src/conflicts.c, src/lalr.c, src/output.c - * src/print.c, src/print_graph.c: Adjust. - -2002-07-29 Akim Demaille <akim@epita.fr> - - Use $accept and $end, as BYacc and BTYacc do, instead of $axiom and $. - - * src/symtab.h, src/symtab.c (eoftoken, axiom): Rename as... - (endtoken, accept): these. - * src/reader.c (reader): Set endtoken's default tag to "$end". - Set undeftoken's tag to "$undefined" instead of "$undefined.". - * doc/bison.texinfo (Table of Symbols): Mention $accept and $end. - Adjust. - -2002-07-29 Akim Demaille <akim@epita.fr> - - * src/reduce.c (reduce_grammar): When the language is empty, - complain about the start symbol, not the axiom. - Use its location. - * tests/reduce.at (Empty Language): New. - -2002-07-26 Akim Demaille <akim@epita.fr> - - * src/reader.h, src/reader.c (gram_error): ... can't get - yycontrol without making too strong assumptions on the parser - itself. - * src/output.c (prepare_tokens): Use the real 0th value of - token_translations instead of `0'. - * src/parse-gram.y (yyerror): Don't rely on yycontrol being - visible here. - * data/yacc.c (yyreport_parse_error): Rename yylocation as yylloc - for the time being: %locations ought to provide it to yyerror. - -2002-07-25 Akim Demaille <akim@epita.fr> - - * src/output.c (prepare_tokens): Go up to ntokens, not ntokens + 1. - * doc/bison.texinfo (Decl Summary): s/$illegal/$undefined./. - * tests/regression.at (Web2c Actions): Adjust. - -2002-07-25 Akim Demaille <akim@epita.fr> - - Stop storing rules from 1 to nrules + 1. - - * src/LR0.c, src/closure.c, src/derives.c, src/gram.c, src/lalr.c - * src/nullable.c, src/output.c, src/print.c, src/reader.c - * src/reduce.c: Allocate and free from &rules[0], not &rules[1]. - Iterate from 0 to nrules. - Use rule_number_as_item_number and item_number_as_rule_number. - Adjust to `derive' now containing possibly 0. - * src/gram.h (rule_number_as_item_number, item_number_as_rule_number): - Handle the `- 1' part in rule numbers from/to item numbers. - * src/conflicts.c (log_resolution): Fix the message which reversed - shift and reduce. - * src/output.c (action_row): Initialize default_rule to -1. - (token_actions): Adjust. - * tests/sets.at (Nullable, Firsts): Fix the previously bogus - expected output. - * tests/conflicts.at (Resolved SR Conflicts): Likewise. - -2002-07-25 Akim Demaille <akim@epita.fr> - - * data/c.m4 (b4_c_function, b4_c_ansi_args, b4_c_ansi_arg) - (b4_c_knr_arg_names, b4_c_knr_arg_name, b4_c_knr_arg_decls) - (b4_c_knr_arg_decl): New. - * data/yacc.c: Use it to define yysymprint, yydestruct, and - yyreport_parse_error. - -2002-07-25 Akim Demaille <akim@epita.fr> - - * data/yacc.c (yyreport_parse_error): New, extracted from... - (yyparse): here. - (yydestruct, yysymprint): Move above yyparse. - Be K&R compliant. - -2002-07-25 Akim Demaille <akim@epita.fr> - - * data/c.m4 (b4_ints_in, b4_int_type, b4_int_type_for): New, - replace... - (b4_sint_type, b4_uint_type): these. - * data/yacc.c, data/glr.c, data/lalr1.cc: Use b4_int_type_for. - * tests/regression.at (Web2c Actions): Adjust. - -2002-07-25 Akim Demaille <akim@epita.fr> - - * src/gram.h (TIEM_NUMBER_MAX): New. - (item_number_of_rule_number, rule_number_of_item_number): Rename - as... - (rule_number_as_item_number, item_number_as_rule_number): these. - Adjust dependencies. - * src/output.c (vector_number_t, VECTOR_NUMBER_MAX) - (VECTOR_NUMBER_MIN, state_number_to_vector_number) - (symbol_number_to_vector_number): New. - (order): Of vector_number_t* type. - (base_t, BASE_MAX, BASE_MIN): New. - (froms, tos, width, pos, check): Of base_t type. - (action_number_t, ACTION_MIN, ACTION_MAX): New. - (actrow): Of action_number_t type. - (conflrow): Of unsigned int type. - (table_ninf, base_ninf): New. - (GENERATE_MUSCLE_INSERT_TABLE): Also output the `*_min' value. - (muscle_insert_int_table, muscle_insert_base_table) - (muscle_insert_rule_number_table): New. - (prepare_tokens): Output `toknum' as int_table. - (action_row): Returns a rule_number_t. - Use ACTION_MIN, not SHRT_MIN. - (token_actions): yydefact is rule_number_t*. - (table_ninf_remap): New. - (pack_table): Use it for `base' and `table'. - * data/yacc.c, data/glr.c, data/lalr1.cc (YYFLAG): Remove, - replaced with... - (YYPACT_NINF, YYTABLE_NINF): these. - (yypact, yytable): Compute their types instead of hard-coded - `short'. - * tests/regression.at (Web2c Actions): Adjust. - -2002-07-19 Akim Demaille <akim@epita.fr> - - * src/scan-gram.l (id): Can start with an underscore. - -2002-07-16 Akim Demaille <akim@epita.fr> - - * src/assoc.c, src/asssoc.h (assoc_t, assoc_to_string): New. - Adjust all former `associativity' dependencies. - * src/symtab.c (symbol_new): Default associativity is `undef', not - `right'. - (symbol_check_alias_consistence): Adjust. - -2002-07-09 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo: Properly set the ``header'' part. - Use @dircategory ``GNU programming tools'' as per Texinfo's - documentation. - Use @copying. - -2002-07-09 Akim Demaille <akim@epita.fr> - - * lib/quotearg.h: Protect against multiple inclusions. - * src/location.h (location_t): Add a `file' member. - (LOCATION_RESET, LOCATION_PRINT): Adjust. - * src/complain.c (warn_at, complain_at, fatal_at): Drop - `error_one_per_line' support. - -2002-07-09 Akim Demaille <akim@epita.fr> - - * src/complain.h, src/complain.c (warn, complain): Remove, unused. - * src/reader.c (lineno): Remove. - Adjust all dependencies. - (get_merge_function): Take a location and use complain_at. - * src/symtab.h, src/symtab.c (symbol_make_alias): Likewise. - * tests/regression.at (Invalid inputs, Mixing %token styles): - Adjust. - -2002-07-09 Akim Demaille <akim@epita.fr> - - * src/parse-gram.y (rules_or_grammar_declaration): Add an error - recovery rule, and forbid extensions when --yacc. - (gram_error): Use complain_at. - * src/reader.c (reader): Exit if there were parse errors. - -2002-07-09 Akim Demaille <akim@epita.fr> - - * tests/synclines.at (AT_SYNCLINES_COMPILE): New. - (AT_TEST_SYNCLINE): Adjust to unusual GCC outputs. - Reported by R Blake <blakers@mac.com>. - -2002-07-09 Akim Demaille <akim@epita.fr> - - * data/yacc.c: Output the copyright notive in the header. - -2002-07-03 Akim Demaille <akim@epita.fr> - - * src/output.c (froms, tos): Are state_number_t. - (save_column): sp, sp1, and sp2 are state_number_t. - (prepare): Rename `final' as `final_state_number', `nnts' as - `nterms_number', `nrules' as `rules_number', `nstates' as - `states_number', and `ntokens' as `tokens_number'. Remove `nsym', - unused. - * data/yacc.c, data/glr.c, data/lalr1.cc: Adjust. - * data/lalr1.cc (nsym_): Remove, unused. - -2002-07-03 Akim Demaille <akim@epita.fr> - - * src/lalr.h, src/lalr.c (goto_number_t): New. - * src/lalr.c (goto_list_t): New. - Propagate them. - * src/nullable.c (rule_list_t): New. - Propagate. - * src/types.h: Remove. - -2002-07-03 Akim Demaille <akim@epita.fr> - - * src/closure.c (print_fderives): Use rule_rhs_print. - * src/derives.c (print_derives): Use rule_rhs_print. - (rule_list_t): New, replaces `shorts'. - (set_derives): Add comments. - * tests/sets.at (Nullable, Firsts): Adjust. - -2002-07-03 Akim Demaille <akim@epita.fr> - - * src/output.c (prepare_actions): Free `tally' and `width'. - (prepare_actions): Allocate and free `order'. - * src/symtab.c (symbols_free): Free `symbols'. - * src/scan-gram.l (scanner_free): Clear Flex's scanners memory. - * src/output.c (m4_invoke): Move to... - * src/scan-skel.l: here. - (<<EOF>>): Close yyout, and free its name. - -2002-07-03 Akim Demaille <akim@epita.fr> - - Fix some memory leaks, and fix a bug: state 0 was examined twice. - - * src/LR0.c (new_state): Merge into... - (state_list_append): this. - (new_states): Merge into... - (generate_states): here. - (set_states): Don't ensure a proper `errs' state member here, do it... - * src/conflicts.c (conflicts_solve): here. - * src/state.h, src/state.c: Comment changes. - (state_t): Rename member `shifts' as `transitions'. - Adjust all dependencies. - (errs_new): For consistency, also take the values as argument. - (errs_dup): Remove. - (state_errs_set): New. - (state_reductions_set, state_transitions_set): Assert that no - previous value was assigned. - (state_free): New. - (states_free): Use it. - * src/conflicts.c (resolve_sr_conflict): Don't use an `errs_t' as - temporary storage: use `errs' and `nerrs' as elsewhere. - (set_conflicts): Allocate and free this `errs'. - -2002-07-02 Akim Demaille <akim@epita.fr> - - * lib/libiberty.h: New. - * lib: Update the bitset implementation from upstream. - * src/closure.c, src/lalr.c, src/output.c, src/print_graph.c, - * src/state.c: Use BITSET_FOR_EACH, not BITSET_EXECUTE. - * src/main.c: Adjust bitset stats calls. - -2002-07-01 Paul Eggert <eggert@twinsun.com> - - * src/scan-gram.l (<SC_ESCAPED_CHARACTER>): Convert to unsigned - char, so that negative chars don't collide with $. - -2002-06-30 Akim Demaille <akim@epita.fr> - - Have the GLR tests be `warning' checked, and fix the warnings. - - * data/glr.c (YYFPRINTF): Always define it, not only when YYDEBUG - (yyuserAction, yyreportAmbiguity): `Use' all the arguments. - (yyremoveDeletes): `yyi' and `yyj' are size_t. - Use YYFPRINTF when under if (YYDEBUG) to avoid empty `if' bodies. - (yyaddDeferredAction): static. - (yyglrReduce): yyi, yyk, amd yyposn are size_t. - (yyreportParseError): yyprefix is const. - yytokenp is used only when verbose. - (yy__GNUC__): Replace with __GNUC__. - (yypdumpstack): yyi is size_t. - (yypreference): Un-yy local variables and arguments, to avoid - clashes with `yyr1'. Anyway, we are not in the user name space. - (yytname_size): be an int, as is compared with ints. - * tests/testsuite.at (AT_COMPILE, AT_PARSER_CHECK): New. - Use them. - * tests/cxx-gram.at: Use quotation to protect $1. - Use AT_COMPILE to enable warnings hunts. - Prototype yylex and yyerror. - `Use' argc. - Include `string.h', not `strings.h'. - Produce and prototype stmtMerge only when used. - yylex takes a location. - -2002-06-30 Akim Demaille <akim@epita.fr> - - We spend a lot of time in quotearg, in particular when --verbose. - - * src/symtab.c (symbol_get): Store a quoted version of the key. - (symbol_tag_get, symbol_tag_get_n, symbol_tag_print): Remove. - Adjust all callers. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/state.h (reductions_t): Rename member `nreds' as num. - (errs_t): Rename members `nerrs' and `errs' as `num' and `symbols'. - * src/state.c (ERRS_ALLOC, REDUCTIONS_ALLOC): Use the correct types. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/state.h, src/state.c (shift_t, SHIFT_SYMBOL, SHIFT_IS_SHIFT) - (SHIFT_IS_GOTO, SHIFT_IS_ERROR, SHIFT_DISABLE, SHIFT_IS_DISABLED) - (shifts_to): Rename as... - (transition_t, TRANSITION_SYMBOL, TRANSITION_IS_TRANSITION) - (TRANSITION_IS_GOTO, TRANSITION_IS_ERROR, TRANSITION_DISABLE) - (TRANSITION_IS_DISABLED, transitions_to): these. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/print.c (print_shifts, print_gotos): Merge into... - (print_transitions): this. - (print_transitions, print_errs, print_reductions): Align the - lookaheads columns. - (print_core, print_transitions, print_errs, print_state, - print_grammar): Output empty lines separator before, not after. - (state_default_rule_compute): Rename as... - (state_default_rule): this. - * tests/conflicts.at (Defaulted Conflicted Reduction), - (Unresolved SR Conflicts, Resolved SR Conflicts): Adjust. - * tests/regression.at (Rule Line Numbers, Web2c Report): Adjust. - -2002-06-30 Akim Demaille <akim@epita.fr> - - Display items as we display rules. - - * src/gram.h, src/gram.c (rule_lhs_print): New. - * src/gram.c (grammar_rules_partial_print): Use it. - * src/print.c (print_core): Likewise. - * tests/conflicts.at (Defaulted Conflicted Reduction), - (Unresolved SR Conflicts): Adjust. - (Unresolved SR Conflicts): Adjust and rename as... - (Resolved SR Conflicts): this, as was meant. - * tests/regression.at (Web2c Report): Adjust. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/print.c (state_default_rule_compute): New, extracted from... - (print_reductions): here. - Pessimize, but clarify the code. - * tests/conflicts.at (Defaulted Conflicted Reduction): New. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/output.c (action_row): Let default_rule be always a rule - number. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/closure.c (print_firsts, print_fderives, closure): - Use BITSET_EXECUTE. - * src/lalr.c (lookaheads_print): Likewise. - * src/state.c (state_rule_lookaheads_print): Likewise. - * src/print_graph.c (print_core): Likewise. - * src/print.c (print_reductions): Likewise. - * src/output.c (action_row): Likewise. - Use SHIFT_IS_DISABLED, SHIFT_IS_SHIFT and SHIFT_SYMBOL. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/print_graph.c: Use report_flag. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/lalr.c (traverse, digraph, matrix_print, transpose): Move - to... - * src/relation.h, src/relation.c (traverse, relation_digraph) - (relation_print, relation_transpose): New. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/state.h, src/state.c (shifts_to): New. - * src/lalr.c (build_relations): Use it. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/gram.h (rule_number_t, RULE_NUMBER_MAX, int_of_rule_number) - (item_number_of_rule_number, rule_number_of_item_number): New. - * src/LR0.c, src/closure.c, src/derives.c, src/derives.h, - * src/gram.c, src/lalr.c, src/nullable.c, src/output.c, src/print.c, - * src/print_graph.c, src/reader.c, src/reduce.c, src/reduce.h: - Propagate their use. - Much remains to be done, in particular wrt `shorts' from types.h. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/symtab.c (symbol_new): Initialize the `printer' member. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/LR0.c (save_reductions): Remove, replaced by... - * src/state.h, src/state.c (state_reductions_set): New. - (reductions, errs): Rename as... - (reductions_t, errs_t): these. - Adjust all dependencies. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/LR0.c (state_list_t, state_list_append): New. - (first_state, last_state): Now symbol_list_t. - (this_state): Remove. - (new_itemsets, append_states, save_reductions): Take a state_t as - argument. - (set_states, generate_states): Adjust. - (save_shifts): Remove, replaced by... - * src/state.h, src/state.c (state_shifts_set): New. - (shifts): Rename as... - (shifts_t): this. - Adjust all dependencies. - * src/state.h (state_t): Remove the `next' member. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/vcg.c (quote): Use slot 2, since we often pass symbol tag - escaped in slot 0. - -2002-06-30 Akim Demaille <akim@epita.fr> - - Use hash.h for the state hash table. - - * src/LR0.c (STATE_HASH_SIZE, state_hash): Remove. - (allocate_storage): Use state_hash_new. - (free_storage): Use state_hash_free. - (new_state, get_state): Adjust. - * src/lalr.h, src/lalr.c (states): Move to... - * src/states.h (state_t): Remove the `link' member, no longer - used. - * src/states.h, src/states.c: here. - (state_hash_new, state_hash_free, state_hash_lookup) - (state_hash_insert, states_free): New. - * src/states.c (state_table, state_compare, state_hash): New. - * src/output.c (output_actions): Do not free states now, since we - still need to know the final_state number in `prepare', called - afterwards. Do it... - * src/main.c (main): here: call states_free after `output'. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/state.h, src/state.c (state_new): New, extracted from... - * src/LR0.c (new_state): here. - * src/state.h (STATE_ALLOC): Move to... - * src/state.c: here. - * src/LR0.h, src/LR0.c (nstates, final_state): Move to... - * src/state.h, src/state.c: here. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/reader.c (gensym): Rename as... - * src/symtab.h, src/symtab.c (dummy_symbol_get): this. - (getsym): Rename as... - (symbol_get): this. - -2002-06-30 Akim Demaille <akim@epita.fr> - - * src/state.h (state_number_t, STATE_NUMBER_MAX): New. - * src/LR0.c, src/LR0.h, src/conflicts.c, src/lalr.c, src/lalr.h, - * src/output.c, src/print.c, src/print_graph.c: Propagate. - * src/LR0.h, src/LR0.h (final_state): Is a state_t*. - -2002-06-30 Akim Demaille <akim@epita.fr> - - Make the test suite pass with warnings checked. - - * tests/actions.at (Printers and Destructors): Improve. - Avoid unsigned vs. signed issues. - * tests/calc.at: Don't exercise the scanner here, do it... - * tests/input.at (Torturing the Scanner): here. - -2002-06-28 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * data/glr.c: Correct typo in Emacs-mode directive. Slightly - reorganize first lines parallel to yacc.c. - -2002-06-28 Akim Demaille <akim@epita.fr> - - * data/c.m4 (b4_copyright, b4_sint_type, b4_uint_type, b4_token_define) - (b4_token_enum, b4_token_defines): New, factored from... - * data/lalr1.cc, data/yacc.c, glr.c: here. - -2002-06-28 Akim Demaille <akim@epita.fr> - - * data/yacc.c (yydestruct, yysymprint): Pacify GCC warnings for - unused variables. - * src/output.c (merger_output): static. - -2002-06-28 Akim Demaille <akim@epita.fr> - - * src/reader.h: s/grammer_current_rule_merge_set/grammar_.../. - * src/conflicts.c (conflicts_total_count): `i' is unsigned, to - pacify GCC. - * src/output.c (save_row): Initialize all the variables to pacify GCC. - -2002-06-27 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - Accumulated changelog for new GLR parsing features. - - * src/conflicts.c (count_total_conflicts): Change name to - conflicts_total_count. - * src/conflicts.h: Ditto. - * src/output.c (token_actions): Use the new name. - (output_conflicts): Change conflp => conflict_list_heads, and - confl => conflict_list for better readability. - * data/glr.c: Use the new names. - * NEWS: Add self to GLR announcement. - - * src/reader.c (free_merger_functions): Cleanup: XFREE->free. - - * doc/bison.texinfo (GLR Parsers): Make corrections suggested by - Akim Demaille. - - * data/bison.glr: Change name to glr.c - * data/glr.c: Renamed from bison.glr. - * data/Makefile.am: Add glr.c - - * src/getargs.c: - - * src/symlist.h: Add dprec and merger fields to symbol_list_s. - * src/symlist.c (symbol_list_new): Initialize dprec and merger fields. - - Originally 2002-06-16 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * data/bison.glr: Be sure to restore the - current #line when returning to the skeleton contents after having - exposed the input file's #line. - - Originally 2002-06-13 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * data/bison.glr: Bring up to date with changes to bison.simple. - - Originally 2002-06-03 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * data/bison.glr: Correct definitions that use b4_prefix. - Various reformatting. - (GLRStack): Make yychar (in YYPURE case) and yytokenp as part of stack. - (yyreportParseError, yyrecoverParseError, yyprocessOneStack): remove - yytokenp argument; now part of stack. - (yychar): Define to behave as documented. - (yyclearin): Ditto. - - Originally 2002-05-14 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * src/reader.h: Add declaration for free_merger_functions. - - * src/reader.c (merge_functions): New variable. - (get_merge_function): New function. - (free_merger_functions): New function. - (readgram): Check for %prec that is not followed by a symbol. - Handle %dprec and %merge declarations. - (packgram): Initialize dprec and merger fields in rules array. - - * src/output.c (conflict_tos, conflrow, conflict_table, conflict_list, - conflict_list_cnt, conflict_list_free): New variables. - (table_grow): Also grow conflict_table. - (prepare_rules): Output dprec and merger tables. - (conflict_row): New function. - (action_row): Output conflict lists for GLR parser. Don't use - default reduction in conflicted states for GLR parser so that there - are spaces for the conflict lists. - (save_row): Also save conflict information. - (token_actions): Allocate conflict list. - (merger_output): New function. - (pack_vector): Pack conflict table, too. - (output_conflicts): New function to output yyconflp and yyconfl. - (output_check): Allocate conflict_tos. - (output_actions): Output conflict tables, also. - (output_skeleton): Output b4_mergers definition. - (prepare): Output b4_max_rhs_length definition. - Use 'bison.glr' as default skeleton for GLR parsers. - - * src/gram.c (glr_parser): New flag. - (grammar_free): Call free_merger_functions. - - * src/conflicts.c (count_rr_conflicts): Augment to optionally count - all pairs of conflicting reductions, rather than just all tokens - causing conflicts. Needed to size conflict tables. - (conflicts_output): Modify call to count_rr_conflicts for new - interface. - (conflicts_print): Ditto. - (count_total_conflicts): New function. - - * src/reader.h (merger_list): New type. - (merge_functions): New variable. - - * src/lex.h (tok_dprec, tok_merge): New token types. - - * src/gram.h (rule_s): Add dprec and merger fields. - (glr_parser): New flag. - - * src/conflicts.h (count_total_conflicts): New function. - - * src/options.c (option_table): Add %dprec, %merge, and %glr-parser. - - * doc/bison.texinfo (Generalized LR Parsing): New section. - (GLR Parsers): New section. - (Language and Grammar): Mention GLR parsing. - (Table of Symbols): Add %dprec, %glr-parser, %merge, GLR - Correct typo ("tge" -> "the"). - - * data/bison.glr: New skeleton for GLR parsing. - - * tests/cxx-gram.at: New tests for GLR parsing. - - * tests/testsuite.at: Include cxx-gram.at. - - * tests/Makefile.am: Add cxx-gram.at. - - * src/parse-gram.y: - - * src/scan-gram.l: Add %dprec, %glr-parser, %merge. - - * src/parse-gram.y: Grammar for %dprec, %merge, %glr-parser. - -2002-06-27 Akim Demaille <akim@epita.fr> - - * src/options.h, src/options.c: Remove. - * src/getargs.c (short_options, long_options): New. - -2002-06-27 Akim Demaille <akim@epita.fr> - - * data/bison.simple, data/bison.c++: Rename as... - * data/yacc.c, data/lalr1.cc: these. - * doc/bison.texinfo (Environment Variables): Remove. - -2002-06-25 Raja R Harinath <harinath@cs.umn.edu> - - * src/getargs.c (report_argmatch): Initialize strtok(). - -2002-06-20 Akim Demaille <akim@epita.fr> - - * data/bison.simple (b4_symbol_actions): New, replaces... - (b4_symbol_destructor, b4_symbol_printer): these. - (yysymprint): Be sure to call YYPRINT only for tokens, and using - user token numbers. - -2002-06-20 Akim Demaille <akim@epita.fr> - - * data/bison.simple (yydestructor): Rename as... - (yydestruct): this. - -2002-06-20 Akim Demaille <akim@epita.fr> - - * src/symtab.h, src/symtab.c (symbol_type_set) - (symbol_destructor_set, symbol_precedence_set): The location is - the last argument. - Adjust all callers. - -2002-06-20 Akim Demaille <akim@epita.fr> - - * src/parse-gram.y (YYPRINT, yyprint): Don't mess with the parser - internals. - * src/reader.h, src/reader.c (grammar_current_rule_prec_set): - Takes a location. - * src/symtab.h, src/symtab.c (symbol_class_set) - (symbol_user_token_number_set): Likewise. - Adjust all callers. - Promote complain_at. - * tests/input.at (Type Clashes): Adjust. - -2002-06-20 Akim Demaille <akim@epita.fr> - - * data/bison.simple (YYLEX): Fix the declaration when - %pure-parser. - -2002-06-20 Akim Demaille <akim@epita.fr> - - * data/bison.simple (yysymprint): Don't print the token number, - just its name. - * tests/actions.at (Destructors): Rename as... - (Printers and Destructors): this. - Also exercise %printer. - -2002-06-20 Akim Demaille <akim@epita.fr> - - * data/bison.simple (YYDSYMPRINT): New. - Use it to remove many of the #if YYDEBUG/if (yydebug). - -2002-06-20 Akim Demaille <akim@epita.fr> - - * src/symtab.h, src/symtab.c (symbol_t): printer and - printer_location are new members. - (symbol_printer_set): New. - * src/parse-gram.y (PERCENT_PRINTER): New token. - Handle its associated rule. - * src/scan-gram.l: Adjust. - (handle_destructor_at, handle_destructor_dollar): Rename as... - (handle_symbol_code_at, handle_symbol_code_dollar): these. - * src/output.c (symbol_printers_output): New. - (output_skeleton): Call it. - * data/bison.simple (yysymprint): New. Cannot be named yyprint - since there are already many grammar files with a user `yyprint'. - Replace the calls to YYPRINT to calls to yysymprint. - * tests/calc.at: Adjust. - * tests/torture.at (AT_DATA_STACK_TORTURE): Remove YYPRINT: it was - taking advantage of parser very internal details (stack size!). - -2002-06-20 Akim Demaille <akim@epita.fr> - - * src/scan-gram.l: Complete the scanner with the missing patterns - to pacify Flex. - Use `quote' and `symbol_tag_get' where appropriate. - -2002-06-19 Akim Demaille <akim@epita.fr> - - * tests/actions.at (Destructors): Augment to test locations. - * data/bison.simple (yydestructor): Pass it the current location - if locations are enabled. - Prototype only when __STDC__ or C++. - Change the argument names to move into the yy name space: there is - user code here. - -2002-06-19 Akim Demaille <akim@epita.fr> - - * data/bison.simple (b4_pure_if): New. - Use it instead of #ifdef YYPURE. - -2002-06-19 Akim Demaille <akim@epita.fr> - - * data/bison.simple (b4_location_if): New. - Use it instead of #ifdef YYLSP_NEEDED. - -2002-06-19 Akim Demaille <akim@epita.fr> - - Prepare @$ in %destructor, but currently don't bind it in the - skeleton, as %location use is not cleaned up yet. - - * src/scan-gram.l (handle_dollar, handle_destructor_at) - (handle_action_at): New. - (handle_at, handle_action_dollar, handle_destructor_dollar): Take - a braced_code_t and a location as additional arguments. - (handle_destructor_dollar): Instead of requiring `b4_eval', just - unquote one when outputting `b4_dollar_dollar'. - Adjust callers. - * data/bison.simple (b4_eval): Remove. - (b4_symbol_destructor): Adjust. - * tests/input.at (Invalid @n): Adjust. - -2002-06-19 Zack Weinberg <zack@codesourcery.com> - - * doc/bison.texinfo: Document ability to have multiple - prologue sections. - -2002-06-18 Akim Demaille <akim@epita.fr> - - * src/files.c (compute_base_names): When computing the output file - names from the input file name, strip the directory part. - -2002-06-18 Akim Demaille <akim@epita.fr> - - * data/bison.simple.new: Comment changes. - Reported by Andreas Schwab. - -2002-06-18 Matt Kraai <kraai@alumni.cmu.edu> - - * data/bison.simple (yyoverflowlab): #ifndef yyoverflow, so that - there are no `label `yyoverflowlab' defined but not used' warnings - when yyoverflow is defined. - -2002-06-18 Akim Demaille <akim@epita.fr> - - * src/symtab.h, src/symtab.c (symbol_t): destructor_location is a - new member. - (symbol_destructor_set): Adjust. - * src/output.c (symbol_destructors_output): Output the destructor - locations. - Output the symbol name. - * data/bison.simple (b4_symbol_destructor): Adjust. - -2002-06-18 Cris Bailiff <c.bailiff@awayweb.com> - and Akim Demaille <akim@epita.fr> - - * data/bison.simple.new (yyerrlab1): Be sure to pop and destroy - what's left on the stack when the error recovery hits EOF. - * tests/actions.at (Destructors): Complete to exercise this case. - -2002-06-17 Akim Demaille <akim@epita.fr> - - * data/m4sugar/m4sugar.m4 (m4_map): Recognize when the list of - arguments is really empty, not only equal to `[]'. - * src/symtab.h, src/symtab.c (symbol_t): `destructor' is a new - member. - (symbol_destructor_set): New. - * src/output.c (symbol_destructors_output): New. - * src/reader.h (brace_code_t, current_braced_code): New. - * src/scan-gram.l (BRACED_CODE): Use it to branch on... - (handle_dollar): Rename as... - (handle_action_dollar): this. - (handle_destructor_dollar): New. - * src/parse-gram.y (PERCENT_DESTRUCTOR): New. - (grammar_declaration): Use it. - * data/bison.simple (yystos): Is always defined. - (yydestructor): New. - * tests/actions.at (Destructors): New. - * tests/calc.at (_AT_CHECK_CALC_ERROR): Don't rely on egrep. - -2002-06-17 Akim Demaille <akim@epita.fr> - - * src/symlist.h, src/symlist.c (symbol_list_length): New. - * src/scan-gram.l (handle_dollar, handle_at): Compute the - rule_length only when needed. - * src/output.c (actions_output, token_definitions_output): Output - the full M4 block. - * src/symtab.c: Don't access directly to the symbol tag, use - symbol_tag_get. - * src/parse-gram.y: Use symbol_list_free. - -2002-06-17 Akim Demaille <akim@epita.fr> - - * src/reader.h, src/reader.c (symbol_list, symbol_list_new) - (symbol_list_prepend, get_type_name): Move to... - * src/symlist.h, src/symlist.c (symbol_list_t, symbol_list_new) - (symbol_list_prepend, symbol_list_n_type_name_get): here. - Adjust all callers. - (symbol_list_free): New. - * src/scan-gram.l (handle_dollar): Takes a location. - * tests/input.at (Invalid $n): Adjust. - -2002-06-17 Akim Demaille <akim@epita.fr> - - * src/reader.h, src/reader.c (symbol_list_new): Export it. - (symbol_list_prepend): New. - * src/parse-gram.y (%union): `list' is a new member. - (symbols.1): New, replaces... - (terms_to_prec.1, nterms_to_type.1): these. - * src/symtab.h, src/symtab.c (symbol_type_set, symbol_precedence_set) - Take a location as additional argument. - Adjust all callers. - -2002-06-15 Akim Demaille <akim@epita.fr> - - * src/parse-gram.y: Move %token in the declaration section so that - we don't depend upon CVS Bison. - -2002-06-15 Akim Demaille <akim@epita.fr> - - * src/state.h, src/state.c (state_rule_lookaheads_print): New. - * src/print.c (print_core): Use it. - -2002-06-15 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (log_resolution): Accept the rule involved in - the sr conflicts instead of the lookahead number that points to - that rule. - (flush_reduce): Accept the current lookahead vector as argument, - instead of the index in LA. - (resolve_sr_conflict): Accept the current number of lookahead - bitset to consider for the STATE, instead of the index in LA. - (set_conflicts): Adjust. - * src/lalr.c, src/lalr.h, src/state.h: Comment changes. - -2002-06-15 Akim Demaille <akim@epita.fr> - - * src/state.h (state_t): Replace the `lookaheadsp' member, a - short, with `lookaheads' (bitsetv), `lookaheads_rule' (rule_t**). - Adjust all dependencies. - * src/lalr.c (initialize_lookaheads): Split into... - (states_lookaheads_count, states_lookaheads_initialize): these. - (lalr): Adjust. - -2002-06-15 Akim Demaille <akim@epita.fr> - - * src/gram.h, src/gram.c (grammar_rules_partial_print): New, eved - out of... - (grammar_rules_print): here. - * src/reduce.c (reduce_output): Use it. - * tests/reduce.at (Useless Rules, Reduced Automaton) - (Underivable Rules): Adjust. - -2002-06-15 Akim Demaille <akim@epita.fr> - - Copy BYacc's nice way to report the grammar. - - * src/gram.h, src/gram.c (grammar_rhs_print, grammar_rules_print): - New. - Don't print the rules' location, it is confusing and useless. - (rule_print): Use grammar_rhs_print. - * src/print.c (print_grammar): Use grammar_rules_print. - -2002-06-15 Akim Demaille <akim@epita.fr> - - Complete and rationalize `useless thing' warnings. - - * src/symtab.h, src/symtab.c (symbol_tag_get, symbol_tag_get_n) - (symbol_tag_print): New. - Use them everywhere in place of accessing directly the tag member. - * src/gram.h, src/gram.c (rule_print): New. - Use it where a rule used to be printed `by hand'. - * src/reduce.c (nonterminals_reduce): Report the use nonterminals. - (reduce_grammar_tables): Report the useless rules. - (reduce_print): Useless things are a warning, not an error. - Report it as such. - * tests/reduce.at (Useless Nonterminals, Useless Rules): - (Reduced Automaton, Underivable Rules): Adjust. - * tests/regression.at (Web2c Report, Web2c Report): Adjust. - * tests/conflicts.at (Unresolved SR Conflicts) - (Solved SR Conflicts): Adjust. - -2002-06-15 Akim Demaille <akim@epita.fr> - - Let symbols have a location. - - * src/symtab.h, src/symtab.c (symbol_t): Location is a new member. - (getsym): Adjust. - Adjust all callers. - * src/complain.h, src/complain.c (complain_at, fatal_at, warn_at): - Use location_t, not int. - * src/symtab.c (symbol_check_defined): Take advantage of the - location. - * tests/regression.at (Invalid inputs): Adjust. - -2002-06-15 Akim Demaille <akim@epita.fr> - - * src/parse-gram.y (YYLLOC_DEFAULT, current_lhs_location): New. - (input): Don't try to initialize yylloc here, do it in the - scanner. - * src/scan-gram.l (YY_USER_INIT): Initialize yylloc. - * src/gram.h (rule_t): Change line and action_line into location - and action_location, of location_t type. - Adjust all dependencies. - * src/location.h, src/location.c (empty_location): New. - * src/reader.h, src/reader.c (grammar_start_symbol_set) - (grammar_symbol_append, grammar_rule_begin, grammar_rule_end) - (grammar_current_rule_symbol_append) - (grammar_current_rule_action_append): Expect a location as argument. - * src/reader.c (grammar_midrule_action): Adjust to attach an - action's location as dummy symbol location. - * src/symtab.h, src/symtab.c (startsymbol_location): New. - * tests/regression.at (Web2c Report, Rule Line Numbers): Adjust - the line numbers. - -2002-06-14 Akim Demaille <akim@epita.fr> - - Grammar declarations may be found in the grammar section. - - * src/parse-gram.y (rules_or_grammar_declaration): New. - (declarations): Each declaration may end with a semicolon, not - just... - (grammar_declaration): `"%union"'. - (grammar): Branch to rules_or_grammar_declaration. - -2002-06-14 Akim Demaille <akim@epita.fr> - - * src/main.c (main): Invoke scanner_free. - -2002-06-14 Akim Demaille <akim@epita.fr> - - * src/output.c (m4_invoke): Extracted from... - (output_skeleton): here. - Free tempfile. - -2002-06-14 Akim Demaille <akim@epita.fr> - - * src/parse-gram.y (directives, directive, gram) - (grammar_directives, precedence_directives, precedence_directive): - Rename as... - (declarations, declaration, grammar, grammar_declaration) - (precedence_declaration, precedence_declarator): these. - (symbol_declaration): New. - -2002-06-14 Akim Demaille <akim@epita.fr> - - * src/files.c (action_obstack): Remove, unused. - (output_obstack): Remove it, and all its dependencies, as it is no - longer needed. - * src/reader.c (epilogue_set): Build the epilogue in the - muscle_obstack. - * src/output.h, src/output.c (muscle_obstack): Move to... - * src/muscle_tab.h, src/muscle_tab.h: here. - (muscle_init): Initialize muscle_obstack. - (muscle_free): New. - * src/main.c (main): Call it. - -2002-06-14 Akim Demaille <akim@epita.fr> - - * src/location.h: New, extracted from... - * src/reader.h: here. - * src/Makefile.am (noinst_HEADERS): Merge into - (bison_SOURCES): this. - Add location.h. - * src/parse-gram.y: Use location_t instead of Bison's. - * src/reader.h, src/reader.c (prologue_augment, epilogue_set): - Use location_t instead of ints. - -2002-06-14 Akim Demaille <akim@epita.fr> - - * data/bison.simple, data/bison.c++: Be sure to restore the - current #line when returning to the skeleton contents after having - exposed the input file's #line. - -2002-06-12 Akim Demaille <akim@epita.fr> - - * src/scan-gram.l (SC_BRACED_CODE): Don't use `<.*>', it is too - eager. - * tests/actions.at (Exotic Dollars): New. - -2002-06-12 Akim Demaille <akim@epita.fr> - - * src/scan-gram.l (SC_PROLOGUE): Don't eat characters amongst - ['"/] too eagerly. - * tests/input.at (Torturing the Scanner): New. - -2002-06-11 Akim Demaille <akim@epita.fr> - - * src/scan-gram.l (YY_OBS_INIT): Remove, replace with... - [SC_COMMENT,SC_STRING,SC_CHARACTER,SC_BRACED_CODE,SC_PROLOGUE] - [SC_EPILOGUE]: Output the quadrigraphs only when not in a comment. - * src/reader.h, src/scan-gram.l (scanner_initialize): this. - * src/reader.c (reader): Use it. - -2002-06-11 Akim Demaille <akim@epita.fr> - - * src/scan-gram.l (YY_OBS_FINISH): Don't set yylval. - Adjust all callers. - (scanner_last_string_free): New. - -2002-06-11 Akim Demaille <akim@epita.fr> - - * src/scan-gram.l (YY_INIT, YY_GROW, YY_FINISH): Rename as... - (YY_OBS_INIT, YY_OBS_GROW, YY_OBS_FINISH): these. - (last_string, YY_OBS_FREE): New. - Use them when returning an ID. - -2002-06-11 Akim Demaille <akim@epita.fr> - - Have Bison grammars parsed by a Bison grammar. - - * src/reader.c, src/reader.h (prologue_augment): New. - * src/reader.c (copy_definition): Remove. - - * src/reader.h, src/reader.c (gram_start_symbol_set, prologue_augment) - (grammar_symbol_append, grammar_rule_begin, grammar_midrule_action) - (grammar_current_rule_prec_set, grammar_current_rule_check) - (grammar_current_rule_symbol_append) - (grammar_current_rule_action_append): Export. - * src/parse-gram.y (symbol_list_new, symbol_list_symbol_append_ - (symbol_list_action_append): Remove. - Hook the routines from reader. - * src/scan-gram.l: In INITIAL, characters and strings are tokens. - * src/system.h (ATTRIBUTE_NORETURN, ATTRIBUTE_UNUSED): Now. - - * src/reader.c (read_declarations): Remove, unused. - - * src/parse-gram.y: Handle the epilogue. - * src/reader.h, src/reader.c (gram_start_symbol_set): Rename as... - (grammar_start_symbol_set): this. - * src/scan-gram.l: Be sure to ``use'' yycontrol to keep GCC quiet. - * src/reader.c (readgram): Remove, unused. - (reader): Adjust to insert eoftoken and axiom where appropriate. - - * src/reader.c (copy_dollar): Replace with... - * src/scan-gram.h (handle_dollar): this. - * src/parse-gram.y: Remove `%thong'. - - * src/reader.c (copy_at): Replace with... - * src/scan-gram.h (handle_at): this. - - * src/complain.h, src/complain.c (warn_at, complain_at, fatal_at): - New. - - * src/scan-gram.l (YY_LINES): Keep lineno synchronized for the - time being. - - * src/reader.h, src/reader.c (grammar_rule_end): New. - - * src/parse.y (current_type, current_class): New. - Implement `%nterm', `%token' support. - Merge `%term' into `%token'. - (string_as_id): New. - * src/symtab.h, src/symtab.c (symbol_make_alias): Don't pass the - type name. - - * src/parse-gram.y: Be sure to handle properly the beginning of - rules. - - * src/parse-gram.y: Handle %type. - * src/reader.c (grammar_rule_end): Call grammar_current_rule_check. - - * src/parse-gram.y: More directives support. - * src/options.c: No longer handle source directives. - - * src/parse-gram.y: Fix %output. - - * src/parse-gram.y: Handle %union. - Use the prologue locations. - * src/reader.c (parse_union_decl): Remove. - - * src/reader.h, src/reader.c (epilogue_set): New. - * src/parse-gram.y: Use it. - - * data/bison.simple, data/bison.c++: b4_stype is now either not - defined, then default to int, or to the contents of %union, - without `union' itself. - Adjust. - * src/muscle_tab.c (muscle_init): Don't predefine `stype'. - - * src/output.c (actions_output): Don't output braces, as they are - already handled by the scanner. - - * src/scan-gram.l (SC_CHARACTER): Set the user_token_number of - characters to themselves. - - * tests/reduce.at (Reduced Automaton): End the grammars with %% so - that the epilogue has a proper #line. - - * src/parse-gram.y: Handle precedence/associativity. - - * src/symtab.c (symbol_precedence_set): Requires the symbol to be - a terminal. - * src/scan-gram.l (SC_BRACED_CODE): Catch strings and characters. - * tests/calc.at: Do not use `%token "foo"' as it makes not sense - at all to define terminals that cannot be emitted. - - * src/scan-gram.l: Escape M4 characters. - - * src/scan-gram.l: Working properly with escapes in user - strings/characters. - - * tests/torture.at (AT_DATA_TRIANGULAR_GRAMMAR) - (AT_DATA_HORIZONTAL_GRAMMAR): Respect the `%token ID NUM STRING' - grammar. - Use more modest sizes, as for the time being the parser does not - release memory, and therefore the process swallows a huge amount - of memory. - - * tests/torture.at (AT_DATA_LOOKAHEADS_GRAMMAR): Adjust to the - stricter %token grammar. - - * src/symtab.h (associativity): Add `undef_assoc'. - (symbol_precedence_set): Do nothing when passed an undef_assoc. - * src/symtab.c (symbol_check_alias_consistence): Adjust. - - * tests/regression.at (Invalid %directive): Remove, as it is now - meaningless. - (Invalid inputs): Adjust to the new error messages. - (Token definitions): The new grammar doesn't allow too many - eccentricities. - - * src/lex.h, src/lex.c: Remove. - * src/reader.c (lastprec, skip_to_char, read_signed_integer) - (copy_character, copy_string2, copy_string, copy_identifier) - (copy_comment, parse_token_decl, parse_type_decl, parse_assoc_decl) - (parse_muscle_decl, parse_dquoted_param, parse_skel_decl) - (parse_action): Remove. - * po/POTFILES.in: Adjust. - -2002-06-11 Akim Demaille <akim@epita.fr> - - * src/reader.c (parse_action): Don't store directly into the - rule's action member: return the action as a string. - Don't require `rule_length' as an argument: compute it. - (grammar_current_rule_symbol_append) - (grammar_current_rule_action_append): New, eved out from - (readgram): here. - Remove `action_flag', `rulelength', unused now. - -2002-06-11 Akim Demaille <akim@epita.fr> - - * src/reader.c (grammar_current_rule_prec_set). - (grammar_current_rule_check): New, eved out from... - (readgram): here. - Remove `xaction', `first_rhs': useless. - * tests/input.at (Type clashes): New. - * tests/existing.at (GNU Cim Grammar): Adjust. - -2002-06-11 Akim Demaille <akim@epita.fr> - - * src/reader.c (grammar_midrule_action): New, Eved out from - (readgram): here. - -2002-06-11 Akim Demaille <akim@epita.fr> - - * src/reader.c (grammar_rule_begin, previous_rule, current_rule): - New. - (readgram): Use them as replacement of inlined code, crule and - crule1. - -2002-06-11 Akim Demaille <akim@epita.fr> - - * src/reader.c (grammar_end, grammar_symbol_append): New. - (readgram): Use them. - Make the use of `p' as local as possible. - -2002-06-10 Akim Demaille <akim@epita.fr> - - GCJ's parser requires the tokens to be defined before the prologue. - - * data/bison.simple: Output the token definition before the user's - prologue. - * tests/regression.at (Braces parsing, Duplicate string) - (Mixing %token styles): Check the output from bison. - (Early token definitions): New. - -2002-06-10 Akim Demaille <akim@epita.fr> - - * src/symtab.c (symbol_user_token_number_set): Don't complain when - assigning twice the same user number to a token, so that we can - use it in... - * src/lex.c (lex): here. - Also use `symbol_class_set' instead of hand written code. - * src/reader.c (parse_assoc_decl): Likewise. - -2002-06-10 Akim Demaille <akim@epita.fr> - - * src/symtab.c, src/symtab.c (symbol_class_set) - (symbol_user_token_number_set): New. - * src/reader.c (parse_token_decl): Use them. - Use a switch instead of ifs. - Use a single argument. - -2002-06-10 Akim Demaille <akim@epita.fr> - - Remove `%thong' support as it is undocumented, unused, duplicates - `%token's job, and creates useless e-mail traffic with people who - want to know what it is, why it is undocumented, unused, and - duplicates `%token's job. - - * src/reader.c (parse_thong_decl): Remove. - * src/options.c (option_table): Remove "thong". - * src/lex.h (tok_thong): Remove. - -2002-06-10 Akim Demaille <akim@epita.fr> - - * src/symtab.c, src/symtab.c (symbol_type_set) - (symbol_precedence_set): New. - * src/reader.c (parse_type_decl, parse_assoc_decl): Use them. - (value_components_used): Remove, unused. - -2002-06-09 Akim Demaille <akim@epita.fr> - - Move symbols handling code out of the reader. - - * src/reader.h, src/reader.c (errtoken, undeftoken, eoftoken) - (axiom): Move to... - * src/symtab.h, src/symtab.c: here. - - * src/gram.c (start_symbol): Remove: use startsymbol->number. - * src/reader.c (startval): Rename as... - * src/symtab.h, src/symtab.c (startsymbol): this. - * src/reader.c: Adjust. - - * src/reader.c (symbol_check_defined, symbol_make_alias) - (symbol_check_alias_consistence, symbol_pack, symbol_translation) - (token_translations_init) - Move to... - * src/symtab.c: here. - * src/reader.c (packsymbols): Move to... - * src/symtab.h, src/symtab.c (symbols_pack): here. - * src/symtab.h, src/symtab.c (symbol_make_alias): Takes SYMVAL as - argument. - -2002-06-03 Akim Demaille <akim@epita.fr> - - * src/muscle_tab.c (muscle_insert, muscle_find): Declarations, - then statements. - -2002-06-03 Akim Demaille <akim@epita.fr> - - * src/muscle_tab.c (muscle_find, muscle_insert): Don't initialize - structs with non literals. - * src/scan-skel.l: never-interactive. - * src/conflicts.c (enum conflict_resolution_e): No trailing - comma. - * src/getargs.c (usage): Split long literal strings. - Reported by Hans Aberg. - -2002-05-28 Akim Demaille <akim@epita.fr> - - * data/bison.c++: Use C++ ostreams. - (cdebug_): New member. - -2002-05-28 Akim Demaille <akim@epita.fr> - - * src/output.c (output_skeleton): Be sure to allocate enough room - for `/' _and_ for `\0' in full_skeleton. - -2002-05-28 Akim Demaille <akim@epita.fr> - - * data/bison.c++: Catch up with bison.simple: - 2002-05-24 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - and Paul Eggert <eggert@twinsun.com>: `error' handing. - 2002-05-26 Akim Demaille <akim@epita.fr>: stos_, token_number_, - and popping traces. - -2002-05-27 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * src/output.c (output_skeleton): Put an explicit path in front of - the skeleton file name, rather than relying on the -I directory, - to partially alleviate effects of having a skeleton file lying around - in the current directory. - -2002-05-27 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * src/conflicts.c (log_resolution): Correct typo: - obstack_printf should be obstack_fgrow1. - -2002-05-26 Akim Demaille <akim@epita.fr> - - * src/state.h (state_t): `solved_conflicts' is a new member. - * src/LR0.c (new_state): Set it to 0. - * src/conflicts.h, src/conflicts.c (print_conflicts) - (free_conflicts, solve_conflicts): Rename as... - (conflicts_print, conflicts_free, conflicts_solve): these. - Adjust callers. - * src/conflicts.c (enum conflict_resolution_e) - (solved_conflicts_obstack): New, used by... - (log_resolution): this. - Adjust to attach the conflict resolution to each state. - Complete the description with the precedence/associativity - information. - (resolve_sr_conflict): Adjust. - * src/print.c (print_state): Output its solved_conflicts. - * tests/conflicts.at (Unresolved SR Conflicts) - (Solved SR Conflicts): Exercise --report=all. - -2002-05-26 Akim Demaille <akim@epita.fr> - - * src/LR0.c, src/derives.c, src/gram.c, src/gram.h, src/lalr.c, - * src/nullable.c, src/output.c, src/print.c, src/print_graph.c, - * src/reader.c, src/reduce.c, src/state.h, src/symtab.h - (token_number_t, item_number_as_token_number) - (token_number_as_item_number, muscle_insert_token_number_table): - Rename as... - (symbol_number_t, item_number_as_symbol_number) - (symbol_number_as_item_number, muscle_insert_symbol_number_table): - these, since it is more appropriate. - -2002-05-26 Akim Demaille <akim@epita.fr> - - * tests/calc.at (AT_CHECK_CALC): Adjust: there are now additional - `Error:' lines. - * data/bison.simple (yystos) [YYDEBUG]: New. - (yyparse) [YYDEBUG]: Display the symbols which are popped during - error recovery. - * tests/regression.at (Web2c Actions): Adjust: yystos is output now. - -2002-05-25 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Debugging): Split into... - (Tracing): this new section, its former contents, and... - (Understanding): this new section. - * src/getargs.h, src/getargs.c (verbose_flag): Remove, replaced - by... - (report_flag): this. - Adjust all dependencies. - (report_args, report_types, report_argmatch): New. - (usage, getargs): Report/support -r, --report. - * src/options.h - (struct option_table_struct): Rename as.., - (struct option_table_s): this. - Rename the `set_flag' member to `flag' to match with getopt_long's - struct. - * src/options.c (option_table): Split verbose into an entry for - %verbose, and another for --verbose. - Support --report/-r, so remove -r from the obsolete --raw. - * src/print.c: Attach full item sets and lookaheads reports to - report_flag instead of trace_flag. - * lib/argmatch.h, lib/argmatch.c: New, from Fileutils 4.1. - -2002-05-24 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - and Paul Eggert <eggert@twinsun.com> - - * data/bison.simple (yyparse): Correct error handling to conform to - POSIX and yacc. Specifically, after syntax error is discovered, - do not reduce further before shifting the error token. - Clean up the code a bit by removing the labels yyerrdefault, - yyerrhandle, yyerrpop. - * NEWS: Document the above. - -2002-05-20 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * data/bison.simple (yyr1): Don't use yy_token_number_type as element - type; it isn't always big enough, since it doesn't necessarily - include non-terminals. - (yytranslate): Expand definition of yy_token_number_type, so that - the latter can be removed. - (yy_token_number_type): Remove, only one use. - * data/bison.c++ (r1_): Parallel change to yyr1 in bison.simple--- - don't use TokenNumberType as element type. - - * tests/regression.at: Modify expected output to agree with change - to yyr1 and yytranslate. - -2002-05-13 Florian Krohm <florian@edamail.fishkill.ibm.com> - - * src/reader.c (parse_action): Use copy_character instead of - obstack_1grow. - -2002-05-13 Akim Demaille <akim@epita.fr> - - * tests/regression.at (Token definitions): Prototype yylex and - yyerror. - -2002-05-12 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU> - - * src/scan-skel.l: Correct off-by-one error in handling of __oline__. - * data/bison.simple (b4_sint_type, b4_uint_type): Correct to reflect - 32-bit arithmetic. - * data/bison.c++ (b4_sint_type, b4_uint_type): Ditto. - -2002-05-07 Akim Demaille <akim@epita.fr> - - * tests/synclines.at: Be sure to prototype yylex and yyerror to - avoid GCC warnings. - -2002-05-07 Akim Demaille <akim@epita.fr> - - Kill GCC warnings. - - * src/reduce.c (nonterminals_reduce): Don't loop over RITEM: loop - over the RHS of each rule. - * src/gram.h, src/gram.c (nritems): Is `unsigned int', not int. - * src/state.h (state_t): Member `nitems' is unsigned short. - * src/LR0.c (get_state): Adjust. - * src/reader.c (packgram): Likewise. - * src/output.c (GENERATE_MUSCLE_INSERT_TABLE): `max' is of type - `Type'. - (muscle_insert_int_table): Remove, unused. - (prepare_rules): Remove `max'. - -2002-05-06 Akim Demaille <akim@epita.fr> - - * src/closure.c (print_firsts): Display of the symbol tags. - (bitmatrix_print): Move to... - * lib/bitsetv-print.h, lib/bitsetv-print.c (bitsetv_matrix_dump): - here. - * tests/sets.at (Nullable, Broken Closure, Firsts): Adjust. - -2002-05-06 Akim Demaille <akim@epita.fr> - - * src/muscle_tab.c (muscle_m4_output): Must return TRUE for - hash_do_for_each. - -2002-05-06 Akim Demaille <akim@epita.fr> - - * src/LR0.c (new_state, get_state): Instead of using the global - `kernel_size' and `kernel_base', have two new arguments: - `core_size' and `core'. - Adjust callers. - -2002-05-06 Akim Demaille <akim@epita.fr> - - * src/reader.c (packgram): No longer end `ritem' with a 0 - sentinel: it is not used. - -2002-05-05 Akim Demaille <akim@epita.fr> - - New experimental feature: display the lookaheads in the report and - graph. - - * src/print (print_core): When --trace-flag, display the rules - lookaheads. - * src/print_graph.c (print_core): Likewise. - Swap the arguments. - Adjust caller. - -2002-05-05 Akim Demaille <akim@epita.fr> - - * tests/torture.at (Many lookaheads): New test. - -2002-05-05 Akim Demaille <akim@epita.fr> - - * src/output.c (GENERATE_OUTPUT_TABLE): Replace with... - (GENERATE_MUSCLE_INSERT_TABLE): this. - (output_int_table, output_unsigned_int_table, output_short_table) - (output_token_number_table, output_item_number_table): Replace with... - (muscle_insert_int_table, muscle_insert_unsigned_int_table) - (muscle_insert_short_table, muscle_insert_token_number_table) - (muscle_insert_item_number_table): these. - Adjust all callers. - (prepare_tokens): Don't free `translations', since... - * src/reader.h, src/reader.c (grammar_free): do it. - Move to... - * src/gram.h, src/gram.c (grammar_free): here. - * data/bison.simple, data/bison.c++: b4_token_number_max is now - b4_translate_max. - -2002-05-05 Akim Demaille <akim@epita.fr> - - * src/output.c (output_unsigned_int_table): New. - (prepare_rules): `i' is unsigned. - `prhs', `rline', `r2' are unsigned int. - Rename muscle `rhs_number_max' as `rhs_max'. - Output muscles `prhs_max', `rline_max', and `r2_max'. - Free rline and r1. - * data/bison.simple, data/bison.c++: Adjust to use these muscles - to compute types instead of constant types. - * tests/regression.at (Web2c Actions): Adjust. - -2002-05-04 Akim Demaille <akim@epita.fr> - - * src/symtab.h (SALIAS, SUNDEF): Rename as... - (USER_NUMBER_ALIAS, USER_NUMBER_UNDEFINED): these. - Adjust dependencies. - * src/output.c (token_definitions_output): Be sure not to output a - `#define 'a'' when fed with `%token 'a' "a"'. - * tests/regression.at (Token definitions): New. - -2002-05-03 Paul Eggert <eggert@twinsun.com> - - * data/bison.simple (b4_token_defines): Also define YYTOKENTYPE - for K&R C. - -2002-05-03 gettextize <bug-gnu-gettext@gnu.org> - - * Makefile.am (SUBDIRS): Remove intl. - (EXTRA_DIST): Add config/config.rpath. - -2002-05-03 Akim Demaille <akim@epita.fr> - - * data/bison.simple (m4_if): Don't output empty enums. - And actually, output valid enum definitions :(. - -2002-05-03 Akim Demaille <akim@epita.fr> - - * configure.bat: Remove, completely obsolete. - * Makefile.am (EXTRA_DIST): Adjust. - Don't distribute config.rpath... - * config/Makefile.am (EXTRA_DIST): Do it. - -2002-05-03 Akim Demaille <akim@epita.fr> - - * configure.in (GETTEXT_VERSION): New. - Suggested by Bruno Haible for the forthcoming Gettext 0.10.3. - -2002-05-03 Akim Demaille <akim@epita.fr> - - * data/bison.simple (b4_token_enum): New. - (b4_token_defines): Use it to output tokens both as #define and - enums. - Suggested by Paul Eggert. - * src/output.c (token_definitions_output): Don't output spurious - white spaces. - -2002-05-03 Akim Demaille <akim@epita.fr> - - * data/m4sugar/m4sugar.m4: Update from CVS Autoconf. - -2002-05-02 Robert Anisko <robert@lrde.epita.fr> - - * data/bison.c++: Adapt expansion of $s and @s to the C++ parser. - Update the stack class, give a try to deque as the default container. - -2002-05-02 Akim Demaille <akim@epita.fr> - - * data/bison.simple (yyparse): Do not implement @$ = @1. - (YYLLOC_DEFAULT): Adjust to do it. - * doc/bison.texinfo (Location Default Action): Fix. - -2002-05-02 Akim Demaille <akim@epita.fr> - - * src/reader.c (parse_braces): Merge into... - (parse_action): this. - -2002-05-02 Akim Demaille <akim@epita.fr> - - * configure.in (ALL_LINGUAS): Remove. - * po/LINGUAS, hr.po: New. - -2002-05-02 Akim Demaille <akim@epita.fr> - - Remove the so called hairy (semantic) parsers. - - * src/system.h (EXT_GUARD_C, EXT_STYPE_H): Remove. - * src/gram.h, src/gram.c (semantic_parser): Remove. - (rule_t): Remove the guard and guard_line members. - * src/lex.h (token_t): remove tok_guard. - * src/options.c (option_table): Remove %guard and %semantic_parser - support. - * src/output.c, src/output.h (guards_output): Remove. - (prepare): Adjust. - (token_definitions_output): Don't output the `T' - tokens (???). - (output_skeleton): Don't output the guards. - * src/files.c, src/files.c (attrsfile): Remove. - * src/reader.c (symbol_list): Remove the guard and guard_line - members. - Adjust dependencies. - (parse_guard): Remove. - * data/bison.hairy: Remove. - * doc/bison.texinfo (Environment Variables): Remove occurrences of - BISON_HAIRY. - -2002-05-02 Akim Demaille <akim@epita.fr> - - * src/reader.c (copy_at, copy_dollarm parse_braces, parse_action) - (parse_guard): Rename the formal argument `stack_offset' as - `rule_length', which is more readable. - Adjust callers. - (copy_at, copy_dollar): Instead of outputting the hard coded - values of $$, $n and so forth, output invocation to b4_lhs_value, - b4_lhs_location, b4_rhs_value, and b4_rhs_location. - Note: this patch partially drops `semantic-parser' support: it - always does `rule_length - n', where semantic parsers ought to - always use `-n'. - * data/bison.simple, data/bison.c++ (b4_lhs_value) - (b4_lhs_location, b4_rhs_value, and b4_rhs_location: New. - -2002-05-02 Akim Demaille <akim@epita.fr> - - * configure.in (AC_INIT): Bump to 1.49b. - (AM_INIT_AUTOMAKE): Short invocation. - -2002-05-02 Akim Demaille <akim@epita.fr> - - Version 1.49a. - -2002-05-01 Akim Demaille <akim@epita.fr> - - * src/skeleton.h: Remove. - -2002-05-01 Akim Demaille <akim@epita.fr> - - * src/skeleton.h: Fix the #endif. - Reported by Magnus Fromreide. - -2002-04-26 Paul Eggert <eggert@twinsun.com> - - * data/bison.simple (YYSTYPE_IS_TRIVIAL, YYLTYPE_IS_TRIVIAL): - Define if we define YYSTYPE and YYLTYPE, respectively. - (YYCOPY): Fix [] quoting problem in the non-GCC case. - -2002-04-25 Robert Anisko <robert@lrde.epita.fr> - - * src/scan-skel.l: Postprocess quadrigraphs. - - * src/reader.c (copy_character): New function, used to output - single characters while replacing `[' and `]' with quadrigraphs, to - avoid troubles with M4 quotes. - (copy_comment): Output characters with copy_character. - (read_additionnal_code): Likewise. - (copy_string2): Likewise. - (copy_definition): Likewise. - - * tests/calc.at: Exercise M4 quoting. - -2002-04-25 Akim Demaille <akim@epita.fr> - - * tests/sets.at (AT_EXTRACT_SETS): Sed portability issue: no space - between `!' and the command. - Reported by Paul Eggert. - -2002-04-24 Robert Anisko <robert@lrde.epita.fr> - - * tests/calc.at: Exercise prologue splitting. - - * data/bison.simple, data/bison.c++: Use `b4_pre_prologue' and - `b4_post_prologue' instead of `b4_prologue'. - - * src/output.c (prepare): Add the `pre_prologue' and `post_prologue' - muscles. - (output): Free pre_prologue_obstack and post_prologue_obstack. - * src/files.h, src/files.c (attrs_obstack): Remove. - (pre_prologue_obstack, post_prologue_obstack): New. - * src/reader.c (copy_definition): Add a parameter to specify the - obstack to fill, instead of using attrs_obstack unconditionally. - (read_declarations): Pass pre_prologue_obstack to copy_definition if - `%union' has not yet been seen, pass post_prologue_obstack otherwise. - -2002-04-23 Paul Eggert <eggert@twinsun.com> - - * data/bison.simple: Remove unnecessary commentary and white - space differences from 1_29-branch. - Depend on YYERROR_VERBOSE, not defined (YYERROR_VERBOSE). - - (union yyalloc, YYSTACK_GAP_MAX, YYSTACK_BYTES, YYCOPY, - YYSTACK_RELOCATE): Do not define if yyoverflow is defined, or - if this is a C++ parser and YYSTYPE or YYLTYPE has nontrivial - constructors or destructors. - - (yyparse) [! defined YYSTACK_RELOCATE]: Do not relocate the stack. - -2002-04-23 Akim Demaille <akim@epita.fr> - - * tests/sets.at (AT_EXTRACT_SETS): Don't use 8 char long sed labels. - * tests/synclines.at (AT_TEST_SYNCLINE): Be robust to GCC's - location with columns. - * tests/conflicts.at (%nonassoc and eof): Don't use `error.h'. - All reported by Paul Eggert. - -2002-04-22 Akim Demaille <akim@epita.fr> - - * src/reduce.c (dump_grammar): Move to... - * src/gram.h, src/gram.c (grammar_dump): here. - Be sure to separate long item numbers. - Don't read the members of a rule's prec if its nil. - -2002-04-22 Akim Demaille <akim@epita.fr> - - * src/output.c (table_size, table_grow): New. - (MAXTABLE): Remove, replace uses with table_size. - (pack_vector): Instead of dying when the table is too big, grow it. - -2002-04-22 Akim Demaille <akim@epita.fr> - - * data/bison.simple (yyr1): Its type is that of a token number. - * data/bison.c++ (r1_): Likewise. - * tests/regression.at (Web2c Actions): Adjust. - -2002-04-22 Akim Demaille <akim@epita.fr> - - * src/reader.c (token_translations_init): 256 is now the default - value for the error token, i.e., it will be assigned another - number if the user assigned 256 to one of her tokens. - (reader): Don't force 256 to error. - * doc/bison.texinfo (Symbols): Adjust. - * tests/torture.at (AT_DATA_HORIZONTAL_GRAMMAR) - (AT_DATA_TRIANGULAR_GRAMMAR): Number the tokens as 1, 2, 3 - etc. instead of 10, 20, 30 (which was used to `jump' over error - (256) and undefined (2)). - -2002-04-22 Akim Demaille <akim@epita.fr> - - Propagate more token_number_t. - - * src/gram.h (token_number_as_item_number) - (item_number_as_token_number): New. - * src/output.c (GENERATE_OUTPUT_TABLE): New. - Use it to create output_item_number_table and - output_token_number_table. - * src/LR0.c, src/derives.c, src/gram.c, src/gram.h, src/lalr.c, - * src/lex.c, src/nullable.c, src/output.c, src/print.c, - * src/print_graph.c, src/reader.c, src/reduce.c, src/state.h, - * src/symtab.c, src/symtab.h: Use token_number_t instead of shorts. - -2002-04-22 Akim Demaille <akim@epita.fr> - - * src/output.h, src/output.c (get_lines_number): Remove. - -2002-04-19 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Actions): Make clear that `|' is not the same - as Lex/Flex'. - (Debugging): More details about enabling the debugging features. - (Table of Symbols): Describe $$, $n, @$, and @n. - Suggested by Tim Josling. - -2002-04-19 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo: Remove the uses of the obsolete @refill. - -2002-04-10 Akim Demaille <akim@epita.fr> - - * src/system.h: Rely on HAVE_LIMITS_H. - Suggested by Paul Eggert. - -2002-04-09 Akim Demaille <akim@epita.fr> - - * tests/calc.at (_AT_CHECK_CALC_ERROR): Receive as argument the - full stderr, and strip it according to the bison options, instead - of composing the error message from different bits. - This makes it easier to check for several error messages. - Adjust all the invocations. - Add an invocation exercising the error token. - Add an invocation demonstrating a stupid error message. - (_AT_DATA_CALC_Y): Follow the GCS: initial column is 1, not 0. - Adjust the tests. - Error message are for stderr, not stdout. - -2002-04-09 Akim Demaille <akim@epita.fr> - - * src/gram.h, src/gram.c (error_token_number): Remove, use - errtoken->number. - * src/reader.c (reader): Don't specify the user token number (2) - for $undefined, as it uselessly prevents using it. - * src/gram.h (token_number_t): Move to... - * src/symtab.h: here. - (state_t.number): Is a token_number_t. - * src/print.c, src/reader.c: Use undeftoken->number instead of - hard coded 2. - (Even though this 2 is not the same as above: the number of the - undeftoken remains being 2, it is its user token number which - might not be 2). - * src/output.c (prepare_tokens): Rename the `maxtok' muscle with - `user_token_number_max'. - Output `undef_token_number'. - * data/bison.simple, data/bison.c++: Use them. - Be sure to map invalid yylex return values to - `undef_token_number'. This saves us from gratuitous SEGV. - - * tests/conflicts.at (Solved SR Conflicts) - (Unresolved SR Conflicts): Adjust. - * tests/regression.at (Web2c Actions): Adjust. - -2002-04-08 Akim Demaille <akim@epita.fr> - - * data/bison.c++: s/b4_item_number_max/b4_rhs_number_max/. - Adding #line. - Remove the duplicate `typedefs'. - (RhsNumberType): Fix the declaration and various other typos. - Use __ofile__. - * data/bison.simple: Use __ofile__. - * src/scan-skel.l: Handle __ofile__. - -2002-04-08 Akim Demaille <akim@epita.fr> - - * src/gram.h (item_number_t): New, the type of item numbers in - RITEM. Note that it must be able to code symbol numbers as - positive number, and the negation of rule numbers as negative - numbers. - Adjust all dependencies (pretty many). - * src/reduce.c (rule): Remove this `short *' pointer: use - item_number_t. - * src/system.h (MINSHORT, MAXSHORT): Remove. - Include `limits.h'. - Adjust dependencies to using SHRT_MAX and SHRT_MIN. - (shortcpy): Remove. - (MAXTABLE): Move to... - * src/output.c (MAXTABLE): here. - (prepare_rules): Use output_int_table to output rhs. - * data/bison.simple, data/bison.c++: Adjust. - * tests/torture.at (Big triangle): Move the limit from 254 to - 500. - * tests/regression.at (Web2c Actions): Ajust. - - Trying with bigger grammars shows various phenomena: at 3000 (28Mb - of grammar file) bison is killed by my system, at 2000 (12Mb) bison - passes, but produces negative #line number, once fixed, GCC is - killed while compiling 14Mb, at 1500 (6.7 Mb of grammar, 8.2Mb of - C), it passes. - * src/state.h (state_h): Code input lines on ints, not shorts. - -2002-04-08 Akim Demaille <akim@epita.fr> - - * src/reduce.c (reduce_grammar): First reduce the nonterminals, - and then the grammar. - -2002-04-08 Akim Demaille <akim@epita.fr> - - * src/system.h: No longer using strndup. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/muscle_tab.h (MUSCLE_INSERT_LONG_INT): New. - * src/output.c (output_table_data): Return the longest number. - (prepare_tokens): Output `token_number_max'). - * data/bison.simple, data/bison.c++ (b4_sint_type, b4_uint_type): - New. - Use them to define yy_token_number_type/TokenNumberType. - Use this type for yytranslate. - * tests/torture.at (Big triangle): Push the limit from 124 to - 253. - * tests/regression.at (Web2c Actions): Adjust. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * tests/torture.at (Big triangle): New. - (GNU AWK Grammar, GNU Cim Grammar): Move to... - * tests/existing.at: here. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/gram.h, src/gram.c (nitems): Remove, it is an alias of - nritems. - Adjust dependencies. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/reader.c: Normalize increments to prefix form. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/reader.c, symtab.c: Remove debugging code. - -2002-04-07 Akim Demaille <akim@epita.fr> - - Rename all the `bucket's as `symbol_t'. - - * src/gram.c, src/gram.h, src/lex.c, src/lex.h, src/output.c, - * src/reader.c, src/reader.h, src/reduce.c, src/state.h, - * src/symtab.c, src/symtab.h (bucket): Rename as... - (symbol_t): this. - (symbol_list_new, bucket_check_defined, bucket_make_alias) - (bucket_check_alias_consistence, bucket_pack, bucket_translation) - (bucket_new, bucket_free, hash_compare_bucket, hash_bucket) - (buckets_new, buckets_free, buckets_do): Rename as... - (symbol_list_new, symbol_check_defined, symbol_make_alias) - (symbol_check_alias_consistence, symbol_pack, symbol_translation) - (symbol_new, symbol_free, hash_compare_symbol_t, hash_symbol_t) - (symbols_new, symbols_free, symbols_do): these. - -2002-04-07 Akim Demaille <akim@epita.fr> - - Use lib/hash for the symbol table. - - * src/gram.c (ntokens): Initialize to 1, to reserve a slot for - EOF. - * src/lex.c (lex): Set the `number' member of new terminals. - * src/reader.c (bucket_check_defined, bucket_make_alias) - (bucket_check_alias_consistence, bucket_translation): New. - (reader, grammar_free, readgram, token_translations_init) - (packsymbols): Adjust. - (reader): Number the predefined tokens. - * src/reduce.c (inaccessable_symbols): Just use hard coded numbers - for predefined tokens. - * src/symtab.h (bucket): Remove all the hash table related - members. - * src/symtab.c (symtab): Replace by... - (bucket_table): this. - (bucket_new, bucket_free, hash_compare_bucket, hash_bucket) - (buckets_new, buckets_do): New. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/gram.c (nitems, nrules, nsyms, ntokens, nvars, nritems) - (start_symbol, max_user_token_number, semantic_parser) - (error_token_number): Initialize. - * src/reader.c (grammar, start_flag, startval, typed, lastprec): - Initialize. - (reader): Don't. - (errtoken, eoftoken, undeftoken, axiom): Extern. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/gram.h (rule_s): prec and precsym are now pointers - to the bucket giving the priority/associativity. - Member `associativity' removed: useless. - * src/reduce.c, src/conflicts.c: Adjust. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/lalr.c, src/LR0.c, src/closure.c, src/gram.c, src/reduce.c: - Properly escape the symbols' TAG when outputting them. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/lalr.h (LA): Is a bitsetv, not bitset*. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/lalr.h, src/lalr.c (LAruleno): Replace with... - (LArule): this, which is an array to rule_t*. - * src/print.c, src/conflicts.c: Adjust. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/gram.h (rule_t): Rename `number' as `user_number'. - `number' is a new member. - Adjust dependencies. - * src/reduce.c (reduce_grammar_tables): Renumber rule_t.number. - -2002-04-07 Akim Demaille <akim@epita.fr> - - As a result of the previous patch, it is no longer needed - to reorder ritem itself. - - * src/reduce.c (reduce_grammar_tables): Don't sort RITEM. - -2002-04-07 Akim Demaille <akim@epita.fr> - - Be sure never to walk through RITEMS, but use only data related to - the rules themselves. RITEMS should be banished. - - * src/output.c (output_token_translations): Rename as... - (prepare_tokens): this. - In addition to `translate', prepare the muscles `tname' and - `toknum', which were handled by... - (output_rule_data): this. - Remove, and move the remainder of its outputs into... - (prepare_rules): this new routines, which also merges content from - (output_gram): this. - (prepare_rules): Be sure never to walk through RITEMS. - (output_stos): Rename as... - (prepare_stos): this. - (output): Always invoke prepare_states, after all, just don't use it - in the output if you don't need it. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/LR0.c (new_state): Display `nstates' as the name of the - newly created state. - Adjust to initialize first_state and last_state if needed. - Be sure to distinguish the initial from the final state. - (new_states): Create the itemset of the initial state, and use - new_state. - * src/closure.c (closure): Now that the initial state has its - items properly set, there is no need for a special case when - creating `ruleset'. - - As a result, now the rule 0, reducing to $axiom, is visible in the - outputs. Adjust the test suite. - - * tests/conflicts.at (Solved SR Conflicts) - (Unresolved SR Conflicts): Adjust. - * tests/regression.at (Web2c Report, Rule Line Numbers): Idem. - * tests/conflicts.at (S/R in initial): New. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/LR0.c (allocate_itemsets): Don't loop over ritem: loop over - the RHS of the rules. - * src/output.c (output_gram): Likewise. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/gram.h (rule_t): `lhs' is now a pointer to the symbol's - bucket. - Adjust all dependencies. - * src/reduce.c (nonterminals_reduce): Don't forget to renumber the - `number' of the buckets too. - * src/gram.h: Include `symtab.h'. - (associativity): Move to... - * src/symtab.h: here. - No longer include `gram.h'. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/gram.h, src/gram.c (rules_rhs_length): New. - (ritem_longest_rhs): Use it. - * src/gram.h (rule_t): `number' is a new member. - * src/reader.c (packgram): Set it. - * src/reduce.c (reduce_grammar_tables): Move the useless rules at - the end of `rules', and count them out of `nrules'. - (reduce_output, dump_grammar): Adjust. - * src/print.c (print_grammar): It is no longer needed to check for - the usefulness of a rule, as useless rules are beyond `nrules + 1'. - * tests/reduce.at (Reduced Automaton): New test. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/reduce.c (inaccessable_symbols): Fix a buglet: because of a - lacking `+ 1' to nrules, Bison reported as useless a token if it - was used solely to set the precedence of the last rule... - -2002-04-07 Akim Demaille <akim@epita.fr> - - * data/bison.c++, data/bison.simple: Don't output the current file - name in #line, to avoid useless diffs between two identical - outputs under different names. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/closure.c, src/print.c, src/reader.c, src/reduce.c: - Normalize loops to using `< nrules + 1', not `<= nrules'. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * TODO: Update. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/output.c, src/reader.c, src/symtab.c, src/symtab.h: Rename - bucket.value as bucket.number. - -2002-04-07 Akim Demaille <akim@epita.fr> - - * src/closure.c, src/derives.c, src/gram.h, src/lalr.c, - * src/nullable.c, src/output.c, src/print.c, src/print_graph.c, - * src/reader.c, src/reduce.c: Let rule_t.rhs point directly to the - RHS, instead of being an index in RITEMS. - -2002-04-04 Paul Eggert <eggert@twinsun.com> - - * doc/bison.texinfo: Update copyright date. - (Rpcalc Lexer, Symbols, Token Decl): Don't assume ASCII. - (Symbols): Warn about running Bison in one character set, - but compiling and/or running in an incompatible one. - Warn about character code 256, too. - -2002-04-03 Paul Eggert <eggert@twinsun.com> - - * src/bison.data (YYSTACK_ALLOC): Depend on whether - YYERROR_VERBOSE is nonzero, not whether it is defined. - - Merge changes from bison-1_29-branch. - -2002-03-20 Paul Eggert <eggert@twinsun.com> - - Merge fixes from Debian bison_1.34-1.diff. - - * configure.in (AC_PREREQ): 2.53. - -2002-03-20 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (log_resolution): Argument `resolution' is const. - -2002-03-19 Paul Eggert <eggert@twinsun.com> - - * src/bison.simple (YYCOPY): New macro. - (YYSTACK_RELOCATE): Use it. - Remove Type arg; no longer needed. All callers changed. - (yymemcpy): Remove; no longer needed. - - * Makefile.am (AUTOMAKE_OPTIONS): 1.6. - * doc/Makefile.am (AUTOMAKE_OPTIONS): Remove. - -2002-03-19 Akim Demaille <akim@epita.fr> - - Test and fix the #line outputs. - - * tests/atlocal.at (GCC): New. - * tests/synclines.at (AT_TEST_SYNCLINE): New macro. - (Prologue synch line, %union synch line, Postprologue synch line) - (Action synch line, Epilogue synch line): New tests. - * src/reader.c (parse_union_decl): Define the muscle stype_line. - * data/bison.simple, data/bison.c++: Use it. - -2002-03-19 Akim Demaille <akim@epita.fr> - - * tests/regression.at (%nonassoc and eof, Unresolved SR Conflicts) - (Solved SR Conflicts, %expect not enough, %expect right) - (%expect too much): Move to... - * tests/conflicts.at: this new file. - -2002-03-19 Akim Demaille <akim@epita.fr> - - * data/m4sugar/m4sugar.m4: Update from CVS Autoconf. - * data/bison.simple, data/bison.c++: Handle the `#define' part, so - that we can move to enums for instance. - * src/output.c (token_definitions_output): Output a list of - `token-name, token-number' instead of the #define. - (output_skeleton): Name this list `b4_tokens', not `b4_tokendefs'. - -2002-03-14 Akim Demaille <akim@epita.fr> - - Use Gettext 0.11.1. - -2002-03-09 Robert Anisko <robert@lrde.epita.fr> - - * data/bison.c++: Make the user able to add members to the generated - parser by subclassing. - -2002-03-05 Robert Anisko <robert@lrde.epita.fr> - - * src/reader.c (read_additionnal_code): `c' should be an integer, not - a character. - Reported by Nicolas Tisserand and Nicolas Burrus. - -2002-03-04 Robert Anisko <robert@lrde.epita.fr> - - * src/reader.c: Warn about lacking semi-colons, do not complain. - -2002-03-04 Robert Anisko <robert@lrde.epita.fr> - - * data/bison.c++: Remove a debug line. - -2002-03-04 Robert Anisko <robert@lrde.epita.fr> - - * data/bison.c++: Unmerge value as yylval and value as yyval. Unmerge - location as yylloc and location as yyloc. Use YYLLOC_DEFAULT, and - provide a default implementation. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * tests/input.at (Invalid $n, Invalid @n): Add the ending `;'. - * tests/output.at (AT_CHECK_OUTPUT): Likewise. - * tests/headers.at (AT_TEST_CPP_GUARD_H): Ditto. - * tests/semantic.at (Parsing Guards): Similarly. - * src/reader.at (readgram): Complain if the last rule is not ended - with a semi-colon. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/warshall.h, src/warshall.c (bitmatrix_print): Move to... - * src/closure.c: here. - (set_firsts): Use bitsetv_reflexive_transitive_closure instead of - RTC. - * src/warshall.h, src/warshall.c: Remove. - * tests/sets.at (Broken Closure): Adjust. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/output.c (output_skeleton): tempdir is const. - bytes_read is unused. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * lib/bbitset.h, lib/bitset.c, lib/bitset.h, lib/bitsetv.c, - * lib/bitsetv.h, lib/ebitset.c, lib/lbitset.c, lib/sbitset.c: - Update. - From Michael Hayes. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/closure.c (closure): `r' is unused. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * tests/sets.at (Broken Closure): Add the ending `;'. - * src/reader.at (readgram): Complain if a rule is not ended with a - semi-colon. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (set_conflicts): Use bitset_disjoint_p. - (count_sr_conflicts): Use bitset_count. - * src/reduce.c (inaccessable_symbols): Ditto. - (bits_size): Remove. - * src/warshall.h, src/warshall.c: Convert to bitsetv. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/closure.c, src/conflicts.c, src/lalr.c, src/print.c, - * src/reduce.c: Remove the `bitset_zero's following the - `bitset_create's, as now it is performed by the latter. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * lib/bitset.c, lib/bitset.h, lib/bitsetv.c, lib/bitsetv.h, - * lib/ebitset.c, lib/ebitset.h, lib/lbitset.c, lib/lbitset.h, - * lib/sbitset.c, lib/sbitset.h, lib/bbitset.h: Update from the - latest sources from Michael. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/output.c (output): Don't free the grammar. - * src/reader.c (grammar_free): New. - * src/main.c (main): Call it and don't free symtab here. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/lex.c (parse_percent_token): Be sure to 0-end token_buffer - before returning. - Reported by Benoit Perrot. - -2002-03-04 Akim Demaille <akim@epita.fr> - - Use bitset operations when possible, not loops over bits. - - * src/conflicts.c (set_conflicts, count_sr_conflicts): Use - bitset_or. - * src/print.c (print_reductions): Use bitset_and, bitset_andn. - * src/reduce.c (useless_nonterminals): Formatting changes. - * src/warshall.c (TC): Use bitset_or. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/lalr.h, src/lalr.c (tokensetsize): Remove, unused. - * src/system.h (BITS_PER_WORD, WORDSIZE, SETBIT, RESETBIT, BITISSET): - Ditto. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/lalr.c (F): Now a bitset*. - Adjust all dependencies. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (shiftset, lookaheadset): Now bitset. - Adjust all dependencies. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/L0.c, src/LR0.h (nstates): Be size_t. - Adjust comparisons (signed vs unsigned). - * src/conflics.c, src/lalr.c, src/lalr.h, src/output.c (LA): Now a - bitset*. - Adjust all dependencies. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/closure.c (firsts): Now, also a bitset. - Adjust all dependencies. - (varsetsize): Remove, now unused. - * src/warshall.h, src/warshall.c: Now work on arrays of bitsets. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/print.c: Convert to use bitset.h, not hand coded iterations - over ints. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/reduce.c: Convert to use bitset.h, not hand coded BSet. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * src/closure.c (ruleset): Be a bitset. - (rulesetsize): Remove. - -2002-03-04 Akim Demaille <akim@epita.fr> - - * lib/bitset-int.h, lib/bitset.c, lib/bitset.h, lib/bitsetv.c, - * lib/bitsetv.h, lib/ebitset.c, lib/ebitset.h, lib/lbitset.c, - * lib/lbitset.h, lib/sbitset.c, lib/sbitset.h: New. - * src/closure.c (fderives): Be an array of bitsets. - -2002-02-28 Robert Anisko <robert@lrde.epita.fr> - - * data/bison.c++: Merge the two generated headers. Insert a copyright - notice in each output file. - -2002-02-28 Akim Demaille <akim@epita.fr> - - * data/bison.c++: Copy the prologue of bison.simple to fetch - useful M4 definitions, such as b4_header_guard. - -2002-02-25 Akim Demaille <akim@epita.fr> - - * src/getargs.c (version): Give the name of the authors, and use a - translator friendly scheme for the bgr - copyright notice. - -2002-02-25 Akim Demaille <akim@epita.fr> - - * src/output.c (header_output): Remove, now handled completely via - M4. - -2002-02-25 Akim Demaille <akim@epita.fr> - - * m4/m4.m4: New, from CVS Autoconf. - * configure.in: Invoke it. - * src/output.c (output_skeleton): Use its result instead of the - hard coded name. - -2002-02-25 Akim Demaille <akim@epita.fr> - - * lib/tempname.c, lib/mkstemp.c, m4/mkstemp.m4: New, stolen from - Fileutils 4.1.5. - * configure.in: Invoke UTILS_FUNC_MKSTEMP. - * src/output.c (output_skeleton): Use mkstemp to create a real - temporary file. - Move the filling of `skeleton' and its muscle to... - (prepare): here. - (output): Move the definition of the prologue muscle to... - (prepare): here. - * src/system.h (DEFAULT_TMPDIR): New. - -2002-02-14 Paul Eggert <eggert@twinsun.com> - - Remove the support for C++ namespace cleanliness; it was - causing more problems than it was curing, since it didn't work - properly on some nonstandard C++ compilers. This can wait - for a proper C++ parser. - - * NEWS: Document this. - * doc/bison.texinfo (Bison Parser, Debugging): Remove special mention - of C++, as it's treated like C now. - * src/bison.simple (YYSTD): Remove. - (YYSIZE_T, YYFPRINTF, YYPARSE_PARAM_ARG, YYPARSE_PARAM_DECL): - Treat C++ just like Standard C instead of trying to support - namespace cleanliness. - -2002-02-14 Akim Demaille <akim@epita.fr> - - * tests/regression.at (else): Adjust to Andreas' change. - -2002-02-14 Akim Demaille <akim@epita.fr> - - * lib/Makefile.am (EXTRA_DIST): Ship strnlen.c. - -2002-02-13 Andreas Schwab <schwab@suse.de> - - * src/output.c (output_rule_data): Don't output NULL, it might - not be defined yet. - -2002-02-11 Robert Anisko <robert@lrde.epita.fr> - - * data/bison.c++ (YYDEBUG, YYERROR_VERBOSE): After the prologue. - (Copyright notice): Update. - -2002-02-11 Akim Demaille <akim@epita.fr> - - * tests/regression.at (%nonassoc and eof): Don't include - nonportable headers. - -2002-02-08 Robert Anisko <robert@lrde.epita.fr> - - * data/bison.c++: Correct error recovery. Make the user able to - initialize the starting location. - -2002-02-07 Akim Demaille <akim@epita.fr> - - * tests/input.at: New. - -2002-02-07 Robert Anisko <robert@lrde.epita.fr> - - * data/bison.c++: Replace some direct m4 expansions by constants. Be - more consistent when naming methods and variables. Put preprocessor - directives around tables only needed for debugging. - -2002-02-07 Robert Anisko <robert@lrde.epita.fr> - - * data/bison.c++ (yy::b4_name::print_): New method, replaces yyprint in - C++ parsers. - (yy::b4_name::parse): Use print_. - -2002-02-07 Robert Anisko <robert@lrde.epita.fr> - - * data/bison.c++ (yy::b4_name::parse): Error recovery is back. - -2002-02-07 Robert Anisko <robert@lrde.epita.fr> - - * data/bison.c++ (yy::b4_name::error_): New method, replaces yyerror in - C++ parsers. - (yy::b4_name::parse): Build verbose error messages, and use error_. - -2002-02-06 Robert Anisko <robert@lrde.epita.fr> - - * data/bison.c++: Fix m4 quoting in comments. - -2002-02-06 Robert Anisko <robert@lrde.epita.fr> - - * data/bison.c++: Adjust the parser code. Fix some muscles that were - not expanded by m4. - -2002-02-05 Akim Demaille <akim@epita.fr> - - * data/bison.c++: Adjust to the M4 back end. - More is certainly needed. - -2002-02-05 Akim Demaille <akim@epita.fr> - - Give a try to M4 as a back end. - - * lib/readpipe.c: New, from wdiff. - * src/Makefile.am (DEFS): Define PKGDATADIR, not BISON_SIMPLE and - BISON_HAIRY. - * src/system.h (BISON_HAIRY, BISON_SIMPLE): Remove the DOS and VMS - specific values. Now it is m4 that performs the lookup. - * src/parse-skel.y: Remove. - * src/muscle_tab.c, src/muscle_tab.h (muscles_m4_output): New. - * src/output.c (actions_output, guards_output) - (token_definitions_output): No longer keeps track of the output - line number, hence remove the second argument. - (guards_output): Check against the guard member of a rule, not the - action member. - Adjust callers. - (output_skeleton): Don't look for the skeleton location, let m4 do - that. - Create `/tmp/muscles.m4'. This is temporary, a proper temporary - file will be used. - Invoke `m4' on m4sugar.m4, muscles.m4, and the skeleton. - (prepare): Given that for the time being changesyntax is not - usable in M4, rename the muscles using `-' to `_'. - Define `defines_flag', `output_parser_name' and `output_header_name'. - * src/output.h (actions_output, guards_output) - (token_definitions_output): Adjust prototypes. - * src/scan-skel.l: Instead of scanning the skeletons, it now - processes the output of m4: `__oline__' and `#output'. - * data/bison.simple: Adjust to be used by M4(sugar). - * tests/Makefile.am: Use check_SCRIPTS to make sure `bison' is up - to date. - * tests/bison.in: Use the secrete envvar `BISON_PKGDATADIR' - instead of the dead `BISON_SIMPLE' and `BISON_HAIRY'. - * data/m4sugar/m4sugar.m4, data/m4sugar/version.m4: New, - shamelessly stolen from CVS Autoconf. - -2002-02-05 Akim Demaille <akim@epita.fr> - - * lib/hash.c, lib/hash.h: Replace with Fileutils 4.1's version. - * configure.in: Check for the declarations of free and malloc. - * src/muscle_tab.c: Adjust. - -2002-02-05 Akim Demaille <akim@epita.fr> - - * src/muscle_tab.c (muscle_init): Don't default to NULL muscle - which have no values. - -2002-02-05 Akim Demaille <akim@epita.fr> - - * src/bison.simple, src/bison.hairy, src/bison.c++: Move to... - * data/: here. - -2002-01-29 Paul Eggert <eggert@twinsun.com> - - * src/bison.simple (YYSIZE_T): Do not define merely because - YYSTACK_USE_ALLOCA is nonzero or alloca or _ALLOCA_H are defined. - On some platforms, <alloca.h> does not declare YYSTD (size_t). - -2002-01-27 Akim Demaille <akim@epita.fr> - - Fix `%nonassoc and eof'. - - * src/state.c (errs_dup): Aaaah! The failure was due to bytes - which were not properly copied! Replace - memcpy (res->errs, src->errs, src->nerrs); - with - memcpy (res->errs, src->errs, src->nerrs * sizeof (src->errs[0])); - !!! - * tests/regression.at (%nonassoc and eof): Adjust to newest - Autotest: `.' is not in the PATH. - -2002-01-27 Akim Demaille <akim@epita.fr> - - * tests/sets.at (AT_EXTRACT_SETS): New. - (Nullable): Use it. - (Firsts): New. - -2002-01-26 Akim Demaille <akim@epita.fr> - - * tests/actions.at, tests/calc.at, tests/headers.at, - * tests/torture.at: Adjust to the newest Autotest which no longer - forces `.' in the PATH. - -2002-01-25 Akim Demaille <akim@epita.fr> - - * tests/regression.at (%nonassoc and eof): New. - Suggested by Robert Anisko. - -2002-01-24 Akim Demaille <akim@epita.fr> - - Bison dumps core when trying to complain about broken input files. - Reported by Cris van Pelt. - - * src/lex.c (parse_percent_token): Be sure to set token_buffer. - * tests/regression.at (Invalid input: 1, Invalid input: 2): Merge - into... - (Invalid inputs): Strengthen: exercise parse_percent_token. - -2002-01-24 Robert Anisko <robert.anisko@epita.fr> - - * src/Makefile.am: Add bison.c++. - * src/bison.c++: New skeleton. - -2002-01-21 Paolo Bonzini <bonzini@gnu.org> - - * po/it.po: New. - -2002-01-21 Kees Zeelenberg <kzlg@users.sourceforge.net> - - * src/files.c (skeleton_find) [MSDOS]: Fix cp definition. - -2002-01-20 Marc Autret <marc@gnu.org> - - * src/files.c (compute_output_file_names): Fix - -2002-01-20 Marc Autret <marc@gnu.org> - - * tests/output.at: New test. - * src/files.c (compute_base_names): Don't map extensions when - the YACC flag is set, use defaults. - Reported by Evgeny Stambulchik. - -2002-01-20 Marc Autret <marc@gnu.org> - - * src/system.h: Need to define __attribute__ away for non-GCC - compilers as well (i.e., the vendor C compiler). - Suggested by Albert Chin-A-Young. - -2002-01-11 Tim Van Holder <tim.van.holder@pandora.be> - - * lib/hash.h, lib/hash.c: Renamed __P to PARAMS and used the - canonical definition. - * src/system.h: Use the canonical definition for PARAMS (avoids - a conflict with the macro from lib/hash.h). - -2002-01-11 Akim Demaille <akim@epita.fr> - - * configure.in: Use AC_FUNC_STRNLEN. - Fixes the failures observed on AIX 4.3 by H.Merijn Brand. - -2002-01-09 Akim Demaille <akim@epita.fr> - - * src/files.c, src/files.h (output_infix): New. - (tab_extension): Remove. - (compute_base_names): Compute the former, drop the latter. - * src/output.c (prepare): Insert the muscles `output-infix', and - `output-suffix'. - * src/parse-skel.y (string, string.1): New. - (section.header): Use it. - (section.yacc): Remove. - (prefix): Remove too. - * src/scan-skel.l: Adjust. - * src/bison.simple, src/bison.hairy: Adjust. - -2002-01-09 Akim Demaille <akim@epita.fr> - - * configure.in (WERROR_CFLAGS): Compute it. - * src/Makefile.am (CFLAGS): Pass it. - * tests/atlocal.in (CFLAGS): Idem. - * src/files.c: Fix a few warnings. - (get_extension_index): Remove, unused. - -2002-01-08 Akim Demaille <akim@epita.fr> - - * src/getargs.c (AS_FILE_NAME): New. - (getargs): Use it to convert DOSish file names. - * src/files.c (base_name): Rename as full_base_name to avoid - clashes with `base_name ()'. - (filename_split): New. - (compute_base_names): N-th rewrite, using filename_split. - -2002-01-08 Akim Demaille <akim@epita.fr> - - * lib/basename.c, lib/dirname.h, lib/dirname.c, lib/memrchr.c: - New, stolen from the Fileutils 4.1. - * lib/Makefile.am (libbison_a_SOURCES): Adjust. - * configure.in: Check for the presence of memrchr, and of its - prototype. - -2002-01-07 Tim Van Holder <tim.van.holder@pandora.be> - - * lib/hash.h (__P): Added definition for this macro. - * src/Makefile.am: Add parse-skel.c and scan-skel.c to - BUILT_SOURCES, to ensure they are generated first. - * src/parse-skel.y: Use YYERROR_VERBOSE instead of - %error-verbose to allow bootstrapping with bison 1.30x. - -2002-01-06 Akim Demaille <akim@epita.fr> - - * src/reader.c (parse_braces): Don't fetch the next char, the - convention is to fetch on entry. - * tests/torture.at (GNU Cim Grammar): Reintroduce their weird - 'switch' without a following semicolon. - * tests/regression.at (braces parsing): New. - -2002-01-06 Akim Demaille <akim@epita.fr> - - Bison is dead wrong in its RR conflict reports. - - * tests/torture.at (GNU Cim Grammar): New. - * src/conflicts.c (count_rr_conflicts): Fix. - -2002-01-06 Akim Demaille <akim@epita.fr> - - Creating package.m4 from configure.ac causes too many problems. - - * tests/Makefile.am (package.m4): Create it by hand, - AC_CONFIG_TESTDIR no longer does in the most recent CVS Autoconf. - -2002-01-06 Akim Demaille <akim@epita.fr> - - * src/Makefile.am (bison_SOURCES): Add parse-skel.h and - skeleton.h. - -2002-01-04 Paul Eggert <eggert@twinsun.com> - - * doc/bison.texinfo (Debugging): - Remove YYSTDERR; it's no longer defined or used. - Also, s/cstdio.h/cstdio/. - -2002-01-03 Akim Demaille <akim@epita.fr> - - * tests/bison.in, tests/atlocal.in: Adjust to CVS Autoconf. - -2002-01-03 Akim Demaille <akim@epita.fr> - - * src/parse-skel.y (process_skeleton): Don't bind the parser's - tracing code to --trace, wait for a better --trace option, with - args. - -2002-01-03 Akim Demaille <akim@epita.fr> - - * src/bison.simple (YYSTDERR): Remove, replace `stderr'. - The ISO C++ standard is extremely clear about it: stderr is - considered a macro, not a regular symbol (see table 94 `Header - <cstdio> synopsis', [lib.c.files] 27.8.2 C Library files). - Therefore std:: does not apply to it. It still does with fprintf. - Also, s/cstdio.h/cstdio/. - -2002-01-03 Akim Demaille <akim@epita.fr> - - * lib/quotearg.c: Use `#include "..."' instead of `#include <...>' - for non system headers. - -2002-01-02 Akim Demaille <akim@epita.fr> - - Equip the skeleton chain with location tracking, runtime trace, - pure parser and scanner. - - * src/parse-skel.y: Request a pure parser, locations, and prefix - renaming. - (%union): Having several members with the same type does not help - type mismatches, simplify. - (YYPRINT, yyprint): New. - (yyerror): ``Rename'' (there is a #define yyerror skel_error) as... - (skel_error): this. - Handle locations. - * src/scan-skel.l: Adjust to these changes. - * src/skeleton.h (LOCATION_RESET, LOCATION_LINES, LOCATION_STEP) - (LOCATION_PRINT, skel_control_t): New. - -2001-12-30 Akim Demaille <akim@epita.fr> - - * src/parse-skel.y: Get rid of the shift/reduce conflict: - replace `gb' with BLANKS. - * src/scan-skel.l: Adjust. - -2001-12-30 Akim Demaille <akim@epita.fr> - - * src/system.h: We don't need nor want bcopy. - Throw away MS-DOS crap: we don't need getpid. - * configure.in: We don't need strndup. It was even causing - problems: because Flex includes the headers *before* us, - _GNU_SOURCE is not defined by config.h, and therefore strndup was - not visible. - * lib/xstrndup.c: New. - * src/scan-skel.l: Use it. - Be sure to initialize yylval.muscle member when scanning a MUSCLE. - * src/parse-skel.y: Use %directives instead of #defines. - -2001-12-30 Akim Demaille <akim@epita.fr> - - * src/skeleton.h: New. - * src/output.c (output_parser, output_master_parser): Remove, dead - code. - * src/output.h (get_lines_number, actions_output, guards_output) - (token_definitions_output): Prototype them. - * src/parse-skel.y: Add the license notice. - Include output.h and skeleton.h. - (process_skeleton): Returns void, and takes a single parameter. - * src/scan-skel.l: Add the license notice. - Include skeleton.h. - Don't use %option yylineno: it seems that then Flex imagines - REJECT has been used, and therefore it won't reallocate its - buffers (which makes no other sense to me than a bug). It results - in warnings for `unused: yy_flex_realloc'. - -2001-12-30 Robert Anisko <robert.anisko@epita.fr> - - * src/muscle_tab.h (MUSCLE_INSERT_INT, MUSCLE_INSERT_STRING) - (MUSCLE_INSERT_PREFIX): ...to there. - * src/output.c (MUSCLE_INSERT_INT, MUSCLE_INSERT_STRING) - (MUSCLE_INSERT_PREFIX): Move from here... - - * src/bison.hairy: Add a section directive. Put braces around muscle - names. This parser skeleton is still broken, but Bison should not - choke on a bad muscle 'syntax'. - * src/bison.simple: Add a section directive. Put braces around muscle - names. - - * src/files.h (strsuffix, stringappend): Add declarations. - (tab_extension): Add declaration. - (short_base_name): Add declaration. - - * src/files.c (strsuffix, stringappend): No longer static. These - functions are used in the skeleton parser. - (tab_extension): New. - (compute_base_names): Use the computations done in this function - to guess if the generated parsers should have '.tab' in their - names. - (short_base_name): No longer static. - - * src/output.c (output_skeleton): New. - (output): Disable call to output_master_parser, and give a try to - a new skeleton handling system. - (guards_output, actions_output): No longer static. - (token_definitions_output, get_lines_number): No longer static. - - * configure.in: Use AM_PROG_LEX and AC_PROG_YACC. - - * src/Makefile.am (bison_SOURCES): Add scan-skel.l and - parse-skel.y. - - * src/parse-skel.y: New file. - * src/scan-skel.l: New file. - -2001-12-29 Akim Demaille <akim@epita.fr> - - %name-prefix is broken. - - * src/files.c (spec_name_prefix): Initialize to NULL, not to "yy". - Adjust all dependencies. - * tests/headers.at (export YYLTYPE): Strengthen this test: use - %name-prefix. - - Renaming yylval but not yylloc is not consistent. Now we do. - - * src/bison.simple: Prefix yylloc if used. - * doc/bison.texinfo (Decl Summary): Document that. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo: Promote `%long-directive' over - `%long_directive'. - Remove all references to fixed-output-files, yacc is enough. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/bison.simple: Define YYDEBUG and YYERROR_VERBOSE *after* the - user prologue. These are defaults. - * tests/actions.at (Mid-rule actions): Make sure the user can - define YYDEBUG and YYERROR_VERBOSE. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/output.c (header_output): Don't forget to export YYLTYPE and - yylloc. - * tests/headers.at (export YYLTYPE): New, make sure it does. - * tests/regression.at (%union and --defines, Invalid CPP headers): - Move to... - * tests/headers.at: here. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/gram.h (rule_s): Member `assoc' is of type `associativity'. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * tests/actions.at (Mid-rule actions): Output on a single line - instead of several. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo: Formatting changes. - -2001-12-29 Akim Demaille <akim@epita.fr> - - Don't store the token defs in a muscle, just be ready to output it - on command. Now possible via `symbols'. Fixes a memory leak. - - * src/output.c (token_definitions_output): New. - (output_parser, header_output): Use it. - * src/reader.c (symbols_save): Remove. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/bison.simple: Do not provide a default for YYSTYPE and - YYLTYPE before the user's prologue. Otherwise it's hardly... a - default. - -2001-12-29 Akim Demaille <akim@epita.fr> - - Mid-rule actions are simply... ignored! - - * src/reader.c (readgram): Be sure to attach mid-rule actions to - the empty-rule associated to the dummy symbol, not to the host - rule. - * tests/actions.at (Mid-rule actions): New. - -2001-12-29 Akim Demaille <akim@epita.fr> - - Memory leak. - - * src/reader.c (reader): Free grammar. - -2001-12-29 Akim Demaille <akim@epita.fr> - - Memory leak. - - * src/LR0.c (new_itemsets): Don't allocate `shift_symbol' here, - since it allocates it for each state, although only one is needed. - (allocate_storage): Do it here. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/options.h, src/options.c (create_long_option_table): Rename - as... - (long_option_table_new): this, with a clearer prototype. - (percent_table): Remove, unused, - * src/getargs.c (getargs): Adjust. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/LR0.c, src/conflicts.c, src/lalr.c, src/lalr.h, src/output.c - * src/print.c, src/print_graph.c, src/state.h: Rename state_table - as states. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/lalr.c (build_relations): Rename `states' as `states1'. - Sorry, I don't understand exactly what it is, no better name... - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/closure.c, src/conflicts.c, src/derives.c, src/gram.c - * src/gram.h, src/lalr.c, src/nullable.c, src/output.c, src/print.c - * src/print_graph.c, src/reader.c, src/reduce.c: Rename rule_table - as rules. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/gram.c (rprec, rprecsym, rassoc): Remove, unused since long - ago. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/reader.c, src/reader.h (user_toknums): Remove. - Adjust all users to use symbols[i]->user_token_number. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/gram.c, src/gram.h (sprec, sassoc): Remove. - Adjust all users to use symbols[i]->prec or ->assoc. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/reader.c, src/reader.h (tags): Remove. - Adjust all users to use symbols[i]->tag. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/gram.h, src/gram.c (symbols): New, similar to state_table - and rule_table. - * src/reader.c (packsymbols): Fill this table. - Drop sprec. - * src/conflicts.c (resolve_sr_conflict): Adjust. - * src/reduce.c (reduce_grammar): Adjust: just sort symbols, a - single table. - Use symbols[i]->tag instead of tags[i]. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * tests/calc.at (_AT_DATA_CALC_Y): Also use %union. - In addition, put a comment in there, to replace... - * tests/regression.at (%union and C comments): Remove. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * tests/regression.at (Web2c Actions): Blindly move the actual - output as expected output. The contents *seem* right to me, but I - can't pretend reading perfectly parser tables... Nonetheless, all - the other tests pass correctly, the table look OK, even though the - presence of `$axiom' is to be noted: AFAICS it is useless (but - harmless). - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/reader.c (readgram): Don't add the rule 0 if there were no - rules read. In other words, add it _after_ having performed - grammar sanity checks. - Fixes the `tests/regression.at (Invalid input: 1)' Failure. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * tests/regression.at (Web2c Report): Catch up: the rule 0 is now - visible, and some states have now a different number. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/reader.c (readgram): Bind the initial rule's lineno to that - of the first rule. - * tests/regression.at (Rule Line Numbers, Unresolved SR Conflicts): - (Solved SR Conflicts): Adjust rule 0's line number. - -2001-12-29 Akim Demaille <akim@epita.fr> - - Fix the `GAWK Grammar' failure. - - * src/LR0.c (final_state): Initialize to -1 so that we do compute - the reductions of the first state which was mistakenly confused - with the final state because precisely final_state was initialized - to 0. - * tests/sets.at (Nullable): Adjust: state 0 does have lookaheads, - now noticed by Bison. - * tests/regression.at (Rule Line Numbers): Adjust: state 0 does - have a reduction on $default. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/gram.c (ritem_print): Be sure to subtract 1 when displaying - rule line numbers. - * src/closure.c (print_closure): Likewise. - * src/derives.c (print_derives): Likewise. - * tests/sets.at (Nullable): Adjust: the rule numbers are correct - now. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/lalr.c (lookaheads_print): New. - (lalr): Call it when --trace-flag. - * tests/sets.at (Nullable): Adjust: when tracing, the lookaheads - are dumped. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/derives.c (print_derives): Be sure to use `>= 0', not `> 0', - when walking through ritem, even via rule->rhs. - * src/reduce.c (dump_grammar, useful_production, reduce_output) - (useful_production, useless_nonterminals): Likewise. - (reduce_grammar_tables): Likewise, plus update nritems. - * src/nullable.c (set_nullable): Likewise. - * src/lalr.c (build_relations): Likewise. - * tests/sets.at (Nullable): Adjust. - Fortunately, now, the $axiom is no longer nullable. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/LR0.c (generate_states): Use nritems, not nitems, nor using - the 0-sentinel. - * src/gram.c (ritem_longest_rhs): Likewise. - * src/reduce.c (nonterminals_reduce): Likewise. - * src/print_graph.c (print_graph): Likewise. - * src/output.c (output_rule_data): Likewise. - * src/nullable.c (set_nullable): Likewise. - -2001-12-29 Akim Demaille <akim@epita.fr> - - * src/output.c: Comment changes. - -2001-12-27 Paul Eggert <eggert@twinsun.com> - - * src/bison.simple (YYSTACK_ALLOC, YYSIZE_T): Remove special - cases for non-GNU systems like AIX, HP-UX, SGI, Sun, and - Sparc, as they were causing more porting problems than the - (minor) performance improvement was worth. - - Also, catch up with 1.31's YYSTD. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/output.c (output_gram): Rely on nritems, not the - 0-sentinel. See below. - Use -1 as separator, not 0. - * src/bison.simple (yyparse): Subtract 1 to the rule numbers. - Rely on -1 as separator in yyrhs, instead of 0. - * tests/calc.at (AT_CHECK_CALC): Now, the parsers no longer issue - twice `Now at end of input', therefore there are two lines less to - expect. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * tests/regression.at (Unresolved SR Conflicts): - (Solved SR Conflicts, Rule Line Numbers): Adjust to the changes - below. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/LR0.c (new_state): Recognize the final state by the fact it - is reached by eoftoken. - (insert_start_shifting_state, insert_eof_shifting_state) - (insert_accepting_state, augment_automaton): Remove, since now - these states are automatically computed from the initial state. - (generate_states): Adjust. - * src/print.c: When reporting a rule number to the user, substract - 1, so that the axiom rule is rule 0, and the first user rule is 1. - * src/reduce.c: Likewise. - * src/print_graph.c (print_core): For the time being, just as for - the report, depend upon --trace-flags to dump the full set of - items. - * src/reader.c (readgram): Once the grammar read, insert the rule - 0: `$axiom: START-SYMBOL $'. - * tests/set.at: Adjust: rule 0 is now displayed, and since the - number of the states has changed (the final state is no longer - necessarily the last), catch up. - -2001-12-27 Akim Demaille <akim@epita.fr> - - Try to make the use of the eoftoken valid. Given that its value - is 0 which was also used as a sentinel in ritem, (i) make sure >= 0 - is used instead of > 0 where appropriate, (ii), depend upon nritems - instead of the 0-sentinel. - - * src/gram.h, src/gram.c (nritems): New. - Expected to be duplication of nitems, but for the time being... - * src/reader.c (packgram): Assert nritems and nitems are equal. - * src/LR0.c (allocate_itemsets, new_itemsets): Adjust. - * src/closure.c (print_closure, print_fderives): Likewise. - * src/gram.c (ritem_print): Likewise. - * src/print.c (print_core, print_grammar): Likewise. - * src/print_graph.c: Likewise. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/main.c (main): If there are complains after grammar - reductions, then output the report anyway if requested, then die. - * src/symtab.c (bucket_new): Initialize `value' to -1, not 0. - * src/reader.c (eoftoken): New. - (parse_token_decl): If the token being defined has value `0', it - is the eoftoken. - (packsymbols): No longer hack `tags' to insert `$' by hand. - Be sure to preserve the value of the eoftoken. - (reader): Make sure eoftoken is defined. - Initialize nsyms to 0: now eoftoken is created just like the others. - * src/print.c (print_grammar): Don't special case the eof token. - * src/regression.at: Adjust: `$' has value 0, not -1, which was a - lie anyway, albeit pleasant. - * tests/calc.at: Exercise error messages with eoftoken. - Change the grammar so that empty input is invalid. - Adjust expectations. - When yyungeting, be sure to use a valid yylloc: use last_yylloc. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * configure.in: Check the protos of strchr ans strspn. - Replace strchr if needed. - * src/system.h: Provide the protos of strchr, strspn and memchr if - missing. - * lib/strchr.c: New. - * src/reader.c (symbols_save): Use strchr. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/print.c, src/print_graph.c (escape): New. - Use it to quote the TAGS outputs. - * src/print_graph.c (print_state): Now errors are in red, and - reductions in green. - Prefer high to wide: output the state number on a line of its own. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/state.h, src/state.c (reductions_new): New. - * src/LR0.c (set_state_table): Let all the states have a - `reductions', even if reduced to 0. - (save_reductions): Adjust. - * src/lalr.c (initialize_LA, initialize_lookaheads): Adjust. - * src/print.c (print_reductions, print_actions): Adjust. - * src/output.c (action_row): Adjust. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/state.h, src/state.c (errs_new, errs_dup): New. - * src/LR0.c (set_state_table): Let all the states have an errs, - even if reduced to 0. - * src/print.c (print_errs, print_reductions): Adjust. - * src/output.c (output_actions, action_row): Adjust. - * src/conflicts.c (resolve_sr_conflict): Adjust. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/lalr.c (set_goto_map, initialize_F): Use SHIFT_SYMBOL. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/conflicts.c, src/conflicts.h (print_reductions): Move to... - * src/print.c: here. - (lookaheadset, shiftset): New, used as additional storage by - print_reductions. - (print_results): Adjust. - (print_shifts, print_gotos, print_errs): New, extracted from... - (print_actions): here. - * src/print_graph.c (print_actions): Remove dead code. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/reader.c (copy_dollar, copy_at): Better checking of `n' in - `$n' and `@n'. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/lalr.c (add_lookback_edge): Use state_t instead of ints. - (build_relations): Adjust. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/lalr.c (set_goto_map): Remove a wrong but benign loop - duplication. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/reader.c (packgram): Catch nitems overflows. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/files.c, src/files.h (guard_obstack): Remove. - * src/output.c (output): Adjust. - * src/reader.c (parse_braces): New, factoring... - (copy_action, copy_guard): these two which are renamed as... - (parse_action, parse_guard): these. - As a voluntary consequence, using braces around guards is now - mandatory. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/gram.h (rule_t): `guard' and `guard_line' are new members. - * src/reader.c (symbol_list): `guard' and `guard_line' are new - members. - (symbol_list_new): Adjust. - (copy_action): action_line is the first line, not the last. - (copy_guard): Just as for actions, store the `action' only, not - the switch/case/break flesh. - Don't parse the user action that might follow the guard, let... - (readgram): do it, i.e., now, there can be an action after a - guard. - In other words the guard is just explicitly optional. - (packgram): Adjust. - * src/output.c (guards_output): New. - (output_parser): Call it when needed. - (output): Also free the guard and attrs obstacks. - * src/files.c, src/files.h (obstack_save): Remove. - (output_files): Remove. - As a result, if one needs the former `.act' file, using an - appropriate skeleton which requires actions and guards is now - required. - * src/main.c (main): Adjust. - * tests/semantic.at: New. - * tests/regression.at: Use `input.y' as input file name. - Avoid 8+3 problems by requiring input.c when the test needs the - parser. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/reader.c (symbol_list_new): Be sure to initialize all the - fields. - -2001-12-27 Akim Demaille <akim@epita.fr> - - All the hacks using a final pseudo state are now useless. - - * src/LR0.c (set_state_table): state_table holds exactly nstates. - * src/lalr.c (nLA): New. - (initialize_LA, compute_lookaheads, initialize_lookaheads): Use it - instead of lookaheadsp from the pseudo state (nstate + 1). - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/output.c (action_row, token_actions): Use a state_t instead - of a integer, and nlookaheads instead of the following state's - lookaheadsp. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (log_resolution, flush_shift) - (resolve_sr_conflict, set_conflicts, solve_conflicts) - (count_sr_conflicts, count_rr_conflicts, conflicts_output) - (conflicts_print, print_reductions): Use a state_t instead of an - integer when referring to a state. - As much as possible, depend upon nlookaheads, instead of the - `lookaheadsp' member of the following state (since lookaheads of - successive states are successive, the difference between state n + 1 - and n served as the number of lookaheads for state n). - * src/lalr.c (add_lookback_edge): Likewise. - * src/print.c (print_core, print_actions, print_state) - (print_results): Likewise. - * src/print_graph.c (print_core, print_actions, print_state) - (print_graph): Likewise. - * src/conflicts.h: Adjust. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/bison.hairy: Formatting/comment changes. - ANSIfy. - Remove `register' indications. - Add plenty of `static'. - -2001-12-27 Akim Demaille <akim@epita.fr> - - * src/output.c (prepare): Drop the muscle `ntbase' which - duplicates ntokens. - * src/bison.simple: Formatting/comment changes. - Use YYNTOKENS only, which is documented, but not YYNTBASE, which - is an undocumented synonym. - -2001-12-22 Akim Demaille <akim@epita.fr> - - * src/output.c (output_table_data): Change the prototype to use - `int' for array ranges: some invocations do pass an int, not a - short. - Reported by Wayne Green. - -2001-12-22 Akim Demaille <akim@epita.fr> - - Some actions of web2c.y are improperly triggered. - Reported by Mike Castle. - - * src/lalr.c (traverse): s/F (i)[k] = F (j)[k]/F (j)[k] = F (i)[k]/. - * tests/regression.at (Web2c): Rename as... - (Web2c Report): this. - (Web2c Actions): New. - -2001-12-22 Akim Demaille <akim@epita.fr> - - Reductions in web2c.y are improperly reported. - Reported by Mike Castle. - - * src/conflicts.c (print_reductions): Fix. - * tests/regression.at (Web2c): New. - -2001-12-18 Akim Demaille <akim@epita.fr> - - Some host fail on `assert (!"foo")', which expands to - ((!"foo") ? (void)0 : __assert("!"foo."", __FILE__, __LINE__)) - Reported by Nelson Beebee. - - * src/output.c, src/vcg.c: Replace `assert (!"it succeeded")' with - `#define it_succeeded 0' and `assert (it_succeeded)'. - -2001-12-17 Marc Autret <autret_m@epita.fr> - - * src/bison.simple: Don't hard code the skeleton line and filename. - * src/output.c (output_parser): Rename 'line' as 'output_line'. - New line counter 'skeleton_line' (skeleton-line muscle). - -2001-12-17 Paul Eggert <eggert@twinsun.com> - - * NEWS, doc/bison.texinfo, doc/bison.1, doc/bison.rnh: Document that - YYDEBUG must be defined to a nonzero value. - - * src/bison.simple (yytname): Do not assume that the user defines - YYDEBUG to a properly parenthesized expression. - -2001-12-17 Akim Demaille <akim@epita.fr> - - * src/state.h (state_t): Rename lookaheads as lookaheadsp. - nlookaheads is a new member. - Adjust all users. - * src/lalr.h (nlookaheads): Remove this orphan declaration. - * src/lalr.c (initialize_lookaheads): Set nlookaheads for each - state. - -2001-12-17 Akim Demaille <akim@epita.fr> - - * src/files.h, src/files.c (open_files, close_files): Remove. - * src/main.c (main): Don't open/close files, nor invoke lex_free, - let... - * src/reader.c (reader): Do it. - -2001-12-17 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (print_reductions): Formatting changes. - -2001-12-17 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (flush_shift): Also adjust lookaheadset. - (flush_reduce): New. - (resolve_sr_conflict): Adjust. - -2001-12-17 Akim Demaille <akim@epita.fr> - - * src/output.c (output_obstack): Be static and rename as... - (format_obstack): this, to avoid any confusion with files.c's - output_obstack. - * src/reader.h (muscle_obstack): Move to... - * src/output.h: here, since it's defined in output.c. - -2001-12-17 Akim Demaille <akim@epita.fr> - - * src/output.c (action_row, save_column, default_goto) - (sort_actions, matching_state, pack_vector): Better variable - locality. - -2001-12-17 Akim Demaille <akim@epita.fr> - - * src/output.c: Various formatting changes. - -2001-12-17 Akim Demaille <akim@epita.fr> - - * src/files.c (output_files): Free the output_obstack. - * src/main.c (main): Call print and print_graph conditionally. - * src/print.c (print): Work unconditionally. - * src/print_graph.c (print_graph): Work unconditionally. - * src/conflicts.c (log_resolution): Output only if verbose_flag. - -2001-12-16 Marc Autret <autret_m@epita.fr> - - * src/output.c (actions_output): Fix. When we use %no-lines, - there is one less line per action. - -2001-12-16 Marc Autret <autret_m@epita.fr> - - * src/bison.simple: Remove a useless #line directive. - s/#line %%line %%skeleton/#line %%line "%%parser-file-name"/'. - * src/output.c (get_lines_number): New. - (output_parser): Adjust, now takes care about the lines of a - output muscles. - Fix line numbering. - (actions_output): Computes the number of lines taken by actions. - (output_master_parser): Insert new skeleton which is the name of - the output parser file name. - -2001-12-15 Marc Autret <autret_m@epita.fr> - - * src/bison.simple [YYERROR_VERBOSE]: Restore backward compatibility. - -2001-12-15 Marc Autret <autret_m@epita.fr> - - * src/output.c (output_gram): Keep track of the hairy one. - -2001-12-15 Akim Demaille <akim@epita.fr> - - Make `make distcheck' work. - - * lib/Makefile.am (INCLUDES): Add top_srcdir/intl, since hash uses - system.h which uses libgettext.h. - -2001-12-15 Akim Demaille <akim@epita.fr> - - * src/nullable.c (set_nullable): Useless rules must be skipped, - otherwise, since we range over their symbols, we might look at a - nonterminal which no longer ``exists'', i.e., it is not counted in - `nvars', hence we overflow our arrays. - -2001-12-15 Akim Demaille <akim@epita.fr> - - The header can also be produced directly, without any obstack! - Yahoo! - - * src/files.c, src/files.h (defines_obstack): Remove. - (compute_header_macro): Global. - (defines_obstack_save): Remove. - * src/reader.c (parse_union_decl): No longer output to - defines_obstack: its content can be found in the `stype' muscle - anyway. - (output_token_translations): Merge into... - (symbols_output): this. - Rename as... - (symbols_save): this. - (reader): Adjust. - * src/output.c (header_output): New. - (output): Call it. - -2001-12-15 Akim Demaille <akim@epita.fr> - - * src/reader.c (parse_union_decl): Instead of handling two obstack - simultaneously, use one to define the `stype' muscle, and use the - value of the latter to fill defines_obstack. - (copy_comment): Remove. - (copy_comment2): Work for a single obstack. - Rename as... - (copy_comment): this. - -2001-12-15 Akim Demaille <akim@epita.fr> - - * src/lex.c, src/lex.h (xgetc): No longer static. - * src/reader.c (parse_union_decl): Revamp. - -2001-12-15 Akim Demaille <akim@epita.fr> - - Still making progress in separating Bison into (i) input, (ii) - process, (iii) output: now we can directly output the parser file - without using table_obstack at all. - - * src/files.c, src/files.h (table_obstack): Bye bye. - (parser_file_name): New. - * src/files.c (compute_output_file_names): Compute it. - * src/output.c (actions_output, output_parser) - (output_master_parser): To a file instead of an obstack. - -2001-12-15 Akim Demaille <akim@epita.fr> - - Attach actions to rules, instead of pre-outputting them to - actions_obstack. - - * src/gram.h (rule_t): action and action_line are new members. - * src/reader.c (symbol_list): Likewise. - (copy_action): Save the actions within the rule. - (packgram): Save them in rule_table. - * src/output.c (actions_output): New. - (output_parser): Use it on `%%actions'. - (output_rule_data): Don't free rule_table. - (output): Do it. - (prepare): Don't save the `action' muscle. - * src/bison.simple: s/%%action/%%actions/. - -2001-12-15 Akim Demaille <akim@epita.fr> - - * src/reader.c (copy_action): When --yacc, don't append a `;' - to the user action: let it fail if lacking. - Suggested by Arnold Robbins and Tom Tromey. - -2001-12-14 Akim Demaille <akim@epita.fr> - - * src/lex.c (literalchar): Simply return the char you decoded, non - longer mess around with obstacks and int pointers. - Adjust all callers. - -2001-12-14 Akim Demaille <akim@epita.fr> - - * src/lex.c (literalchar): Don't escape the special characters, - just decode them, and keep them as char (before, eol was output as - the 2 char string `\n' etc.). - * src/output.c (output_rule_data): Use quotearg to output the - token strings. - -2001-12-13 Paul Eggert <eggert@twinsun.com> - - * src/bison.simple (YYSIZE_T, YYSTACK_ALLOC, YYSTACK_FREE): - Do not infringe on the global user namespace when using C++. - (YYFPRINTF, YYSTDERR): New macros, needed for the above. - All uses of `fprintf' and `stderr' changed. - - * doc/bison.texinfo: Document YYFPRINTF, YYSTDERR. - -2001-12-13 Akim Demaille <akim@epita.fr> - - The computation of nullable is broken: it doesn't handle empty - RHS's properly. - - * tests/torture.at (GNU AWK Grammar): New. - * tests/sets.at (Nullable): New. - * src/nullable.c (set_nullable): Instead of blindly looping over - `ritems', loop over the rules, and then over their rhs's. - - Work around Autotest bugs. - - * src/warshall.c (bitmatrix_print): Don't use `+--+' as table - frame, because Autotest understand lines starting with a `+' as - traces from the shell. Then, they are not processed properly. - Admittedly an Autotest bug, but we don't have time to wait for - Autotest to catch up. - * tests/regression.at (Broken Closure): Adjust to the new table - frames. - Move to... - * tests/sets.at: here. - -2001-12-13 Akim Demaille <akim@epita.fr> - - * src/closure.c (closure): Use nrules instead of playing tricks - with BITS_PER_WORD. - -2001-12-13 Akim Demaille <akim@epita.fr> - - * src/print.c (print_actions): Output the handling of `$' as the - traces do: shifting the token EOF. Before EOF was treated as a - nonterminal. - * tests/regression.at: Adjust some tests. - * src/print_graph.c (print_core): Complete the set of items via - closure. The next-to-final and final states are still unsatisfying, - but that's to be addressed elsewhere. - No longer output the rule numbers, but do output the state number. - A single loop for the shifts + gotos is enough, but picked a - distinct color for each. - (print_graph): Initialize and finalize closure. - -2001-12-13 Akim Demaille <akim@epita.fr> - - * src/reader.c (readgram): Remove dead code, an strip useless - braces. - (get_type): Remove, unused. - -2001-12-12 Akim Demaille <akim@epita.fr> - - * src/complain.h, src/complain.c: Remove error_one_per_line, rely - on that of lib/error.c. - -2001-12-12 Akim Demaille <akim@epita.fr> - - Some hosts don't like `/' in includes. - - * src/system.h: Include libgettext.h without qualifying the path. - * src/Makefile.am (INCLUDES): Add $(top_srcdir)/intl, remove - $(top_srcdir). - -2001-12-11 Marc Autret <autret_m@epita.fr> - - * src/output.c (output_parser): Remove useless muscle. - -2001-12-11 Marc Autret <autret_m@epita.fr> - - * src/bison.simple: Remove #line just before %%epilogue. It - is now handled in ... - * src/reader.c (read_additionnal_code): Add the output of a - #line for the epilogue. - -2001-12-10 Marc Autret <autret_m@epita.fr> - - * src/reader.c (copy_definition): Re-use CPP-outed code which - replace precedent remove. - * src/bison.simple: Remove #line before %%prologue because - %%input-line is wrong at this time. - -2001-12-10 Marc Autret <autret_m@epita.fr> - - * src/reader.c (symbols_output): Clean up. - * src/output.c (output_gram, output): Clean up. - -2001-12-10 Akim Demaille <akim@epita.fr> - - * src/lalr.c (initialize_lookaheads): New. Extracted from... - * src/LR0.c (set_state_table): here. - * src/lalr.c (lalr): Call it. - -2001-12-10 Akim Demaille <akim@epita.fr> - - * src/state.h (shifts): Remove the `number' member: shifts are - attached to state, hence no longer need to be labelled with a - state number. - -2001-12-10 Akim Demaille <akim@epita.fr> - - Now that states have a complete set of members, the linked list of - shifts is useless: just fill directly the state's shifts member. - - * src/state.h (shifts): Remove the `next' member. - * src/LR0.c (first_state, last_state): Remove. - Adjust the callers. - (augment_automaton): Don't look for the shifts that must be added - a shift on EOF: it is those of the state we looked for! But now, - since shifts are attached, it is no longer needed to looking - merely by its id: its number. - -2001-12-10 Akim Demaille <akim@epita.fr> - - * src/LR0.c (augment_automaton): Better variable locality. - Remove an impossible branch: if there is a state corresponding to - the start symbol being shifted, then there is shift for the start - symbol from the initial state. - -2001-12-10 Akim Demaille <akim@epita.fr> - - * src/LR0.c (augment_automaton): Call `insert_eof_shifting_state' - only when appropriate: when insert_start_shifting_state' is not - invoked. - * tests/regression.at (Rule Line Numbers): Adjust. - -2001-12-10 Akim Demaille <akim@epita.fr> - - * src/LR0.c (augment_automaton): Now that all states have shifts, - merge the two cases addition shifts to the initial state. - -2001-12-10 Akim Demaille <akim@epita.fr> - - * src/lalr.c (set_state_table): Move to... - * src/LR0.c: here. - * src/lalr.c (lalr): Don't call it... - * src/LR0.c (generate_states): do it. - * src/LR0.h (first_state): Remove, only the table is used. - -2001-12-10 Akim Demaille <akim@epita.fr> - - * src/LR0.h (first_shift, first_reduction): Remove. - * src/lalr.c: Don't use first_shift: find shifts through the - states. - -2001-12-10 Akim Demaille <akim@epita.fr> - - * src/LR0.c: Attach shifts to states as soon as they are - computed. - * src/lalr.c (set_state_table): Instead of assigning shifts to - state, just assert that the mapping was properly done. - -2001-12-10 Akim Demaille <akim@epita.fr> - - * src/LR0.c (insert_start_shift): Rename as... - (insert_start_shifting_state): this. - (insert_eof_shifting_state, insert_accepting_state): New. - (augment_automaton): Adjust. - Better locality of the variables. - When looking if the start_symbol is shifted from the initial - state, using `while (... symbol != start_symbol ...)' sounds - better than `while (... symbol < start_symbol ...)': If fail - to see how the order between symbols could be relevant! - -2001-12-10 Akim Demaille <akim@epita.fr> - - * src/getargs.h: Don't declare `spec_name_prefix' and - `spec_file_prefix', declared by src/files.h. - * src/files.c, src/files.h: Default for spec_name_prefix is "yy". - * src/muscle_tab.c (muscle_init): Default prefix to NULL. - * src/output.c (prepare): Adjust. - * src/reader.c (symbols_output): Likewise. - * src/vmsgetargs.c: Vaguely adjust, but who cares? - -2001-12-10 Akim Demaille <akim@epita.fr> - - * src/muscle_tab.c (muscle_init): NULL is a better default than - `"0"'. - -2001-12-10 Akim Demaille <akim@epita.fr> - - * src/reader.c (reader): Calling symbols_output once is enough. - -2001-12-10 Akim Demaille <akim@epita.fr> - - Now that states have a complete set of members, the linked list of - reductions is useless: just fill directly the state's reductions - member. - - * src/state.h (struct reductions): Remove member `number' and - `next'. - * src/LR0.c (first_reduction, last_reduction): Remove. - (save_reductions): Don't link the new reductions, store them in - this_state. - * src/lalr.c (set_state_table): No need to attach reductions to - states, it's already done. - * src/output.c (output_actions): No longer free the shifts, then - the reductions, then the states: free all the states and their - members. - -2001-12-10 Akim Demaille <akim@epita.fr> - - * src/options.c (OPTN, DRTV, BOTH): New. - (option_table): Use them. - - * src/muscle_tab.c: Don't include xalloc.h and string.h: that's - the job of system.h. - * src/options.c: Don't include stdio.h and xalloc.h for the same - reasons. - -2001-12-10 Akim Demaille <akim@epita.fr> - - * src/output.c (output, prepare): Make sure the values of the - muscles `action' and `prologue' are 0-terminated. - -2001-12-10 Akim Demaille <akim@epita.fr> - - Clean up GCC warnings. - - * src/reader.c (copy_action): `buf' is not used. - (parse_skel_decl): Be static. - * src/muscle_tab.c (mhash1, mhash2, muscle_insert): Preserve `const'. - * src/options.h (create_long_option_table): Have a real prototype. - * lib/hash.c, lib/hash.h (hash_insert, hash_insert_at, hash_delete) - (hash_delete_at): Return const void *. - Adjust casts to preserve the const. - -2001-12-10 Akim Demaille <akim@epita.fr> - - * configure.in: Require 2.52g. - M4 is not needed, but AUTOM4TE is. - * m4/m4.m4: Remove. - * tests/Makefile.am: Adjust. - -2001-12-10 Akim Demaille <akim@epita.fr> - - One structure for states is enough, even though theoretically - there are LR(0) states and LALR(1) states. - - * src/lalr.h (state_t): Remove. - (state_table): Be state_t **, not state_t *. - * src/state.h (core, CORE_ALLOC): Rename as... - (state_t, STATE_ALLOC): this. - Add the LALR(1) members: shifts, reductions, errs. - * src/LR0.c (state_table): Rename as... - (state_hash): this, to avoid name clashes with the global - `state_table'. - * src/print_graph.c, src/LR0.c, src/LR0.h, src/conflicts.c - * src/lalr.c, src/lalr.h, src/output.c, src/print.c: Adjust. - -2001-12-10 Akim Demaille <akim@epita.fr> - - Bison dumps core on bash.y. - Reported by Pascal Bart. - - * src/warshall.c (bitmatrix_print): New. - (TC): Use it. - When performing a transitive closure R(i, j) && R(j, k) => R(i, k), - j must be the outer loop. - * tests/regression.at (Broken Closure): New. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * tests/atlocal.in (CPPFLAGS): Do not leave a space between -I and - its argument. - Reported by Peter Hamorsky. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (err_table): Remove. - (resolve_sr_conflict): Adjust. - * src/lalr.h (state_t.reduction_table, state_t.shift_table): - Rename as... - (state_t.reductions, state_t.shifts): this. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/reduce.c (reduce_grammar_tables): No longer disable the - removal of useless rules via CPP but via `if (0)', so that the - compiler still check the code is valid. - For instance, it should have noticed `rline' no longer exists: use - the `line' member of rule_t. - * src/gram.c (dummy, rline): Remove, unused. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/output.c (pack_vector): Use assert, not berror. - * src/main.c (berror): Remove, unused. - -2001-12-05 Akim Demaille <akim@epita.fr> - - New experimental feature: if --verbose --trace output all the - items of a state, not only its kernel. - - * src/print.c (print_core): If `trace_flag', then invoke closure - before outputting the items of the state (print_core is no longer - a correct name them). - (print_results): Invoke new_closure/free_closure if needed. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/LR0.c (new_itemsets): Use nshifts only, not shiftcount. - * src/closure.c, src/closure.h (itemsetsize): Rename as... - (nitemset): for consistency with the rest of the project. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/closure.c (print_closure): Improve. - (closure): Use it for printing input and output. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/closure.c (FIRSTS, FDERIVES): Adjust to reality: they are - indexed by nonterminals. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/warshall.c (TC, RTC): De-obsfucate (source reduced to 22% of - what it was!). - * src/warshall.h: Remove accidental duplication of the content. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/closure.c (set_fderives): De-obfuscate. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/closure.c (print_firsts, print_fderives): De-obfuscate. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/closure.c (set_firsts): De-obfuscate. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/output.c (action_row): De-obfuscate - using the good o' techniques: arrays not pointers, variable - locality, BITISSET, RESETBIT etc. - -2001-12-05 Akim Demaille <akim@epita.fr> - - Pessimize the code to simplify it: from now on, all the states - have a valid SHIFTS, which NSHIFTS is possibly 0. - - * src/LR0.c (shifts_new): Be global and move to.. - * src/state.c, src/state.h: here. - * src/conflicts, src/lalr.c, src/output.c, src/print.c, - * src/print_graph: Adjust. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/state.h (SHIFT_DISABLE, SHIFT_IS_DISABLED): New. - * src/conflicts.c: Use it. - Restore a few missing `if (!SHIFT_IS_DISABLED)' which were - incorrectly ``simplified''. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (flush_shift, resolve_sr_conflict): De-obfuscate - using the good o' techniques: arrays not pointers, variable - locality, BITISSET, RESETBIT etc. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/state.h (SHIFT_SYMBOL): New. - * src/conflicts.c: Use it to deobfuscate. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (count_sr_conflicts, count_rr_conflicts) - (print_reductions): De-obfuscate using the good o' techniques: - arrays not pointers, variable locality, BITISSET. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (print_reductions): Arrays, not pointers. - Use BITISSET. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (print_reductions): Pessimize, but clarify. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (print_reductions): Improve variable locality. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (print_reductions): Pessimize, but clarify. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (print_reductions): Improve variable locality. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/state.h (SHIFT_IS_ERROR, SHIFT_IS_GOTO, SHIFT_IS_SHIFT): New. - * src/lalr.c: Use them. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/LR0.c (augment_automaton): Formatting changes. - Better variable locality. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/lalr.c (matrix_print): New. - (transpose): Use it. - Use arrays instead of pointers. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/lalr.c (maxrhs): Move to... - * src/gram.c, src/gram.h (ritem_longest_rhs): here. - * src/lalr.c (build_relations): Adjust. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/lalr.c (transpose): Free the memory allocated to the - argument, as it is replaced by the results by the unique caller. - (build_relations): Merely invoke transpose: it handles the memory - deallocation. - Improve variable locality. - Avoid variables used as mere abbreviations. - (compute_lookaheads): Use arrays instead of pointers. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/lalr.c (initialize_F): Improve variable locality. - Avoid variables used as mere abbreviations. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/derives.c (print_derives): Display the ruleno. - * src/lalr.c (initialize_F, transpose): Better variable locality - to improve readability. - Avoid variables used as mere abbreviations. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/lalr.c (traverse): Use arrays instead of pointers. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/nullable.c (set_nullable): Use a for loop to de-obfuscate - the handling of squeue. - `symbol >= 0' is wrong now, use `rule_table[ruleno].useful'. - -2001-12-05 Akim Demaille <akim@epita.fr> - - Because useless nonterminals are now kept alive (instead of being - `destroyed'), we now sometimes examine them, and store information - related to them. Hence we need to know their number, and adjust - memory allocations. - - * src/reduce.c, src/reduce.h (nuseless_nonterminals): No longer - static. - * src/LR0.c (allocate_itemsets): The memory allocated to - `symbol_count' was used for two different purpose: once to count - the number of occurrences of each symbol, and later reassigned to - `shift_symbol', containing the symbol that can be shifted from a - given state. - Deobfuscate, i.e., allocate, use and free `symbol_count' here - only, and... - (new_itemsets): Allocate `shift_symbol' here. - (allocate_itemsets): symbol_count includes useless nonterminals. - Make room for them. - (free_storage): Use `free', not `XFREE', for pointers that cannot - be null. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/nullable.c (set_nullable): Deobfuscate the handling of - ritem. - `symbol >= 0' is wrong now, use `rule_table[ruleno].useful'. - -2001-12-05 Akim Demaille <akim@epita.fr> - - * src/gram.c, src/gram.h (ritem_print): New. - * src/gram.c (dummy): Remove, now there is actual code in gram.c. - (This useless function was defined only to work around VMS linkers - that can't handle compilation units with variables only). - * src/reduce.c (dump_grammar): Use it to trace the construction of - ritem. - -2001-12-04 Paul Eggert <eggert@twinsun.com> - - * src/bison.simple (union yyalloc): Change member names - to be the same as the stack names. - (yyparse): yyptr is now union yyalloc *, not char *. - (YYSTACK_RELOCATE): Likewise. This avoids a GCC warning, - and may generate better code on some machines. - (yystpcpy): Use prototype if __STDC__ is defined, not just - if __cplusplus is defined. - -2001-11-30 Akim Demaille <akim@epita.fr> - - * configure.in (WARNING_CFLAGS): Add -Werror when possible. - (CFLAGS): Do not include the WARNING_CFLAGS here, since GNU - Gettext doesn't compile cleanly, and dies with -Werror. - * src/Makefile.am, lib/Makefile.am, tests/atlocal.in (CFLAGS): - Include WARNING_CFLAGS here. - * lib/xstrdup.c: Include xalloc.h, so that xstrdup be declared - before being defined. - -2001-11-27 Paul Eggert <eggert@twinsun.com> - - * lib/quotearg.h (quotearg_n, quotearg_n_style): - First arg is int, not unsigned. - * lib/quotearg.c (quotearg_n, quotearg_n_style): Likewise. - (SIZE_MAX, UINT_MAX): New macros. - (quotearg_n_options): Abort if N is negative. - Avoid overflow check on hosts where size_t is 64 bits and int - is 32 bits, as overflow is impossible there. - Fix off-by-one typo that caused unnecessary reallocation. - -2001-11-29 Paul Eggert <eggert@twinsun.com> - - Name space cleanup in generated parser. - - * doc/bison.texinfo (Bison Parser): Discuss system headers - and their effect on the user name space. - - * src/bison.simple: - (YYSTACK_ALLOC, YYSTACK_FREE, union yyalloc, YYSTACK_GAP_MAX, - YYSTACK_BYTES, YYSTACK_RELOCATE): Do not define unless necessary, - i.e. unless ! defined (yyoverflow) || defined (YYERROR_VERBOSE). - - (YYSIZE_T): New macro. Use it instead of size_t, to avoid infringing - on user names when possible. - - (YYSTACK_USE_ALLOCA): Do not define; just use any existing defn. - Simplify test for whather <alloca.h> exists. - - (<stdlib.h>): Include if we will use malloc, and if standard C or C++. - - (<stdio.h>): Include if YYDEBUG. - - (yymemcpy): Renamed from __yy_memcpy. Do not define unless - ! defined (yyoverflow) && ! defined (yymemcpy). - - (yymemcpy, yyparse): Rename local variables as needed so that - they all begin with 'yy'. - - (yystrlen, yystpcpy): New functions. - - (YY_DECL_NON_LSP_VARIABLES): Renamed from _YY_DECL_VARIABLES. - All uses changed. - - (yyparse): size_t -> YYSIZE_T. Use yystrlen and yystpcpy - instead of relying on string.h functions. Use YYSTACK_ALLOC - and YYSTACK_FREE instead of malloc and free. - -2001-11-30 Akim Demaille <akim@epita.fr> - - * src/bison.simple (YYSTYPE, YYLTYPE): Move their definitions - before their first uses. - (YYBISON, YYPURE): Move to the top of the output. - -2001-11-30 Akim Demaille <akim@epita.fr> - - * tests/reduce.at (Useless Nonterminals): Fix. - -2001-11-30 Akim Demaille <akim@epita.fr> - - * src/bison.simple (YYSTACK_FREE): Use `do {;} while (0)' as empty - if body instead of `;' to pacify GCC's warnings. - -2001-11-30 Akim Demaille <akim@epita.fr> - - Instead of mapping the LHS of unused rules to -1, keep the LHS - valid, but flag the rules as invalid. - - * src/gram.h (rule_t): `useful' is a new member. - * src/print.c (print_grammar): Adjust. - * src/derives.c (set_derives): Likewise. - * src/reader.c (packgram, reduce_output): Likewise. - * src/reduce.c (reduce_grammar_tables): Likewise. - * tests/reduce.at (Underivable Rules, Useless Rules): New. - -2001-11-30 Akim Demaille <akim@epita.fr> - - * src/reduce.c (reduce_output): Formatting changes. - * src/print.c (print_results, print_grammar): Likewise. - * tests/regression.at (Rule Line Numbers) - (Solved SR Conflicts, Unresolved SR Conflicts): Adjust. - -2001-11-30 Akim Demaille <akim@epita.fr> - - * src/reduce.c (nonterminals_reduce): Instead of throwing away - useless nonterminals, move them at the end of the symbol arrays. - (reduce_output): Adjust. - * tests/reduce.at (Useless Nonterminals): Adjust. - -2001-11-30 Akim Demaille <akim@epita.fr> - - * src/reduce.c: Various comment/formatting changes. - (nonterminals_reduce): New, extracted from... - (reduce_grammar_tables): here. - (reduce_grammar): Call nonterminals_reduce. - -2001-11-29 Paul Eggert <eggert@twinsun.com> - - * src/bison.simple (YYSTACK_REALLOC): Remove. - (YYSTACK_ALLOC): Resurrect this macro, with its old meaning. - (YYSTACK_FREE, YYSTACK_GAP_MAX, YYSTACK_BYTES, YYSTACK_RELOCATE): - New macros. - (union yyalloc): New type. - (__yy_memcpy): Last arg is size_t, not unsigned int, to remove - an arbitrary restriction on hosts where size_t is wider than int. - - (yyparse): Don't dump core if alloca or malloc fails; instead, report - a parser stack overflow. Allocate just one block of memory for all - three stacks, instead of allocating three blocks; this typically is - faster and reduces fragmentation. - - Do not limit the number of items in the stack to a value that fits - in 'int', as this is an arbitrary limit on hosts with 64-bit - size_t and 32-bit int. - -2001-11-29 Marc Autret <autret_m@epita.fr> - - * tests/calc.at [AT_DATA_CALC_Y]: Use %error-verbose instead - of defining YYERROR_VERBOSE. - [AT_DATA]: $4 is now out of C declarations in the prologue. - -2001-11-28 Marc Autret <autret_m@epita.fr> - - * src/reader.c (parse_dquoted_param): New. - (parse_skel_decl): Use it. - * src/lex.h: Add its prototype. - * src/lex.c (literalchar): Become not static. - -2001-11-28 Marc Autret <autret_m@epita.fr> - - * src/output.h: And put its extern declaration here. - * src/output.c (error_verbose): Define here. - (prepare): Echo name modification. - * src/getargs.h: Clean its extern declaration. - * src/getargs.c (error_verbose_flag): Remove. - (getargs): Remove case 'e'. - * src/options.c (option_table): 'error-verbose' is now seen as simple - percent option. - Include output.h. - - * src/reader.c (read_declarations): Remove case tok_include. - (parse_include_decl): Remove. - * src/lex.h (token_t): Remove tok_include. - * src/options.c (option_table): 'include' is now a simple command line - option. - -2001-11-28 Marc Autret <autret_m@epita.fr> - - * src/bison.simple: Adjust muscle names. - * src/muscle_tab.c (muscle_init): Also rename the muscles. - * src/output.c (prepare): s/_/-/ for the muscles names. - (output_parser): When scanning for a muscle, allow '-' instead of '_'. - -2001-11-28 Marc Autret <autret_m@epita.fr> - - * src/bison.simple: Fix debug. - [YYERROR_VERBOSE]: Re-integrate as an internal macro. - -2001-11-28 Akim Demaille <akim@epita.fr> - - * src/LR0.c (shifts_new): New. - (save_shifts, insert_start_shift, augment_automaton): Use it. - -2001-11-28 Akim Demaille <akim@epita.fr> - - * src/closure.c (closure): `b' and `ruleno' denote the same value: - keep ruleno only. - -2001-11-28 Akim Demaille <akim@epita.fr> - - * src/closure.c (closure): Instead of looping over word in array - then bits in words, loop over bits in array. - -2001-11-28 Akim Demaille <akim@epita.fr> - - * src/closure.c (closure): No longer optimize the special case - where all the bits of `ruleset[r]' are set to 0, to make the code - clearer. - -2001-11-28 Akim Demaille <akim@epita.fr> - - * src/closure.c (closure): `r' and `c' are new variables, used to - de-obfuscate accesses to RULESET and CORE. - -2001-11-28 Akim Demaille <akim@epita.fr> - - * src/reduce.c (reduce_print): Use ngettext. - (dump_grammar): Improve the trace accuracy. - -2001-11-28 Akim Demaille <akim@epita.fr> - - * src/reduce.c (dump_grammar): Don't translate trace messages. - -2001-11-28 Akim Demaille <akim@epita.fr> - - * tests/reduce.at (Useless Terminals, Useless Nonterminals): New. - * src/reduce.c (reduce_grammar_tables): Do not free useless tags, - as all tags are free'ed afterwards. - From Enrico Scholz. - -2001-11-27 Paul Eggert <eggert@twinsun.com> - - * src/bison.simple (YYSTACK_REALLOC): Fix typo that caused us to - use alloca when we didn't want to, and vice versa. - -2001-11-27 Marc Autret <autret_m@epita.fr> - - * src/muscle_tab.c (muscle_init): Remove 'verbose' muscle - initialization. - * src/output.c (prepare): Remove its update. - -2001-11-27 Marc Autret <autret_m@epita.fr> - - * tests/torture.at [AT_DATA]: Remove YYERROR_VERBOSE definition. - Use %error-verbose. - -2001-11-27 Marc Autret <autret_m@epita.fr> - - * src/bison.simple: Remove YYERROR_VERBOSE using. - Use %%error_verbose. - (yyparse): Likewise. - * src/output.c (prepare): Give its final value. - * src/muscle_tab.c (muscle_init): Init new muscle 'error_verbose'. - * src/getargs.h: Add its extern declaration. - * src/getargs.c (error_verbose_flag): New int. - (getargs): Update to catch new case. - * src/options.c (option_table): 'error-verbose' is a new option. - (shortopts): Update. - -2001-11-27 Akim Demaille <akim@epita.fr> - - * src/system.h: Use intl/libgettext.h. - * src/Makefile.am (INCLUDES): Add -I $(top_srcdir). - -2001-11-27 Akim Demaille <akim@epita.fr> - - * tests/torture.at (Exploding the Stack Size with Malloc): - s/YYSTACK_USE_ALLOCA_ALLOCA/YYSTACK_USE_ALLOCA/. - -2001-11-27 Akim Demaille <akim@epita.fr> - - * src/files.c: Include error.h. - Reported by Hans Aberg. - -2001-11-26 Marc Autret <autret_m@epita.fr> - - * src/reader.c (parse_include_decl): New, not yet implemented. - (read_declarations): Add case tok_include. - * src/getargs.h (include): Add its extern definition. - * src/getargs.c (include): New const char *. - (getargs): Add case '-I'. - * src/options.c (option_table): Add include as command line and - percent option. - * src/lex.h (token_t): Add tok_include. - -2001-11-26 Akim Demaille <akim@epita.fr> - - * src/reader.c (readgram): Make sure rules for mid-rule actions - have a lineno equal to that of their host rule. - Reported by Hans Aberg. - * tests/regression.at (Rule Line Numbers): New. - -2001-11-26 Akim Demaille <akim@epita.fr> - - * src/LR0.c (allocate_itemsets): kernel_size contains ints, not - size_ts. - -2001-11-26 Akim Demaille <akim@epita.fr> - - * src/complain.c, src/complain.h (error): Remove, provided by - lib/error.[ch]. - -2001-11-26 Akim Demaille <akim@epita.fr> - - * src/reader.c (read_declarations): Don't abort on tok_illegal, - issue an error message. - * tests/regression.at (Invalid %directive): New. - Reported by Hans Aberg. - -2001-11-26 Akim Demaille <akim@epita.fr> - - * configure.in: Invoke AC_FUNC_OBSTACK and AC_FUNC_ERROR_AT_LINE. - * lib/Makefile.am (libbison_a_SOURCES): Adjust. - -2001-11-26 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (conflicts_print): Don't complain at all when - there are no reduce/reduce conflicts, and as many shift/reduce - conflicts as expected. - * tests/regression.at (%expect right): Adjust. - -2001-11-23 Akim Demaille <akim@epita.fr> - - * lib/alloca.c: Update, from fileutils. - -2001-11-23 Akim Demaille <akim@epita.fr> - - * lib/Makefile.am (libbison_a_LIBADD): Add @ALLOCA@. - -2001-11-23 Akim Demaille <akim@epita.fr> - - * src/system.h: Include alloca.h. - * src/main.c (main) [C_ALLOCA]: Call alloca (0). - -2001-11-23 Akim Demaille <akim@epita.fr> - - * src/print_graph.c (print_actions): Remove `rule', unused. - * src/LR0.c (kernel_size): Contain `int' instead of `size_t' to - pacify GCC's signed < unsigned warnings. - * src/closure.c (itemsetsize): Likewise. - * src/reader.c (symbol_list_new): Static. - -2001-11-23 Akim Demaille <akim@epita.fr> - - Attaching lineno to buckets is stupid, since only one copy of each - symbol is kept, only the line of the first occurrence is kept too. - - * src/symtab.h, src/symtab.c (bucket): Remove the line member. - * src/reader.c (rline_allocated): Remove, unused. - (symbol_list): Have a `line' member. - (symbol_list_new): New. - (readgram): Use it. - * src/print.c (print_grammar): Output the rule line numbers. - * tests/regression.at (Solved SR Conflicts) - (Unresolved SR Conflicts): Adjust. - Reported by Hans Aberg. - -2001-11-22 Marc Autret <autret_m@epita.fr> - - * src/bison.simple [YYERROR_VERBOSE]: Force its value to be 1 or 0. - -2001-11-22 Marc Autret <autret_m@epita.fr> - - * src/muscle_tab.c (muscle_init): Remove initialization of - skeleton muscle. - * src/output.c (output_master_parser): Do it here. - -2001-11-20 Akim Demaille <akim@epita.fr> - - * po/sv.po: New. - * configure.in (ALL_LINGUAS): Adjust. - * po/POTFILE.in: Remove `nullable.c' and `derives.c' which no - longer contains strings to translate. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (conflicts_print): Add a missing \n. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/nullable.c (nullable_print): New. - (set_nullable): Call it when tracing. - Better locality of variables. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/print.c (print_actions): Better locality of variables. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/derives.c (print_derives): Fix and enrich. - * src/closure.c (print_fderives): Likewise. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/closure.c (itemsetend): Remove, replaced with... - (itemsetsize): new. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/LR0.c (kernel_end): Remove, replaced with... - (kernel_size): new. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (set_conflicts): Use arrays instead of pointers - to clarify. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/closure.c (closure): Use arrays instead of pointers to clarify. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/closure.c, src/derives.c, src/nullable.c: Adjust various - trace messages. - * src/LR0.c: Likewise. - (allocate_itemsets): Use arrays instead of pointers to clarify. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/getargs.c (statistics_flag): Replace with... - (trace_flag): New. - (longopts): Accept --trace instead of --statistics. - * src/getargs.h, src/options.c: Adjust. - * src/LR0.c, src/closure.c, src/derives.c, src/nullable.c, - * src/reduce.c: Use trace_flags instead of the CPP conditional TRACE. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/LR0.c (new_itemsets, get_state): Use more arrays and fewer - pointers to clarify the code. - (save_reductions, save_shifts): Factor common parts of alternatives. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/LR0.c (new_state, get_state): Complete TRACE code. - * src/closure.c: Include `reader.h' to get `tags', needed by the - trace code. - Rename the conditional DEBUG as TRACE. - Output consistently TRACEs to stderr, not stdout. - * src/derives.c: Likewise. - * src/reduce.c: (inaccessable_symbols): Using if is better style - than goto. - Use `#if TRACE' instead of `#if 0' for tracing code. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/system.h (LIST_FREE, shortcpy): New. - * src/LR0.c: Use them. - * src/output.c (free_itemsets, free_reductions, free_shifts): - Remove, replaced by LIST_FREE. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/state.h (CORE_ALLOC, SHIFTS_ALLOC, ERRS_ALLOC) - (REDUCTIONS_ALLOC): New. - * src/LR0.c, src/conflicts.c: Use them to de-obfuscate memory - allocation. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/LR0.c (new_state): Complete trace code. - * src/nullable.c (set_nullable): Don't translate traces. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/print_graph.c (print_core): Better locality of variables. - * src/print.c (print_core): Likewise. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/vcg.c: You do the output, so you are responsible of the - handling of VCG syntax, in particular: use quotearg. - * src/print_graph.c: Don't. - (print_actions): Don't output the actions as part of the nodes, - since that's the job of the edges. - (print_state): Don't output by hand: fill the node description, - and ask for its output. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/bison.simple (yyparse): When verbosely reporting an error, - no longer put additional quotes around token names. - * tests/calc.at: Adjust. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/symtab.h, src/symtab.c: `line' is a new member of `bucket'. - * src/reader.c (record_rule_lines, rline, rline_allocated): Remove. - * src/output.c: Adjust. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/gram.h (rprec, rprecsym, rassoc): Remove, now part of... - (rule_t): this. - * src/conflicts.c, src/reader.c, src/reduce.c: Adjust. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/gram.h (rule_t): New. - (rule_table): New. - (rrhs, rlhs): Remove, part of state_t. - * src/print_graph.c, src/closure.c, src/conflicts.c, src/derives.c, - * src/lalr.c, src/nullable.c, src/output.c, src/print.c, - * src/reader.c, src/reduce.c: Adjust. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/reader.c (symbols_output): New, extracted from... - (packsymbols): Here. - (reader): Call it. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/lalr.c (set_maxrhs, maxrhs): Remove, replaced with... - (maxrhs): this new function. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/lalr.c (F): New macro to access the variable F. - Adjust. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/lalr.h (LA): New macro to access the variable LA. - * src/output.c, src/lalr.c, src/print_graph.c, src/conflicts.c: - * src/lalr.c: Adjust. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/lalr.c (initialize_LA): Only initialize LA. Let... - (set_state_table): handle the `lookaheads' members. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/lalr.h (lookaheads): Removed array, whose contents is now - a member of... - (state_t): this structure. - * src/output.c, src/lalr.c, src/print_graph.c, src/conflicts.c: - Adjust. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/lalr.h (consistent): Removed array, whose contents is now - a member of... - (state_t): this structure. - * src/output.c, src/lalr.c, src/print_graph.c, src/conflicts.c: - Adjust. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/lalr.h (reduction_table, shift_table): Removed arrays, whose - contents are now members of... - (state_t): this structure. - * src/output.c, src/lalr.c, src/print_graph.c, src/conflicts.c: - Adjust. - -2001-11-19 Akim Demaille <akim@epita.fr> - - * src/lalr.h (state_t): New. - (state_table): Be a state_t * instead of a core **. - (accessing_symbol): Remove, part of state_t. - * src/lalr.c: Adjust. - (set_accessing_symbol): Merge into... - (set_state_table): this. - * src/print_graph.c, src/conflicts.c: Adjust. - -2001-11-14 Akim Demaille <akim@epita.fr> - - * tests/calc.at, tests/output.at, tests/regression.at, - * tests/testsuite.at, tests/torture.at: Rely on Autotest 2.52g: - now the tests are run in private dirs, therefore AC_CLEANUP and - family can be simplified to 0-ary. - * tests/atlocal.in: Now that we run `elsewhere' than in tests/, - use abs. path to find config.h. - * tests/calc.at (AT_CHECK_CALC): Don't try to check the compiler's - stderr, there can be way too much random noise. - Instead pass -Werror to GCC and rely on the exit status. - Reported by Wolfram Wagner. - -2001-11-14 Akim Demaille <akim@epita.fr> - - * src/bison.simple (yyparse): Let yyls1, yyss1 and yyvs1 be - defined only if yyoverflow is defined, to avoid `warning: unused - variable `yyvs1''. - Reported by The Test Suite. - -2001-11-14 Akim Demaille <akim@epita.fr> - - * src/print.c: Include reduce.h. - Reported by Hans Aberg. - -2001-11-14 Akim Demaille <akim@epita.fr> - - * src/lex.c, src/lex.h (token_buffer, unlexed_token_buffer): - Revert a previous patch: these are really const. - * src/conflicts.c (conflict_report): Additional useless pair of - braces to pacify GCC's warnings for `if () if () {} else {}'. - * src/lex.c (parse_percent_token): Replace equal_offset with - arg_offset. - arg is const. - Be sure to strdup `arg' when used, since there is no reason for - token_buffer not to change. - -2001-11-14 Akim Demaille <akim@epita.fr> - - * src/system.h (EXIT_SUCCESS, EXIT_FAILURE): Ensure a proper - definition. - * src/main.c (main): Use them. - Suggested by Hans Aberg. - -2001-11-12 Akim Demaille <akim@epita.fr> - - * src/system.h (ngettext): Now that we use ngettext, be sure to - provide a default definition when NLS are not used. - -2001-11-12 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo: Use `$' as shell prompt, not `%'. - Use @kbd to denote user input. - (Language and Grammar): ANSIfy the example. - Adjust its layout for info/notinfo. - (Location Tracking Calc): Output error messages to stderr. - Output locations in a more GNUtically correct way. - Fix a couple of Englishos. - Adjust @group/@end group pairs. - -2001-11-12 Akim Demaille <akim@epita.fr> - - %expect was not functioning at all. - - * src/conflicts.c (expected_conflicts): Set to -1. - (conflict_report): Use ngettext. - (conflicts_print): Check %expect and make its violation an error. - * doc/bison.texinfo (Expect Decl): Adjust. - * configure.in (AM_GNU_GETTEXT): Ask for ngettext. - * tests/regression.at (%expect not enough, %expect right) - (%expect too much): New. - -2001-11-12 Akim Demaille <akim@epita.fr> - - * tests/regression.at (Conflicts): Rename as... - (Unresolved SR Conflicts): this. - (Solved SR Conflicts): New. - -2001-11-12 Akim Demaille <akim@epita.fr> - - * src/reduce.c (print_results): Rename as... - (reduce_output): This. - Output to OUT, passed as argument, instead of output_obstack. - (dump_grammar): Likewise. - (reduce_free): New. - Also free V1. - (reduce_grammar): No longer call reduce_output, since... - * src/print.c (print_results): do it. - * src/main.c (main): Call reduce_free; - -2001-11-12 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (print_reductions): Accept OUT as argument. - Output to it, not to output_obstack. - * src/print.c (print_actions): Adjust. - -2001-11-12 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (count_sr_conflicts, count_rr_conflicts): Return - the result instead of using... - (src_total, rrc_total, src_count, rrc_count): Remove. - (any_conflicts): Remove. - (print_conflicts): Split into... - (conflicts_print, conflicts_output): New. - * src/conflicts.h: Adjust. - * src/main.c (main): Invoke both conflicts_output and conflicts_print. - * src/print.c (print_grammar): Issue `\n' between two rules. - * tests/regression.at (Conflicts): New. - Reported by Tom Lane. - -2001-11-12 Akim Demaille <akim@epita.fr> - - * tests/regression.at (Invalid input): Remove, duplicate with - ``Invalid input: 1''. - -2001-11-12 Akim Demaille <akim@epita.fr> - - * tests/torture.at (AT_DATA_STACK_TORTURE) - (Exploding the Stack Size with Alloca) - (Exploding the Stack Size with Malloc): New. - -2001-11-12 Akim Demaille <akim@epita.fr> - - * src/bison.simple (YYSTACK_REALLOC): New. - (yyparse) [!yyoverflow]: Use it and free the old stack. - Reported by Per Allansson. - -2001-11-12 Pascal Bart <pascal.bart@epita.fr> - - * src/bison.simple: Define type yystype instead of YYSTYPE, and - define CPP macro, which substitute YYSTYPE by yystype. - * src/reader.c (parse_union_decl): Output yystype/YYSTYPE as we do - with yyltype/YYLTYPE. This allows inclusion of the generated - header within the parser if the compiler, such as GGC, accepts - multiple equivalent #defines. - From Akim. - -2001-11-05 Akim Demaille <akim@epita.fr> - - * src/reader.c (symbols_output): New, extracted from... - (packsymbols): here. - (reader): Adjust. - -2001-11-05 Akim Demaille <akim@epita.fr> - - * src/lex.c (parse_percent_token): s/quotearg/quote/. - -2001-11-05 Akim Demaille <akim@epita.fr> - - * tests/regression.at (AT_TEST_CPP_GUARD_H): Adjust the clean up - pattern. - -2001-11-05 Akim Demaille <akim@epita.fr> - - * src/options.h (struct option_table_struct): set_flags is void*. - * src/options.c (longopts): Support `--output' and `%output'. - (usage): Adjust. - * src/lex.h (tok_setopt): Remove, replaced with... - (tok_intopt, tok_stropt): these new guys. - * src/lex.c (getopt.h): Not needed. - (token_buffer, unlexed_token_buffer): Not const. - (percent_table): Promote `-' over `_' in directive names. - Active `%name-prefix', `file-prefix', and `output'. - (parse_percent_token): Accept possible arguments to directives. - Promote `-' over `_' in directive names. - -2001-11-04 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Decl Summary): Split the list into - `directives for grammars' and `directives for bison'. - Sort'em. - Add description of `%name-prefix', `file-prefix', and `output'. - Promote `-' over `_' in directive names. - (Bison Options): s/%locactions/%locations/. Nice Freudian slip. - Simplify the description of `--name-prefix'. - Promote `-' over `_' in directive names. - Promote `--output' over `--output-file'. - Fix the description of `--defines'. - * tests/output.at: Exercise %file-prefix and %output. - -2001-11-02 Akim Demaille <akim@epita.fr> - - * doc/refcard.tex: Update. - -2001-11-02 Akim Demaille <akim@epita.fr> - - * src/symtab.h (SUNDEF): New. - * src/symtab.c (bucket_new): Init user_token_number to SUNDEF to - stand for `uninitialized', instead of 0. - * src/reader.c (packsymbols, parse_thong_decl): Adjust. - * src/lex.c (lex): Adjust. - - * tests/calc.at (_AT_DATA_CALC_Y): Declare a token for EOF. - Number it 0. - Let yylex return it instead of a plain 0. - Reported by Dick Streefland. - -2001-11-02 Akim Demaille <akim@epita.fr> - - * tests/regression.at (Mixing %token styles): New test. - -2001-11-02 Akim Demaille <akim@epita.fr> - - * src/reader.c (parse_thong_decl): Formatting changes. - (token_translations_init): New, extracted from... - (packsymbols): Here. - Adjust. - -2001-11-01 Akim Demaille <akim@epita.fr> - - * tests/regression.at (AT_TEST_CPP_GUARD_H): New. - Check that `9foo.y' produces correct cpp guards. - * src/files.c (compute_header_macro): Prepend `BISON_' to CPP - guards. - Reported by Wwp. - -2001-11-01 Akim Demaille <akim@epita.fr> - - * tests/regression.at (Invalid input: 2): New. - * src/lex.c (unlexed_token_buffer): New. - (lex, unlex): Adjust: when unlexing, be sure to save token_buffer - too. - Reported by Wwp. - -2001-11-01 Akim Demaille <akim@epita.fr> - - * tests/calc.at: Catch up with 1.30. - * configure.in: Bump to 1.49a. - Adjust to newer Autotest. - -2001-10-19 Pascal Bart <pascal.bart@epita.fr> - - * src/conflicts.c: Move global variables rrc_total and src_total ... - (print_conflicts): here. - * src/output.c (output): Free global variable user_toknums. - * src/lex.c (token_obstack): Become static. - -2001-10-18 Akim Demaille <akim@epita.fr> - - * tests/atlocal.in (GCC): Add. - * tests/calc.at: s/m4_match/m4_bmatch/. - s/m4_patsubst/m4_bpatsubst/. - (AT_CHECK_CALC): Check the compiler's stderr only if it's GCC. - * configure.in: AC_SUBST(GCC). - -2001-10-14 Marc Autret <autret_m@epita.fr> - - * src/options.c (create_long_option_table): Fix. - -2001-10-10 Akim Demaille <akim@epita.fr> - - * src/bison.simple: Be sure to set YYSTACK_USE_ALLOCA. - -2001-10-04 Akim Demaille <akim@epita.fr> - - * src/reader.c (parse_union_decl): Push the caracters in - union_obstack, not attrs_obstack. - -2001-10-04 Akim Demaille <akim@epita.fr> - - Merge in the branch 1.29. - - * src/reader.c (packsymbols): Use a temporary obstack for - `%%tokendef', since output_stack is already used elsewhere. - - 2001-10-02 Akim Demaille <akim@epita.fr> - - Bump 1.29d. - - 2001-10-02 Akim Demaille <akim@epita.fr> - - Version 1.29c. - - 2001-10-02 Akim Demaille <akim@epita.fr> - - * tests/regression.at (Invalid CPP headers): New. - From Alexander Belopolsky. - * src/files.c (compute_header_macro): Map non alnum chars to `_'. - - 2001-10-02 Akim Demaille <akim@epita.fr> - - * tests/regression.at (Invalid input): New. - * src/lex.c (lex): Be sure to set `token_buffer' in any case. - Reported by Shura. - - 2001-10-02 Akim Demaille <akim@epita.fr> - - * tests/calc.at: Now that --debug works, the tests must be adjusted. - - 2001-10-02 Akim Demaille <akim@epita.fr> - - * src/output.c (output_parser): Assert `skeleton'. - * src/files.c (skeleton_find): Look harder for skeletons on DOSish - systems. - From Shura. - - 2001-10-01 Marc Autret <autret_m@epita.fr> - - * src/lex.h: Echo modifications. - * src/lex.c (unlex): Parameter is now token_t. - From Hans Aberg. - - 2001-10-01 Marc Autret <autret_m@epita.fr> - - * src/main.c: Include lex.h. - From Hans Aberg. - - 2001-09-29 Akim Demaille <akim@epita.fr> - - * src/getargs.c (longopts): `--debug' is `-t', not `-d'. - - 2001-09-28 Akim Demaille <akim@epita.fr> - - * tests/testsuite.at: Update to newer Autotest. - * tests/Makefile.am (EXTRA_DIST): bison is not to be shipped. - - 2001-09-27 Akim Demaille <akim@epita.fr> - - Position independent wrapper. - - * tests/bison: Remove. - * tests/bison.in: New. - * configure.in: Adjust. - - 2001-09-27 Paul Eggert <eggert@twinsun.com> - - Port quotearg fixes from tar 1.13.24. - - * lib/quotearg.c: BSD/OS 4.1 wchar.h requires FILE and struct - tm to be declared. - (HAVE_MBSINIT): Undef if !HAVE_MBRTOWC. - (mbsinit): Define to 1 if !defined mbsinit && !HAVE_MBSINIT. - - * m4/Makefile.am (EXTRA_DIST): Add mbrtowc.m4. - * m4/mbrtowc.m4: New file. - * m4/prereq.m4 (jm_PREREQ_QUOTEARG): Check for mbsinit and stddef.h. - Use jm_FUNC_MBRTOWC instead of AC_CHECK_FUNCS(mbrtowc). - - 2001-09-27 Akim Demaille <akim@epita.fr> - - Bump to 1.29c. - - 2001-09-27 Akim Demaille <akim@epita.fr> - - Version 1.29b. - - 2001-09-25 Akim Demaille <akim@epita.fr> - - * src/system.h: Include `xalloc.h'. - Remove it from the C files. - * src/files.c (output_files): Free the obstacks. - * src/lex.c (init_lex): Rename as... - (lex_init): this. - (lex_free): New. - * src/main.c (main): Use it. - - 2001-09-24 Marc Autret <autret_m@epita.fr> - - * src/vcg.c (open_edge, close_edge, open_node, close_node): Change - to output informations in fout (FILE*). - (open_graph, close_graph): Likewise. - (output_graph, output_edge, output_node): Likewise. - * src/vcg.h: Update function prototypes. - * src/print_graph.c (print_graph): Open output graph file. - (print_actions): Adjust. - * src/files.h: Remove extern declaration. - * src/files.c: Remove graph_obstack declaration. - (open_files): Remove graph_obstack initialization. - (output_files): Remove graph_obstack saving. - - 2001-09-24 Marc Autret <autret_m@epita.fr> - - * src/files.c (compute_output_file_names): Fix. - - 2001-09-24 Marc Autret <autret_m@epita.fr>, - Akim Demaille <akim@epita.fr> - - * src/reader.c (reader): Remove call to free_symtab (). - * src/main.c (main): Call it here. - Include symtab.h. - * src/conflicts.c (initialize_conflicts): Rename as... - (solve_conflicts): this. - * src/print.c (print_core, print_actions, print_state) - (print_grammar): Dump to a file instead a `output_obstack'. - (print_results): Dump `output_obstack', and then proceed with the - FILE *. - * src/files.c (compute_output_file_names, close_files): New. - (output_files): Adjust. - * src/main.c (main): Adjust. - - 2001-09-23 Marc Autret <autret_m@epita.fr> - - * src/files.c (compute_header_macro): Computes header macro name - from spec_defines_file when given. - - 2001-09-23 Marc Autret <autret_m@epita.fr> - - * src/files.c (output_files): Add default extensions. - - 2001-09-22 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (finalize_conflicts): Rename as... - (free_conflicts): this. - - 2001-09-22 Akim Demaille <akim@epita.fr> - - * src/gram.c (gram_free): Rename back as... - (dummy): this. - (output_token_translations): Free `token_translations'. - * src/symtab.c (free_symtab): Free the tag field. - - 2001-09-22 Akim Demaille <akim@epita.fr> - - Remove `translations' as it is always set to true. - - * src/gram.h: Adjust. - * src/reader.c (packsymbols, parse_token_decl): Adjust - * src/print.c (print_grammar): Adjust. - * src/output.c (output_token_translations): Adjust. - * src/lex.c (lex): Adjust. - * src/gram.c: Be sure the set pointers to NULL. - (dummy): Rename as... - (gram_free): this. - - 2001-09-22 Akim Demaille <akim@epita.fr> - - * configure.in: Invoke AM_LIB_DMALLOC. - * src/system.h: Use dmalloc. - * src/LR0.c: Be sure to have pointers initialized to NULL. - (allocate_itemsets): Allocate kernel_items only if needed. - - 2001-09-22 Akim Demaille <akim@epita.fr> - - * configure.in: Bump to 1.29b. - * tests/Makefile.am (DISTCLEANFILES): Add package.m4. - * tests/calc.at (_AT_DATA_CALC_Y): #undef malloc so that we don't - need xmalloc.c in calc.y. - From Pascal Bart. - - 2001-09-21 Akim Demaille <akim@epita.fr> - - Version 1.29a. - * Makefile.maint, config/config.guess, config/config.sub, - * config/missing: Update from masters. - * tests/Makefile.am ($(srcdir)/$(TESTSUITE)): No longer depend - upon package.m4. - * configure.in (ALL_LINGUAS): Add `tr'. - - 2001-09-21 Akim Demaille <akim@epita.fr> - - * tests/Makefile.am (package.m4): Move to... - ($(srcdir)/$(TESTSUITE)): here. - - 2001-09-20 Akim Demaille <akim@epita.fr> - - * src/complain.c: No longer try to be standalone: use system.h. - Don't assume __STDC__ is defined to 1. Just test if it is defined. - * src/complain.h: Likewise. - * src/reduce.c (useless_nonterminals, inaccessable_symbols): - Remove the unused variable `n'. - From Albert Chin-A-Young. - - 2001-09-18 Marc Autret <autret_m@epita.fr> - - * doc/bison.1: Update. - * doc/bison.texinfo (Bison Options): Update --defines and --graph - descriptions. - (Option Cross Key): Update. - Add --graph. - - 2001-09-18 Marc Autret <autret_m@epita.fr> - - * tests/regression.at: New test (comment in %union). - - 2001-09-18 Marc Autret <autret_m@epita.fr> - - * src/reader.c (parse_union_decl): Do not output '/'. Let copy_comment - do that. - Reported by Keith Browne. - - 2001-09-18 Marc Autret <autret_m@epita.fr> - - * tests/output.at: Add tests for --defines and --graph. - - 2001-09-18 Marc Autret <autret_m@epita.fr> - - * tests/output.at: Removes tests of %{header,src}_extension features. - - 2001-09-18 Akim Demaille <akim@epita.fr> - - * tests/Makefile.am (package.m4): New. - * tests/calc.at (_AT_CHECK_CALC): Just run `calc input'. - (_AT_CHECK_CALC_ERROR): Likewise. - Factor the `, ' part of verbose error messages. - - 2001-09-18 Marc Autret <autret_m@epita.fr> - - * src/getargs.c (longopts): Declare --defines and --graph as options - with optional arguments. - * src/files.h: Add extern declarations. - * src/files.c (spec_graph_file, spec_defines_file): New. - (output_files): Update. - Remove CPP-outed code. - - 2001-09-18 Marc Autret <autret_m@epita.fr> - - Turn off %{source,header}_extension feature. - - * src/files.c (compute_exts_from_gf): Update. - (compute_exts_from_src): Update. - (output_files): CPP-out useless code. - * src/files.h: Remove {header,source}_extension extern declarations. - * src/reader.c (parse_dquoted_param): CPP-out. - (parse_header_extension_decl): Remove. - (parse_source_extension_decl): Remove. - (read_declarations): Remove cases tok_{hdrext,srcext}. - * src/lex.c (percent_table): Remove {header,source}_extension entries. - * src/lex.h (token_t): Remove tok_hdrext and tok_srcext. - - 2001-09-10 Akim Demaille <akim@epita.fr> - - * tests/output.at (AT_CHECK_BISON_FLAGS, AT_CHECK_BISON_PERCENT): - (AT_CHECK_BISON_PERCENT_FLAGS): Merge into... - (AT_CHECK_OUTPUT): this. - Merely check ls' exit status, its output is useless. - - 2001-09-10 Akim Demaille <akim@epita.fr> - - * tests/calc.at: Use m4_match. - (_AT_DATA_CALC_Y): Check `yyin != NULL', not `stdin != NULL'. - - 2001-09-10 Marc Autret <autret_m@epita.fr>, - Akim Demaille <akim@epita.fr> - - * src/vcg.h (graph_s): color, textcolor, bordercolor are now - enum color_e. - * src/print_graph.c (print_graph): Initalize graph.layoutalgorithm - to `normal'. - * src/reader.c (parse_token_decl): Initialize token with tok_eof. - * src/lex.h: Adjust prototype. - (token_t): Add `tok_undef'. - * src/lex.c (struct percent_table_struct): Retval is now a token_t. - (parse_percent_token): Now returns token_t. - Add default statement in switch. - (lex): Separate `c' as an input variable, from the token_t result - part. - (unlexed): Is a token_t. - - 2001-09-10 Akim Demaille <akim@epita.fr> - - * configure.in: Bump to 1.29a. - - 2001-09-07 Akim Demaille <akim@epita.fr> - - Version 1.29. - - 2001-08-30 Akim Demaille <akim@epita.fr> - - * tests/atgeneral.m4, tests/atconfig.in, tests/suite.at: Remove. - * m4/atconfig.m4: Remove. - * tests/testsuite.at, tests/atlocal.in, tests/output.at, - * tests/bison: New. - * tests/regression.at, tests/calc.at: Use m4_define, AT_BANNER, - m4_if, m4_patsubst, and m4_regexp. - * tests/calc.at (_AT_CHECK_CALC, _AT_CHECK_CALC_ERROR): Use an - `input' file instead of echo. - - 2001-08-29 Akim Demaille <akim@epita.fr> - - Bump to 1.28e. - - 2001-08-29 Akim Demaille <akim@epita.fr> - - Version 1.28d. - - 2001-08-29 Paul Eggert <eggert@twinsun.com> - - * src/bison.simple (yyparse): Don't take the address of an - item before the start of an array, as that doesn't conform to - the C Standard. - - 2001-08-29 Robert Anisko <anisko_r@epita.fr> - - * doc/bison.texinfo (Location Tracking Calc): New node. - - 2001-08-29 Paul Eggert <eggert@twinsun.com> - - * src/output.c (output): Do not define const, as this now - causes more problems than it cures. - - 2001-08-29 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo: Modernize `@node' and `@top' use: just name - the nodes. - Be sure to tag the `detailmenu'. - - 2001-08-29 Akim Demaille <akim@epita.fr> - - * Makefile.maint (do-po-update): Wget refuses to overwrite files: - download in a tmp dir. - - 2001-08-28 Marc Autret <autret_m@epita.fr> - - * config/depcomp: New file. - - 2001-08-28 Marc Autret <autret_m@epita.fr> - - * doc/bison.1 (mandoc): Adjust. - From Juan Manuel Guerrero. - - 2001-08-28 Marc Autret <autret_m@epita.fr> - - * src/print_graph.c (print_state): Fix. - - 2001-08-27 Marc Autret <autret_m@epita.fr> - - * src/vcg.h (classname_s, infoname_s, node_s): Constify the - char * members. - Echo modifications to the functions prototypes. - * src/vcg.c (add_classname, add_infoname): Adjust arguments. - - 2001-08-27 Marc Autret <autret_m@epita.fr> - - * src/vcg.c: Include `xalloc.h'. - (add_colorentry): New. - (add_classname): New. - (add_infoname): New. - * src/vcg.h: Add new prototypes. - - 2001-08-27 Akim Demaille <akim@epita.fr> - - * Makefile.maint: Sync. again with CVS Autoconf. - - 2001-08-27 Akim Demaille <akim@epita.fr> - - * Makefile.maint: Formatting changes. - (po-update, cvs-update, update): New targets. - (AMTAR): Remove. - - 2001-08-27 Akim Demaille <akim@epita.fr> - - * Makefile.am (AUTOMAKE_OPTIONS): 1.5. - * Makefile.maint: Sync. with CVS Autoconf. - - 2001-08-27 Marc Autret <autret_m@epita.fr> - - * src/vcg.h (struct infoname_s): New. - (struct colorentry_s): New. - (graph_s): New fields {vertical,horizontal}_order in structure. - Add `infoname' field. - Add `colorentry' field; - * src/vcg_defaults.h (G_VERTICAL_ORDER): New. - (G_HORIZONTAL_ORDER): New. - (G_INFONAME): New. - (G_COLORENTRY): New. - * src/vcg.c (output_graph): Add output of {vertical,horizontal}_order. - Add output of `infoname'. - Add output of `colorentry'. - - 2001-08-27 Marc Autret <autret_m@epita.fr> - - * src/reader.c (parse_dquoted_param): Rename variable `index' to `i'. - This one shadowed a global parameter. - - 2001-08-24 Marc Autret <autret_m@epita.fr> - - * src/print_graph.c (node_output_size): Declared POSIX `size_t' type, - instead of `unsigned'. - (print_state): Do not call obstack_object_size () in obstack_grow () - to avoid macro variables shadowing. - - 2001-08-23 Marc Autret <autret_m@epita.fr> - - * src/lex.c (percent_table): Typo: s/naem/name/. - Add graph option. - Normalize new options declarations. - - 2001-08-20 Pascal Bart <pascal.bart@epita.fr> - - * tests/suite.at: Exercise %header_extension and %source_extension. - - 2001-08-16 Marc Autret <autret_m@epita.fr> - - * src/reader.c (parse_dquoted_param): New. - (parse_header_extension_decl): Use it. - (parse_source_extension_decl): Likewise. - - 2001-08-16 Marc Autret <autret_m@epita.fr> - - * src/vcg.c: Remove includes of `complain.h' and `xalloc.h'. - (get_xxxx_str): Use assert () instead of complain (). - Remove return invokations in default cases. - (get_decision_str): Modify default behaviour. Remove second argument. - Echo modifications on calls. - (output_graph): Fix. - - 2001-08-16 Marc Autret <autret_m@epita.fr> - - * src/getargs.c (usage): Update with ``-g, --graph''. - - 2001-08-16 Marc Autret <autret_m@epita.fr> - - * doc/bison.texinfo (Bison Options): Add items `-g', `--graph'. - (Option Cross Key): Likewise. - * doc/bison.1: Update. - -2001-09-25 Pascal Bart <pascal.bart@epita.fr> - - * src/output.c (output_master_parser): Don't finish action_obstack. - (output_parser): Don't care about the muscle action, here. - (prepare): Copy the action_obstack in the action muscle. - (output): Free action_obstack. - -2001-09-23 Pascal Bart <pascal.bart@epita.fr> - - * src/reader.c (parse_union_decl): Add new obstack union_obstack. Which - will contain `%union' declaration. - (parse_union_decl): Delete #line directive output. - (parse_union_decl): Substitute /attrs_obstack/union_obstack for all - informations about %union. - (parse_union_decl): Copy the union_obstack in the muscle stype. - * src/bison.simple: Add new #line directive. - Add typdef %%stype YYSTYPE. - -2001-09-23 Pascal Bart <pascal.bart@epita.fr> - - * src/bison.simple: Add new `#line' directive. - -2001-09-22 Pascal Bart <pascal.bart@epita.fr> - - * src/bison.simple: New `#line' directive. - * src/output.c (output_parser): Support new dynamic muscle input_line. - -2001-09-22 Marc Autret <autret_m@epita.fr> - - * src/output.c (output_master_parser): New. - (output_parser): Be more re-entrant. - -2001-09-21 Marc Autret <autret_m@epita.fr> - - * src/reader.c (copy_definition, parse_union_decl): Update and use - `linef' muscle. - (copy_action): Likewise. - Use obstack_1grow (). - * src/muscle_tab.c (muscle_init): Add muscle `linef'. - -2001-09-21 Marc Autret <autret_m@epita.fr> - - * src/options.c (option_table): Adjust. - * src/lex.c (parse_percent_token): Fix. - -2001-09-20 Pascal Bart <pascal.bart@epita.fr> - - * src/options.c (symtab.h): Include it, need by lex.h. - -2001-09-20 Pascal Bart <pascal.bart@epita.fr> - - * src/lex.c (parse_percent_token): Change type of variable `tx', which - is now an option_table_struct*. - (option_strcmp): New function option_strcmp. - (parse_percent_token): Call option_strcmp. - * src/getargs.c (xalloc.h, options.h): Include it. - (getargs): Call create_long_option_table. - (getargs): Free longopts at the end of the function. - (shortopts): Move in options.c. - * src/options.c (create_long_option_table): New function. Convert - information from option_table to option structure. - * src/reader.c (options.h): Include it. - - * src/Makefile.am: Adjust. - * src/options.c (option_table): Create from longopts and percent_table. - * src/getargs.c (longopts): Delete. - * src/lex.c (struct percent_table_struct): Delete. - (percent_table): Delete. - (options.h): Include it. - * src/options.c: Create. - * src/options.h: Create. - Declare enum opt_access_e. - Define struct option_table_struct. - -2001-09-20 Marc Autret <autret_m@epita.fr> - - * doc/bison.texinfo: Adjust terminologies about prologue and epilogue - sections of Bison. - -2001-09-19 Pascal Bart <pascal.bart@epita.fr> - - * src/bison.simple: s/%%filename/%%skeleton. - * src/muscle_tab.c (getargs.h): Include it. - (muscle_init): Insert new muscle skeleton. - -2001-09-18 Pascal Bart <pascal.bart@epita.fr> - - * src/output.c (output_parser): Delete unused variable actions_dumped. - -2001-09-07 Pascal Bart <pascal.bart@epita.fr> - - * src/output.c (output): Delete call to reader_output_yylsp. - * src/reader.c (reader): Likewise. - * src/reader.h: Delete declaration of reader_output_yylsp. - -2001-09-02 Marc Autret <autret_m@epita.fr> - - * src/reader.c: Include muscle_tab.h. - (parse_union_decl): Update. - (parse_macro_decl): Rename parse_muscle_decl. - Update to use renamed functions and variable. - (read_declarations, copy_action, read_additionnal_code, : Updated - with correct variables and functions names. - (packsymbols, reader): Likewise. - - * src/reader.h (muscle_obstack): Extern declaration update. - - * src/output.c: Include muscle_tab.h - In all functions using macro_insert, change by using muscle_insert (). - (macro_obstack): Rename muscle_obstack. - Echo modifications in the whole file. - (MACRO_INSERT_INT): Rename MUSCLE_INSERT_INT. - (MACRO_INSERT_STRING): Rename MUSCLE_INSERT_STRING. - (MACRO_INSERT_PREFIX): Rename MUSCLE_INSERT_PREFIX. - - * src/muscle_tab.h: Update double inclusion macros. - (macro_entry_s): Rename muscle_entry_s. - Update prototypes. - - * src/muscle_tab.c: Include muscle_tab.h. - Rename macro_tabble to muscle_table. - (mhash1, mhash2, mcmp): Use muscle_entry. - (macro_init): Rename muscle_init. Update. - (macro_insert): Rename muscle_insert. Update. - (macro_find): Rename muscle_find. Update. - - * src/main.c: Include muscle_tab.h. - (main): Call muscle_init (). - * src/Makefile.am (bison_SOURCES): Echo modifications. - -2001-09-02 Marc Autret <autret_m@epita.fr> - - Now the files macro_tab.[ch] are named muscle_tab.[ch]. - - * src/muscle_tab.c, src/muscle_tab.h: Add files. - -2001-09-02 Marc Autret <autret_m@epita.fr> - - * src/macrotab.c, src/macrotab.h: Remove. - -2001-09-01 Pascal Bart <pascal.bart@epita.fr> - - * src/reader.c (copy_guard): Use muscle to specify the `#line' - filename. - -2001-09-01 Marc Autret <autret_m@epita.fr> - - * tests/calc.at (exp): Now, YYERROR_VERBOSE need to be set - to an explicit value to activate the feature. We do it here. - -2001-08-31 Pascal Bart <pascal.bart@epita.fr> - - * src/output.c (prepare): Delete the `filename' muscule insertion. - * src/reader.c (copy_action): Use `filename' muscule with `#line'. - (parse_union_decl): Likewise. - * src/macrotab.c (macro_init): Initialize filename by infile. - -2001-08-31 Marc Autret <autret_m@epita.fr> - - * src/bison.simple (YYLSP_NEEDED): New definition. - * src/output.c (prepare): Add macro insertion of `locations_flag' - -2001-08-31 Pascal Bart <pascal.bart@epita.fr> - - * src/output.c (prepare): Delete insertion of previous muscles, - and insert the `prefix' muscles. - * src/macrotab.c (macro_init): Likewise. - (macro_init): Initialization prefix directive by `yy'. - * src/bison.simple: Substitute all %%yylex, %%yychar, %%yylval, - %%yydebug, %%yyerror, %%yynerrs and %%yyparse by yylex, yychar, - yylval, yydebug, yyerror, yynerrs and yyparse. - New directive `#define' to substitute yydebug, ... with option - name_prefix. - -2001-08-31 Pascal Bart <pascal.bart@epita.fr> - - * src/main.c (main): Standardize. - * src/output.c (output_table_data, output_parser): Likewise. - * src/macrotab.h, src/macrotab.c, src/bison.simple: Likewise. - -2001-08-31 Pascal Bart <pascal.bart@epita.fr>, Marc Autret <autret_m@epita.fr> - - * src/reader.c (read_additionnal_code): Rename %%user_code to - %%epilogue. - * src/output.c (output): Rename %%declarations to %%prologue. - * src/bison.simple: Echo modifications. - -2001-08-31 Marc Autret <autret_m@epita.fr> - - * src/reader.c (readgram): CleanUp. - (output_token_defines): Likewise. - (packsymbols): Likewise. - (reader): Likewise. - * src/output.c (output): CPP-out useless code. - -2001-08-31 Pascal Bart <pascal.bart@epita.fr> - - * src/reader.c (reader): Delete obsolete call to function - output_trailers and output_headers. - * src/output.h: Remove obsolete functions prototypes of output_headers - and output_trailers. - -2001-08-30 Pascal Bart <pascal.bart@epita.fr> - - * src/main.c: Include macrotab.h. - * src/macrotab.h (macro_entry_s): Constify fields. - Adjust functions prototypes. - * src/macrotab.c (macro_insert): Constify key and value. - (macro_find): Constify key. - (macro_insert): Include 'xalloc.h' - (macro_insert): Use XMALLOC. - (macro_find): Constify return value. - * src/output.c (output_table_data): Rename table to table_data. - (output_parser): Constify macro_key, macro_value. - -2001-08-30 Marc Autret <autret_m@epita.fr> - - * src/reader.c (parse_skel_decl): New. - (read_declarations): Add case `tok_skel', call parse_skel_decl (). - * src/lex.h (token_t): New token `tok_skel'. - * src/lex.c (percent_table): Add skeleton option entry. - Standardize. - -2001-08-29 Marc Autret <autret_m@epita.fr> - - * src/bison.simple: Add %%user_code directive at the end. - * src/reader.c (read_additionnal_code): New. - (reader): Use it. - * src/output.c (output_program): Remove. - (output): Update. - -2001-08-28 Marc Autret <autret_m@epita.fr> - - * src/output.c (output_actions): Clean up. - (output_gram): CPP-out useless code. - * src/reader.c (reader): Clean up, CPP-out useless code. - -2001-08-28 Pascal Bart <pascal.bart@epita.fr> - - * src/output.c (output): Copy attrs_obstack in the '%%definitions' - directive. - * src/bison.simple: Add `%%definitions'. - -2001-08-28 Marc Autret <autret_m@epita.fr> - - * config/depcomp: New file. - -2001-08-27 Paul Eggert <eggert@twinsun.com> - - * src/bison.simple (yyparse): Don't take the address of an - item before the start of an array, as that doesn't conform to - the C Standard. - -2001-08-27 Robert Anisko <robert.anisko@epita.fr> - - * src/output.c (output): Remove the initialization of the macro - obstack. It was done too late here. - - * src/reader.c (parse_macro_decl): Fix. Use of the macro obstack was - completely wrong. - (reader): Initialize the macro obstack here, since we need it to grow - '%define' directives. - - * src/reader.h: Declare the macro obstack as extern. - -2001-08-27 Robert Anisko <robert.anisko@epita.fr> - - * src/output.c (output_parser): Fix. Store single '%' characters in - the output obstack instead of throwing them away. - -2001-08-27 Akim Demaille <akim@epita.fr> - - * Makefile.am (AUTOMAKE_OPTIONS): 1.5. - -2001-08-25 Robert Anisko <robert.anisko@epita.fr> - - * lib/Makefile.am: Adjust. - -2001-08-25 Robert Anisko <robert.anisko@epita.fr> - - * src/bison.simple: Update and add '%%' directives. - -2001-08-25 Robert Anisko <robert.anisko@epita.fr> - - * src/reader.c (reader): Remove calls to 'output_headers' and - 'output_trailers'. Remove some C output. - (readgram): Disable a piece of code that was writing a default - definition for 'YYSTYPE'. - (reader_output_yylsp): Remove. - (packsymbols): Output token defintions to a macro. - (copy_definition): Disable C output. - - * src/reader.c (parse_macro_decl): New function used to parse macro - declarations. - (copy_string2): Put the body of copy_string into this new function. - Add a parameter to let the caller choose whether he wants to copy the - string delimiters or not. - (copy_string): Be a simple call to copy_string2 with the last argument - bound to true. - (read_declarations): Add case for macro definition. - (copy_identifier): New. - (parse_macro_decl): Read macro identifiers using copy_identifier - rather than lex. - -2001-08-25 Robert Anisko <robert.anisko@epita.fr> - - * src/output.c (prepare): Add prefixed names. - (output_parser): Output semantic actions. - (output_parser): Fix bug on '%%line' directives. - - * src/output.c (output_headers): Remove. The C code printed by this - function should now be in the skeletons. - (output_trailers): Remove. - (output): Disable call to 'reader_output_yylsp'. - (output_rule_data): Do not output tables to the table obstack. - - * src/output.c: Remove some C dedicated output. - Improve the use of macro and output obstacks. - (output_defines): Remove. - - * src/output.c (output_token_translations): Associate 'translate' - table with a macro. No output to the table obstack. - (output_gram): Same for 'rhs' and 'prhs'. - (output_stos): Same for 'stos'. - (output_rule_data): Same for 'r1' and 'r2'. - (token_actions): Same for 'defact'. - (goto_actions): Same for 'defgoto'. - (output_base): Same for 'pact' and 'pgoto'. - (output_table): Same for 'table'. - (output_check): Same for 'check'. - - * src/output.c (output_table_data): New function. - (output_short_table): Remove. - (output_short_or_char_table): Remove. - - * src/output.c (output_parser): Replace most of the skeleton copy code - with something new. Skeletons are now processed character by character - rather than line by line, and Bison looks for '%%' macros. This is the - first step in making Bison's output process (a lot) more flexible. - (output_parser): Use the macro table. - -2001-08-25 Robert Anisko <robert.anisko@epita.fr> - - * src/main.c (main): Initialize the macro table. - -2001-08-25 Robert Anisko <robert.anisko@epita.fr> - - * src/lex.c (percent_table): Add tok_define. - * src/lex.h: Add tok_define. - -2001-08-25 Robert Anisko <robert.anisko@epita.fr> - - * src/macrotab.c: New file. - * src/macrotab.h: New file. - * src/Makefile.am: Update. - -2001-08-25 Robert Anisko <robert.anisko@epita.fr> - - * lib/hash.c: New file. - * lib/hash.h: New file. - * lib/Makefile.am: Update. - -2001-08-15 Akim Demaille <akim@epita.fr> - - Version 1.28c. - -2001-08-15 Marc Autret <autret_m@epita.fr> - - * src/reader.c (readgram): Indent output macro YYSTYPE. - (packsymbols): Likewise. - (output_token_defines): Likewise. - * src/files.c: Standardize. - (compute_header_macro): New. - (defines_obstack_save): New. Use compute_header_macro. - (output_files): Update. Use defines_obstack_save. - -2001-08-15 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo (Table of Symbols): Document - YYSTACK_USE_ALLOCA. - -2001-08-15 Akim Demaille <akim@epita.fr> - - * missing: Update from CVS Automake. - * config/config.guess, config/config.sub, config/texinfo.tex: - Update from gnu.org. - -2001-08-15 Akim Demaille <akim@epita.fr> - - * Makefile.maint: Sync with CVS Autoconf. - -2001-08-14 Pascal Bart <pascal.bart@epita.fr> - - * doc/bison.texinfo: Include GNU Free Documentation License from - `fdl.texi'. - * doc/fdl.texi: Add to package. - -2001-08-14 Marc Autret <autret_m@epita.fr> - - Turn on %{source,header}_extension features. - - * src/lex.c (percent_table): Un-CPP out header_extension and - source_extension. - * src/files.c (compute_exts_from_gf): Compare pointers with NULL. - (compute_exts_from_src): Remove conditions. It restores priorities - between options. - -2001-08-14 Marc Autret <autret_m@epita.fr> - - * src/files.c (compute_base_names): Add extensions computing when - `--file-prefix' used. - Standardize function calls. - -2001-08-13 Marc Autret <autret_m@epita.fr> - - * src/bison.simple (YYSTACK_USE_ALLOCA): Changed to allow users - defining it (defined but null disables alloca). - -2001-08-13 Marc Autret <autret_m@epita.fr> - - * src/bison.simple (_yy_memcpy): CPP reformat. - -2001-08-13 Pascal Bart <pascal.bart@epita.fr> - - * tests/atconfig.in (CPPFLAGS): Fix. - -2001-08-10 Pascal Bart <pascal.bart@epita.fr> - - * doc/bison.texinfo: Include GNU General Public License from - `gpl.texi'. - * doc/gpl.texi: Add to package. - -2001-08-10 Marc Autret <autret_m@epita.fr> - - * src/print_graph.h: Fix. - * src/reader.c (read_declarations): Use parse_header_extension_decl (). - -2001-08-10 Akim Demaille <akim@epita.fr> - - * src/system.h: Provide default declarations for stpcpy, strndup, - and strnlen. - -2001-08-10 Robert Anisko <anisko_r@epita.fr> - - * doc/bison.texinfo (Locations): Update @$ stuff. - -2001-08-09 Robert Anisko <anisko_r@epita.fr> - - * src/bison.simple (YYLLOC_DEFAULT): Update. - (yyparse): Adjust. - -2001-08-08 Marc Autret <autret_m@epita.fr> - - * doc/bison.texinfo: Change @samp{$<@dots{}>} to - @samp{$<@dots{}>@var{n}} in Section Actions in Mid-Rule. - Reported by Fabrice Bauzac. - -2001-08-08 Marc Autret <autret_m@epita.fr> - - * src/vcg_default.h: Use NULL instead of 0 to initialize pointers. - * src/vcg.c (output_node): Fix. - * src/vcg.h: Cleanup. - * src/print_graph.c: Add comments. - (node_output_size): New global variable. Simplify the formatting of - the VCG graph output. - (print_actions): Unused code is now used. It notifies the final state - and no action states in the VCG graph. It also give the reduce actions. - The `shift and goto' edges are red and the `go to state' edges are - blue. - Get the current node name and node_obstack by argument. - (node_obstack): New variable. - (print_state): Manage node_obstack. - (print_core): Use node_obstack given by argument. - A node is not only computed here but in print_actions also. - (print_graph): CPP out useless code instead of commenting it. - -2001-08-07 Pascal Bart <pascal.bart@epita.fr> - - * tests/atconfig.in (CPPFLAGS): Fix. - -2001-08-07 Akim Demaille <akim@epita.fr> - - * src/print_graph.c (quote): New. - (print_core): Use it. - -2001-08-06 Akim Demaille <akim@epita.fr>, Marc Autret <autret_m@epita.fr> - - * src/vcg.c (complain.h): Include it. - Unepitaize `return' invocations. - [NDEBUG] (main): Remove. - * src/vcg.h (node_t, edge_t, graph_t): Constify the char * members. - * src/files.c (open_files): Initialize graph_obstack. - * src/print_graph.c (print_actions): CPP out useless code. - (print_core): Don't output the last `\n' in labels. - Use `quote'. - * src/files.c (output_files): Output the VCG file. - * src/main.c (main): Invoke print_graph (); - -2001-08-06 Marc Autret <autret_m@epita.fr> - - Automaton VCG graph output. - Using option ``-g'' or long option ``--graph'', you can generate - a gram_filename.vcg file containing a VCG description of the LALR (1) - automaton of your grammar. - - * src/main.c: Call to print_graph() function. - * src/getargs.h: Update. - * src/getargs.c (options): Update to catch `-g' and `--graph' options. - (graph_flag): New flag. - (longopts): Update. - (getargs): Add case `g'. - * src/files.c (graph_obstack): New obstack struct. - (open_files): Initialize new obstack. - (output_files): Saves graph_obstack if required. - * src/files.h (graph_obstack): New extern declaration. - * src/Makefile.am: Add new source files. - -2001-08-06 Marc Autret <autret_m@epita.fr> - - * src/print_graph.c, src/print_graph.h (graph): New. - * src/vcg.h: New file. - * src/vcg.c: New file, VCG graph handling. - -2001-08-06 Marc Autret <autret_m@epita.fr> - - Add of %source_extension and %header_extension which specify - the source or/and the header output file extension. - - * src/files.c (compute_base_names): Remove initialisation of - src_extension and header_extension. - (compute_exts_from_gf): Update. - (compute_exts_from_src): Update. - (output_files): Update. - * src/reader.c (parse_header_extension_decl): New. - (parse_source_extension_decl): New. - (read_declarations): New case statements for the new tokens. - * src/lex.c (percent_table): Add entries for %source_extension - and %header_extension. - * src/lex.h (token_e): New tokens tok_hdrext and tok_srcext. - -2001-08-06 Marc Autret <autret_m@epita.fr> - - * configure.in: Bump to 1.28c. - * doc/bison.texinfo: Texinfo thingies. - -2001-08-04 Pascal Bart <pascal.bart@epita.fr> - - * tests/atconfig.in (CPPFLAGS): Add. - * tests/calc.at (AT_CHECK): Use CPPFLAGS. - -2001-08-03 Akim Demaille <akim@epita.fr> - - Version 1.28b. - -2001-08-03 Akim Demaille <akim@epita.fr> - - * tests/Makefile.am (check-local): Ship testsuite. - * tests/calc.at (_AT_DATA_CALC_Y): Prototype all the functions. - Include `string.h'. - -2001-08-03 Akim Demaille <akim@epita.fr> - - * configure.in: Try using -Wformat when compiling. - -2001-08-03 Akim Demaille <akim@epita.fr> - - * configure.in: Bump to 1.28b. - -2001-08-03 Akim Demaille <akim@epita.fr> - - * src/complain.c: Adjust strerror_r portability issues. - -2001-08-03 Akim Demaille <akim@epita.fr> - - Version 1.28a. - -2001-08-03 Akim Demaille <akim@epita.fr> - - * src/getargs.c, src/getarg.h (skeleton)): Constify. - * src/lex.c (literalchar): Avoid name clashes on `buf'. - * src/getargs.c: Include complain.h. - * src/files.c, src/files.h (skeleton_find): Avoid name clashes. - * lib/quotearg.c, lib/quotearg.h: Update from fileutils 4.1. - -2001-08-03 Akim Demaille <akim@epita.fr> - - * src/reader.c (readgram): Display hidden chars in error messages. - -2001-08-03 Akim Demaille <akim@epita.fr> - - Update to gettext 0.10.39. - -2001-08-03 Akim Demaille <akim@epita.fr> - - * lib/strspn.c: New. - -2001-08-01 Marc Autret <autret_m@epita.fr> - - * doc/bison.texinfo: Update. - * doc/bison.1 (mandoc): Update. - * src/system.h (EXT_GUARD_C, EXT_STYPE_H): Remove .c and .h. - * src/files.c: Support output files extensions computing. - (src_extension): New static variable. - (header_extension): New static variable. - (tr): New function. - (get_extension_index): New function, gets the index of an extension - filename in a string. - (compute_exts_from_gf): New function, computes extensions from the - grammar file extension. - (compute_exts_from_src): New functions, computes extensions from the - C source file extension, file given by ``-o'' option. - (compute_base_names): Update. - (output_files): Update. - -2001-08-01 Robert Anisko <anisko_r@epita.fr> - - * doc/bison.texi: Document @$. - (Locations): New section. - -2001-07-18 Akim Demaille <akim@epita.fr> - - * Makefile.maint, GNUmakefile: New, from Autoconf 2.52. - * config/prev-version.txt, config/move-if-change: New. - * Makefile.am: Adjust. - -2001-07-08 Pascal Bart <pascal.bart@epita.fr> - - * src/bison.simple (yyparse): Suppress warning `comparaison - between signed and unsigned'. - -2001-07-05 Pascal Bart <pascal.bart@epita.fr> - - * src/getargs.h (raw_flag): Remove. - * src/getargs.c: Die on `-r'/`--raw'. - * src/lex.c (parse_percent_token): Die on `%raw'. - * src/reader.c (output_token_defines): Suppress call to `raw_flag'. - * tests/calc.at: Suppress test with option `--raw'. - -2001-07-14 Akim Demaille <akim@epita.fr> - - * config/: New. - * configure.in: Require Autoconf 2.50. - Update to gettext 0.10.38. - -2001-03-16 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo: ANSIfy the examples. - -2001-03-16 Akim Demaille <akim@epita.fr> - - * getargs.c (skeleton): New variable. - (longopts): --skeleton is a new option. - (shortopts, getargs): -S is a new option. - * getargs.h: Declare skeleton. - * output.c (output_parser): Use it. - -2001-03-16 Akim Demaille <akim@epita.fr> - - * m4/strerror_r.m4: New. - * m4/error.m4: Run AC_FUNC_STRERROR_R. - * lib/error.h, lib/error.c: Update. - -2001-03-16 Akim Demaille <akim@epita.fr> - - * src/getargs.c (longopts): Clean up. - -2001-02-21 Akim Demaille <akim@epita.fr> - - * src/reader.c (gensym): `gensym_count' is your own. - Use a static buf to create the symbol name, as token_buffer is no - longer a buffer. - -2001-02-08 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (conflict_report): Be sure not to append to res - between two calls, which could happen if both first sprintf were - skipped, but not the first cp += strlen. - -2001-02-08 Akim Demaille <akim@epita.fr> - - * lib/memchr.c, lib/stpcpy.c, lib/strndup.c, lib/strnlen.c: - New, from fileutils 4.0.37. - * configure.in: Require Autoconf 2.49c. I took some time before - making this decision. This is the only way out for portability - issues in Bison, it would mean way too much duplicate effort to - import in Bison features implemented in 2.49c since 2.13. - AC_REPLACE_FUNCS and AC_CHECK_DECLS the functions above. - -2001-02-02 Akim Demaille <akim@epita.fr> - - * lib/malloc.c, lib/realloc.c: New, from the fileutils 4.0.37. - * lib/xalloc.h, lib/xmalloc.c: Update. - -2001-01-19 Akim Demaille <akim@epita.fr> - - Get rid of the ad hoc handling of token_buffer in the scanner: use - the obstacks. - - * src/lex.c (token_obstack): New. - (init_lex): Initialize it. No longer call... - (grow_token_buffer): this. Remove it. - Adjust all the places which used it to use the obstack. - -2001-01-19 Akim Demaille <akim@epita.fr> - - * src/lex.h: Rename all the tokens: - s/\bENDFILE\b/tok_eof/g; - s/\bIDENTIFIER\b/tok_identifier/g; - etc. - Let them be enums, not #define, to ease debugging. - Adjust all the code. - -2001-01-18 Akim Demaille <akim@epita.fr> - - * src/lex.h (MAXTOKEN, maxtoken, grow_token_buffer): Remove, private. - * src/lex.c (maxtoken, grow_token_buffer): Static. - -2001-01-18 Akim Demaille <akim@epita.fr> - - Since we now use obstacks, more % directives can be enabled. - - * src/lex.c (percent_table): Also accept `%yacc', - `%fixed_output_files', `%defines', `%no_parser', `%verbose', and - `%debug'. - Handle the actions for `%semantic_parser' and `%pure_parser' here, - instead of returning a token. - * src/lex.h (SEMANTIC_PARSER, PURE_PARSER): Remove, unused. - * src/reader.c (read_declarations): Adjust. - * src/files.c (open_files): Don't call `compute_base_names', don't - compute `attrsfile' since they depend upon data which might be - *in* the input file now. - (output_files): Do it here. - * src/output.c (output_headers): Document the fact that this patch - introduces a guaranteed SEGV for semantic parsers. - * doc/bison.texinfo: Document them. - * tests/suite.at: Exercise these %options. - -2000-12-20 Akim Demaille <akim@epita.fr> - - Also handle the output file (--verbose) with obstacks. - - * files.c (foutput): Remove. - (output_obstack): New. - Adjust all dependencies. - * src/conflicts.c: Return a string. - * src/system.h (obstack_grow_string): Rename as... - (obstack_sgrow): this. Be ready to work with non literals. - (obstack_fgrow4): New. - -2000-12-20 Akim Demaille <akim@epita.fr> - - * src/files.c (open_files): Fix the computation of short_base_name - in the case of `-o foo.tab.c'. - -2000-12-20 Akim Demaille <akim@epita.fr> - - * src/reader.c (copy_string, copy_comment, copy_comment2, copy_at) - (copy_dollar): Now that everything uses obstacks, get rid of the - FILE * parameters. - -2000-12-20 Akim Demaille <akim@epita.fr> - - * src/files.c (open_files): Actually the `.output' file is based - on the short_base_name, not base_name. - * tests/suite.at (Checking output file names): Adjust. - -2000-12-20 Akim Demaille <akim@epita.fr> - - * src/bison.s1: Remove, we now use directly... - * src/bison.simple: this. - * src/Makefile.am: Use pkgdata instead of data. - -2000-12-20 Akim Demaille <akim@epita.fr> - - * src/files.c (guard_obstack): New. - (open_files): Initialize it. - (output_files): Dump it... - * src/files.h: Export it. - * src/reader.c (copy_guard): Use it. - -2000-12-19 Akim Demaille <akim@epita.fr> - - * src/files.c (outfile, defsfile, actfile): Removed as global - vars. - (open_files): Don't compute them. - (output_files): Adjust. - (base_name, short_base_name): Be global. - Adjust dependencies. - -2000-12-19 Akim Demaille <akim@epita.fr> - - * src/files.c (strsuffix): New. - (stringappend): Be just like strcat but allocate. - (base_names): Eve out from open_files. - Try to simplify the rather hairy computation of base_name and - short_base_name. - (open_files): Use it. - * tests/suite.at (Checking output file names): New test. - -2000-12-19 Akim Demaille <akim@epita.fr> - - * src/system.h (obstack_grow_literal_string): Rename as... - (obstack_grow_string): this. - * src/output.c (output_parser): Recognize `%% actions' instead of - `$'. - * src/bison.s1: s/$/%% actions/. - * src/bison.hairy: Likewise. - -2000-12-19 Akim Demaille <akim@epita.fr> - - * src/output.c (output_parser): Compute the `#line' lines when - there are. - * src/Makefile.am (bison.simple): Be a simple copy of bison.s1. - Suggested by Hans Aberg. - -2000-12-19 Akim Demaille <akim@epita.fr> - - Let the handling of the skeleton files be local to the procedures - that use it. - - * src/files.c (xfopen, xfclose, skeleton_find, guardfile): No - longer static. - (fparser, open_extra_files): Remove. - (open_files, output_files): Don't take care of fparser. - * src/files.h: Adjust. - * src/output.c (output_parser): Open and close the file to the - skeleton. - * src/reader.c (read_declarations): When %semantic_parser, open - fguard. - -2000-12-19 Akim Demaille <akim@epita.fr> - - * src/file.h (BISON_SIMPLE, BISON_HAIRY): Move from here... - * src/system.h (BISON_SIMPLE, BISON_HAIRY): ... to here. - -2000-12-19 Akim Demaille <akim@epita.fr> - - * src/files.c (open_files): Yipee! We no longer need all the code - looking for `/tmp' since we have no tmp file. - -2000-12-19 Akim Demaille <akim@epita.fr> - - * src/system.h (EXT_TAB, EXT_OUTPUT, EXT_STYPE_H, EXT_GUARD_C): - New macros. - * src/files.c (open_files): Less dependency on MSDOS etc. - -2000-12-14 Akim Demaille <akim@epita.fr> - - * src/bison.s1 (YYLLOC_DEFAULT): New macro. - Provide a default definition. - Use it when executing the default @ action. - * src/reader.c (reader_output_yylsp): No longer include - `timestamp' and `text' in the default YYLTYPE. - -2000-12-12 Akim Demaille <akim@epita.fr> - - * src/reader.c (copy_definition, parse_union_decl, copy_action) - (copy_guard): Quote the file names. - Reported by Laurent Mascherpa. - -2000-12-12 Akim Demaille <akim@epita.fr> - - * src/output.c (output_headers, output_program, output): Be sure - to escape special characters when outputting filenames. - (ACTSTR_PROLOGUE, ACTSTR_EPILOGUE): Remove. - (output_headers): Don't depend on them, Use ACTSTR. - -2000-11-17 Akim Demaille <akim@epita.fr> - - * lib/obstack.h: Formatting changes. - (obstack_grow, obstack_grow0): Don't cast WHERE at all: it - prevents type checking. - (obstack_ptr_grow, obstack_ptr_grow_fast): When assigning, don't - cast the value to (void *): assigning a `foo *' to a `void *' - variable is valid. - (obstack_int_grow, obstack_int_grow_fast): Don't cast AINT to int. - * src/reader.c (parse_union_decl): Typo: use obstack_1grow to - append characters. - -2000-11-17 Akim Demaille <akim@epita.fr> - - * tests/Makefile.am (suite.m4, regression.m4, calc.m4): Rename - as... - (suite.m4, regression.m4, calc.m4): these. - * tests/atgeneral.m4: Update from CVS Autoconf. - -2000-11-17 Akim Demaille <akim@epita.fr> - - * tests/regression.m4 (%union and --defines): New test, - demonstrating a current bug in the obstack implementation. - -2000-11-17 Akim Demaille <akim@epita.fr> - - * src/bison.s1 (_YY_DECL_VARIABLES, YY_DECL_VARIABLES): New - macros. - Use them to declare the variables which are global or local to - `yyparse'. - -2000-11-17 Akim Demaille <akim@epita.fr> - - * acconfig.h: Remove, no longer used. - -2000-11-07 Akim Demaille <akim@epita.fr> - - * src: s/Copyright (C)/Copyright/g. - -2000-11-07 Akim Demaille <akim@epita.fr> - - * src/reader.c (reader): #define YYLSP_NEEDED to 1 instead of just - defining. - * src/bison.s1: s/#ifdef YYLSP_NEEDED/#if YYLSP_NEEDED/. - -2000-11-07 Akim Demaille <akim@epita.fr> - - * src/bison.s1 (YYLEX): Use #if instead of #ifdef. - Merge in a single CPP if/else. - -2000-11-07 Akim Demaille <akim@epita.fr> - - * src/output.c (output): Remove useless variables. - * lib/obstack.c (obstack_grow, obstack_grow0): Rename the second - argument `data' for consistency with the prototypes. - Qualify it `const'. - (obstack_copy, obstack_copy0): Rename the second argument as - `address' for consistency. Qualify it `const'. - * lib/obstack.h (obstack_copy, obstack_copy0, obstack_grow) - (obstack_grow0, obstack_ptr_grow, obstack_ptr_grow_fast): Qualify - `const' their input argument (`data' or `address'). - Adjust the corresponding macros to include `const' in casts. - -2000-11-03 Akim Demaille <akim@epita.fr> - - * src/Makefile.am (INCLUDES): s/PFILE/BISON_SIMPLE/. - s/PFILE1/BISON_HAIRY/. - Adjust dependencies. - -2000-11-03 Akim Demaille <akim@epita.fr> - - For some reason, this was not applied. - - * src/files.c [VMS]: No longer include `ssdef.h', no longer define - `unlink': it's no longer used. - -2000-11-03 Akim Demaille <akim@epita.fr> - - * src/files.c (skeleton_find): New function, eved out of... - (open_files, open_extra_files): here. - -2000-11-03 Akim Demaille <akim@epita.fr> - - Don't use `atexit'. - - * src/files.c (obstack_save): New function. - (done): Rename as... - (output_files): this. - Use `obstack_save'. - * src/main.c (main): Don't use `atexit' to register `done', since - it no longer has to remove tmp files, just call `output_files' - when there are no errors. - -2000-11-02 Akim Demaille <akim@epita.fr> - - * src/files.c [VMS]: No longer include `ssdef.h', no longer define - `unlink': it's no longer used. - * src/files.h: Formatting changes. - -2000-11-02 Akim Demaille <akim@epita.fr> - - Remove the last uses of mktemp and unlink/delete. - - * src/files.c (fdefines, ftable): Removed. - (defines_ostack, table_obstack): New. - Adjust dependencies of the former into uses of the latter. - * src/output.c (output_short_or_char_table, output_short_table): - Convert to using obstacks. - * src/reader.c (copy_comment2): Accept one FILE * and two - obstacks. - (output_token_defines, reader_output_yylsp): Use obstacks. - * src/system.h (obstack_fgrow3): New. - * po/POTFILES.in: Adjust. - -2000-11-01 Akim Demaille <akim@epita.fr> - - Change each use of `fattrs' into a use of `attrs_obstack'. - - * src/reader.c (copy_at): Typo: s/yylloc/yyloc/. - * src/files.c (fattrs): Remove. - (attrs_obstack): New. - Adjust all dependencies. - (done): If SEMANTIC_PARSER, dump attrs_obstack into attrsfile. - -2000-11-01 Akim Demaille <akim@epita.fr> - - Introduce obstacks. - Change each use of `faction' into a use of `action_obstack'. - - * lib/obstack.h, lib/obstack.c: New files. - * src/files.c (faction): Remove. - (action_obstack): New. - Adjust all dependencies. - -2000-10-20 Akim Demaille <akim@epita.fr> - - * lib/quote.h (PARAMS): New macro. Use it. - -2000-10-16 Akim Demaille <akim@epita.fr> - - * src/output.c (output_short_or_char_table): New function. - (output_short_table, output_token_translations): Use it. - (goto_actions): Use output_short_table. - -2000-10-16 Akim Demaille <akim@epita.fr> - - * src/symtab.c (bucket_new): New function. - (getsym): Use it. - - * src/output.c (output_short_table): New argument to display the - comment associated with the table. - Adjust dependencies. - (output_gram): Use it. - (output_rule_data): Nicer output layout for YYTNAME. - -2000-10-16 Akim Demaille <akim@epita.fr> - - * src/lex.c (read_typename): New function. - (lex): Use it. - * src/reader.c (copy_dollar): Likewise. - -2000-10-16 Akim Demaille <akim@epita.fr> - - * src/reader.c (copy_comment2): Expect the input stream to be on - the `/' which is suspected to open a comment, instead of being - called after `//' or `/*' was read. - (copy_comment, copy_definition, parse_union_decl, copy_action) - (copy_guard): Adjust. - -2000-10-16 Akim Demaille <akim@epita.fr> - - * src/reader.c (parse_expect_decl): Use `skip_white_space' and - `read_signed_integer'. - -2000-10-16 Akim Demaille <akim@epita.fr> - - * src/reader.c (copy_dollar): New function. - (copy_guard, copy_action): Use it. - -2000-10-16 Akim Demaille <akim@epita.fr> - - * lib/quote.h, lib/quote.c, lib/quotearg.h, lib/quotearg.c: - * m4/prereq.m4, m4/c-bs-a.m4, m4/mbstate.m4: - New files, from Fileutils 4.0.27. - * src/main.c (printable_version): Remove. - * src/lex.c, src/reader.c: Use `quote'. - -2000-10-04 Akim Demaille <akim@epita.fr> - - * lib/error.c, lib/error.h: New files, needed by xmalloc.c. - -2000-10-04 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo: Various typos spotted by Neil Booth. - -2000-10-04 Akim Demaille <akim@epita.fr> - - When a literal string is used to define two different tokens, - `bison -v' segfaults. - Reported by Piotr Gackiewicz, and fixed by Neil Booth. - - * tests/regression.m4: New file. - Include the core of the sample provided by Piotr Gackiewicz. - * src/reader.c (parse_token_decl): Diagnose bad cases, and proceed - properly. - -2000-10-04 Akim Demaille <akim@epita.fr> - - * src/reader.c (parse_expect_decl): Keep `count' within the size - of `buffer'. - From Neil Booth. - -2000-10-02 Paul Eggert <eggert@twinsun.com> - - * bison.s1 (yyparse): Assign the default value - unconditionally, to avoid a GCC warning and make the parser a - tad smaller. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/getargs.c (getargs): Don't dump `--help' on unrecognized - options. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/derives.c, src/print.c, src/reduce.c: To ease the - translation, move some `\n' out of the translated strings. - -2000-10-02 Akim Demaille <akim@epita.fr> - - The location tracking mechanism is precious for parse error - messages. Nevertheless, it is enabled only when `@n' is used in - the grammar, which is a different issue (you can use it in error - message, but not in the grammar per se). Therefore, there should - be another means to enable it. - - * src/getargs.c (getargs): Support `--locations'. - (usage): Report it. - * src/getargs.h (locationsflag): Export it. - * src/lex.c (percent_table): Support `%locations'. - * src/reader.c (yylsp_needed): Remove this variable, now replaced - with `locationsflag'. - * doc/bison.texinfo: Document `--locations' and `%locations'. - Sort the options. - * tests/calc.m4: Test it. - - For regularity of the names, replace each - (nolineflag, toknumflag, rawtokenumflag, noparserflag): with... - (no_lineflag, token_tableflag, rawflag, no_parserflag): this. - In addition replace each `flag' with `_flag'. - -2000-10-02 Akim Demaille <akim@epita.fr> - - Also test parse error messages, including with YYERROR_VERBOSE. - - * tests/calc.m4 (calc.y): Add support for `exp = exp' (non - associative). - Use it to check the computations. - Use it to check `nonassoc' is honored. - (AT_DATA_CALC_Y): Equip `calc.y' with YYERROR_VERBOSE when passed - `--yyerror-verbose'. - (_AT_CHECK_CALC): Adjust to this option. - (_AT_CHECK_CALC_ERROR): New macro to check parse error messages. - -2000-10-02 Akim Demaille <akim@epita.fr> - - Test also `--verbose', `--defines' and `--name-prefix'. Testing - the latter demonstrates a flaw in the handling of non debugging - parsers introduced by myself on 2000-03-16: `#define yydebug 0' - was used in order to simplify: - - #if YYDEBUG - if (yydebug) - { - ... - } - #endif - - into - - if (yydebug) - { - ... - } - - unfortunately this leads to a CPP conflict when - `--name-prefix=foo' is used since it produces `#define yydebug - foodebug'. - - * src/bison.s1 [!YYDEBUG]: Do not define yydebug. - (YYDPRINTF): New macro. - Spread its use. - * tests/calc.m4 (AT_CHECK_CALC): Do require a title, build it from - the bison options. - Also test `--verbose', `--defines' and `--name-prefix'. - -2000-10-02 Akim Demaille <akim@epita.fr> - - Improve the readability of the produced parsers. - - * src/bison.s1: Formatting changes. - Improve the comment related to the `$' mark. - (yydefault): Don't fall through to `yyresume': `goto' there. - * src/output.c (output_parser): When the `$' is met, skip the end - of its line. - New variable, `number_of_dollar_signs', to check there's exactly - one `$' in the parser skeleton. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * lib/xstrdup.c: New file, from the fileutils. - * src/reader.c (parse_token_decl, get_type_name, parse_type_decl) - (parse_assoc_decl, parse_thong_decl, get_type): Use `xstrdup' - instead of strlen + xmalloc + strcpy. - * src/symtab.c (copys): Remove, use xstrdup instead. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/gram.h (associativity): New enum type which replaces the - former CPP macros `RIGHT_ASSOC', `LEFT_ASSOC' and `NON_ASSOC' with - `right_assoc', `left_assoc' and `non_assoc'. - Adjust all dependencies. - * src/reader.c: Formatting changes. - (LTYPESTR): Don't define it, use it as a literal in - `reader_output_yylsp'. - * src/symtab.h (symbol_class): New enum type which replaces the - former CPP macros `SUNKNOWN', `STOKEN and `SNTERM' with - `sunknown', `stoken and `snterm'. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/getargs.c (fixed_outfiles): Rename as... - (yaccflag): for consistency and accuracy. - Adjust dependencies. - -2000-10-02 Akim Demaille <akim@epita.fr> - - Use the more standard files `xalloc.h' and `xmalloc.c' instead of - Bison's `allocate.c' and `alloc.h'. This patch was surprisingly - difficult and introduced a lot of core dump. It turns out that - Bison used an implementation of `xmalloc' based on `calloc', and - at various places it does depend upon the initialization to 0. I - have not tried to isolate the pertinent places, and all the former - calls to Bison's `xmalloc' are now using `XCALLOC'. Someday, - someone should address this issue. - - * src/allocate.c, src/alloc.h, m4/bison-decl.m4: Remove. - * lib/xmalloc.c, lib/xalloc.h, m4/malloc.m4, m4/realloc.m4: New - files. - Adjust dependencies. - * src/warshall.h: New file. - Propagate. - -2000-10-02 Akim Demaille <akim@epita.fr> - - Various anti-`extern in *.c' changes. - - * src/system.h: Include `assert.h'. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/state.h (nstates, final_state, first_state, first_shift) - (first_reduction): Move their exportation from here... - * src/LR0.h: to here. - Adjust dependencies. - * src/getargs.c (statisticsflag): New variable. - Add support for `--statistics'. - Adjust dependencies. - - Remove a lot of now useless `extern' statements in most files. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/LR0.h: New file. - Propagate its use. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/print.h: New file. - Propagate its use. - * src/print.c: Formatting and ordering changes. - (verbose, terse): Replace with... - (print_results): this new function. - Adjust dependencies. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/conflicts.c (conflict_report): New function. - (conflict_log, verbose_conflict_log): Replace with... - (print_conflicts): this function. - Adjust dependencies. - * src/conflicts.h: New file. - Propagate its inclusion. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/nullable.h: New file. - Propagate its inclusion. - * src/nullable.c: Formatting changes. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/reduce.h: New file. - Propagate its inclusion. - * src/reduce.c: Topological sort and other formatting changes. - (bool, TRUE, FALSE): Move their definition to... - * src/system.h: here. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/files.c: Formatting changes. - (tryopen, tryclose, openfiles): Rename as... - (xfopen, xfclose, open_files): this. - (stringappend): static. - * src/files.h: Complete the list of exported symbols. - Propagate its use. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/reader.h: New file. - Propagate its use instead of tedious list of `extern' and - prototypes. - * src/reader.c: Formatting changes, topological sort, - s/register//. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/lex.h: Prototype `lex.c' exported functions. - * src/reader.c: Adjust. - * src/lex.c: Formatting changes. - (safegetc): Rename as... - (xgetc): this. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/lalr.h: New file. - Propagate its inclusion instead of prototypes and `extern'. - * src/lalr.c: Formatting changes, topological sorting etc. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/output.c (token_actions): Introduce a temporary array, - YYDEFACT, that makes it possible for this function to use - output_short_table. - -2000-10-02 Akim Demaille <akim@epita.fr> - - `user_toknums' is output as a `short[]' in `output.c', while it is - defined as a `int[]' in `reader.c'. For consistency with the - other output tables, `user_toknums' is now defined as a table of - shorts. - - * src/reader.c (user_toknums): Be a short table instead of an int - table. - Adjust dependencies. - - Factor the short table outputs. - - * src/output.c (output_short_table): New function. - * src/output.c (output_gram, output_stos, output_rule_data) - (output_base, output_table, output_check): Use it. - -2000-10-02 Akim Demaille <akim@epita.fr> - - * src/output.c (output): Topological sort of the functions, in - order to get rid of the `static' prototypes. - No longer use `register'. - * src/output.h: New file. - Propagate its inclusion in files explicitly prototyping functions - from output.c. - -2000-09-21 Akim Demaille <akim@epita.fr> - - * src/atgeneral.m4: Update from Autoconf. - -2000-09-21 Akim Demaille <akim@epita.fr> - - * src/closure.h: New file. - * src/closure.c: Formatting changes, topological sort over the - functions, use of closure.h. - (initialize_closure, finalize_closure): Rename as... - (new_closure, free_closure): these. Adjust dependencies. - * src/LR0.c: Formatting changes, topological sort, use of - cloture.h. - (initialize_states): Rename as... - (new_states): this. - * src/Makefile.am (noinst_HEADERS): Adjust. - -2000-09-20 Akim Demaille <akim@epita.fr> - - * src/acconfig.h: Don't protect config.h against multiple - inclusion. - Don't define PARAMS. - * src/system.h: Define PARAMS. - Remove some of the ad-hoc CPP magic for DOS, VMS etc.: this is the - purpose of config.h. system.h must not try to fix wrong - definitions in config.h. - -2000-09-20 Akim Demaille <akim@epita.fr> - - * src/derives.h: New file. - * src/main.c, src/derives.h: Use it. - Formatting changes. - * src/Makefile.am (noinst_HEADERS): Adjust. - -2000-09-20 Akim Demaille <akim@epita.fr> - - * tests/atgeneral.m4: Update from Autoconf. - * tests/calc.m4 (_AT_DATA_CALC_Y, AT_DATA_CALC_Y, _AT_CHECK_CALC) - (AT_CHECK_CALC): New macros. - Use these macros to test bison with options `', `--raw', - `--debug', `--yacc', `--yacc --debug'. - -2000-09-19 Akim Demaille <akim@epita.fr> - - * src/output.c: Formatting changes. - * src/machine.h: Remove, leaving its contents in... - * src/system.h: here. - Include stdio.h. - Adjust all dependencies on stdio.h and machine.h. - * src/getargs.h: New file. - Let all `extern' declarations about getargs.c be replaced with - inclusion of `getargs.h'. - * src/Makefile.am (noinst_HEADERS): Adjust. - - * tests/calc.m4 (yyin): Be initialized in main, not on the global - scope. - (yyerror): Returns void, not int. - * doc/bison.texinfo: Formatting changes. - -2000-09-19 Akim Demaille <akim@epita.fr> - - * tests/calc.m4 (calc.y): Do not assign to stdin, as it's not - portable. - -2000-09-18 Akim Demaille <akim@epita.fr> - - * configure.in: Append WARNING_CFLAGS to CFLAGS. - * src/Makefile.am (INCLUDES): Don't. - Be ready to fetch headers in lib/. - -2000-09-18 Akim Demaille <akim@epita.fr> - - * doc/bison.texinfo: Update the copyright. - ANSIfy and GNUify the examples. - Remove the old menu. - -2000-09-18 Akim Demaille <akim@epita.fr> - - First set of tests: use the `calc' example from the documentation. - - * src/bison.s1 (yyparse): Condition the code using `yytname' which - is defined only when YYDEBUG is. - * m4/atconfig.m4 (AT_CONFIG): Adjust to Autoconf 2.13. - * src/files.c (tryopen, tryclose): Formatting changes. - Move to the top and be static. - * src/reader.c (read_signed_integer): Likewise. - * tests/calc.m4: New file. - * Makefile.am, suite.m4: Adjust. - * m4/atconfig.m4: Set BISON_SIMPLE and BISON_HAIRY. - -2000-09-18 Akim Demaille <akim@epita.fr> - - Add support for an Autotest test suite for Bison. - - * m4/m4.m4, m4/atconfig.m4: New files. - * m4/Makefile.am (EXTRA_DIST): Adjust. - * tests/suite.m4, tests/Makefile.am, tests/atgeneral.m4: New - files. - * src/getargs.c: Display a more standard --version message. - * src/reader.c (reader): Formatting changes. - No longer depend upon VERSION_STRING. - * configure.in: No longer use `dnl'. - Set up the test suite and the new directory `tests/. - (VERSION_STRING): Remove. - -2000-04-14 Akim Demaille <akim@epita.fr> - - * src/reader.c (copy_comment2): New function, same as former - `copy_comment', but outputs into two FILE *. - (copy_comment): Use it. - (parse_union_decl): Use it. - (get_type, parse_start_decl): Use the same `invalid' message. - (parse_start_decl, parse_union_decl): Use the same `multiple' - message. - (parse_union_decl, copy_guard, copy_action): Use the same - `unmatched' message. - * m4/Makefile.am (EXTRA_DIST): Add `warning.m4'. - -2000-03-31 Akim Demaille <akim@epita.fr> - - * src/files.c (tryopen, tryclose): Move to the top. - Be static. - -2000-03-31 Akim Demaille <akim@epita.fr> - - * src/main.c (main): Don't call `done', exit does it. - -2000-03-31 Akim Demaille <akim@epita.fr> - - * allocate.c: s/return (foo)/return foo/. - * lalr.c: Likewise. - * LR0.c: Likewise. - * output.c: Likewise. - * reader.c: Likewise. - * symtab.c: Likewise. - * vmsgetargs.c: Likewise. - -2000-03-31 Akim Demaille <akim@epita.fr> - - Clean up the error reporting functions. - - * src/report.c: New file. - * src/report.h: Likewise. - * src/Makefile.am: Adjust. - * m4/error.m4: New file. - * m4/Makefile.am: Adjust. - * configure.in (jm_PREREQ_ERROR): Call it. - * src/main.c (int_to_string, banner, fatal_banner, warn_banner): - Remove. - (fatal, fatals): Remove. All callers use complain.c::fatal. - (warn, warni, warns, warnss, warnss): Remove. All callers use - complain.c::complain. - (toomany): Remove, use fatal instead. - * src/files.c (done): No argument, use complain_message_count. - * src/main.c (main): Register `done' to `atexit'. - - * src/getargs.c (usage): More `fputs', less `fprintf'. - -2000-03-28 Akim Demaille <akim@epita.fr> - - * lib/: New directory. - * Makefile.am (SUBDIRS): Adjust. - * configure.in: Adjust. - (LIBOBJS): Although not used yet, AC_SUBST it, otherwise it's - useless. - * src/alloca.c: Moved to lib/. - * src/getopt.c: Likewise. - * src/getopt1.c: Likewise. - * src/getopt.h: Likewise. - * src/ansi2knr.c: Likewise. - * src/ansi2knr.1: Likewise. - * src/Makefile.am: Adjust. - * lib/Makefile.am: New file. - -2000-03-28 Akim Demaille <akim@epita.fr> - - * src/getargs.c (usage): Refresh the help message. - -2000-03-17 Akim Demaille <akim@epita.fr> - - * src/getopt1.c: Updated from textutils 2.0e - * src/getopt.c: Likewise. - * src/getopt.h: Likewise. - -2000-03-17 Akim Demaille <akim@epita.fr> - - * src/Makefile.am (bison.simple): Fix the awk program: quote only - the file name, not the whole `#line LINE FILE'. - -2000-03-17 Akim Demaille <akim@epita.fr> - - On syntax errors, report the token on which we choked. - - * src/bison.s1 (yyparse): In the label yyerrlab, when - YYERROR_VERBOSE, add yychar in msg. - -2000-03-17 Akim Demaille <akim@epita.fr> - - * src/reader.c (copy_at): New function. - (copy_guard): Use it. - (copy_action): Use it. - -2000-03-17 Akim Demaille <akim@epita.fr> - - Be kind to translators, save some useless translations. - - * src/main.c (banner): New function. - (fatal_banner): Use it. - (warn_banner): Use it. - -2000-03-17 Akim Demaille <akim@epita.fr> - - * src/reader.c (copy_definition): Use copy_string and - copy_comment. Removed now unused `match', `ended', - `cplus_comment'. - (copy_comment, copy_string): Moved, to be visible from - copy_definition. - -2000-03-17 Akim Demaille <akim@epita.fr> - - * src/reader.c (copy_string): Declare `static inline'. No - problems with inline, since it is checked by configure. - (copy_comment): Likewise. - -2000-03-17 Akim Demaille <akim@epita.fr> - - * src/reader.c (packsymbols): Formatting changes. - -2000-03-17 Akim Demaille <akim@epita.fr> - - * src/reader.c (copy_comment): New function, factored out from: - (copy_action): Use it. Removed now unused `match', `ended', - `cplus_comment'. - (copy_guard): Likewise. - -2000-03-17 Akim Demaille <akim@epita.fr> - - * src/reader.c (copy_string): New function, factored out from: - (copy_action): Use it. - (copy_guard): Likewise. - -2000-03-17 Akim Demaille <akim@epita.fr> - - Change the handling of @s so that they behave exactly like $s. - There is now a pseudo variable @$ (readble and writable), location - of the lhs of the rule (by default ranging from the location of - the first symbol of the rhs, to the location of the last symbol, - or, if the rhs is empty, YYLLOC). - - * src/bison.s1 [YYLSP_NEEDED] (yyloc): New variable, twin of - yyval. - (yyparse): When providing a default semantic action, provide a - default location action. - (after the $): No longer change `*YYLSP', just stack YYLOC the - same way you stack YYVAL. - * src/reader.c (read_declarations): Use warns. - (copy_guard, case '@'): Also recognize `@$', expanded as `YYLOC'. - (copy_action, case '@'): Likewise. - Use a standard error message, to save useless work from - translators. - -2000-03-17 Akim Demaille <akim@epita.fr> - - * src/bison.s1: Formatting and cosmetics changes. - * src/reader.c: Likewise. - Update the Copyright notice. - -2000-03-17 Akim Demaille <akim@epita.fr> - - * src/bison.s1 (#line): All set to `#line' only, since the - Makefile now handles them. - -2000-03-16 Akim Demaille <akim@epita.fr> - - * src/output.c (output_rule_data): Output the documentation of - some of the tables. - (Copyright notice): Update. - Formatting changes. - -2000-03-16 Akim Demaille <akim@epita.fr> - - * src/bison.s1 [!YYDEBUG]: Define yydebug to 0. This allows to - remove most `#if YYDEBUG != 0', since `if (yydebug)' is enough. - One `#if YYDEBUG' remains, since it uses variables which are - defined only if `YYDEBUG != 0'. - -2000-03-16 Akim Demaille <akim@epita.fr> - - * src/bison.s1 (yyparse): Reorganize the definitions of the stacks - and related variables so that the similarities are highlighted. - -2000-03-16 Akim Demaille <akim@epita.fr> - - * src/bison.s1: Properly indent CPP directives. - -2000-03-16 Akim Demaille <akim@epita.fr> - - * src/bison.s1: Properly indent the `alloca' CPP section. - -2000-03-16 Akim Demaille <akim@epita.fr> - - Do not hard code values of directories in `configure.in'. - Update the `configure' tool chain. - - * configure.in (XPFILE, XPFILE1, LOCALEDIR): Remove, handled by - src/makefile.am. - (VERSION_STRING): Use the third arg of AC_DEFINE_UNQUOTED. - (AC_OUTPUT): Add m4/Makefile. - Bump to bison 1.28a, 1.29 has never been released. - * acconfig.h (XPFILE, XPFILE1, LOCALEDIR): Remove, since they are - handled via src/Makefile.am. - (VERSION_STRING, PROTOTYPES, ENABLE_NLS, HAVE_CATGETS, - HAVE_GETTEXT, HAVE_LC_MESSAGES, HAVE_STPCPY): Remove, handled by - autoheader. - * Makefile.am (SUBDIRS): Add m4. - (ACLOCAL_AM_FLAGS): New variable. - (AUTOMAKE_OPTIONS): Add check-news. - * src/Makefile.am (bison.simple): Use awk to replace #line lines with - the proper line number and file name. - (DEFS): Propagate the location of bison library files and of the - locale files. - (INCLUDES): Added `-I ..' so that one can compile with srcdir != - builddir. - * acinclude.m4: Remove, replaced by the directory m4. - * m4/Makefile.am (EXTRA_DIST): New variable. - * m4/gettext.m4: New file, from the fileutils. - * m4/lcmessage.m4: Likewise - * m4/progtest.m4: Likewise. - * m4/bison-decl.m4: New file, extracted from former acinclude.m4. - -2000-03-10 Akim Demaille <akim@epita.fr> - - * src/closure.c: - Formatting changes of various comments. - Respect the GNU coding standards at various places. - Don't use `_()' when no translation is needed. - -1999-12-13 Jesse Thilo <jthilo@gnu.org> - - * src/files.c: - OS/2 honors TMPDIR environment variable. - -1999-12-13 Jesse Thilo <jthilo@gnu.org> - - * doc/bison.texinfo: Tweaked spelling and grammar. - Updated ISBN. - Removed reference to price of printed copy. - Mention BISON_SIMPLE and BISON_HAIRY. - -1999-12-13 Jesse Thilo <jthilo@gnu.org> - - * configure.in, NEWS: - Bison 1.29 released. - -1999-10-27 Jesse Thilo <jthilo@gnu.org> - - * doc/.cvsignore, doc/Makefile.am, doc/refcard.tex: - Added reference card. - -1999-07-26 Jesse Thilo <jthilo@gnu.org> - - * po/ru.po: Added Russian translation. - -1999-07-26 Jesse Thilo <jthilo@gnu.org> - - * configure.in: Added Russian translation. - -1999-07-06 Jesse Thilo <jthilo@gnu.org> - - * configure.in, NEWS, README: - Released version 1.28. - -1999-06-14 Jesse Thilo <jthilo@gnu.org> - - * src/system.h: - Squashed redefinition warning on some systems. - - * src/getargs.c, src/Makefile.am, src/reader.c, src/version.c: - Have configure build version string instead of relying on ANSI string - concatentation. - -1999-06-14 Jesse Thilo <jthilo@gnu.org> - - * po/POTFILES.in: Got rid of version.c. - -1999-06-14 Jesse Thilo <jthilo@gnu.org> - - * acconfig.h, configure.in: - Have configure build version string instead of relying on ANSI string - concatentation. - -1999-06-08 Jesse Thilo <jthilo@gnu.org> - - * doc/bison.1: - Dropped mention of `+' for long-named options. - -1999-05-30 Jesse Thilo <jthilo@gnu.org> - - * src/files.c: Added <unistd.h> for unlink(). - - * src/Makefile.am, src/system.h: - I18n fixes. - -1999-05-30 Jesse Thilo <jthilo@gnu.org> - - * README: Added a FAQ list. - - * configure.in, acconfig.h: - I18n fixes. - -1999-05-30 Jesse Thilo <jthilo@gnu.org> - - * doc/FAQ, doc/Makefile.am: - Added a FAQ list. - -1999-05-19 Jesse Thilo <jthilo@gnu.org> - - * src/alloc.h, src/symtab.h, src/version.c: - Protected inclusion of "config.h" with HAVE_CONFIG_H. - -1999-04-18 Jesse Thilo <jthilo@gnu.org> - - * src/.cvsignore, src/Makefile.am: - Reorganized: sources in `src', documentation in `doc'. - - * src/lex.c (literalchar): - fixed the code for escaping double quotes (thanks - Jonathan Czisny.) - -1999-04-18 Jesse Thilo <jthilo@gnu.org> - - * po/de.po, po/es.po, po/fr.po, po/nl.po, po/POTFILES.in: - Adjusted paths to reflect directory reorganization. - -1999-04-18 Jesse Thilo <jthilo@gnu.org> - - * doc/.cvsignore, doc/Makefile.am: - Reorganized: sources in `src', documentation in `doc'. - -1999-04-18 Jesse Thilo <jthilo@gnu.org> - - * configure.in: - Updated AC_INIT file to reflect directory reorganization. - - * configure.in, .cvsignore, Makefile.am, POTFILES.in: - Reorganized: sources in `src', documentation in `doc'. - -1999-04-13 Jesse Thilo <jthilo@gnu.org> - - * src/allocate.c: - Don't declare calloc() and realloc() if not necessary. - -1999-04-13 Jesse Thilo <jthilo@gnu.org> - - * configure.in, acconfig.h, acinclude.m4: - Don't declare calloc() and realloc() if not necessary. - -1999-03-23 Jesse Thilo <jthilo@gnu.org> - - * po/.cvsignore: Added i18n support. - -1999-03-23 Jesse Thilo <jthilo@gnu.org> - - * acconfig.h, configure.in, Makefile.am: - Added i18n support. - -1999-03-22 Jesse Thilo <jthilo@gnu.org> - - * src/bison.s1: Fixed #line numbers. - -1999-03-15 Jesse Thilo <jthilo@gnu.org> - - * po/es.po, po/fr.po, po/nl.po, po/de.po: - Added PO files from Translation Project. - -1999-03-03 Jesse Thilo <jthilo@gnu.org> - - * Makefile.am: - Added support for non-ANSI compilers (ansi2knr). - -1999-02-16 Jesse Thilo <jthilo@gnu.org> - - * configure.in: Bumped version number to 1.27. - - * Makefile.am: - Added `bison.simple' to list of files removed by `make distclean'. - -1999-02-12 Jesse Thilo <jthilo@gnu.org> - - * src/files.c, src/files.h: - Defined locations of parser files in config.h instead of Makefile. - -1999-02-12 Jesse Thilo <jthilo@gnu.org> - - * acconfig.h, acinclude.m4, configure.in, Makefile.am: - Defined locations of parser files in config.h instead of Makefile. - -1999-02-09 Jesse Thilo <jthilo@gnu.org> - - * Makefile.am: - Removed inappropriate use of $< macro. - -1999-02-05 Jesse Thilo <jthilo@gnu.org> - - * po/Makefile.in.in, po/POTFILES.in: - Add `po' directory skeleton. - -1999-01-27 Jesse Thilo <jthilo@gnu.org> - - * README: Document help-bison list. - - * configure.in: Add check for mkstemp(). - -1999-01-20 Jesse Thilo <jthilo@gnu.org> - - * src/conflicts.c, src/LR0.c, src/output.c, src/reader.c: - Hush a few compiler warnings. - - * src/files.c: - Add tryclose(), which verifies that fclose was successful. - Hush a couple of compiler warnings. - -1999-01-20 Jesse Thilo <jthilo@gnu.org> - - * Makefile.am, OChangeLog: - ChangeLog is now automatically generated. Include the old version as - OChangeLog. - -1999-01-14 Jesse Thilo <jthilo@gnu.org> - - * src/gram.h, src/lalr.c, src/lex.c, src/lex.h, src/machine.h, src/main.c, src/nullable.c, src/output.c, src/print.c, src/reader.c, src/reduce.c, src/state.h, src/symtab.c, src/symtab.h, src/types.h, src/vmsgetargs.c, src/warshall.c, src/allocate.c, src/alloc.h, src/bison.s1, src/closure.c, src/conflicts.c, src/derives.c, src/files.c, src/files.h, src/getargs.c, src/gram.c, src/LR0.c: - Update FSF address. - -1999-01-14 Jesse Thilo <jthilo@gnu.org> - - * doc/bison.texinfo: Fix formatting glitch. - - * doc/bison.texinfo: Update FSF address. - -1999-01-14 Jesse Thilo <jthilo@gnu.org> - - * acconfig.h: Update FSF address. - -1999-01-08 Jesse Thilo <jthilo@gnu.org> - - * src/system.h: - Don't define PACKAGE here, since config.h defines it. - -1998-12-30 Jesse Thilo <jthilo@gnu.org> - - * src/reader.c: Update copyright date. - - * src/main.c: - Ditch sprintf to statically-sized buffers in fatal/warn functions in - favor of output directly to stderr (avoids buffer overruns). - - * src/reader.c: Some checks for premature EOF. - - * src/allocate.c, src/alloc.h, src/closure.c, src/conflicts.c, src/derives.c, src/getargs.c, src/gram.c, src/lalr.c, src/lex.c, src/LR0.c, src/main.c, src/nullable.c, src/output.c, src/print.c, src/reduce.c, src/symtab.c, src/symtab.h, src/warshall.c: - Use prototypes if the compiler understands them. - - * src/files.c: Honor TMPDIR on Unix hosts. - Use prototypes if the compiler understands them. - - * src/reader.c: - Fix a couple of buffer overrun bugs. - Use prototypes if the compiler understands them. - - * src/system.h: Include unistd.h and ctype.h. - Use #ifdef instead of #if for NLS symbols. - -1998-12-30 Jesse Thilo <jthilo@gnu.org> - - * doc/bison.texinfo: - Delete comment "consider using @set for edition number, etc..." since - we now are doing so. - -1998-12-30 Jesse Thilo <jthilo@gnu.org> - - * configure.in: - Use prototypes if the compiler understands them. - - * NEWS: Document 1.26 highlights. - - * Makefile.am: Require Automake 1.3 or later. - - * acconfig.h: - Use prototypes if the compiler understands them. - -1998-12-29 Jesse Thilo <jthilo@gnu.org> - - * src/version.c: - Use VERSION symbol from automake for version number. - -1998-12-29 Jesse Thilo <jthilo@gnu.org> - - * acconfig.h, configure.in, version.cin: - Use VERSION symbol from automake for version number. - -1998-11-28 Jesse Thilo <jthilo@gnu.org> - - * Makefile.am: - Distribute original version of simple parser (bison.s1), not built - version (bison.simple). - -1998-11-28 Jesse Thilo <jthilo@gnu.org> - - * doc/bison.texinfo: Add info dir entry. - - * doc/bison.texinfo: - Let automake put version number into documentation. - -1998-11-26 Jesse Thilo <jthilo@gnu.org> - - * src/bison.cld, src/build.com, src/vmshlp.mar: - Add non-RCS files from /gd/gnu/bison. - -1998-11-26 Jesse Thilo <jthilo@gnu.org> - - * doc/bison.1: - Document the BISON_HAIRY and BISON_SIMPLE variables. - -1998-11-25 Jesse Thilo <jthilo@gnu.org> - - * src/version.c: Build version.c automatically. - - * src/reader.c: - Fix token numbering (used to start at 258, not 257). - - * src/system.h: Include config.h. - - * src/getargs.c: Update bug report address. - - * src/alloca.c, src/getopt1.c, src/getopt.c, src/getopt.h: - Get latest copies of alloca.c, getopt.c, getopt.h, getopt1.c from gnu.org. - -1998-11-25 Jesse Thilo <jthilo@gnu.org> - - * Makefile.am: - Rename bison.simple to bison.s1 (bison.simple is then built from bison.s1). - - * configure.in, version.cin: - Build version.c automatically. - - * AUTHORS: Add AUTHORS file. - - * README: Update bug report address. - - * bison.simple: - Rename bison.simple to bison.s1 (bison.simple is then built from bison.s1). - - * configure.in, Makefile.am, Makefile.in, stamp-h.in: - Add automake stuff. - -1998-11-25 Jesse Thilo <jthilo@gnu.org> - - * doc/bison.texinfo: Clean up some formatting. - -1998-05-05 Richard Stallman <rms@gnu.org> - - * doc/bison.texinfo: - Explain better why to make a pure parser. - -1998-01-05 Richard Stallman <rms@gnu.org> - - * src/files.c (openfiles): - [_WIN32 && !__CYGWIN32__] Use TEMP or Temp to - find a temporary directory, if possible. Do not unlink files while - they are open. - -1997-08-25 Richard Stallman <rms@gnu.org> - - * src/reader.c (stack_offset;): - Change some warni to warns. - - * src/lex.c (literalchar): Use warns, not warni. - -1997-06-28 Richard Stallman <rms@gnu.org> - - * src/bison.s1: Add a Bison version comment. - - * src/main.c (fatal, warn, berror): - Use program_name. - -1997-06-28 Richard Stallman <rms@gnu.org> - - * Makefile.in (bison_version): New variable. - (dist): Use that variable. - (bison.s1): Substitute the Bison version into bison.simple. - - * bison.simple: Add a Bison version comment. - -1997-06-18 Richard Stallman <rms@gnu.org> - - * src/main.c (fatal, warn, berror): - Make error messages standard. - (toomany): Improve error message text. - - * src/LR0.c, src/closure.c, src/conflicts.c, src/derives.c, src/files.c, src/lalr.c, src/lex.c, src/nullable.c, src/output.c, src/print.c, src/reader.c, src/reduce.c, src/symtab.c: - new.h renamed to alloc.h. - -1997-06-18 Richard Stallman <rms@gnu.org> - - * Makefile.in: new.h renamed to alloc.h. - -1997-05-24 Richard Stallman <rms@gnu.org> - - * src/lex.c (literalchar): - Fix the code for escaping \, " and '. - - (lex): Avoid trouble when there are many chars - to discard in a char literal with just several chars in it. - -1997-05-17 Richard Stallman <rms@gnu.org> - - * src/bison.s1: - Use malloc, if using alloca is troublesome. - (YYSTACK_USE_ALLOCA): New flag macro. - Define it for some systems and compilers. - (YYSTACK_ALLOC): New macro. - (yyparse): Use YYSTACK_ALLOC to allocate stack. - If it was malloc'd, free it. - -1997-05-17 Richard Stallman <rms@gnu.org> - - * bison.simple: - Use malloc, if using alloca is troublesome. - (YYSTACK_USE_ALLOCA): New flag macro. - Define it for some systems and compilers. - (YYSTACK_ALLOC): New macro. - (yyparse): Use YYSTACK_ALLOC to allocate stack. - If it was malloc'd, free it. - -1997-04-23 Richard Stallman <rms@gnu.org> - - * src/bison.s1: - (alloca) [__hpux]: Always define as __builtin_alloca. - -1997-04-23 Richard Stallman <rms@gnu.org> - - * bison.simple: - (alloca) [__hpux]: Always define as __builtin_alloca. - -1997-04-22 Richard Stallman <rms@gnu.org> - - * src/bison.s1: - [__hpux]: Include alloca.h (right for HPUX 10) - instead of declaring alloca (right for HPUX 9). - - * src/bison.s1 (__yy_memcpy): - Declare arg `count' as unsigned int. - (yyparse): Cast third arg to __yy_memcpy to unsigned int. - -1997-04-22 Richard Stallman <rms@gnu.org> - - * bison.simple: - [__hpux]: Include alloca.h (right for HPUX 10) - instead of declaring alloca (right for HPUX 9). - - * bison.simple (__yy_memcpy): - Declare arg `count' as unsigned int. - (yyparse): Cast third arg to __yy_memcpy to unsigned int. - -1997-01-03 Richard Stallman <rms@gnu.org> - - * src/allocate.c: [__STDC__ or _MSC_VER]: - Declare calloc and realloc to return void *. - -1997-01-02 Richard Stallman <rms@gnu.org> - - * src/system.h: - [_MSC_VER]: Include stdlib.h and process.h. - [_MSC_VER] (getpid): Define as macro--translate it to _getpid. - - * src/main.c (main): Return FAILURE as a value. - (printable_version): Declare arg as int, not char. - -1997-01-02 Richard Stallman <rms@gnu.org> - - * Makefile.in (dist): - Explicitly check for symlinks, and copy them. - -1996-12-19 Richard Stallman <rms@gnu.org> - - * src/files.c: - [_MSC_VER] (XPFILE, XPFILE1): Define, if not already defined. - -1996-12-18 Paul Eggert <eggert@gnu.org> - - * src/bison.s1 (yyparse): - If __GNUC__ and YYPARSE_PARAM are both defined, - declare yyparse to have a void * argument. - -1996-12-18 Paul Eggert <eggert@gnu.org> - - * bison.simple (yyparse): - If __GNUC__ and YYPARSE_PARAM are both defined, - declare yyparse to have a void * argument. - -1996-12-17 Richard Stallman <rms@gnu.org> - - * src/reduce.c (nbits): Add some casts. - -1996-08-12 Richard Stallman <rms@gnu.org> - - * src/bison.s1: Test _MSDOS as well as _MSDOS_. - -1996-08-12 Richard Stallman <rms@gnu.org> - - * bison.simple: Test _MSDOS as well as _MSDOS_. - -1996-07-31 Richard Stallman <rms@gnu.org> - - * src/bison.s1: - [__sun && __i386]: Include alloca.h. - -1996-07-31 Richard Stallman <rms@gnu.org> - - * bison.simple: - [__sun && __i386]: Include alloca.h. - -1996-07-30 Richard Stallman <rms@gnu.org> - - * src/bison.s1: Comment change. - - * src/bison.s1: Test _MSDOS_, not MSDOS. - -1996-07-30 Richard Stallman <rms@gnu.org> - - * bison.simple: Comment change. - - * bison.simple: Test _MSDOS_, not MSDOS. - -1996-06-01 Richard Stallman <rms@gnu.org> - - * src/reduce.c, src/reader.c, src/print.c, src/output.c, src/nullable.c, src/lex.c, src/lalr.c, src/getargs.c, src/derives.c, src/conflicts.c, src/closure.c, src/allocate.c: - Insert `_' macro around many string constants. - - * src/main.c: - Insert `_' macro around many string constants. - - (main): Call setlocale, bindtextdomain and textdomain. - - * src/system.h: [HAVE_LOCALE_H]: Include locale.h. - [! HAVE_LOCALE_H] (setlocale): Define as no-op. - [ENABLE_NLS]: Include libintl.h. - [ENABLE_NLS] (gettext): Define. - [! ENABLE_NLS] (bintextdomain, textdomain, _): Consolation definitions. - (N_, PACKAGE, LOCALEDIR): New macros. - -1996-06-01 Richard Stallman <rms@gnu.org> - - * POTFILES.in: New file. - - * Makefile.in (allocate.o): - Define target explicitly. - - * Makefile.in (CFLAGS): Set to @CFLAGS@. - (LDFLAGS): Set to @LDFLAGS@. - (configure): Run autoconf only if preceding `cd' succeeds. - (bison.s1): Redirect output to temporary file then move the - temporary to the target, rather than redirecting directly to bison.s1. - (clean): Remove config.status and config.log. - (distclean): Don't remove config.status here. - -1996-05-12 Richard Stallman <rms@gnu.org> - - * src/bison.s1: - (__yy_memcpy) [__cplusplus]: Reorder declarations of variables f and t. - -1996-05-12 Richard Stallman <rms@gnu.org> - - * bison.simple: - (__yy_memcpy) [__cplusplus]: Reorder declarations of variables f and t. - -1996-05-11 Richard Stallman <rms@gnu.org> - - * src/bison.s1 (__yy_memcpy): - Really reorder the args, as was supposedly done on Feb 14 1995. - (yyparse): Calls changed accordingly. - -1996-05-11 Richard Stallman <rms@gnu.org> - - * Makefile.in (dist): Don't use $(srcdir). - - * bison.simple (__yy_memcpy): - Really reorder the args, as was supposedly done on Feb 14 1995. - (yyparse): Calls changed accordingly. - -1996-01-27 Richard Stallman <rms@gnu.org> - - * src/output.c (output_rule_data): - Test YYERROR_VERBOSE in the conditional - around the definition of ttyname. - -1995-12-29 Richard Stallman <rms@gnu.org> - - * src/bison.s1: - Fix line numbers in #line commands. - -1995-12-29 Richard Stallman <rms@gnu.org> - - * bison.simple: - Fix line numbers in #line commands. - -1995-12-27 Richard Stallman <rms@gnu.org> - - * src/bison.s1 (YYPARSE_PARAM_DECL): - In C++, make it always null. - (YYPARSE_PARAM_ARG): New macro. - (yyparse): Use YYPARSE_PARAM_ARG. - -1995-12-27 Richard Stallman <rms@gnu.org> - - * bison.simple (YYPARSE_PARAM_DECL): - In C++, make it always null. - (YYPARSE_PARAM_ARG): New macro. - (yyparse): Use YYPARSE_PARAM_ARG. - -1995-11-29 Richard Stallman <rms@gnu.org> - - * doc/bison.texinfo: - Describe literal string tokens, %raw, %no_lines, %token_table. - -1995-11-29 Daniel Hagerty <hag@gnu.org> - - * doc/bison.texinfo: Fixed update date - -1995-10-16 Richard Stallman <rms@gnu.org> - - * src/version.c: Version 1.25. - -1995-10-16 Richard Stallman <rms@gnu.org> - - * NEWS: *** empty log message *** - -1995-10-16 Richard Stallman <rms@gnu.org> - - * doc/bison.1, doc/bison.rnh: - Add new options. - -1995-10-15 Richard Stallman <rms@gnu.org> - - * src/vmsgetargs.c, src/getargs.c: - Added -n, -k, and -raw switches. - (noparserflag, toknumflag, rawtoknumflag): New variables. - - * src/symtab.h (SALIAS): - New #define for adding aliases to %token. - (struct bucket): Added `alias' field. - - * src/reduce.c (reduce_grammar): - Revise error message. - (print_notices): Remove final `.' from error message. - - * src/reader.c (reader_output_yylsp): - New function. - (readgram): Use `#if 0' around code that accepted %command - inside grammar rules: The documentation doesn't allow it, - and it will fail since the %command processors scan for the next %. - (parse_token_decl): Extended the %token - declaration to allow a multi-character symbol as an alias. - (parse_thong_decl): New function. - (read_declarations): Added %thong declarations. - (read_declarations): Handle NOOP to deal with allowing - % declarations as another means to specify the flags. - (readgram): Allow %prec prior to semantics embedded in a rule. - (skip_to_char, read_declarations, copy_definition) - (parse_token_decl, parse_start_decl, parse_type_decl) - (parse_assoc_decl, parse_union_decl, parse_expect_decl) - (get_type_name, copy_guard, copy_action, readgram) - (get_type, packsymbols): Revised most error messages. - Changed `fatal' to `warnxxx' to avoid aborting for error. - Revised and use multiple warnxxx functions to avoid using VARARGS1. - (read_declarations): Improve the error message for - an invalid character. Do not abort. - (read_declarations, copy_guard, copy_action): Use - printable_version to avoid unprintable characters in printed output. - (parse_expect_decl): Error if argument to %expect exceeds 10 digits. - (parse_token_decl, parse_assoc_decl, parse_type_decl, get_type): - Allow the type of a non-terminal can be given - more than once, as long as all specifications give the same type. - - * src/output.c: - (output_headers, output_trailers, output, output_gram) - (output_rule_data): Implement noparserflag variable. - Implement toknumflag variable. - (output): Call reader_output_yylsp to output LTYPESTR. - - * src/main.c (main): - If reader sees an error, don't process the grammar. - (fatals): Updated to not use VARARGS1. - (printable_version, int_to_string, warn, warni, warns, warnss) - (warnsss): New error reporting functions. Avoid abort for error. - - * src/lex.h: - Added THONG and NOOP for alias processing. - Added SETOPT for the new code that allows setting options with %flags. - - * src/lex.c: - Include getopt.h. Add some extern decls. - (safegetc): New function to deal with EOF gracefully. - (literalchar); new function to deal with reading \ escapes. - (lex): Use literalchar. - (lex): Implemented "..." tokens. - (literalchar, lex, parse_percent_token): Made tokenbuffer - always contain the token. This includes growing the token - buffer while reading an integer. - (parse_percent_token): Replaced if-else statement with percent_table. - (parse_percent_token): Added % declarations as another - way to specify the flags -n, -l, and -r. Also added hooks for - -d, -k, -y, -v, -t, -p, -b, -o, but implementation requires - major changes to files.c. - (lex) Retain in the incoming stream a character following - an incorrect '/'. - (skip_white_space, lex): Revised most error messages - and changed fatal to warn to avoid aborting. - (percent_table): Added %thong declarations. - - * src/gram.h: Comment changes. - - * src/files.c (openfiles, open_extra_files, done): - Add faction flag - and actfile file. Handle noparserflag. Both for -n switch. - - * src/conflicts.c (resolve_sr_conflict): - Remove use of alloca. - -1995-06-01 Jim Meyering <meyering@gnu.org> - - * doc/bison.texinfo: *** empty log message *** - -1995-05-06 Richard Stallman <rms@gnu.org> - - * src/bison.s1: Comment change. - -1995-05-06 Richard Stallman <rms@gnu.org> - - * bison.simple: Comment change. - -1995-05-03 Richard Stallman <rms@gnu.org> - - * src/version.c: Version now 1.24. - - * src/bison.s1: Change distribution terms. - - * src/version.c: Version now 1.23. - -1995-05-03 Richard Stallman <rms@gnu.org> - - * doc/bison.texinfo: - Rewrite "Conditions for Using Bison". - Update version to 1.24. - -1995-05-03 Richard Stallman <rms@gnu.org> - - * bison.simple: Change distribution terms. - -1995-02-23 Richard Stallman <rms@gnu.org> - - * src/files.c: Test __VMS_POSIX as well as VMS. - -1995-02-14 Jim Meyering <meyering@gnu.org> - - * src/bison.s1 (__yy_memcpy): - Renamed from __yy_bcopy to avoid - confusion. Reverse FROM and TO arguments to be consistent with - those of memcpy. - -1995-02-14 Jim Meyering <meyering@gnu.org> - - * bison.simple (__yy_memcpy): - Renamed from __yy_bcopy to avoid - confusion. Reverse FROM and TO arguments to be consistent with - those of memcpy. - -1994-11-10 David J. MacKenzie <djm@gnu.org> - - * NEWS: reformat - - * NEWS: New file. - - * Makefile.in (DISTFILES): Include NEWS. - - * Makefile.in (DISTFILES): - Include install-sh, not install.sh. - - * configure.in: Update to Autoconf v2 macro names. - -1994-10-05 David J. MacKenzie <djm@gnu.org> - - * Makefile.in: fix typo - - * Makefile.in (prefix, exec_prefix): - Let configure set them. - -1994-09-28 David J. MacKenzie <djm@gnu.org> - - * Makefile.in: Set datadir to $(prefix)/share. - -1994-09-15 Richard Stallman <rms@gnu.org> - - * src/bison.s1: - Update copyright notice and GPL version. - -1994-09-15 Richard Stallman <rms@gnu.org> - - * bison.simple: - Update copyright notice and GPL version. - -1994-07-12 Richard Stallman <rms@gnu.org> - - * src/reduce.c, src/reader.c: - entered into RCS - -1994-05-05 David J. MacKenzie <djm@gnu.org> - - * Makefile.in: entered into RCS - -1994-03-26 Richard Stallman <rms@gnu.org> - - * src/bison.s1: entered into RCS - -1994-03-26 Richard Stallman <rms@gnu.org> - - * bison.simple: entered into RCS - -1994-03-25 Richard Stallman <rms@gnu.org> - - * src/main.c: entered into RCS - -1994-03-24 Richard Stallman <rms@gnu.org> - - * src/conflicts.c: entered into RCS - -1994-01-02 Richard Stallman <rms@gnu.org> - - * Makefile.in: *** empty log message *** - -1993-11-21 Richard Stallman <rms@gnu.org> - - * src/bison.s1: *** empty log message *** - -1993-11-21 Richard Stallman <rms@gnu.org> - - * doc/bison.texinfo: entered into RCS - - * doc/bison.texinfo: *** empty log message *** - -1993-11-21 Richard Stallman <rms@gnu.org> - - * bison.simple: *** empty log message *** - -1993-10-25 David J. MacKenzie <djm@gnu.org> - - * doc/bison.texinfo: *** empty log message *** - -1993-10-19 Richard Stallman <rms@gnu.org> - - * src/bison.s1: *** empty log message *** - -1993-10-19 Richard Stallman <rms@gnu.org> - - * bison.simple: *** empty log message *** - -1993-10-14 Richard Stallman <rms@gnu.org> - - * src/bison.s1: *** empty log message *** - -1993-10-14 Richard Stallman <rms@gnu.org> - - * bison.simple: *** empty log message *** - -1993-09-14 David J. MacKenzie <djm@gnu.org> - - * doc/bison.texinfo: *** empty log message *** - -1993-09-13 Noah Friedman <friedman@gnu.org> - - * Makefile.in: *** empty log message *** - -1993-09-10 Richard Stallman <rms@gnu.org> - - * src/conflicts.c: *** empty log message *** - - * src/system.h: entered into RCS - -1993-09-10 Richard Stallman <rms@gnu.org> - - * doc/bison.1: entered into RCS - -1993-09-06 Noah Friedman <friedman@gnu.org> - - * src/version.c: entered into RCS - -1993-09-06 Noah Friedman <friedman@gnu.org> - - * Makefile.in: *** empty log message *** - -1993-07-30 David J. MacKenzie <djm@gnu.org> - - * Makefile.in: *** empty log message *** - -1993-07-24 Richard Stallman <rms@gnu.org> - - * src/bison.s1: *** empty log message *** - -1993-07-24 Richard Stallman <rms@gnu.org> - - * bison.simple: *** empty log message *** - -1993-07-08 David J. MacKenzie <djm@gnu.org> - - * Makefile.in: *** empty log message *** - -1993-07-04 Richard Stallman <rms@gnu.org> - - * src/bison.s1: *** empty log message *** - -1993-07-04 Richard Stallman <rms@gnu.org> - - * bison.simple: *** empty log message *** - -1993-06-26 David J. MacKenzie <djm@gnu.org> - - * src/getargs.c: entered into RCS - -1993-06-26 David J. MacKenzie <djm@gnu.org> - - * doc/bison.texinfo: *** empty log message *** - - * doc/bison.1: New file. - -1993-06-25 Richard Stallman <rms@gnu.org> - - * src/getargs.c: New file. - -1993-06-16 Richard Stallman <rms@gnu.org> - - * src/bison.s1: *** empty log message *** - -1993-06-16 Richard Stallman <rms@gnu.org> - - * bison.simple: *** empty log message *** - -1993-06-03 Richard Stallman <rms@gnu.org> - - * src/bison.s1: New file. - -1993-06-03 Richard Stallman <rms@gnu.org> - - * doc/bison.texinfo: *** empty log message *** - -1993-06-03 Richard Stallman <rms@gnu.org> - - * bison.simple: New file. - -1993-05-19 Richard Stallman <rms@gnu.org> - - * doc/bison.texinfo: New file. - -1993-05-07 Noah Friedman <friedman@gnu.org> - - * Makefile.in: *** empty log message *** - -1993-04-28 Noah Friedman <friedman@gnu.org> - - * src/reader.c: *** empty log message *** - -1993-04-23 Noah Friedman <friedman@gnu.org> - - * src/alloc.h: entered into RCS - -1993-04-20 David J. MacKenzie <djm@gnu.org> - - * src/version.c: *** empty log message *** - - * src/files.c, src/allocate.c: - entered into RCS - - * src/reader.c: *** empty log message *** - - * src/lex.c: entered into RCS - - * src/conflicts.c: New file. - - * src/symtab.c: entered into RCS - - * src/alloc.h: New file. - - * src/LR0.c: entered into RCS - -1993-04-18 Noah Friedman <friedman@gnu.org> - - * src/reader.c: New file. - - * src/version.c: *** empty log message *** - -1993-04-18 Noah Friedman <friedman@gnu.org> - - * Makefile.in: *** empty log message *** - -1993-04-17 Noah Friedman <friedman@gnu.org> - - * Makefile.in: *** empty log message *** - -1993-04-15 Richard Stallman <rms@gnu.org> - - * src/main.c, src/files.c: - New file. - -1993-04-15 Noah Friedman <friedman@gnu.org> - - * configure.in: entered into RCS - - * configure.in: *** empty log message *** - - * configure.in: New file. - -1993-04-14 Richard Stallman <rms@gnu.org> - - * Makefile.in: New file. - -1993-04-13 Richard Stallman <rms@gnu.org> - - * src/version.c: New file. - -1993-03-25 Richard Stallman <rms@gnu.org> - - * src/output.c: entered into RCS - -1992-09-25 Richard Stallman <rms@gnu.org> - - * configure.bat: entered into RCS - -1992-06-22 Richard Stallman <rms@gnu.org> - - * src/vmsgetargs.c: entered into RCS - -1992-06-22 Richard Stallman <rms@gnu.org> - - * doc/bison.rnh: entered into RCS - -1992-04-20 David J. MacKenzie <djm@gnu.org> - - * README: entered into RCS - -1992-01-22 Richard Stallman <rms@gnu.org> - - * src/machine.h: entered into RCS - -1991-12-21 Richard Stallman <rms@gnu.org> - - * src/lalr.c, src/closure.c: - entered into RCS - -1991-12-20 Richard Stallman <rms@gnu.org> - - * src/state.h: entered into RCS - -1991-12-18 Richard Stallman <rms@gnu.org> - - * src/print.c, src/nullable.c, src/derives.c: - entered into RCS - -1991-11-03 David J. MacKenzie <djm@gnu.org> - - * src/warshall.c, src/types.h, src/symtab.h, src/lex.h, src/gram.c, src/gram.h, src/files.h: - entered into RCS - -1988-09-09 Richard Stallman <rms@gnu.org> - - * src/bison.hairy: entered into RCS - -1987-12-16 Richard Stallman <rms@gnu.org> - - * REFERENCES: entered into RCS - - - ----- - - Copyright (C) 1987, 1988, 1991, 1992, 1993, 1994, 1995, 1996, - 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 - Free Software Foundation, Inc. - - Copying and distribution of this file, with or without - modification, are permitted provided the copyright notice and this - notice are preserved. diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/INSTALL b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/INSTALL deleted file mode 100644 index 8b82ade0..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/INSTALL +++ /dev/null @@ -1,291 +0,0 @@ -Installation Instructions -************************* - -Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005, -2006, 2007, 2008 Free Software Foundation, Inc. - - This file is free documentation; the Free Software Foundation gives -unlimited permission to copy, distribute and modify it. - -Basic Installation -================== - - Briefly, the shell commands `./configure; make; make install' should -configure, build, and install this package. 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FILE defaults to `/dev/null' to - disable caching. - -`--config-cache' -`-C' - Alias for `--cache-file=config.cache'. - -`--quiet' -`--silent' -`-q' - Do not print messages saying which checks are being made. To - suppress all normal output, redirect it to `/dev/null' (any error - messages will still be shown). - -`--srcdir=DIR' - Look for the package's source code in directory DIR. Usually - `configure' can determine that directory automatically. - -`--prefix=DIR' - Use DIR as the installation prefix. *Note Installation Names:: - for more details, including other options available for fine-tuning - the installation locations. - -`--no-create' -`-n' - Run the configure checks, but stop before creating any output - files. - -`configure' also accepts some other, not widely useful, options. Run -`configure --help' for more details. - diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/NEWS b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/NEWS deleted file mode 100644 index 7d1a444d..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/NEWS +++ /dev/null @@ -1,1067 +0,0 @@ -Bison News ----------- - -* Changes in version 2.4.1 (2008-12-11): - -** In the GLR defines file, unexpanded M4 macros in the yylval and yylloc - declarations have been fixed. - -** Temporary hack for adding a semicolon to the user action. - - Bison used to prepend a trailing semicolon at the end of the user - action for reductions. This allowed actions such as - - exp: exp "+" exp { $$ = $1 + $3 }; - - instead of - - exp: exp "+" exp { $$ = $1 + $3; }; - - Some grammars still depend on this `feature'. Bison 2.4.1 restores - the previous behavior in the case of C output (specifically, when - neither %language or %skeleton or equivalent command-line options - are used) to leave more time for grammars depending on the old - behavior to be adjusted. Future releases of Bison will disable this - feature. - -** A few minor improvements to the Bison manual. - -* Changes in version 2.4 (2008-11-02): - -** %language is an experimental feature. - - We first introduced this feature in test release 2.3b as a cleaner - alternative to %skeleton. Since then, we have discussed the possibility of - modifying its effect on Bison's output file names. Thus, in this release, - we consider %language to be an experimental feature that will likely evolve - in future releases. - -** Forward compatibility with GNU M4 has been improved. - -** Several bugs in the C++ skeleton and the experimental Java skeleton have been - fixed. - -* Changes in version 2.3b (2008-05-27): - -** The quotes around NAME that used to be required in the following directive - are now deprecated: - - %define NAME "VALUE" - -** The directive `%pure-parser' is now deprecated in favor of: - - %define api.pure - - which has the same effect except that Bison is more careful to warn about - unreasonable usage in the latter case. - -** Push Parsing - - Bison can now generate an LALR(1) parser in C with a push interface. That - is, instead of invoking `yyparse', which pulls tokens from `yylex', you can - push one token at a time to the parser using `yypush_parse', which will - return to the caller after processing each token. By default, the push - interface is disabled. Either of the following directives will enable it: - - %define api.push_pull "push" // Just push; does not require yylex. - %define api.push_pull "both" // Push and pull; requires yylex. - - See the new section `A Push Parser' in the Bison manual for details. - - The current push parsing interface is experimental and may evolve. More user - feedback will help to stabilize it. - -** The -g and --graph options now output graphs in Graphviz DOT format, - not VCG format. Like --graph, -g now also takes an optional FILE argument - and thus cannot be bundled with other short options. - -** Java - - Bison can now generate an LALR(1) parser in Java. The skeleton is - `data/lalr1.java'. Consider using the new %language directive instead of - %skeleton to select it. - - See the new section `Java Parsers' in the Bison manual for details. - - The current Java interface is experimental and may evolve. More user - feedback will help to stabilize it. - -** %language - - This new directive specifies the programming language of the generated - parser, which can be C (the default), C++, or Java. Besides the skeleton - that Bison uses, the directive affects the names of the generated files if - the grammar file's name ends in ".y". - -** XML Automaton Report - - Bison can now generate an XML report of the LALR(1) automaton using the new - `--xml' option. The current XML schema is experimental and may evolve. More - user feedback will help to stabilize it. - -** The grammar file may now specify the name of the parser header file using - %defines. For example: - - %defines "parser.h" - -** When reporting useless rules, useless nonterminals, and unused terminals, - Bison now employs the terms "useless in grammar" instead of "useless", - "useless in parser" instead of "never reduced", and "unused in grammar" - instead of "unused". - -** Unreachable State Removal - - Previously, Bison sometimes generated parser tables containing unreachable - states. A state can become unreachable during conflict resolution if Bison - disables a shift action leading to it from a predecessor state. Bison now: - - 1. Removes unreachable states. - - 2. Does not report any conflicts that appeared in unreachable states. - WARNING: As a result, you may need to update %expect and %expect-rr - directives in existing grammar files. - - 3. For any rule used only in such states, Bison now reports the rule as - "useless in parser due to conflicts". - - This feature can be disabled with the following directive: - - %define lr.keep_unreachable_states - - See the %define entry in the `Bison Declaration Summary' in the Bison manual - for further discussion. - -** Lookahead Set Correction in the `.output' Report - - When instructed to generate a `.output' file including lookahead sets - (using `--report=lookahead', for example), Bison now prints each reduction's - lookahead set only next to the associated state's one item that (1) is - associated with the same rule as the reduction and (2) has its dot at the end - of its RHS. Previously, Bison also erroneously printed the lookahead set - next to all of the state's other items associated with the same rule. This - bug affected only the `.output' file and not the generated parser source - code. - -** --report-file=FILE is a new option to override the default `.output' file - name. - -** The `=' that used to be required in the following directives is now - deprecated: - - %file-prefix "parser" - %name-prefix "c_" - %output "parser.c" - -** An Alternative to `%{...%}' -- `%code QUALIFIER {CODE}' - - Bison 2.3a provided a new set of directives as a more flexible alternative to - the traditional Yacc prologue blocks. Those have now been consolidated into - a single %code directive with an optional qualifier field, which identifies - the purpose of the code and thus the location(s) where Bison should generate - it: - - 1. `%code {CODE}' replaces `%after-header {CODE}' - 2. `%code requires {CODE}' replaces `%start-header {CODE}' - 3. `%code provides {CODE}' replaces `%end-header {CODE}' - 4. `%code top {CODE}' replaces `%before-header {CODE}' - - See the %code entries in section `Bison Declaration Summary' in the Bison - manual for a summary of the new functionality. See the new section `Prologue - Alternatives' for a detailed discussion including the advantages of %code - over the traditional Yacc prologues. - - The prologue alternatives are experimental. More user feedback will help to - determine whether they should become permanent features. - -** Revised warning: unset or unused mid-rule values - - Since Bison 2.2, Bison has warned about mid-rule values that are set but not - used within any of the actions of the parent rule. For example, Bison warns - about unused $2 in: - - exp: '1' { $$ = 1; } '+' exp { $$ = $1 + $4; }; - - Now, Bison also warns about mid-rule values that are used but not set. For - example, Bison warns about unset $$ in the mid-rule action in: - - exp: '1' { $1 = 1; } '+' exp { $$ = $2 + $4; }; - - However, Bison now disables both of these warnings by default since they - sometimes prove to be false alarms in existing grammars employing the Yacc - constructs $0 or $-N (where N is some positive integer). - - To enable these warnings, specify the option `--warnings=midrule-values' or - `-W', which is a synonym for `--warnings=all'. - -** Default %destructor or %printer with `<*>' or `<>' - - Bison now recognizes two separate kinds of default %destructor's and - %printer's: - - 1. Place `<*>' in a %destructor/%printer symbol list to define a default - %destructor/%printer for all grammar symbols for which you have formally - declared semantic type tags. - - 2. Place `<>' in a %destructor/%printer symbol list to define a default - %destructor/%printer for all grammar symbols without declared semantic - type tags. - - Bison no longer supports the `%symbol-default' notation from Bison 2.3a. - `<*>' and `<>' combined achieve the same effect with one exception: Bison no - longer applies any %destructor to a mid-rule value if that mid-rule value is - not actually ever referenced using either $$ or $n in a semantic action. - - The default %destructor's and %printer's are experimental. More user - feedback will help to determine whether they should become permanent - features. - - See the section `Freeing Discarded Symbols' in the Bison manual for further - details. - -** %left, %right, and %nonassoc can now declare token numbers. This is required - by POSIX. However, see the end of section `Operator Precedence' in the Bison - manual for a caveat concerning the treatment of literal strings. - -** The nonfunctional --no-parser, -n, and %no-parser options have been - completely removed from Bison. - -* Changes in version 2.3a, 2006-09-13: - -** Instead of %union, you can define and use your own union type - YYSTYPE if your grammar contains at least one <type> tag. - Your YYSTYPE need not be a macro; it can be a typedef. - This change is for compatibility with other Yacc implementations, - and is required by POSIX. - -** Locations columns and lines start at 1. - In accordance with the GNU Coding Standards and Emacs. - -** You may now declare per-type and default %destructor's and %printer's: - - For example: - - %union { char *string; } - %token <string> STRING1 - %token <string> STRING2 - %type <string> string1 - %type <string> string2 - %union { char character; } - %token <character> CHR - %type <character> chr - %destructor { free ($$); } %symbol-default - %destructor { free ($$); printf ("%d", @$.first_line); } STRING1 string1 - %destructor { } <character> - - guarantees that, when the parser discards any user-defined symbol that has a - semantic type tag other than `<character>', it passes its semantic value to - `free'. However, when the parser discards a `STRING1' or a `string1', it - also prints its line number to `stdout'. It performs only the second - `%destructor' in this case, so it invokes `free' only once. - - [Although we failed to mention this here in the 2.3a release, the default - %destructor's and %printer's were experimental, and they were rewritten in - future versions.] - -** Except for LALR(1) parsers in C with POSIX Yacc emulation enabled (with `-y', - `--yacc', or `%yacc'), Bison no longer generates #define statements for - associating token numbers with token names. Removing the #define statements - helps to sanitize the global namespace during preprocessing, but POSIX Yacc - requires them. Bison still generates an enum for token names in all cases. - -** Handling of traditional Yacc prologue blocks is now more consistent but - potentially incompatible with previous releases of Bison. - - As before, you declare prologue blocks in your grammar file with the - `%{ ... %}' syntax. To generate the pre-prologue, Bison concatenates all - prologue blocks that you've declared before the first %union. To generate - the post-prologue, Bison concatenates all prologue blocks that you've - declared after the first %union. - - Previous releases of Bison inserted the pre-prologue into both the header - file and the code file in all cases except for LALR(1) parsers in C. In the - latter case, Bison inserted it only into the code file. For parsers in C++, - the point of insertion was before any token definitions (which associate - token numbers with names). For parsers in C, the point of insertion was - after the token definitions. - - Now, Bison never inserts the pre-prologue into the header file. In the code - file, it always inserts it before the token definitions. - -** Bison now provides a more flexible alternative to the traditional Yacc - prologue blocks: %before-header, %start-header, %end-header, and - %after-header. - - For example, the following declaration order in the grammar file reflects the - order in which Bison will output these code blocks. However, you are free to - declare these code blocks in your grammar file in whatever order is most - convenient for you: - - %before-header { - /* Bison treats this block like a pre-prologue block: it inserts it into - * the code file before the contents of the header file. It does *not* - * insert it into the header file. This is a good place to put - * #include's that you want at the top of your code file. A common - * example is `#include "system.h"'. */ - } - %start-header { - /* Bison inserts this block into both the header file and the code file. - * In both files, the point of insertion is before any Bison-generated - * token, semantic type, location type, and class definitions. This is a - * good place to define %union dependencies, for example. */ - } - %union { - /* Unlike the traditional Yacc prologue blocks, the output order for the - * new %*-header blocks is not affected by their declaration position - * relative to any %union in the grammar file. */ - } - %end-header { - /* Bison inserts this block into both the header file and the code file. - * In both files, the point of insertion is after the Bison-generated - * definitions. This is a good place to declare or define public - * functions or data structures that depend on the Bison-generated - * definitions. */ - } - %after-header { - /* Bison treats this block like a post-prologue block: it inserts it into - * the code file after the contents of the header file. It does *not* - * insert it into the header file. This is a good place to declare or - * define internal functions or data structures that depend on the - * Bison-generated definitions. */ - } - - If you have multiple occurrences of any one of the above declarations, Bison - will concatenate the contents in declaration order. - - [Although we failed to mention this here in the 2.3a release, the prologue - alternatives were experimental, and they were rewritten in future versions.] - -** The option `--report=look-ahead' has been changed to `--report=lookahead'. - The old spelling still works, but is not documented and may be removed - in a future release. - -* Changes in version 2.3, 2006-06-05: - -** GLR grammars should now use `YYRECOVERING ()' instead of `YYRECOVERING', - for compatibility with LALR(1) grammars. - -** It is now documented that any definition of YYSTYPE or YYLTYPE should - be to a type name that does not contain parentheses or brackets. - -* Changes in version 2.2, 2006-05-19: - -** The distribution terms for all Bison-generated parsers now permit - using the parsers in nonfree programs. Previously, this permission - was granted only for Bison-generated LALR(1) parsers in C. - -** %name-prefix changes the namespace name in C++ outputs. - -** The C++ parsers export their token_type. - -** Bison now allows multiple %union declarations, and concatenates - their contents together. - -** New warning: unused values - Right-hand side symbols whose values are not used are reported, - if the symbols have destructors. For instance: - - exp: exp "?" exp ":" exp { $1 ? $1 : $3; } - | exp "+" exp - ; - - will trigger a warning about $$ and $5 in the first rule, and $3 in - the second ($1 is copied to $$ by the default rule). This example - most likely contains three errors, and could be rewritten as: - - exp: exp "?" exp ":" exp - { $$ = $1 ? $3 : $5; free ($1 ? $5 : $3); free ($1); } - | exp "+" exp - { $$ = $1 ? $1 : $3; if ($1) free ($3); } - ; - - However, if the original actions were really intended, memory leaks - and all, the warnings can be suppressed by letting Bison believe the - values are used, e.g.: - - exp: exp "?" exp ":" exp { $1 ? $1 : $3; (void) ($$, $5); } - | exp "+" exp { $$ = $1; (void) $3; } - ; - - If there are mid-rule actions, the warning is issued if no action - uses it. The following triggers no warning: $1 and $3 are used. - - exp: exp { push ($1); } '+' exp { push ($3); sum (); }; - - The warning is intended to help catching lost values and memory leaks. - If a value is ignored, its associated memory typically is not reclaimed. - -** %destructor vs. YYABORT, YYACCEPT, and YYERROR. - Destructors are now called when user code invokes YYABORT, YYACCEPT, - and YYERROR, for all objects on the stack, other than objects - corresponding to the right-hand side of the current rule. - -** %expect, %expect-rr - Incorrect numbers of expected conflicts are now actual errors, - instead of warnings. - -** GLR, YACC parsers. - The %parse-params are available in the destructors (and the - experimental printers) as per the documentation. - -** Bison now warns if it finds a stray `$' or `@' in an action. - -** %require "VERSION" - This specifies that the grammar file depends on features implemented - in Bison version VERSION or higher. - -** lalr1.cc: The token and value types are now class members. - The tokens were defined as free form enums and cpp macros. YYSTYPE - was defined as a free form union. They are now class members: - tokens are enumerations of the `yy::parser::token' struct, and the - semantic values have the `yy::parser::semantic_type' type. - - If you do not want or can update to this scheme, the directive - `%define "global_tokens_and_yystype" "1"' triggers the global - definition of tokens and YYSTYPE. This change is suitable both - for previous releases of Bison, and this one. - - If you wish to update, then make sure older version of Bison will - fail using `%require "2.2"'. - -** DJGPP support added. - -* Changes in version 2.1, 2005-09-16: - -** The C++ lalr1.cc skeleton supports %lex-param. - -** Bison-generated parsers now support the translation of diagnostics like - "syntax error" into languages other than English. The default - language is still English. For details, please see the new - Internationalization section of the Bison manual. Software - distributors should also see the new PACKAGING file. Thanks to - Bruno Haible for this new feature. - -** Wording in the Bison-generated parsers has been changed slightly to - simplify translation. In particular, the message "memory exhausted" - has replaced "parser stack overflow", as the old message was not - always accurate for modern Bison-generated parsers. - -** Destructors are now called when the parser aborts, for all symbols left - behind on the stack. Also, the start symbol is now destroyed after a - successful parse. In both cases, the behavior was formerly inconsistent. - -** When generating verbose diagnostics, Bison-generated parsers no longer - quote the literal strings associated with tokens. For example, for - a syntax error associated with '%token NUM "number"' they might - print 'syntax error, unexpected number' instead of 'syntax error, - unexpected "number"'. - -* Changes in version 2.0, 2004-12-25: - -** Possibly-incompatible changes - - - Bison-generated parsers no longer default to using the alloca function - (when available) to extend the parser stack, due to widespread - problems in unchecked stack-overflow detection. You can "#define - YYSTACK_USE_ALLOCA 1" to require the use of alloca, but please read - the manual to determine safe values for YYMAXDEPTH in that case. - - - Error token location. - During error recovery, the location of the syntax error is updated - to cover the whole sequence covered by the error token: it includes - the shifted symbols thrown away during the first part of the error - recovery, and the lookahead rejected during the second part. - - - Semicolon changes: - . Stray semicolons are no longer allowed at the start of a grammar. - . Semicolons are now required after in-grammar declarations. - - - Unescaped newlines are no longer allowed in character constants or - string literals. They were never portable, and GCC 3.4.0 has - dropped support for them. Better diagnostics are now generated if - forget a closing quote. - - - NUL bytes are no longer allowed in Bison string literals, unfortunately. - -** New features - - - GLR grammars now support locations. - - - New directive: %initial-action. - This directive allows the user to run arbitrary code (including - initializing @$) from yyparse before parsing starts. - - - A new directive "%expect-rr N" specifies the expected number of - reduce/reduce conflicts in GLR parsers. - - - %token numbers can now be hexadecimal integers, e.g., `%token FOO 0x12d'. - This is a GNU extension. - - - The option `--report=lookahead' was changed to `--report=look-ahead'. - [However, this was changed back after 2.3.] - - - Experimental %destructor support has been added to lalr1.cc. - - - New configure option --disable-yacc, to disable installation of the - yacc command and -ly library introduced in 1.875 for POSIX conformance. - -** Bug fixes - - - For now, %expect-count violations are now just warnings, not errors. - This is for compatibility with Bison 1.75 and earlier (when there are - reduce/reduce conflicts) and with Bison 1.30 and earlier (when there - are too many or too few shift/reduce conflicts). However, in future - versions of Bison we plan to improve the %expect machinery so that - these violations will become errors again. - - - Within Bison itself, numbers (e.g., goto numbers) are no longer - arbitrarily limited to 16-bit counts. - - - Semicolons are now allowed before "|" in grammar rules, as POSIX requires. - -* Changes in version 1.875, 2003-01-01: - -** The documentation license has been upgraded to version 1.2 - of the GNU Free Documentation License. - -** syntax error processing - - - In Yacc-style parsers YYLLOC_DEFAULT is now used to compute error - locations too. This fixes bugs in error-location computation. - - - %destructor - It is now possible to reclaim the memory associated to symbols - discarded during error recovery. This feature is still experimental. - - - %error-verbose - This new directive is preferred over YYERROR_VERBOSE. - - - #defining yyerror to steal internal variables is discouraged. - It is not guaranteed to work forever. - -** POSIX conformance - - - Semicolons are once again optional at the end of grammar rules. - This reverts to the behavior of Bison 1.33 and earlier, and improves - compatibility with Yacc. - - - `parse error' -> `syntax error' - Bison now uniformly uses the term `syntax error'; formerly, the code - and manual sometimes used the term `parse error' instead. POSIX - requires `syntax error' in diagnostics, and it was thought better to - be consistent. - - - The documentation now emphasizes that yylex and yyerror must be - declared before use. C99 requires this. - - - Bison now parses C99 lexical constructs like UCNs and - backslash-newline within C escape sequences, as POSIX 1003.1-2001 requires. - - - File names are properly escaped in C output. E.g., foo\bar.y is - output as "foo\\bar.y". - - - Yacc command and library now available - The Bison distribution now installs a `yacc' command, as POSIX requires. - Also, Bison now installs a small library liby.a containing - implementations of Yacc-compatible yyerror and main functions. - This library is normally not useful, but POSIX requires it. - - - Type clashes now generate warnings, not errors. - - - If the user does not define YYSTYPE as a macro, Bison now declares it - using typedef instead of defining it as a macro. - For consistency, YYLTYPE is also declared instead of defined. - -** Other compatibility issues - - - %union directives can now have a tag before the `{', e.g., the - directive `%union foo {...}' now generates the C code - `typedef union foo { ... } YYSTYPE;'; this is for Yacc compatibility. - The default union tag is `YYSTYPE', for compatibility with Solaris 9 Yacc. - For consistency, YYLTYPE's struct tag is now `YYLTYPE' not `yyltype'. - This is for compatibility with both Yacc and Bison 1.35. - - - `;' is output before the terminating `}' of an action, for - compatibility with Bison 1.35. - - - Bison now uses a Yacc-style format for conflict reports, e.g., - `conflicts: 2 shift/reduce, 1 reduce/reduce'. - - - `yystype' and `yyltype' are now obsolescent macros instead of being - typedefs or tags; they are no longer documented and are planned to be - withdrawn in a future release. - -** GLR parser notes - - - GLR and inline - Users of Bison have to decide how they handle the portability of the - C keyword `inline'. - - - `parsing stack overflow...' -> `parser stack overflow' - GLR parsers now report `parser stack overflow' as per the Bison manual. - -** Bison now warns if it detects conflicting outputs to the same file, - e.g., it generates a warning for `bison -d -o foo.h foo.y' since - that command outputs both code and header to foo.h. - -** #line in output files - - --no-line works properly. - -** Bison can no longer be built by a K&R C compiler; it requires C89 or - later to be built. This change originally took place a few versions - ago, but nobody noticed until we recently asked someone to try - building Bison with a K&R C compiler. - -* Changes in version 1.75, 2002-10-14: - -** Bison should now work on 64-bit hosts. - -** Indonesian translation thanks to Tedi Heriyanto. - -** GLR parsers - Fix spurious parse errors. - -** Pure parsers - Some people redefine yyerror to steal yyparse' private variables. - Reenable this trick until an official feature replaces it. - -** Type Clashes - In agreement with POSIX and with other Yaccs, leaving a default - action is valid when $$ is untyped, and $1 typed: - - untyped: ... typed; - - but the converse remains an error: - - typed: ... untyped; - -** Values of mid-rule actions - The following code: - - foo: { ... } { $$ = $1; } ... - - was incorrectly rejected: $1 is defined in the second mid-rule - action, and is equal to the $$ of the first mid-rule action. - -* Changes in version 1.50, 2002-10-04: - -** GLR parsing - The declaration - %glr-parser - causes Bison to produce a Generalized LR (GLR) parser, capable of handling - almost any context-free grammar, ambiguous or not. The new declarations - %dprec and %merge on grammar rules allow parse-time resolution of - ambiguities. Contributed by Paul Hilfinger. - - Unfortunately Bison 1.50 does not work properly on 64-bit hosts - like the Alpha, so please stick to 32-bit hosts for now. - -** Output Directory - When not in Yacc compatibility mode, when the output file was not - specified, running `bison foo/bar.y' created `foo/bar.c'. It - now creates `bar.c'. - -** Undefined token - The undefined token was systematically mapped to 2 which prevented - the use of 2 by the user. This is no longer the case. - -** Unknown token numbers - If yylex returned an out of range value, yyparse could die. This is - no longer the case. - -** Error token - According to POSIX, the error token must be 256. - Bison extends this requirement by making it a preference: *if* the - user specified that one of her tokens is numbered 256, then error - will be mapped onto another number. - -** Verbose error messages - They no longer report `..., expecting error or...' for states where - error recovery is possible. - -** End token - Defaults to `$end' instead of `$'. - -** Error recovery now conforms to documentation and to POSIX - When a Bison-generated parser encounters a syntax error, it now pops - the stack until it finds a state that allows shifting the error - token. Formerly, it popped the stack until it found a state that - allowed some non-error action other than a default reduction on the - error token. The new behavior has long been the documented behavior, - and has long been required by POSIX. For more details, please see - Paul Eggert, "Reductions during Bison error handling" (2002-05-20) - <http://lists.gnu.org/archive/html/bug-bison/2002-05/msg00038.html>. - -** Traces - Popped tokens and nonterminals are now reported. - -** Larger grammars - Larger grammars are now supported (larger token numbers, larger grammar - size (= sum of the LHS and RHS lengths), larger LALR tables). - Formerly, many of these numbers ran afoul of 16-bit limits; - now these limits are 32 bits on most hosts. - -** Explicit initial rule - Bison used to play hacks with the initial rule, which the user does - not write. It is now explicit, and visible in the reports and - graphs as rule 0. - -** Useless rules - Before, Bison reported the useless rules, but, although not used, - included them in the parsers. They are now actually removed. - -** Useless rules, useless nonterminals - They are now reported, as a warning, with their locations. - -** Rules never reduced - Rules that can never be reduced because of conflicts are now - reported. - -** Incorrect `Token not used' - On a grammar such as - - %token useless useful - %% - exp: '0' %prec useful; - - where a token was used to set the precedence of the last rule, - bison reported both `useful' and `useless' as useless tokens. - -** Revert the C++ namespace changes introduced in 1.31 - as they caused too many portability hassles. - -** Default locations - By an accident of design, the default computation of @$ was - performed after another default computation was performed: @$ = @1. - The latter is now removed: YYLLOC_DEFAULT is fully responsible of - the computation of @$. - -** Token end-of-file - The token end of file may be specified by the user, in which case, - the user symbol is used in the reports, the graphs, and the verbose - error messages instead of `$end', which remains being the default. - For instance - %token MYEOF 0 - or - %token MYEOF 0 "end of file" - -** Semantic parser - This old option, which has been broken for ages, is removed. - -** New translations - Brazilian Portuguese, thanks to Alexandre Folle de Menezes. - Croatian, thanks to Denis Lackovic. - -** Incorrect token definitions - When given `%token 'a' "A"', Bison used to output `#define 'a' 65'. - -** Token definitions as enums - Tokens are output both as the traditional #define's, and, provided - the compiler supports ANSI C or is a C++ compiler, as enums. - This lets debuggers display names instead of integers. - -** Reports - In addition to --verbose, bison supports --report=THINGS, which - produces additional information: - - itemset - complete the core item sets with their closure - - lookahead [changed to `look-ahead' in 1.875e through 2.3, but changed back] - explicitly associate lookahead tokens to items - - solved - describe shift/reduce conflicts solving. - Bison used to systematically output this information on top of - the report. Solved conflicts are now attached to their states. - -** Type clashes - Previous versions don't complain when there is a type clash on - the default action if the rule has a mid-rule action, such as in: - - %type <foo> bar - %% - bar: '0' {} '0'; - - This is fixed. - -** GNU M4 is now required when using Bison. - -* Changes in version 1.35, 2002-03-25: - -** C Skeleton - Some projects use Bison's C parser with C++ compilers, and define - YYSTYPE as a class. The recent adjustment of C parsers for data - alignment and 64 bit architectures made this impossible. - - Because for the time being no real solution for C++ parser - generation exists, kludges were implemented in the parser to - maintain this use. In the future, when Bison has C++ parsers, this - kludge will be disabled. - - This kludge also addresses some C++ problems when the stack was - extended. - -* Changes in version 1.34, 2002-03-12: - -** File name clashes are detected - $ bison foo.y -d -o foo.x - fatal error: header and parser would both be named `foo.x' - -** A missing `;' at the end of a rule triggers a warning - In accordance with POSIX, and in agreement with other - Yacc implementations, Bison will mandate this semicolon in the near - future. This eases the implementation of a Bison parser of Bison - grammars by making this grammar LALR(1) instead of LR(2). To - facilitate the transition, this release introduces a warning. - -** Revert the C++ namespace changes introduced in 1.31, as they caused too - many portability hassles. - -** DJGPP support added. - -** Fix test suite portability problems. - -* Changes in version 1.33, 2002-02-07: - -** Fix C++ issues - Groff could not be compiled for the definition of size_t was lacking - under some conditions. - -** Catch invalid @n - As is done with $n. - -* Changes in version 1.32, 2002-01-23: - -** Fix Yacc output file names - -** Portability fixes - -** Italian, Dutch translations - -* Changes in version 1.31, 2002-01-14: - -** Many Bug Fixes - -** GNU Gettext and %expect - GNU Gettext asserts 10 s/r conflicts, but there are 7. Now that - Bison dies on incorrect %expectations, we fear there will be - too many bug reports for Gettext, so _for the time being_, %expect - does not trigger an error when the input file is named `plural.y'. - -** Use of alloca in parsers - If YYSTACK_USE_ALLOCA is defined to 0, then the parsers will use - malloc exclusively. Since 1.29, but was not NEWS'ed. - - alloca is used only when compiled with GCC, to avoid portability - problems as on AIX. - -** yyparse now returns 2 if memory is exhausted; formerly it dumped core. - -** When the generated parser lacks debugging code, YYDEBUG is now 0 - (as POSIX requires) instead of being undefined. - -** User Actions - Bison has always permitted actions such as { $$ = $1 }: it adds the - ending semicolon. Now if in Yacc compatibility mode, the semicolon - is no longer output: one has to write { $$ = $1; }. - -** Better C++ compliance - The output parsers try to respect C++ namespaces. - [This turned out to be a failed experiment, and it was reverted later.] - -** Reduced Grammars - Fixed bugs when reporting useless nonterminals. - -** 64 bit hosts - The parsers work properly on 64 bit hosts. - -** Error messages - Some calls to strerror resulted in scrambled or missing error messages. - -** %expect - When the number of shift/reduce conflicts is correct, don't issue - any warning. - -** The verbose report includes the rule line numbers. - -** Rule line numbers are fixed in traces. - -** Swedish translation - -** Parse errors - Verbose parse error messages from the parsers are better looking. - Before: parse error: unexpected `'/'', expecting `"number"' or `'-'' or `'('' - Now: parse error: unexpected '/', expecting "number" or '-' or '(' - -** Fixed parser memory leaks. - When the generated parser was using malloc to extend its stacks, the - previous allocations were not freed. - -** Fixed verbose output file. - Some newlines were missing. - Some conflicts in state descriptions were missing. - -** Fixed conflict report. - Option -v was needed to get the result. - -** %expect - Was not used. - Mismatches are errors, not warnings. - -** Fixed incorrect processing of some invalid input. - -** Fixed CPP guards: 9foo.h uses BISON_9FOO_H instead of 9FOO_H. - -** Fixed some typos in the documentation. - -** %token MY_EOF 0 is supported. - Before, MY_EOF was silently renumbered as 257. - -** doc/refcard.tex is updated. - -** %output, %file-prefix, %name-prefix. - New. - -** --output - New, aliasing `--output-file'. - -* Changes in version 1.30, 2001-10-26: - -** `--defines' and `--graph' have now an optional argument which is the - output file name. `-d' and `-g' do not change; they do not take any - argument. - -** `%source_extension' and `%header_extension' are removed, failed - experiment. - -** Portability fixes. - -* Changes in version 1.29, 2001-09-07: - -** The output file does not define const, as this caused problems when used - with common autoconfiguration schemes. If you still use ancient compilers - that lack const, compile with the equivalent of the C compiler option - `-Dconst='. autoconf's AC_C_CONST macro provides one way to do this. - -** Added `-g' and `--graph'. - -** The Bison manual is now distributed under the terms of the GNU FDL. - -** The input and the output files has automatically a similar extension. - -** Russian translation added. - -** NLS support updated; should hopefully be less troublesome. - -** Added the old Bison reference card. - -** Added `--locations' and `%locations'. - -** Added `-S' and `--skeleton'. - -** `%raw', `-r', `--raw' is disabled. - -** Special characters are escaped when output. This solves the problems - of the #line lines with path names including backslashes. - -** New directives. - `%yacc', `%fixed_output_files', `%defines', `%no_parser', `%verbose', - `%debug', `%source_extension' and `%header_extension'. - -** @$ - Automatic location tracking. - -* Changes in version 1.28, 1999-07-06: - -** Should compile better now with K&R compilers. - -** Added NLS. - -** Fixed a problem with escaping the double quote character. - -** There is now a FAQ. - -* Changes in version 1.27: - -** The make rule which prevented bison.simple from being created on - some systems has been fixed. - -* Changes in version 1.26: - -** Bison now uses automake. - -** New mailing lists: <bug-bison@gnu.org> and <help-bison@gnu.org>. - -** Token numbers now start at 257 as previously documented, not 258. - -** Bison honors the TMPDIR environment variable. - -** A couple of buffer overruns have been fixed. - -** Problems when closing files should now be reported. - -** Generated parsers should now work even on operating systems which do - not provide alloca(). - -* Changes in version 1.25, 1995-10-16: - -** Errors in the input grammar are not fatal; Bison keeps reading -the grammar file, and reports all the errors found in it. - -** Tokens can now be specified as multiple-character strings: for -example, you could use "<=" for a token which looks like <=, instead -of chosing a name like LESSEQ. - -** The %token_table declaration says to write a table of tokens (names -and numbers) into the parser file. The yylex function can use this -table to recognize multiple-character string tokens, or for other -purposes. - -** The %no_lines declaration says not to generate any #line preprocessor -directives in the parser file. - -** The %raw declaration says to use internal Bison token numbers, not -Yacc-compatible token numbers, when token names are defined as macros. - -** The --no-parser option produces the parser tables without including -the parser engine; a project can now use its own parser engine. -The actions go into a separate file called NAME.act, in the form of -a switch statement body. - -* Changes in version 1.23: - -The user can define YYPARSE_PARAM as the name of an argument to be -passed into yyparse. The argument should have type void *. It should -actually point to an object. Grammar actions can access the variable -by casting it to the proper pointer type. - -Line numbers in output file corrected. - -* Changes in version 1.22: - ---help option added. - -* Changes in version 1.20: - -Output file does not redefine const for C++. - -Local Variables: -mode: outline -End: - ------ - -Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, -2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. - -This file is part of Bison, the GNU Compiler Compiler. - -This program is free software: you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation, either version 3 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program. If not, see <http://www.gnu.org/licenses/>. diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/README b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/README deleted file mode 100644 index 498671f0..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/README +++ /dev/null @@ -1,43 +0,0 @@ -This package contains the GNU Bison parser generator. - -See the file INSTALL for generic compilation and installation instructions. - -See the section FAQ in the documentation (doc/bison.info) for -frequently asked questions. The documentation is also available in -PDF and HTML, provided you have a recent version of Texinfo installed: -run "make pdf" or "make html". - -Bison requires GNU m4 1.4.6 or later. See: - -ftp://ftp.gnu.org/gnu/m4/m4-1.4.6.tar.gz - -Bison can work with pre-1.4.6 distributions of GNU m4 if they are -sufficiently patched, but if you encounter a bug with an older -distribution and report a bug we will probably suggest that you -upgrade to 1.4.6 as the first step in trying to fix it. - -Please send bug reports to <bug-bison@gnu.org>. Please include the -version number from `bison --version', and a complete, self-contained -test case in each bug report. - -If you have questions about using Bison and the documentation does -not answer them, please send mail to <help-bison@gnu.org>. - ------ - -Copyright (C) 1992, 1998, 1999, 2003, 2004, 2005, 2008 Free Software Foundation, Inc. - -This file is part of Bison, the GNU Compiler Compiler. - -This program is free software: you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation, either version 3 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program. If not, see <http://www.gnu.org/licenses/>. diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/README-alpha b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/README-alpha deleted file mode 100644 index 550ca327..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/README-alpha +++ /dev/null @@ -1,30 +0,0 @@ --*- text -*- - -This is a test release of this package. Using it more or less -implicitly signs you up to help us find whatever problems you report. - -The documentation still needs more work. Suggestions welcome. -Patches even more welcome. - -Please send comments and problem reports about this test release to -<bug-bison@gnu.org>. This program will get better only if you report -the problems you encounter. - ------ - -Copyright (C) 2002, 2004 Free Software Foundation, Inc. - -This file is part of GNU Bison. - -This program is free software: you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation, either version 3 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program. If not, see <http://www.gnu.org/licenses/>. diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/THANKS b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/THANKS deleted file mode 100644 index 40291c71..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/THANKS +++ /dev/null @@ -1,104 +0,0 @@ -Bison was originally written by Robert Corbett. It would not be what -it is today without the invaluable help of these people: - -Airy Andre Airy.Andre@edf.fr -Akim Demaille akim@freefriends.org -Albert Chin-A-Young china@thewrittenword.com -Alexander Belopolsky alexb@rentec.com -Alexandre Duret-Lutz adl@src.lip6.fr -Andreas Schwab schwab@suse.de -Andrew Suffield asuffield@users.sourceforge.net -Anthony Heading ajrh@ajrh.net -Arnold Robbins arnold@skeeve.com -Art Haas ahaas@neosoft.com -Baron Schwartz baron@sequent.org -Benoit Perrot benoit.perrot@epita.fr -Bert Deknuydt Bert.Deknuydt@esat.kuleuven.ac.be -Bob Rossi bob@brasko.net -Brandon Lucia blucia@gmail.com -Bruce Lilly blilly@erols.com -Bruno Haible bruno@clisp.org -Charles-Henri de Boysson de-boy_c@epita.fr -Christian Burger cburger@sunysb.edu -Cris Bailiff c.bailiff+bison@awayweb.com -Cris van Pelt cris@amf03054.office.wxs.nl -Csaba Raduly csaba_22@yahoo.co.uk -Daniel Hagerty hag@gnu.org -David J. MacKenzie djm@gnu.org -Derek M. Jones derek@knosof.co.uk -Di-an Jan dianj@freeshell.org -Dick Streefland dick.streefland@altium.nl -Enrico Scholz enrico.scholz@informatik.tu-chemnitz.de -Eric Blake ebb9@byu.net -Evgeny Stambulchik fnevgeny@plasma-gate.weizmann.ac.il -Fabrice Bauzac noon@cote-dazur.com -Florian Krohm florian@edamail.fishkill.ibm.com -Frank Heckenbach frank@g-n-u.de -Frans Englich frans.englich@telia.com -Georg Sauthoff gsauthof@TechFak.Uni-Bielefeld.DE -Goran Uddeborg goeran@uddeborg.se -Guido Trentalancia trentalg@aston.ac.uk -H. Merijn Brand h.m.brand@hccnet.nl -Hans Aberg haberg@matematik.su.se -Jan Nieuwenhuizen janneke@gnu.org -Jesse Thilo jthilo@gnu.org -Jim Kent jkent@arch.sel.sony.com -Jim Meyering jim@meyering.net -Joel E. Denny jdenny@ces.clemson.edu -Juan Manuel Guerrero juan.guerrero@gmx.de -Kees Zeelenberg kzlg@users.sourceforge.net -Keith Browne kbrowne@legato.com -Laurent Mascherpa laurent.mascherpa@epita.fr -Magnus Fromreide magfr@lysator.liu.se -Marc Autret autret_m@epita.fr -Martin Mokrejs mmokrejs@natur.cuni.cz -Martin Nylin martin.nylin@linuxmail.org -Matt Kraai kraai@alumni.cmu.edu -Matt Rosing rosing@peakfive.com -Michael Hayes m.hayes@elec.canterbury.ac.nz -Mickael Labau labau_m@epita.fr -Mike Castle dalgoda@ix.netcom.com -Neil Booth NeilB@earthling.net -Nelson H. F. Beebe beebe@math.utah.edu -Nicolas Burrus nicolas.burrus@epita.fr -Nicolas Tisserand nicolas.tisserand@epita.fr -Noah Friedman friedman@gnu.org -Oleg Smolsky oleg.smolsky@pacific-simulators.co.nz -Paolo Bonzini bonzini@gnu.org -Pascal Bart pascal.bart@epita.fr -Paul Eggert eggert@cs.ucla.edu -Paul Hilfinger Hilfinger@CS.Berkeley.EDU -Per Allansson per@appgate.com -Peter Fales psfales@lucent.com -Peter Hamorsky hamo@upjs.sk -Piotr Gackiewicz gacek@intertel.com.pl -Quoc Peyrot chojin@lrde.epita.fr -R Blake blakers@mac.com -Raja R Harinath harinath@cs.umn.edu -Richard Stallman rms@gnu.org -Robert Anisko anisko_r@epita.fr -Satya Kiran Popuri satyakiran@gmail.com -Sebastien Fricker sebastien.fricker@gmail.com -Sebastian Setzer sebastian.setzer.ext@siemens.com -Sergei Steshenko sergstesh@yahoo.com -Shura debil_urod@ngs.ru -Steve Murphy murf@parsetree.com -Tim Josling tej@melbpc.org.au -Tim Van Holder tim.van.holder@pandora.be -Tom Lane tgl@sss.pgh.pa.us -Tom Tromey tromey@cygnus.com -Tommy Nordgren tommy.nordgren@chello.se -Troy A. Johnson troyj@ecn.purdue.edu -Tys Lefering twlevo@xs4all.nl -Vin Shelton acs@alumni.princeton.edu -Wayne Green wayne@infosavvy.com -Wolfram Wagner ww@mpi-sb.mpg.de -Wwp subscript@free.fr -Zack Weinberg zack@codesourcery.com - -Many people are not named here because we lost track of them. We -thank them! Please, help us keeping this list up to date. - -Local Variables: -mode: text -End: diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/TODO b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/TODO deleted file mode 100644 index b2bca354..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/TODO +++ /dev/null @@ -1,309 +0,0 @@ --*- outline -*- - -* Header guards - -From Franc,ois: should we keep the directory part in the CPP guard? - - -* Yacc.c: CPP Macros - -Do some people use YYPURE, YYLSP_NEEDED like we do in the test suite? -They should not: it is not documented. But if they need to, let's -find something clean (not like YYLSP_NEEDED...). - - -* Installation - -* Documentation -Before releasing, make sure the documentation ("Understanding your -parser") refers to the current `output' format. - -* lalr1.cc -** vector -Move to using vector, drop stack.hh. - -** I18n -Catch up with yacc.c. - -* Report - -** GLR -How would Paul like to display the conflicted actions? In particular, -what when two reductions are possible on a given lookahead token, but one is -part of $default. Should we make the two reductions explicit, or just -keep $default? See the following point. - -** Disabled Reductions -See `tests/conflicts.at (Defaulted Conflicted Reduction)', and decide -what we want to do. - -** Documentation -Extend with error productions. The hard part will probably be finding -the right rule so that a single state does not exhibit too many yet -undocumented ``features''. Maybe an empty action ought to be -presented too. Shall we try to make a single grammar with all these -features, or should we have several very small grammars? - -** --report=conflict-path -Provide better assistance for understanding the conflicts by providing -a sample text exhibiting the (LALR) ambiguity. See the paper from -DeRemer and Penello: they already provide the algorithm. - -** Statically check for potential ambiguities in GLR grammars. See -<http://www.i3s.unice.fr/~schmitz/papers.html#expamb> for an approach. - - -* Extensions - -** Labeling the symbols -Have a look at the Lemon parser generator: instead of $1, $2 etc. they -can name the values. This is much more pleasant. For instance: - - exp (res): exp (a) '+' exp (b) { $res = $a + $b; }; - -I love this. I have been bitten too often by the removal of the -symbol, and forgetting to shift all the $n to $n-1. If you are -unlucky, it compiles... - -But instead of using $a etc., we can use regular variables. And -instead of using (), I propose to use `:' (again). Paul suggests -supporting `->' in addition to `:' to separate LHS and RHS. In other -words: - - r:exp -> a:exp '+' b:exp { r = a + b; }; - -That requires an significant improvement of the grammar parser. Using -GLR would be nice. It also requires that Bison know the type of the -symbols (which will be useful for %include anyway). So we have some -time before... - -Note that there remains the problem of locations: `@r'? - - -** $-1 -We should find a means to provide an access to values deep in the -stack. For instance, instead of - - baz: qux { $$ = $<foo>-1 + $<bar>0 + $1; } - -we should be able to have: - - foo($foo) bar($bar) baz($bar): qux($qux) { $baz = $foo + $bar + $qux; } - -Or something like this. - -** %if and the like -It should be possible to have %if/%else/%endif. The implementation is -not clear: should it be lexical or syntactic. Vadim Maslow thinks it -must be in the scanner: we must not parse what is in a switched off -part of %if. Akim Demaille thinks it should be in the parser, so as -to avoid falling into another CPP mistake. - -** -D, --define-muscle NAME=VALUE -To define muscles via cli. Or maybe support directly NAME=VALUE? - -** XML Output -There are couple of available extensions of Bison targeting some XML -output. Some day we should consider including them. One issue is -that they seem to be quite orthogonal to the parsing technique, and -seem to depend mostly on the possibility to have some code triggered -for each reduction. As a matter of fact, such hooks could also be -used to generate the yydebug traces. Some generic scheme probably -exists in there. - -XML output for GNU Bison and gcc - http://www.cs.may.ie/~jpower/Research/bisonXML/ - -XML output for GNU Bison - http://yaxx.sourceforge.net/ - -* Unit rules -Maybe we could expand unit rules, i.e., transform - - exp: arith | bool; - arith: exp '+' exp; - bool: exp '&' exp; - -into - - exp: exp '+' exp | exp '&' exp; - -when there are no actions. This can significantly speed up some -grammars. I can't find the papers. In particular the book `LR -parsing: Theory and Practice' is impossible to find, but according to -`Parsing Techniques: a Practical Guide', it includes information about -this issue. Does anybody have it? - - - -* Documentation - -** History/Bibliography -Some history of Bison and some bibliography would be most welcome. -Are there any Texinfo standards for bibliography? - - - -* Java, Fortran, etc. - - -* Coding system independence -Paul notes: - - Currently Bison assumes 8-bit bytes (i.e. that UCHAR_MAX is - 255). It also assumes that the 8-bit character encoding is - the same for the invocation of 'bison' as it is for the - invocation of 'cc', but this is not necessarily true when - people run bison on an ASCII host and then use cc on an EBCDIC - host. I don't think these topics are worth our time - addressing (unless we find a gung-ho volunteer for EBCDIC or - PDP-10 ports :-) but they should probably be documented - somewhere. - - More importantly, Bison does not currently allow NUL bytes in - tokens, either via escapes (e.g., "x\0y") or via a NUL byte in - the source code. This should get fixed. - -* --graph -Show reductions. - -* Broken options ? -** %token-table -** Skeleton strategy -Must we keep %token-table? - -* src/print_graph.c -Find the best graph parameters. - -* BTYacc -See if we can integrate backtracking in Bison. Charles-Henri de -Boysson <de-boy_c@epita.fr> is working on this, and already has some -results. Vadim Maslow, the maintainer of BTYacc was contacted, and we -stay in touch with him. Adjusting the Bison grammar parser will be -needed to support some extra BTYacc features. This is less urgent. - -** Keeping the conflicted actions -First, analyze the differences between byacc and btyacc (I'm referring -to the executables). Find where the conflicts are preserved. - -** Compare with the GLR tables -See how isomorphic the way BTYacc and the way the GLR adjustments in -Bison are compatible. *As much as possible* one should try to use the -same implementation in the Bison executables. I insist: it should be -very feasible to use the very same conflict tables. - -** Adjust the skeletons -Import the skeletons for C and C++. - -** Improve the skeletons -Have them support yysymprint, yydestruct and so forth. - - -* Precedence - -** Partial order -It is unfortunate that there is a total order for precedence. It -makes it impossible to have modular precedence information. We should -move to partial orders (sounds like series/parallel orders to me). - -** Correlation b/w precedence and associativity -Also, I fail to understand why we have to assign the same -associativity to operators with the same precedence. For instance, -why can't I decide that the precedence of * and / is the same, but the -latter is nonassoc? - -If there is really no profound motivation, we should find a new syntax -to allow specifying this. - -** RR conflicts -See if we can use precedence between rules to solve RR conflicts. See -what POSIX says. - - -* $undefined -From Hans: -- If the Bison generated parser experiences an undefined number in the -character range, that character is written out in diagnostic messages, an -addition to the $undefined value. - -Suggest: Change the name $undefined to undefined; looks better in outputs. - - -* Default Action -From Hans: -- For use with my C++ parser, I transported the "switch (yyn)" statement -that Bison writes to the bison.simple skeleton file. This way, I can remove -the current default rule $$ = $1 implementation, which causes a double -assignment to $$ which may not be OK under C++, replacing it with a -"default:" part within the switch statement. - -Note that the default rule $$ = $1, when typed, is perfectly OK under C, -but in the C++ implementation I made, this rule is different from -$<type_name>$ = $<type_name>1. I therefore think that one should implement -a Bison option where every typed default rule is explicitly written out -(same typed ruled can of course be grouped together). - -Note: Robert Anisko handles this. He knows how to do it. - - -* Warnings -It would be nice to have warning support. See how Autoconf handles -them, it is fairly well described there. It would be very nice to -implement this in such a way that other programs could use -lib/warnings.[ch]. - -Don't work on this without first announcing you do, as I already have -thought about it, and know many of the components that can be used to -implement it. - - -* Pre and post actions. -From: Florian Krohm <florian@edamail.fishkill.ibm.com> -Subject: YYACT_EPILOGUE -To: bug-bison@gnu.org -X-Sent: 1 week, 4 days, 14 hours, 38 minutes, 11 seconds ago - -The other day I had the need for explicitly building the parse tree. I -used %locations for that and defined YYLLOC_DEFAULT to call a function -that returns the tree node for the production. Easy. But I also needed -to assign the S-attribute to the tree node. That cannot be done in -YYLLOC_DEFAULT, because it is invoked before the action is executed. -The way I solved this was to define a macro YYACT_EPILOGUE that would -be invoked after the action. For reasons of symmetry I also added -YYACT_PROLOGUE. Although I had no use for that I can envision how it -might come in handy for debugging purposes. -All is needed is to add - -#if YYLSP_NEEDED - YYACT_EPILOGUE (yyval, (yyvsp - yylen), yylen, yyloc, (yylsp - yylen)); -#else - YYACT_EPILOGUE (yyval, (yyvsp - yylen), yylen); -#endif - -at the proper place to bison.simple. Ditto for YYACT_PROLOGUE. - -I was wondering what you think about adding YYACT_PROLOGUE/EPILOGUE -to bison. If you're interested, I'll work on a patch. - -* Better graphics -Equip the parser with a means to create the (visual) parse tree. - ------ - -Copyright (C) 2001, 2002, 2003, 2004, 2006 Free Software Foundation, -Inc. - -This file is part of Bison, the GNU Compiler Compiler. - -This program is free software: you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation, either version 3 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program. If not, see <http://www.gnu.org/licenses/>. diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/data/README b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/data/README deleted file mode 100644 index 18e025c1..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/data/README +++ /dev/null @@ -1,70 +0,0 @@ --*- outline -*- - -This directory contains data needed by Bison. - -* Skeletons -Bison skeletons: the general shapes of the different parser kinds, -that are specialized for specific grammars by the bison program. - -Currently, the supported skeletons are: - -- yacc.c - It used to be named bison.simple: it corresponds to C Yacc - compatible LALR(1) parsers. - -- lalr1.cc - Produces a C++ parser class. - -- lalr1.java - Produces a Java parser class. - -- glr.c - A Generalized LR C parser based on Bison's LALR(1) tables. - -- glr.cc - A Generalized LR C++ parser. Actually a C++ wrapper around glr.c. - -These skeletons are the only ones supported by the Bison team. -Because the interface between skeletons and the bison program is not -finished, *we are not bound to it*. In particular, Bison is not -mature enough for us to consider that ``foreign skeletons'' are -supported. - -* m4sugar -This directory contains M4sugar, sort of an extended library for M4, -which is used by Bison to instantiate the skeletons. - -* xslt -This directory contains XSLT programs that transform Bison's XML output -into various formats. - -- bison.xsl - A library of routines used by the other XSLT programs. - -- xml2dot.xsl - Conversion into GraphViz's dot format. - -- xml2text.xsl - Conversion into text. - -- xml2xhtml.xsl - Conversion into XHTML. - ------ - -Copyright (C) 2002, 2008 Free Software Foundation, Inc. - -This file is part of GNU Bison. - -This program is free software: you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation, either version 3 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program. If not, see <http://www.gnu.org/licenses/>. diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/djgpp/README.in b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/djgpp/README.in deleted file mode 100644 index d559a096..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/djgpp/README.in +++ /dev/null @@ -1,195 +0,0 @@ -This is a port of GNU Bison @VERSION@ to MSDOS/DJGPP. - -Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc. - -This program is free software: you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation, either version 3 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program. If not, see <http://www.gnu.org/licenses/>. - - -1.: DJGPP specific changes. - ======================= - - The DJGPP port of Bison offers LFN and SFN support depending on which - OS it is running. If LFN support is available or not is determinated at - run time. If LFN support is available (DOS session under Win9X, Win2K, - WinXP, etc.) the standard posix file name extensions will be used. - These are: y.tab.c, y.tab.c++, y.tab.h, y.output, etc. If only SFN - support is available (plain DOS), then the standard MSDOS short file - names will be used. These are: y_tab.c, y_tab.h, y.out, etc. - It should be noticed that this bison version needs the m4 program as - back end to generate the parser file (y.tab.c etc.) from the skeleton - files. This implies that m4 must always be installed to get bison - working. m4 will use a couple of m4 scripts that will be installed in - /dev/env/DJDIR/share/bison and shall not be removed. - It should also be noticed that the skeleton files bison.simple and - bison.hairy are no longer supported. This applies also to the environ- - ment variables BISON_HAIRY and BISON_SIMPLE. Those variables are *no* - longer honored at all. - The kind of skeleton file bison.hairy is no longer supported at all. - The skeleton file bison.simple is now called yacc.c and is an m4 script. - The other two skeleton files supported by this bison version are glr.c - and lalr1.cc. The first one is a generalized LR C parser based on - Bison's LALR(1) tables and the second one is a experimental C++ parser - class. - As has been told before, bison uses m4 to generate the parser file. - This is done by forking and using pipes for the IPC. MSDOS does not - support this functionality so this has been reproduced in the usual - way by redirecting stdin and stdout of bison and m4 to temporary files - and processing these files in sequence. - It should be noticed that due to the great amount of file names that do - not cleanly map to 8.3 file names, you will need an OS with LFN support - to configure and compile the sources. On Win98 this implies that the - generation of numeric tails for 8.3 file name aliases must be enabled - or the compilation will fail. - - - Please **read** the docs. - - -2.: Installing the binary package. - ============================== - -2.1.: Copy the binary distribution into the top DJGPP installation directory, - just unzip it preserving the directory structure running *ONE* of the - following commands: - unzip32 bsn@PACKAGE_VERSION@b.zip or - djtarx bsn@PACKAGE_VERSION@b.zip or - pkunzip -d bsn@PACKAGE_VERSION@b.zip - - - -3.: Building the binaries from sources. - =================================== - -3.1.: Create a temporary directory and copy the source package into the - directory. If you download the source distribution from one of the - DJGPP sites, just unzip it preserving the directory structure - running *ONE* of the following commands: - unzip32 bsn@PACKAGE_VERSION@s.zip or - djtarx bsn@PACKAGE_VERSION@s.zip or - pkunzip -d bsn@PACKAGE_VERSION@s.zip - and proceed to the paragraph 3.3, below. - -3.2.: Source distributions downloaded from one of the GNU FTP sites need - some more work to unpack, if LFN support is not available. If LFN is - available then you can extract the source files from the archive with - any unzip program and proceed to the paragraph 3.3, below. Any file - name issue will be handled by the the DJGPP configuration files. - To unpack the source distribution on SFN systems, first, you MUST use - the `djunpack' batch file to unzip the package. That is because some - file names in the official distributions need to be changed to avoid - problems on the various platforms supported by DJGPP. - `djunpack' invokes the `djtar' program (that is part of the basic DJGPP - development kit) to rename these files on the fly given a file with - name mappings; the distribution includes a file `djgpp/fnchange.lst' - with the necessary mappings. So you need first to retrieve that batch - file, and then invoke it to unpack the distribution. Here's how: - - djtar -x -p -o bison-@VERSION@/djgpp/djunpack.bat bison-@VERSION@.tar.gz > djunpack.bat - djunpack bison-@VERSION@.tar.gz - - (The name of the distribution archive and the leading directory of the - path to `djunpack.bat' in the distribution will be different for - versions of Bison other than @VERSION@.) - - If the argument to `djunpack.bat' include leading directories, it MUST - be given with the DOS-style backslashes; Unix-style forward slashes - will NOT work. - - If the distribution comes as a .tar.bz2 archive, and your version of - `djtar' doesn't support bzip2 decompression, you need to unpack it as - follows: - - bnzip2 bison-@VERSION@.tar.bz2 - djtar -x -p -o bison-@VERSION@/djgpp/djunpack.bat bison-@VERSION@.tar > djunpack.bat - djunpack bison-@VERSION@.tar - -3.3.: To build the binaries you will need the following binary packages: - djdev203.zip (or a later but NOT a prior version) - bsh204b.zip (or a later but NOT a prior version) - gccNNNb.zip, gppNNN.zip, bnuNNNb.zip, makNNNb.zip, filNNNb.zip, - perlNNNb.zip, shlNNNb.zip, txtNNNb.zip, txiNNNb.zip, grepNNNb.zip, - sedNNNb.zip and m4NNN.zip - - If you want to run the check you will need also: - difNNNb.zip - - NNN represents the latest version number of the binary packages. All - this packages can be found in the /v2gnu directory of any - ftp.delorie.com mirror. - You will need bsh204b.zip or later and *NOT* a prior version or - the build will fail. The same applies to djdev203.zip. Please note - that Bison requires m4-144b.zip or later to work properly. - -3.4.: If for some reason you want to reconfigure the package cd into the top - srcdir (bison-@TREE_VERSION@) and run the following commands: - del djgpp\config.cache - make clean - djgpp\config - - Please note that you *MUST* delete the config.cache file in the djgpp - subdir or you will not really reconfigure the sources because the - configuration informations will be read from the cache file instead - of being newly computed. - To build the programs in a directory other than where the sources are, - you must add the parameter that specifies the source directory, - e.g: - x:\src\gnu\bison-@TREE_VERSION@\djgpp\config x:/src/gnu/bison-@TREE_VERSION@ - - Lets assume you want to build the binaries in a directory placed on a - different drive (z:\build in this case) from where the sources are, - then you will run the following commands: - z: - md \build - cd \build - x:\src\gnu\bison-@TREE_VERSION@\djgpp\config x:/src/gnu/bison-@TREE_VERSION@ - - The order of the options and the srcdir option does not matter. You - *MUST* use forward slashes to specify the source directory. - - The batch file will set same environment variables, make MSDOS specific - modifications to the Makefile.in's and supply all other needed options - to the configure script. - -3.5.: To compile the package run from the top srcdir the command: - make - -3.6.: Now you can run the tests if you like. From the top srcdir run the - command: - make check - - No test should fail but the tests #131 (Doxygen Public Documentation) - and #132 (Doxygen Private Documentation) will be skipped. Please note - that the testsuite only works with LFN available. On plain DOS, most - of the tests will fail due to invalid DOS names. - -3.7.: To install the binaries, header, library, catalogs, and info docs - run the following command from the top srcdir: - make install - - This will install the products into your DJGPP installation tree given - by the default prefix "/dev/env/DJDIR". If you prefer to install them - into some other directory you will have to set prefix to the appropiate - value: - make install prefix=z:/some/other/place - - - - Send GNU bison specific bug reports to <bug-bison@gnu.org>. - Send suggestions and bug reports concerning the DJGPP port to - comp.os.msdos.djgpp or <djgpp@delorie.com>. - - -Enjoy. - - Guerrero, Juan Manuel <juan.guerrero@gmx.de> diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/doc/bison.info b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/doc/bison.info deleted file mode 100644 index 35f574f3..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/doc/bison.info +++ /dev/null @@ -1,11009 +0,0 @@ -This is ../../bison-2.4.1-src/doc/bison.info, produced by makeinfo -version 4.8 from ../../bison-2.4.1-src/doc/bison.texinfo. - - This manual (19 November 2008) is for GNU Bison (version 2.4.1), the -GNU parser generator. - - Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1995, 1998, 1999, -2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software -Foundation, Inc. - - Permission is granted to copy, distribute and/or modify this - document under the terms of the GNU Free Documentation License, - Version 1.2 or any later version published by the Free Software - Foundation; with no Invariant Sections, with the Front-Cover texts - being "A GNU Manual," and with the Back-Cover Texts as in (a) - below. A copy of the license is included in the section entitled - "GNU Free Documentation License." - - (a) The FSF's Back-Cover Text is: "You have the freedom to copy and - modify this GNU manual. Buying copies from the FSF supports it in - developing GNU and promoting software freedom." - -INFO-DIR-SECTION Software development -START-INFO-DIR-ENTRY -* bison: (bison). GNU parser generator (Yacc replacement). -END-INFO-DIR-ENTRY - - -File: bison.info, Node: Top, Next: Introduction, Up: (dir) - -Bison -***** - -This manual (19 November 2008) is for GNU Bison (version 2.4.1), the -GNU parser generator. - - Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1995, 1998, 1999, -2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software -Foundation, Inc. - - Permission is granted to copy, distribute and/or modify this - document under the terms of the GNU Free Documentation License, - Version 1.2 or any later version published by the Free Software - Foundation; with no Invariant Sections, with the Front-Cover texts - being "A GNU Manual," and with the Back-Cover Texts as in (a) - below. A copy of the license is included in the section entitled - "GNU Free Documentation License." - - (a) The FSF's Back-Cover Text is: "You have the freedom to copy and - modify this GNU manual. Buying copies from the FSF supports it in - developing GNU and promoting software freedom." - -* Menu: - -* Introduction:: -* Conditions:: -* Copying:: The GNU General Public License says - how you can copy and share Bison. - -Tutorial sections: -* Concepts:: Basic concepts for understanding Bison. -* Examples:: Three simple explained examples of using Bison. - -Reference sections: -* Grammar File:: Writing Bison declarations and rules. -* Interface:: C-language interface to the parser function `yyparse'. -* Algorithm:: How the Bison parser works at run-time. -* Error Recovery:: Writing rules for error recovery. -* Context Dependency:: What to do if your language syntax is too - messy for Bison to handle straightforwardly. -* Debugging:: Understanding or debugging Bison parsers. -* Invocation:: How to run Bison (to produce the parser source file). -* Other Languages:: Creating C++ and Java parsers. -* FAQ:: Frequently Asked Questions -* Table of Symbols:: All the keywords of the Bison language are explained. -* Glossary:: Basic concepts are explained. -* Copying This Manual:: License for copying this manual. -* Index:: Cross-references to the text. - - --- The Detailed Node Listing --- - -The Concepts of Bison - -* Language and Grammar:: Languages and context-free grammars, - as mathematical ideas. -* Grammar in Bison:: How we represent grammars for Bison's sake. -* Semantic Values:: Each token or syntactic grouping can have - a semantic value (the value of an integer, - the name of an identifier, etc.). -* Semantic Actions:: Each rule can have an action containing C code. -* GLR Parsers:: Writing parsers for general context-free languages. -* Locations Overview:: Tracking Locations. -* Bison Parser:: What are Bison's input and output, - how is the output used? -* Stages:: Stages in writing and running Bison grammars. -* Grammar Layout:: Overall structure of a Bison grammar file. - -Writing GLR Parsers - -* Simple GLR Parsers:: Using GLR parsers on unambiguous grammars. -* Merging GLR Parses:: Using GLR parsers to resolve ambiguities. -* GLR Semantic Actions:: Deferred semantic actions have special concerns. -* Compiler Requirements:: GLR parsers require a modern C compiler. - -Examples - -* RPN Calc:: Reverse polish notation calculator; - a first example with no operator precedence. -* Infix Calc:: Infix (algebraic) notation calculator. - Operator precedence is introduced. -* Simple Error Recovery:: Continuing after syntax errors. -* Location Tracking Calc:: Demonstrating the use of @N and @$. -* Multi-function Calc:: Calculator with memory and trig functions. - It uses multiple data-types for semantic values. -* Exercises:: Ideas for improving the multi-function calculator. - -Reverse Polish Notation Calculator - -* Rpcalc Declarations:: Prologue (declarations) for rpcalc. -* Rpcalc Rules:: Grammar Rules for rpcalc, with explanation. -* Rpcalc Lexer:: The lexical analyzer. -* Rpcalc Main:: The controlling function. -* Rpcalc Error:: The error reporting function. -* Rpcalc Generate:: Running Bison on the grammar file. -* Rpcalc Compile:: Run the C compiler on the output code. - -Grammar Rules for `rpcalc' - -* Rpcalc Input:: -* Rpcalc Line:: -* Rpcalc Expr:: - -Location Tracking Calculator: `ltcalc' - -* Ltcalc Declarations:: Bison and C declarations for ltcalc. -* Ltcalc Rules:: Grammar rules for ltcalc, with explanations. -* Ltcalc Lexer:: The lexical analyzer. - -Multi-Function Calculator: `mfcalc' - -* Mfcalc Declarations:: Bison declarations for multi-function calculator. -* Mfcalc Rules:: Grammar rules for the calculator. -* Mfcalc Symbol Table:: Symbol table management subroutines. - -Bison Grammar Files - -* Grammar Outline:: Overall layout of the grammar file. -* Symbols:: Terminal and nonterminal symbols. -* Rules:: How to write grammar rules. -* Recursion:: Writing recursive rules. -* Semantics:: Semantic values and actions. -* Locations:: Locations and actions. -* Declarations:: All kinds of Bison declarations are described here. -* Multiple Parsers:: Putting more than one Bison parser in one program. - -Outline of a Bison Grammar - -* Prologue:: Syntax and usage of the prologue. -* Prologue Alternatives:: Syntax and usage of alternatives to the prologue. -* Bison Declarations:: Syntax and usage of the Bison declarations section. -* Grammar Rules:: Syntax and usage of the grammar rules section. -* Epilogue:: Syntax and usage of the epilogue. - -Defining Language Semantics - -* Value Type:: Specifying one data type for all semantic values. -* Multiple Types:: Specifying several alternative data types. -* Actions:: An action is the semantic definition of a grammar rule. -* Action Types:: Specifying data types for actions to operate on. -* Mid-Rule Actions:: Most actions go at the end of a rule. - This says when, why and how to use the exceptional - action in the middle of a rule. - -Tracking Locations - -* Location Type:: Specifying a data type for locations. -* Actions and Locations:: Using locations in actions. -* Location Default Action:: Defining a general way to compute locations. - -Bison Declarations - -* Require Decl:: Requiring a Bison version. -* Token Decl:: Declaring terminal symbols. -* Precedence Decl:: Declaring terminals with precedence and associativity. -* Union Decl:: Declaring the set of all semantic value types. -* Type Decl:: Declaring the choice of type for a nonterminal symbol. -* Initial Action Decl:: Code run before parsing starts. -* Destructor Decl:: Declaring how symbols are freed. -* Expect Decl:: Suppressing warnings about parsing conflicts. -* Start Decl:: Specifying the start symbol. -* Pure Decl:: Requesting a reentrant parser. -* Push Decl:: Requesting a push parser. -* Decl Summary:: Table of all Bison declarations. - -Parser C-Language Interface - -* Parser Function:: How to call `yyparse' and what it returns. -* Push Parser Function:: How to call `yypush_parse' and what it returns. -* Pull Parser Function:: How to call `yypull_parse' and what it returns. -* Parser Create Function:: How to call `yypstate_new' and what it returns. -* Parser Delete Function:: How to call `yypstate_delete' and what it returns. -* Lexical:: You must supply a function `yylex' - which reads tokens. -* Error Reporting:: You must supply a function `yyerror'. -* Action Features:: Special features for use in actions. -* Internationalization:: How to let the parser speak in the user's - native language. - -The Lexical Analyzer Function `yylex' - -* Calling Convention:: How `yyparse' calls `yylex'. -* Token Values:: How `yylex' must return the semantic value - of the token it has read. -* Token Locations:: How `yylex' must return the text location - (line number, etc.) of the token, if the - actions want that. -* Pure Calling:: How the calling convention differs in a pure parser - (*note A Pure (Reentrant) Parser: Pure Decl.). - -The Bison Parser Algorithm - -* Lookahead:: Parser looks one token ahead when deciding what to do. -* Shift/Reduce:: Conflicts: when either shifting or reduction is valid. -* Precedence:: Operator precedence works by resolving conflicts. -* Contextual Precedence:: When an operator's precedence depends on context. -* Parser States:: The parser is a finite-state-machine with stack. -* Reduce/Reduce:: When two rules are applicable in the same situation. -* Mystery Conflicts:: Reduce/reduce conflicts that look unjustified. -* Generalized LR Parsing:: Parsing arbitrary context-free grammars. -* Memory Management:: What happens when memory is exhausted. How to avoid it. - -Operator Precedence - -* Why Precedence:: An example showing why precedence is needed. -* Using Precedence:: How to specify precedence in Bison grammars. -* Precedence Examples:: How these features are used in the previous example. -* How Precedence:: How they work. - -Handling Context Dependencies - -* Semantic Tokens:: Token parsing can depend on the semantic context. -* Lexical Tie-ins:: Token parsing can depend on the syntactic context. -* Tie-in Recovery:: Lexical tie-ins have implications for how - error recovery rules must be written. - -Debugging Your Parser - -* Understanding:: Understanding the structure of your parser. -* Tracing:: Tracing the execution of your parser. - -Invoking Bison - -* Bison Options:: All the options described in detail, - in alphabetical order by short options. -* Option Cross Key:: Alphabetical list of long options. -* Yacc Library:: Yacc-compatible `yylex' and `main'. - -Parsers Written In Other Languages - -* C++ Parsers:: The interface to generate C++ parser classes -* Java Parsers:: The interface to generate Java parser classes - -C++ Parsers - -* C++ Bison Interface:: Asking for C++ parser generation -* C++ Semantic Values:: %union vs. C++ -* C++ Location Values:: The position and location classes -* C++ Parser Interface:: Instantiating and running the parser -* C++ Scanner Interface:: Exchanges between yylex and parse -* A Complete C++ Example:: Demonstrating their use - -A Complete C++ Example - -* Calc++ --- C++ Calculator:: The specifications -* Calc++ Parsing Driver:: An active parsing context -* Calc++ Parser:: A parser class -* Calc++ Scanner:: A pure C++ Flex scanner -* Calc++ Top Level:: Conducting the band - -Java Parsers - -* Java Bison Interface:: Asking for Java parser generation -* Java Semantic Values:: %type and %token vs. Java -* Java Location Values:: The position and location classes -* Java Parser Interface:: Instantiating and running the parser -* Java Scanner Interface:: Specifying the scanner for the parser -* Java Action Features:: Special features for use in actions -* Java Differences:: Differences between C/C++ and Java Grammars -* Java Declarations Summary:: List of Bison declarations used with Java - -Frequently Asked Questions - -* Memory Exhausted:: Breaking the Stack Limits -* How Can I Reset the Parser:: `yyparse' Keeps some State -* Strings are Destroyed:: `yylval' Loses Track of Strings -* Implementing Gotos/Loops:: Control Flow in the Calculator -* Multiple start-symbols:: Factoring closely related grammars -* Secure? Conform?:: Is Bison POSIX safe? -* I can't build Bison:: Troubleshooting -* Where can I find help?:: Troubleshouting -* Bug Reports:: Troublereporting -* More Languages:: Parsers in C++, Java, and so on -* Beta Testing:: Experimenting development versions -* Mailing Lists:: Meeting other Bison users - -Copying This Manual - -* Copying This Manual:: License for copying this manual. - - -File: bison.info, Node: Introduction, Next: Conditions, Prev: Top, Up: Top - -Introduction -************ - -"Bison" is a general-purpose parser generator that converts an -annotated context-free grammar into an LALR(1) or GLR parser for that -grammar. Once you are proficient with Bison, you can use it to develop -a wide range of language parsers, from those used in simple desk -calculators to complex programming languages. - - Bison is upward compatible with Yacc: all properly-written Yacc -grammars ought to work with Bison with no change. Anyone familiar with -Yacc should be able to use Bison with little trouble. You need to be -fluent in C or C++ programming in order to use Bison or to understand -this manual. - - We begin with tutorial chapters that explain the basic concepts of -using Bison and show three explained examples, each building on the -last. If you don't know Bison or Yacc, start by reading these -chapters. Reference chapters follow which describe specific aspects of -Bison in detail. - - Bison was written primarily by Robert Corbett; Richard Stallman made -it Yacc-compatible. Wilfred Hansen of Carnegie Mellon University added -multi-character string literals and other features. - - This edition corresponds to version 2.4.1 of Bison. - - -File: bison.info, Node: Conditions, Next: Copying, Prev: Introduction, Up: Top - -Conditions for Using Bison -************************** - -The distribution terms for Bison-generated parsers permit using the -parsers in nonfree programs. Before Bison version 2.2, these extra -permissions applied only when Bison was generating LALR(1) parsers in -C. And before Bison version 1.24, Bison-generated parsers could be -used only in programs that were free software. - - The other GNU programming tools, such as the GNU C compiler, have -never had such a requirement. They could always be used for nonfree -software. The reason Bison was different was not due to a special -policy decision; it resulted from applying the usual General Public -License to all of the Bison source code. - - The output of the Bison utility--the Bison parser file--contains a -verbatim copy of a sizable piece of Bison, which is the code for the -parser's implementation. (The actions from your grammar are inserted -into this implementation at one point, but most of the rest of the -implementation is not changed.) When we applied the GPL terms to the -skeleton code for the parser's implementation, the effect was to -restrict the use of Bison output to free software. - - We didn't change the terms because of sympathy for people who want to -make software proprietary. *Software should be free.* But we -concluded that limiting Bison's use to free software was doing little to -encourage people to make other software free. So we decided to make the -practical conditions for using Bison match the practical conditions for -using the other GNU tools. - - This exception applies when Bison is generating code for a parser. -You can tell whether the exception applies to a Bison output file by -inspecting the file for text beginning with "As a special -exception...". The text spells out the exact terms of the exception. - - -File: bison.info, Node: Copying, Next: Concepts, Prev: Conditions, Up: Top - -GNU GENERAL PUBLIC LICENSE -************************** - - Version 3, 29 June 2007 - - Copyright (C) 2007 Free Software Foundation, Inc. `http://fsf.org/' - - Everyone is permitted to copy and distribute verbatim copies of this - license document, but changing it is not allowed. - -Preamble -======== - -The GNU General Public License is a free, copyleft license for software -and other kinds of works. - - The licenses for most software and other practical works are designed -to take away your freedom to share and change the works. By contrast, -the GNU General Public License is intended to guarantee your freedom to -share and change all versions of a program--to make sure it remains -free software for all its users. We, the Free Software Foundation, use -the GNU General Public License for most of our software; it applies -also to any other work released this way by its authors. You can apply -it to your programs, too. - - When we speak of free software, we are referring to freedom, not -price. Our General Public Licenses are designed to make sure that you -have the freedom to distribute copies of free software (and charge for -them if you wish), that you receive source code or can get it if you -want it, that you can change the software or use pieces of it in new -free programs, and that you know you can do these things. - - To protect your rights, we need to prevent others from denying you -these rights or asking you to surrender the rights. Therefore, you -have certain responsibilities if you distribute copies of the software, -or if you modify it: responsibilities to respect the freedom of others. - - For example, if you distribute copies of such a program, whether -gratis or for a fee, you must pass on to the recipients the same -freedoms that you received. You must make sure that they, too, receive -or can get the source code. And you must show them these terms so they -know their rights. - - Developers that use the GNU GPL protect your rights with two steps: -(1) assert copyright on the software, and (2) offer you this License -giving you legal permission to copy, distribute and/or modify it. - - For the developers' and authors' protection, the GPL clearly explains -that there is no warranty for this free software. For both users' and -authors' sake, the GPL requires that modified versions be marked as -changed, so that their problems will not be attributed erroneously to -authors of previous versions. - - Some devices are designed to deny users access to install or run -modified versions of the software inside them, although the -manufacturer can do so. This is fundamentally incompatible with the -aim of protecting users' freedom to change the software. The -systematic pattern of such abuse occurs in the area of products for -individuals to use, which is precisely where it is most unacceptable. -Therefore, we have designed this version of the GPL to prohibit the -practice for those products. If such problems arise substantially in -other domains, we stand ready to extend this provision to those domains -in future versions of the GPL, as needed to protect the freedom of -users. - - Finally, every program is threatened constantly by software patents. -States should not allow patents to restrict development and use of -software on general-purpose computers, but in those that do, we wish to -avoid the special danger that patents applied to a free program could -make it effectively proprietary. To prevent this, the GPL assures that -patents cannot be used to render the program non-free. - - The precise terms and conditions for copying, distribution and -modification follow. - -TERMS AND CONDITIONS -==================== - - 0. 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It is safest -to attach them to the start of each source file to most effectively -state the exclusion of warranty; and each file should have at least the -"copyright" line and a pointer to where the full notice is found. - - ONE LINE TO GIVE THE PROGRAM'S NAME AND A BRIEF IDEA OF WHAT IT DOES. - Copyright (C) YEAR NAME OF AUTHOR - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation, either version 3 of the License, or (at - your option) any later version. - - This program is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see `http://www.gnu.org/licenses/'. - - Also add information on how to contact you by electronic and paper -mail. - - If the program does terminal interaction, make it output a short -notice like this when it starts in an interactive mode: - - PROGRAM Copyright (C) YEAR NAME OF AUTHOR - This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. - This is free software, and you are welcome to redistribute it - under certain conditions; type `show c' for details. - - The hypothetical commands `show w' and `show c' should show the -appropriate parts of the General Public License. Of course, your -program's commands might be different; for a GUI interface, you would -use an "about box". - - You should also get your employer (if you work as a programmer) or -school, if any, to sign a "copyright disclaimer" for the program, if -necessary. For more information on this, and how to apply and follow -the GNU GPL, see `http://www.gnu.org/licenses/'. - - The GNU General Public License does not permit incorporating your -program into proprietary programs. If your program is a subroutine -library, you may consider it more useful to permit linking proprietary -applications with the library. If this is what you want to do, use the -GNU Lesser General Public License instead of this License. But first, -please read `http://www.gnu.org/philosophy/why-not-lgpl.html'. - - -File: bison.info, Node: Concepts, Next: Examples, Prev: Copying, Up: Top - -1 The Concepts of Bison -*********************** - -This chapter introduces many of the basic concepts without which the -details of Bison will not make sense. If you do not already know how to -use Bison or Yacc, we suggest you start by reading this chapter -carefully. - -* Menu: - -* Language and Grammar:: Languages and context-free grammars, - as mathematical ideas. -* Grammar in Bison:: How we represent grammars for Bison's sake. -* Semantic Values:: Each token or syntactic grouping can have - a semantic value (the value of an integer, - the name of an identifier, etc.). -* Semantic Actions:: Each rule can have an action containing C code. -* GLR Parsers:: Writing parsers for general context-free languages. -* Locations Overview:: Tracking Locations. -* Bison Parser:: What are Bison's input and output, - how is the output used? -* Stages:: Stages in writing and running Bison grammars. -* Grammar Layout:: Overall structure of a Bison grammar file. - - -File: bison.info, Node: Language and Grammar, Next: Grammar in Bison, Up: Concepts - -1.1 Languages and Context-Free Grammars -======================================= - -In order for Bison to parse a language, it must be described by a -"context-free grammar". This means that you specify one or more -"syntactic groupings" and give rules for constructing them from their -parts. For example, in the C language, one kind of grouping is called -an `expression'. One rule for making an expression might be, "An -expression can be made of a minus sign and another expression". -Another would be, "An expression can be an integer". As you can see, -rules are often recursive, but there must be at least one rule which -leads out of the recursion. - - The most common formal system for presenting such rules for humans -to read is "Backus-Naur Form" or "BNF", which was developed in order to -specify the language Algol 60. Any grammar expressed in BNF is a -context-free grammar. The input to Bison is essentially -machine-readable BNF. - - There are various important subclasses of context-free grammar. -Although it can handle almost all context-free grammars, Bison is -optimized for what are called LALR(1) grammars. In brief, in these -grammars, it must be possible to tell how to parse any portion of an -input string with just a single token of lookahead. Strictly speaking, -that is a description of an LR(1) grammar, and LALR(1) involves -additional restrictions that are hard to explain simply; but it is rare -in actual practice to find an LR(1) grammar that fails to be LALR(1). -*Note Mysterious Reduce/Reduce Conflicts: Mystery Conflicts, for more -information on this. - - Parsers for LALR(1) grammars are "deterministic", meaning roughly -that the next grammar rule to apply at any point in the input is -uniquely determined by the preceding input and a fixed, finite portion -(called a "lookahead") of the remaining input. A context-free grammar -can be "ambiguous", meaning that there are multiple ways to apply the -grammar rules to get the same inputs. Even unambiguous grammars can be -"nondeterministic", meaning that no fixed lookahead always suffices to -determine the next grammar rule to apply. With the proper -declarations, Bison is also able to parse these more general -context-free grammars, using a technique known as GLR parsing (for -Generalized LR). Bison's GLR parsers are able to handle any -context-free grammar for which the number of possible parses of any -given string is finite. - - In the formal grammatical rules for a language, each kind of -syntactic unit or grouping is named by a "symbol". Those which are -built by grouping smaller constructs according to grammatical rules are -called "nonterminal symbols"; those which can't be subdivided are called -"terminal symbols" or "token types". We call a piece of input -corresponding to a single terminal symbol a "token", and a piece -corresponding to a single nonterminal symbol a "grouping". - - We can use the C language as an example of what symbols, terminal and -nonterminal, mean. The tokens of C are identifiers, constants (numeric -and string), and the various keywords, arithmetic operators and -punctuation marks. So the terminal symbols of a grammar for C include -`identifier', `number', `string', plus one symbol for each keyword, -operator or punctuation mark: `if', `return', `const', `static', `int', -`char', `plus-sign', `open-brace', `close-brace', `comma' and many more. -(These tokens can be subdivided into characters, but that is a matter of -lexicography, not grammar.) - - Here is a simple C function subdivided into tokens: - - int /* keyword `int' */ - square (int x) /* identifier, open-paren, keyword `int', - identifier, close-paren */ - { /* open-brace */ - return x * x; /* keyword `return', identifier, asterisk, - identifier, semicolon */ - } /* close-brace */ - - The syntactic groupings of C include the expression, the statement, -the declaration, and the function definition. These are represented in -the grammar of C by nonterminal symbols `expression', `statement', -`declaration' and `function definition'. The full grammar uses dozens -of additional language constructs, each with its own nonterminal -symbol, in order to express the meanings of these four. The example -above is a function definition; it contains one declaration, and one -statement. In the statement, each `x' is an expression and so is `x * -x'. - - Each nonterminal symbol must have grammatical rules showing how it -is made out of simpler constructs. For example, one kind of C -statement is the `return' statement; this would be described with a -grammar rule which reads informally as follows: - - A `statement' can be made of a `return' keyword, an `expression' - and a `semicolon'. - -There would be many other rules for `statement', one for each kind of -statement in C. - - One nonterminal symbol must be distinguished as the special one which -defines a complete utterance in the language. It is called the "start -symbol". In a compiler, this means a complete input program. In the C -language, the nonterminal symbol `sequence of definitions and -declarations' plays this role. - - For example, `1 + 2' is a valid C expression--a valid part of a C -program--but it is not valid as an _entire_ C program. In the -context-free grammar of C, this follows from the fact that `expression' -is not the start symbol. - - The Bison parser reads a sequence of tokens as its input, and groups -the tokens using the grammar rules. If the input is valid, the end -result is that the entire token sequence reduces to a single grouping -whose symbol is the grammar's start symbol. If we use a grammar for C, -the entire input must be a `sequence of definitions and declarations'. -If not, the parser reports a syntax error. - - -File: bison.info, Node: Grammar in Bison, Next: Semantic Values, Prev: Language and Grammar, Up: Concepts - -1.2 From Formal Rules to Bison Input -==================================== - -A formal grammar is a mathematical construct. To define the language -for Bison, you must write a file expressing the grammar in Bison syntax: -a "Bison grammar" file. *Note Bison Grammar Files: Grammar File. - - A nonterminal symbol in the formal grammar is represented in Bison -input as an identifier, like an identifier in C. By convention, it -should be in lower case, such as `expr', `stmt' or `declaration'. - - The Bison representation for a terminal symbol is also called a -"token type". Token types as well can be represented as C-like -identifiers. By convention, these identifiers should be upper case to -distinguish them from nonterminals: for example, `INTEGER', -`IDENTIFIER', `IF' or `RETURN'. A terminal symbol that stands for a -particular keyword in the language should be named after that keyword -converted to upper case. The terminal symbol `error' is reserved for -error recovery. *Note Symbols::. - - A terminal symbol can also be represented as a character literal, -just like a C character constant. You should do this whenever a token -is just a single character (parenthesis, plus-sign, etc.): use that -same character in a literal as the terminal symbol for that token. - - A third way to represent a terminal symbol is with a C string -constant containing several characters. *Note Symbols::, for more -information. - - The grammar rules also have an expression in Bison syntax. For -example, here is the Bison rule for a C `return' statement. The -semicolon in quotes is a literal character token, representing part of -the C syntax for the statement; the naked semicolon, and the colon, are -Bison punctuation used in every rule. - - stmt: RETURN expr ';' - ; - -*Note Syntax of Grammar Rules: Rules. - - -File: bison.info, Node: Semantic Values, Next: Semantic Actions, Prev: Grammar in Bison, Up: Concepts - -1.3 Semantic Values -=================== - -A formal grammar selects tokens only by their classifications: for -example, if a rule mentions the terminal symbol `integer constant', it -means that _any_ integer constant is grammatically valid in that -position. The precise value of the constant is irrelevant to how to -parse the input: if `x+4' is grammatical then `x+1' or `x+3989' is -equally grammatical. - - But the precise value is very important for what the input means -once it is parsed. A compiler is useless if it fails to distinguish -between 4, 1 and 3989 as constants in the program! Therefore, each -token in a Bison grammar has both a token type and a "semantic value". -*Note Defining Language Semantics: Semantics, for details. - - The token type is a terminal symbol defined in the grammar, such as -`INTEGER', `IDENTIFIER' or `',''. It tells everything you need to know -to decide where the token may validly appear and how to group it with -other tokens. The grammar rules know nothing about tokens except their -types. - - The semantic value has all the rest of the information about the -meaning of the token, such as the value of an integer, or the name of an -identifier. (A token such as `','' which is just punctuation doesn't -need to have any semantic value.) - - For example, an input token might be classified as token type -`INTEGER' and have the semantic value 4. Another input token might -have the same token type `INTEGER' but value 3989. When a grammar rule -says that `INTEGER' is allowed, either of these tokens is acceptable -because each is an `INTEGER'. When the parser accepts the token, it -keeps track of the token's semantic value. - - Each grouping can also have a semantic value as well as its -nonterminal symbol. For example, in a calculator, an expression -typically has a semantic value that is a number. In a compiler for a -programming language, an expression typically has a semantic value that -is a tree structure describing the meaning of the expression. - - -File: bison.info, Node: Semantic Actions, Next: GLR Parsers, Prev: Semantic Values, Up: Concepts - -1.4 Semantic Actions -==================== - -In order to be useful, a program must do more than parse input; it must -also produce some output based on the input. In a Bison grammar, a -grammar rule can have an "action" made up of C statements. Each time -the parser recognizes a match for that rule, the action is executed. -*Note Actions::. - - Most of the time, the purpose of an action is to compute the -semantic value of the whole construct from the semantic values of its -parts. For example, suppose we have a rule which says an expression -can be the sum of two expressions. When the parser recognizes such a -sum, each of the subexpressions has a semantic value which describes -how it was built up. The action for this rule should create a similar -sort of value for the newly recognized larger expression. - - For example, here is a rule that says an expression can be the sum of -two subexpressions: - - expr: expr '+' expr { $$ = $1 + $3; } - ; - -The action says how to produce the semantic value of the sum expression -from the values of the two subexpressions. - - -File: bison.info, Node: GLR Parsers, Next: Locations Overview, Prev: Semantic Actions, Up: Concepts - -1.5 Writing GLR Parsers -======================= - -In some grammars, Bison's standard LALR(1) parsing algorithm cannot -decide whether to apply a certain grammar rule at a given point. That -is, it may not be able to decide (on the basis of the input read so -far) which of two possible reductions (applications of a grammar rule) -applies, or whether to apply a reduction or read more of the input and -apply a reduction later in the input. These are known respectively as -"reduce/reduce" conflicts (*note Reduce/Reduce::), and "shift/reduce" -conflicts (*note Shift/Reduce::). - - To use a grammar that is not easily modified to be LALR(1), a more -general parsing algorithm is sometimes necessary. If you include -`%glr-parser' among the Bison declarations in your file (*note Grammar -Outline::), the result is a Generalized LR (GLR) parser. These parsers -handle Bison grammars that contain no unresolved conflicts (i.e., after -applying precedence declarations) identically to LALR(1) parsers. -However, when faced with unresolved shift/reduce and reduce/reduce -conflicts, GLR parsers use the simple expedient of doing both, -effectively cloning the parser to follow both possibilities. Each of -the resulting parsers can again split, so that at any given time, there -can be any number of possible parses being explored. The parsers -proceed in lockstep; that is, all of them consume (shift) a given input -symbol before any of them proceed to the next. Each of the cloned -parsers eventually meets one of two possible fates: either it runs into -a parsing error, in which case it simply vanishes, or it merges with -another parser, because the two of them have reduced the input to an -identical set of symbols. - - During the time that there are multiple parsers, semantic actions are -recorded, but not performed. When a parser disappears, its recorded -semantic actions disappear as well, and are never performed. When a -reduction makes two parsers identical, causing them to merge, Bison -records both sets of semantic actions. Whenever the last two parsers -merge, reverting to the single-parser case, Bison resolves all the -outstanding actions either by precedences given to the grammar rules -involved, or by performing both actions, and then calling a designated -user-defined function on the resulting values to produce an arbitrary -merged result. - -* Menu: - -* Simple GLR Parsers:: Using GLR parsers on unambiguous grammars. -* Merging GLR Parses:: Using GLR parsers to resolve ambiguities. -* GLR Semantic Actions:: Deferred semantic actions have special concerns. -* Compiler Requirements:: GLR parsers require a modern C compiler. - - -File: bison.info, Node: Simple GLR Parsers, Next: Merging GLR Parses, Up: GLR Parsers - -1.5.1 Using GLR on Unambiguous Grammars ---------------------------------------- - -In the simplest cases, you can use the GLR algorithm to parse grammars -that are unambiguous, but fail to be LALR(1). Such grammars typically -require more than one symbol of lookahead, or (in rare cases) fall into -the category of grammars in which the LALR(1) algorithm throws away too -much information (they are in LR(1), but not LALR(1), *Note Mystery -Conflicts::). - - Consider a problem that arises in the declaration of enumerated and -subrange types in the programming language Pascal. Here are some -examples: - - type subrange = lo .. hi; - type enum = (a, b, c); - -The original language standard allows only numeric literals and -constant identifiers for the subrange bounds (`lo' and `hi'), but -Extended Pascal (ISO/IEC 10206) and many other Pascal implementations -allow arbitrary expressions there. This gives rise to the following -situation, containing a superfluous pair of parentheses: - - type subrange = (a) .. b; - -Compare this to the following declaration of an enumerated type with -only one value: - - type enum = (a); - -(These declarations are contrived, but they are syntactically valid, -and more-complicated cases can come up in practical programs.) - - These two declarations look identical until the `..' token. With -normal LALR(1) one-token lookahead it is not possible to decide between -the two forms when the identifier `a' is parsed. It is, however, -desirable for a parser to decide this, since in the latter case `a' -must become a new identifier to represent the enumeration value, while -in the former case `a' must be evaluated with its current meaning, -which may be a constant or even a function call. - - You could parse `(a)' as an "unspecified identifier in parentheses", -to be resolved later, but this typically requires substantial -contortions in both semantic actions and large parts of the grammar, -where the parentheses are nested in the recursive rules for expressions. - - You might think of using the lexer to distinguish between the two -forms by returning different tokens for currently defined and undefined -identifiers. But if these declarations occur in a local scope, and `a' -is defined in an outer scope, then both forms are possible--either -locally redefining `a', or using the value of `a' from the outer scope. -So this approach cannot work. - - A simple solution to this problem is to declare the parser to use -the GLR algorithm. When the GLR parser reaches the critical state, it -merely splits into two branches and pursues both syntax rules -simultaneously. Sooner or later, one of them runs into a parsing -error. If there is a `..' token before the next `;', the rule for -enumerated types fails since it cannot accept `..' anywhere; otherwise, -the subrange type rule fails since it requires a `..' token. So one of -the branches fails silently, and the other one continues normally, -performing all the intermediate actions that were postponed during the -split. - - If the input is syntactically incorrect, both branches fail and the -parser reports a syntax error as usual. - - The effect of all this is that the parser seems to "guess" the -correct branch to take, or in other words, it seems to use more -lookahead than the underlying LALR(1) algorithm actually allows for. -In this example, LALR(2) would suffice, but also some cases that are -not LALR(k) for any k can be handled this way. - - In general, a GLR parser can take quadratic or cubic worst-case time, -and the current Bison parser even takes exponential time and space for -some grammars. In practice, this rarely happens, and for many grammars -it is possible to prove that it cannot happen. The present example -contains only one conflict between two rules, and the type-declaration -context containing the conflict cannot be nested. So the number of -branches that can exist at any time is limited by the constant 2, and -the parsing time is still linear. - - Here is a Bison grammar corresponding to the example above. It -parses a vastly simplified form of Pascal type declarations. - - %token TYPE DOTDOT ID - - %left '+' '-' - %left '*' '/' - - %% - - type_decl : TYPE ID '=' type ';' - ; - - type : '(' id_list ')' - | expr DOTDOT expr - ; - - id_list : ID - | id_list ',' ID - ; - - expr : '(' expr ')' - | expr '+' expr - | expr '-' expr - | expr '*' expr - | expr '/' expr - | ID - ; - - When used as a normal LALR(1) grammar, Bison correctly complains -about one reduce/reduce conflict. In the conflicting situation the -parser chooses one of the alternatives, arbitrarily the one declared -first. Therefore the following correct input is not recognized: - - type t = (a) .. b; - - The parser can be turned into a GLR parser, while also telling Bison -to be silent about the one known reduce/reduce conflict, by adding -these two declarations to the Bison input file (before the first `%%'): - - %glr-parser - %expect-rr 1 - -No change in the grammar itself is required. Now the parser recognizes -all valid declarations, according to the limited syntax above, -transparently. In fact, the user does not even notice when the parser -splits. - - So here we have a case where we can use the benefits of GLR, almost -without disadvantages. Even in simple cases like this, however, there -are at least two potential problems to beware. First, always analyze -the conflicts reported by Bison to make sure that GLR splitting is only -done where it is intended. A GLR parser splitting inadvertently may -cause problems less obvious than an LALR parser statically choosing the -wrong alternative in a conflict. Second, consider interactions with -the lexer (*note Semantic Tokens::) with great care. Since a split -parser consumes tokens without performing any actions during the split, -the lexer cannot obtain information via parser actions. Some cases of -lexer interactions can be eliminated by using GLR to shift the -complications from the lexer to the parser. You must check the -remaining cases for correctness. - - In our example, it would be safe for the lexer to return tokens -based on their current meanings in some symbol table, because no new -symbols are defined in the middle of a type declaration. Though it is -possible for a parser to define the enumeration constants as they are -parsed, before the type declaration is completed, it actually makes no -difference since they cannot be used within the same enumerated type -declaration. - - -File: bison.info, Node: Merging GLR Parses, Next: GLR Semantic Actions, Prev: Simple GLR Parsers, Up: GLR Parsers - -1.5.2 Using GLR to Resolve Ambiguities --------------------------------------- - -Let's consider an example, vastly simplified from a C++ grammar. - - %{ - #include <stdio.h> - #define YYSTYPE char const * - int yylex (void); - void yyerror (char const *); - %} - - %token TYPENAME ID - - %right '=' - %left '+' - - %glr-parser - - %% - - prog : - | prog stmt { printf ("\n"); } - ; - - stmt : expr ';' %dprec 1 - | decl %dprec 2 - ; - - expr : ID { printf ("%s ", $$); } - | TYPENAME '(' expr ')' - { printf ("%s <cast> ", $1); } - | expr '+' expr { printf ("+ "); } - | expr '=' expr { printf ("= "); } - ; - - decl : TYPENAME declarator ';' - { printf ("%s <declare> ", $1); } - | TYPENAME declarator '=' expr ';' - { printf ("%s <init-declare> ", $1); } - ; - - declarator : ID { printf ("\"%s\" ", $1); } - | '(' declarator ')' - ; - -This models a problematic part of the C++ grammar--the ambiguity between -certain declarations and statements. For example, - - T (x) = y+z; - -parses as either an `expr' or a `stmt' (assuming that `T' is recognized -as a `TYPENAME' and `x' as an `ID'). Bison detects this as a -reduce/reduce conflict between the rules `expr : ID' and `declarator : -ID', which it cannot resolve at the time it encounters `x' in the -example above. Since this is a GLR parser, it therefore splits the -problem into two parses, one for each choice of resolving the -reduce/reduce conflict. Unlike the example from the previous section -(*note Simple GLR Parsers::), however, neither of these parses "dies," -because the grammar as it stands is ambiguous. One of the parsers -eventually reduces `stmt : expr ';'' and the other reduces `stmt : -decl', after which both parsers are in an identical state: they've seen -`prog stmt' and have the same unprocessed input remaining. We say that -these parses have "merged." - - At this point, the GLR parser requires a specification in the -grammar of how to choose between the competing parses. In the example -above, the two `%dprec' declarations specify that Bison is to give -precedence to the parse that interprets the example as a `decl', which -implies that `x' is a declarator. The parser therefore prints - - "x" y z + T <init-declare> - - The `%dprec' declarations only come into play when more than one -parse survives. Consider a different input string for this parser: - - T (x) + y; - -This is another example of using GLR to parse an unambiguous construct, -as shown in the previous section (*note Simple GLR Parsers::). Here, -there is no ambiguity (this cannot be parsed as a declaration). -However, at the time the Bison parser encounters `x', it does not have -enough information to resolve the reduce/reduce conflict (again, -between `x' as an `expr' or a `declarator'). In this case, no -precedence declaration is used. Again, the parser splits into two, one -assuming that `x' is an `expr', and the other assuming `x' is a -`declarator'. The second of these parsers then vanishes when it sees -`+', and the parser prints - - x T <cast> y + - - Suppose that instead of resolving the ambiguity, you wanted to see -all the possibilities. For this purpose, you must merge the semantic -actions of the two possible parsers, rather than choosing one over the -other. To do so, you could change the declaration of `stmt' as follows: - - stmt : expr ';' %merge <stmtMerge> - | decl %merge <stmtMerge> - ; - -and define the `stmtMerge' function as: - - static YYSTYPE - stmtMerge (YYSTYPE x0, YYSTYPE x1) - { - printf ("<OR> "); - return ""; - } - -with an accompanying forward declaration in the C declarations at the -beginning of the file: - - %{ - #define YYSTYPE char const * - static YYSTYPE stmtMerge (YYSTYPE x0, YYSTYPE x1); - %} - -With these declarations, the resulting parser parses the first example -as both an `expr' and a `decl', and prints - - "x" y z + T <init-declare> x T <cast> y z + = <OR> - - Bison requires that all of the productions that participate in any -particular merge have identical `%merge' clauses. Otherwise, the -ambiguity would be unresolvable, and the parser will report an error -during any parse that results in the offending merge. - - -File: bison.info, Node: GLR Semantic Actions, Next: Compiler Requirements, Prev: Merging GLR Parses, Up: GLR Parsers - -1.5.3 GLR Semantic Actions --------------------------- - -By definition, a deferred semantic action is not performed at the same -time as the associated reduction. This raises caveats for several -Bison features you might use in a semantic action in a GLR parser. - - In any semantic action, you can examine `yychar' to determine the -type of the lookahead token present at the time of the associated -reduction. After checking that `yychar' is not set to `YYEMPTY' or -`YYEOF', you can then examine `yylval' and `yylloc' to determine the -lookahead token's semantic value and location, if any. In a -nondeferred semantic action, you can also modify any of these variables -to influence syntax analysis. *Note Lookahead Tokens: Lookahead. - - In a deferred semantic action, it's too late to influence syntax -analysis. In this case, `yychar', `yylval', and `yylloc' are set to -shallow copies of the values they had at the time of the associated -reduction. For this reason alone, modifying them is dangerous. -Moreover, the result of modifying them is undefined and subject to -change with future versions of Bison. For example, if a semantic -action might be deferred, you should never write it to invoke -`yyclearin' (*note Action Features::) or to attempt to free memory -referenced by `yylval'. - - Another Bison feature requiring special consideration is `YYERROR' -(*note Action Features::), which you can invoke in a semantic action to -initiate error recovery. During deterministic GLR operation, the -effect of `YYERROR' is the same as its effect in an LALR(1) parser. In -a deferred semantic action, its effect is undefined. - - Also, see *Note Default Action for Locations: Location Default -Action, which describes a special usage of `YYLLOC_DEFAULT' in GLR -parsers. - - -File: bison.info, Node: Compiler Requirements, Prev: GLR Semantic Actions, Up: GLR Parsers - -1.5.4 Considerations when Compiling GLR Parsers ------------------------------------------------ - -The GLR parsers require a compiler for ISO C89 or later. In addition, -they use the `inline' keyword, which is not C89, but is C99 and is a -common extension in pre-C99 compilers. It is up to the user of these -parsers to handle portability issues. For instance, if using Autoconf -and the Autoconf macro `AC_C_INLINE', a mere - - %{ - #include <config.h> - %} - -will suffice. Otherwise, we suggest - - %{ - #if __STDC_VERSION__ < 199901 && ! defined __GNUC__ && ! defined inline - #define inline - #endif - %} - - -File: bison.info, Node: Locations Overview, Next: Bison Parser, Prev: GLR Parsers, Up: Concepts - -1.6 Locations -============= - -Many applications, like interpreters or compilers, have to produce -verbose and useful error messages. To achieve this, one must be able -to keep track of the "textual location", or "location", of each -syntactic construct. Bison provides a mechanism for handling these -locations. - - Each token has a semantic value. In a similar fashion, each token -has an associated location, but the type of locations is the same for -all tokens and groupings. Moreover, the output parser is equipped with -a default data structure for storing locations (*note Locations::, for -more details). - - Like semantic values, locations can be reached in actions using a -dedicated set of constructs. In the example above, the location of the -whole grouping is `@$', while the locations of the subexpressions are -`@1' and `@3'. - - When a rule is matched, a default action is used to compute the -semantic value of its left hand side (*note Actions::). In the same -way, another default action is used for locations. However, the action -for locations is general enough for most cases, meaning there is -usually no need to describe for each rule how `@$' should be formed. -When building a new location for a given grouping, the default behavior -of the output parser is to take the beginning of the first symbol, and -the end of the last symbol. - - -File: bison.info, Node: Bison Parser, Next: Stages, Prev: Locations Overview, Up: Concepts - -1.7 Bison Output: the Parser File -================================= - -When you run Bison, you give it a Bison grammar file as input. The -output is a C source file that parses the language described by the -grammar. This file is called a "Bison parser". Keep in mind that the -Bison utility and the Bison parser are two distinct programs: the Bison -utility is a program whose output is the Bison parser that becomes part -of your program. - - The job of the Bison parser is to group tokens into groupings -according to the grammar rules--for example, to build identifiers and -operators into expressions. As it does this, it runs the actions for -the grammar rules it uses. - - The tokens come from a function called the "lexical analyzer" that -you must supply in some fashion (such as by writing it in C). The Bison -parser calls the lexical analyzer each time it wants a new token. It -doesn't know what is "inside" the tokens (though their semantic values -may reflect this). Typically the lexical analyzer makes the tokens by -parsing characters of text, but Bison does not depend on this. *Note -The Lexical Analyzer Function `yylex': Lexical. - - The Bison parser file is C code which defines a function named -`yyparse' which implements that grammar. This function does not make a -complete C program: you must supply some additional functions. One is -the lexical analyzer. Another is an error-reporting function which the -parser calls to report an error. In addition, a complete C program must -start with a function called `main'; you have to provide this, and -arrange for it to call `yyparse' or the parser will never run. *Note -Parser C-Language Interface: Interface. - - Aside from the token type names and the symbols in the actions you -write, all symbols defined in the Bison parser file itself begin with -`yy' or `YY'. This includes interface functions such as the lexical -analyzer function `yylex', the error reporting function `yyerror' and -the parser function `yyparse' itself. This also includes numerous -identifiers used for internal purposes. Therefore, you should avoid -using C identifiers starting with `yy' or `YY' in the Bison grammar -file except for the ones defined in this manual. Also, you should -avoid using the C identifiers `malloc' and `free' for anything other -than their usual meanings. - - In some cases the Bison parser file includes system headers, and in -those cases your code should respect the identifiers reserved by those -headers. On some non-GNU hosts, `<alloca.h>', `<malloc.h>', -`<stddef.h>', and `<stdlib.h>' are included as needed to declare memory -allocators and related types. `<libintl.h>' is included if message -translation is in use (*note Internationalization::). Other system -headers may be included if you define `YYDEBUG' to a nonzero value -(*note Tracing Your Parser: Tracing.). - - -File: bison.info, Node: Stages, Next: Grammar Layout, Prev: Bison Parser, Up: Concepts - -1.8 Stages in Using Bison -========================= - -The actual language-design process using Bison, from grammar -specification to a working compiler or interpreter, has these parts: - - 1. Formally specify the grammar in a form recognized by Bison (*note - Bison Grammar Files: Grammar File.). For each grammatical rule in - the language, describe the action that is to be taken when an - instance of that rule is recognized. The action is described by a - sequence of C statements. - - 2. Write a lexical analyzer to process input and pass tokens to the - parser. The lexical analyzer may be written by hand in C (*note - The Lexical Analyzer Function `yylex': Lexical.). It could also - be produced using Lex, but the use of Lex is not discussed in this - manual. - - 3. Write a controlling function that calls the Bison-produced parser. - - 4. Write error-reporting routines. - - To turn this source code as written into a runnable program, you -must follow these steps: - - 1. Run Bison on the grammar to produce the parser. - - 2. Compile the code output by Bison, as well as any other source - files. - - 3. Link the object files to produce the finished product. - - -File: bison.info, Node: Grammar Layout, Prev: Stages, Up: Concepts - -1.9 The Overall Layout of a Bison Grammar -========================================= - -The input file for the Bison utility is a "Bison grammar file". The -general form of a Bison grammar file is as follows: - - %{ - PROLOGUE - %} - - BISON DECLARATIONS - - %% - GRAMMAR RULES - %% - EPILOGUE - -The `%%', `%{' and `%}' are punctuation that appears in every Bison -grammar file to separate the sections. - - The prologue may define types and variables used in the actions. -You can also use preprocessor commands to define macros used there, and -use `#include' to include header files that do any of these things. -You need to declare the lexical analyzer `yylex' and the error printer -`yyerror' here, along with any other global identifiers used by the -actions in the grammar rules. - - The Bison declarations declare the names of the terminal and -nonterminal symbols, and may also describe operator precedence and the -data types of semantic values of various symbols. - - The grammar rules define how to construct each nonterminal symbol -from its parts. - - The epilogue can contain any code you want to use. Often the -definitions of functions declared in the prologue go here. In a simple -program, all the rest of the program can go here. - - -File: bison.info, Node: Examples, Next: Grammar File, Prev: Concepts, Up: Top - -2 Examples -********** - -Now we show and explain three sample programs written using Bison: a -reverse polish notation calculator, an algebraic (infix) notation -calculator, and a multi-function calculator. All three have been tested -under BSD Unix 4.3; each produces a usable, though limited, interactive -desk-top calculator. - - These examples are simple, but Bison grammars for real programming -languages are written the same way. You can copy these examples into a -source file to try them. - -* Menu: - -* RPN Calc:: Reverse polish notation calculator; - a first example with no operator precedence. -* Infix Calc:: Infix (algebraic) notation calculator. - Operator precedence is introduced. -* Simple Error Recovery:: Continuing after syntax errors. -* Location Tracking Calc:: Demonstrating the use of @N and @$. -* Multi-function Calc:: Calculator with memory and trig functions. - It uses multiple data-types for semantic values. -* Exercises:: Ideas for improving the multi-function calculator. - - -File: bison.info, Node: RPN Calc, Next: Infix Calc, Up: Examples - -2.1 Reverse Polish Notation Calculator -====================================== - -The first example is that of a simple double-precision "reverse polish -notation" calculator (a calculator using postfix operators). This -example provides a good starting point, since operator precedence is -not an issue. The second example will illustrate how operator -precedence is handled. - - The source code for this calculator is named `rpcalc.y'. The `.y' -extension is a convention used for Bison input files. - -* Menu: - -* Rpcalc Declarations:: Prologue (declarations) for rpcalc. -* Rpcalc Rules:: Grammar Rules for rpcalc, with explanation. -* Rpcalc Lexer:: The lexical analyzer. -* Rpcalc Main:: The controlling function. -* Rpcalc Error:: The error reporting function. -* Rpcalc Generate:: Running Bison on the grammar file. -* Rpcalc Compile:: Run the C compiler on the output code. - - -File: bison.info, Node: Rpcalc Declarations, Next: Rpcalc Rules, Up: RPN Calc - -2.1.1 Declarations for `rpcalc' -------------------------------- - -Here are the C and Bison declarations for the reverse polish notation -calculator. As in C, comments are placed between `/*...*/'. - - /* Reverse polish notation calculator. */ - - %{ - #define YYSTYPE double - #include <math.h> - int yylex (void); - void yyerror (char const *); - %} - - %token NUM - - %% /* Grammar rules and actions follow. */ - - The declarations section (*note The prologue: Prologue.) contains two -preprocessor directives and two forward declarations. - - The `#define' directive defines the macro `YYSTYPE', thus specifying -the C data type for semantic values of both tokens and groupings (*note -Data Types of Semantic Values: Value Type.). The Bison parser will use -whatever type `YYSTYPE' is defined as; if you don't define it, `int' is -the default. Because we specify `double', each token and each -expression has an associated value, which is a floating point number. - - The `#include' directive is used to declare the exponentiation -function `pow'. - - The forward declarations for `yylex' and `yyerror' are needed -because the C language requires that functions be declared before they -are used. These functions will be defined in the epilogue, but the -parser calls them so they must be declared in the prologue. - - The second section, Bison declarations, provides information to Bison -about the token types (*note The Bison Declarations Section: Bison -Declarations.). Each terminal symbol that is not a single-character -literal must be declared here. (Single-character literals normally -don't need to be declared.) In this example, all the arithmetic -operators are designated by single-character literals, so the only -terminal symbol that needs to be declared is `NUM', the token type for -numeric constants. - - -File: bison.info, Node: Rpcalc Rules, Next: Rpcalc Lexer, Prev: Rpcalc Declarations, Up: RPN Calc - -2.1.2 Grammar Rules for `rpcalc' --------------------------------- - -Here are the grammar rules for the reverse polish notation calculator. - - input: /* empty */ - | input line - ; - - line: '\n' - | exp '\n' { printf ("\t%.10g\n", $1); } - ; - - exp: NUM { $$ = $1; } - | exp exp '+' { $$ = $1 + $2; } - | exp exp '-' { $$ = $1 - $2; } - | exp exp '*' { $$ = $1 * $2; } - | exp exp '/' { $$ = $1 / $2; } - /* Exponentiation */ - | exp exp '^' { $$ = pow ($1, $2); } - /* Unary minus */ - | exp 'n' { $$ = -$1; } - ; - %% - - The groupings of the rpcalc "language" defined here are the -expression (given the name `exp'), the line of input (`line'), and the -complete input transcript (`input'). Each of these nonterminal symbols -has several alternate rules, joined by the vertical bar `|' which is -read as "or". The following sections explain what these rules mean. - - The semantics of the language is determined by the actions taken -when a grouping is recognized. The actions are the C code that appears -inside braces. *Note Actions::. - - You must specify these actions in C, but Bison provides the means for -passing semantic values between the rules. In each action, the -pseudo-variable `$$' stands for the semantic value for the grouping -that the rule is going to construct. Assigning a value to `$$' is the -main job of most actions. The semantic values of the components of the -rule are referred to as `$1', `$2', and so on. - -* Menu: - -* Rpcalc Input:: -* Rpcalc Line:: -* Rpcalc Expr:: - - -File: bison.info, Node: Rpcalc Input, Next: Rpcalc Line, Up: Rpcalc Rules - -2.1.2.1 Explanation of `input' -.............................. - -Consider the definition of `input': - - input: /* empty */ - | input line - ; - - This definition reads as follows: "A complete input is either an -empty string, or a complete input followed by an input line". Notice -that "complete input" is defined in terms of itself. This definition -is said to be "left recursive" since `input' appears always as the -leftmost symbol in the sequence. *Note Recursive Rules: Recursion. - - The first alternative is empty because there are no symbols between -the colon and the first `|'; this means that `input' can match an empty -string of input (no tokens). We write the rules this way because it is -legitimate to type `Ctrl-d' right after you start the calculator. It's -conventional to put an empty alternative first and write the comment -`/* empty */' in it. - - The second alternate rule (`input line') handles all nontrivial -input. It means, "After reading any number of lines, read one more -line if possible." The left recursion makes this rule into a loop. -Since the first alternative matches empty input, the loop can be -executed zero or more times. - - The parser function `yyparse' continues to process input until a -grammatical error is seen or the lexical analyzer says there are no more -input tokens; we will arrange for the latter to happen at end-of-input. - - -File: bison.info, Node: Rpcalc Line, Next: Rpcalc Expr, Prev: Rpcalc Input, Up: Rpcalc Rules - -2.1.2.2 Explanation of `line' -............................. - -Now consider the definition of `line': - - line: '\n' - | exp '\n' { printf ("\t%.10g\n", $1); } - ; - - The first alternative is a token which is a newline character; this -means that rpcalc accepts a blank line (and ignores it, since there is -no action). The second alternative is an expression followed by a -newline. This is the alternative that makes rpcalc useful. The -semantic value of the `exp' grouping is the value of `$1' because the -`exp' in question is the first symbol in the alternative. The action -prints this value, which is the result of the computation the user -asked for. - - This action is unusual because it does not assign a value to `$$'. -As a consequence, the semantic value associated with the `line' is -uninitialized (its value will be unpredictable). This would be a bug if -that value were ever used, but we don't use it: once rpcalc has printed -the value of the user's input line, that value is no longer needed. - - -File: bison.info, Node: Rpcalc Expr, Prev: Rpcalc Line, Up: Rpcalc Rules - -2.1.2.3 Explanation of `expr' -............................. - -The `exp' grouping has several rules, one for each kind of expression. -The first rule handles the simplest expressions: those that are just -numbers. The second handles an addition-expression, which looks like -two expressions followed by a plus-sign. The third handles -subtraction, and so on. - - exp: NUM - | exp exp '+' { $$ = $1 + $2; } - | exp exp '-' { $$ = $1 - $2; } - ... - ; - - We have used `|' to join all the rules for `exp', but we could -equally well have written them separately: - - exp: NUM ; - exp: exp exp '+' { $$ = $1 + $2; } ; - exp: exp exp '-' { $$ = $1 - $2; } ; - ... - - Most of the rules have actions that compute the value of the -expression in terms of the value of its parts. For example, in the -rule for addition, `$1' refers to the first component `exp' and `$2' -refers to the second one. The third component, `'+'', has no meaningful -associated semantic value, but if it had one you could refer to it as -`$3'. When `yyparse' recognizes a sum expression using this rule, the -sum of the two subexpressions' values is produced as the value of the -entire expression. *Note Actions::. - - You don't have to give an action for every rule. When a rule has no -action, Bison by default copies the value of `$1' into `$$'. This is -what happens in the first rule (the one that uses `NUM'). - - The formatting shown here is the recommended convention, but Bison -does not require it. You can add or change white space as much as you -wish. For example, this: - - exp : NUM | exp exp '+' {$$ = $1 + $2; } | ... ; - -means the same thing as this: - - exp: NUM - | exp exp '+' { $$ = $1 + $2; } - | ... - ; - -The latter, however, is much more readable. - - -File: bison.info, Node: Rpcalc Lexer, Next: Rpcalc Main, Prev: Rpcalc Rules, Up: RPN Calc - -2.1.3 The `rpcalc' Lexical Analyzer ------------------------------------ - -The lexical analyzer's job is low-level parsing: converting characters -or sequences of characters into tokens. The Bison parser gets its -tokens by calling the lexical analyzer. *Note The Lexical Analyzer -Function `yylex': Lexical. - - Only a simple lexical analyzer is needed for the RPN calculator. -This lexical analyzer skips blanks and tabs, then reads in numbers as -`double' and returns them as `NUM' tokens. Any other character that -isn't part of a number is a separate token. Note that the token-code -for such a single-character token is the character itself. - - The return value of the lexical analyzer function is a numeric code -which represents a token type. The same text used in Bison rules to -stand for this token type is also a C expression for the numeric code -for the type. This works in two ways. If the token type is a -character literal, then its numeric code is that of the character; you -can use the same character literal in the lexical analyzer to express -the number. If the token type is an identifier, that identifier is -defined by Bison as a C macro whose definition is the appropriate -number. In this example, therefore, `NUM' becomes a macro for `yylex' -to use. - - The semantic value of the token (if it has one) is stored into the -global variable `yylval', which is where the Bison parser will look for -it. (The C data type of `yylval' is `YYSTYPE', which was defined at -the beginning of the grammar; *note Declarations for `rpcalc': Rpcalc -Declarations.) - - A token type code of zero is returned if the end-of-input is -encountered. (Bison recognizes any nonpositive value as indicating -end-of-input.) - - Here is the code for the lexical analyzer: - - /* The lexical analyzer returns a double floating point - number on the stack and the token NUM, or the numeric code - of the character read if not a number. It skips all blanks - and tabs, and returns 0 for end-of-input. */ - - #include <ctype.h> - - int - yylex (void) - { - int c; - - /* Skip white space. */ - while ((c = getchar ()) == ' ' || c == '\t') - ; - /* Process numbers. */ - if (c == '.' || isdigit (c)) - { - ungetc (c, stdin); - scanf ("%lf", &yylval); - return NUM; - } - /* Return end-of-input. */ - if (c == EOF) - return 0; - /* Return a single char. */ - return c; - } - - -File: bison.info, Node: Rpcalc Main, Next: Rpcalc Error, Prev: Rpcalc Lexer, Up: RPN Calc - -2.1.4 The Controlling Function ------------------------------- - -In keeping with the spirit of this example, the controlling function is -kept to the bare minimum. The only requirement is that it call -`yyparse' to start the process of parsing. - - int - main (void) - { - return yyparse (); - } - - -File: bison.info, Node: Rpcalc Error, Next: Rpcalc Generate, Prev: Rpcalc Main, Up: RPN Calc - -2.1.5 The Error Reporting Routine ---------------------------------- - -When `yyparse' detects a syntax error, it calls the error reporting -function `yyerror' to print an error message (usually but not always -`"syntax error"'). It is up to the programmer to supply `yyerror' -(*note Parser C-Language Interface: Interface.), so here is the -definition we will use: - - #include <stdio.h> - - /* Called by yyparse on error. */ - void - yyerror (char const *s) - { - fprintf (stderr, "%s\n", s); - } - - After `yyerror' returns, the Bison parser may recover from the error -and continue parsing if the grammar contains a suitable error rule -(*note Error Recovery::). Otherwise, `yyparse' returns nonzero. We -have not written any error rules in this example, so any invalid input -will cause the calculator program to exit. This is not clean behavior -for a real calculator, but it is adequate for the first example. - - -File: bison.info, Node: Rpcalc Generate, Next: Rpcalc Compile, Prev: Rpcalc Error, Up: RPN Calc - -2.1.6 Running Bison to Make the Parser --------------------------------------- - -Before running Bison to produce a parser, we need to decide how to -arrange all the source code in one or more source files. For such a -simple example, the easiest thing is to put everything in one file. The -definitions of `yylex', `yyerror' and `main' go at the end, in the -epilogue of the file (*note The Overall Layout of a Bison Grammar: -Grammar Layout.). - - For a large project, you would probably have several source files, -and use `make' to arrange to recompile them. - - With all the source in a single file, you use the following command -to convert it into a parser file: - - bison FILE.y - -In this example the file was called `rpcalc.y' (for "Reverse Polish -CALCulator"). Bison produces a file named `FILE.tab.c', removing the -`.y' from the original file name. The file output by Bison contains -the source code for `yyparse'. The additional functions in the input -file (`yylex', `yyerror' and `main') are copied verbatim to the output. - - -File: bison.info, Node: Rpcalc Compile, Prev: Rpcalc Generate, Up: RPN Calc - -2.1.7 Compiling the Parser File -------------------------------- - -Here is how to compile and run the parser file: - - # List files in current directory. - $ ls - rpcalc.tab.c rpcalc.y - - # Compile the Bison parser. - # `-lm' tells compiler to search math library for `pow'. - $ cc -lm -o rpcalc rpcalc.tab.c - - # List files again. - $ ls - rpcalc rpcalc.tab.c rpcalc.y - - The file `rpcalc' now contains the executable code. Here is an -example session using `rpcalc'. - - $ rpcalc - 4 9 + - 13 - 3 7 + 3 4 5 *+- - -13 - 3 7 + 3 4 5 * + - n Note the unary minus, `n' - 13 - 5 6 / 4 n + - -3.166666667 - 3 4 ^ Exponentiation - 81 - ^D End-of-file indicator - $ - - -File: bison.info, Node: Infix Calc, Next: Simple Error Recovery, Prev: RPN Calc, Up: Examples - -2.2 Infix Notation Calculator: `calc' -===================================== - -We now modify rpcalc to handle infix operators instead of postfix. -Infix notation involves the concept of operator precedence and the need -for parentheses nested to arbitrary depth. Here is the Bison code for -`calc.y', an infix desk-top calculator. - - /* Infix notation calculator. */ - - %{ - #define YYSTYPE double - #include <math.h> - #include <stdio.h> - int yylex (void); - void yyerror (char const *); - %} - - /* Bison declarations. */ - %token NUM - %left '-' '+' - %left '*' '/' - %left NEG /* negation--unary minus */ - %right '^' /* exponentiation */ - - %% /* The grammar follows. */ - input: /* empty */ - | input line - ; - - line: '\n' - | exp '\n' { printf ("\t%.10g\n", $1); } - ; - - exp: NUM { $$ = $1; } - | exp '+' exp { $$ = $1 + $3; } - | exp '-' exp { $$ = $1 - $3; } - | exp '*' exp { $$ = $1 * $3; } - | exp '/' exp { $$ = $1 / $3; } - | '-' exp %prec NEG { $$ = -$2; } - | exp '^' exp { $$ = pow ($1, $3); } - | '(' exp ')' { $$ = $2; } - ; - %% - -The functions `yylex', `yyerror' and `main' can be the same as before. - - There are two important new features shown in this code. - - In the second section (Bison declarations), `%left' declares token -types and says they are left-associative operators. The declarations -`%left' and `%right' (right associativity) take the place of `%token' -which is used to declare a token type name without associativity. -(These tokens are single-character literals, which ordinarily don't -need to be declared. We declare them here to specify the -associativity.) - - Operator precedence is determined by the line ordering of the -declarations; the higher the line number of the declaration (lower on -the page or screen), the higher the precedence. Hence, exponentiation -has the highest precedence, unary minus (`NEG') is next, followed by -`*' and `/', and so on. *Note Operator Precedence: Precedence. - - The other important new feature is the `%prec' in the grammar -section for the unary minus operator. The `%prec' simply instructs -Bison that the rule `| '-' exp' has the same precedence as `NEG'--in -this case the next-to-highest. *Note Context-Dependent Precedence: -Contextual Precedence. - - Here is a sample run of `calc.y': - - $ calc - 4 + 4.5 - (34/(8*3+-3)) - 6.880952381 - -56 + 2 - -54 - 3 ^ 2 - 9 - - -File: bison.info, Node: Simple Error Recovery, Next: Location Tracking Calc, Prev: Infix Calc, Up: Examples - -2.3 Simple Error Recovery -========================= - -Up to this point, this manual has not addressed the issue of "error -recovery"--how to continue parsing after the parser detects a syntax -error. All we have handled is error reporting with `yyerror'. Recall -that by default `yyparse' returns after calling `yyerror'. This means -that an erroneous input line causes the calculator program to exit. -Now we show how to rectify this deficiency. - - The Bison language itself includes the reserved word `error', which -may be included in the grammar rules. In the example below it has been -added to one of the alternatives for `line': - - line: '\n' - | exp '\n' { printf ("\t%.10g\n", $1); } - | error '\n' { yyerrok; } - ; - - This addition to the grammar allows for simple error recovery in the -event of a syntax error. If an expression that cannot be evaluated is -read, the error will be recognized by the third rule for `line', and -parsing will continue. (The `yyerror' function is still called upon to -print its message as well.) The action executes the statement -`yyerrok', a macro defined automatically by Bison; its meaning is that -error recovery is complete (*note Error Recovery::). Note the -difference between `yyerrok' and `yyerror'; neither one is a misprint. - - This form of error recovery deals with syntax errors. There are -other kinds of errors; for example, division by zero, which raises an -exception signal that is normally fatal. A real calculator program -must handle this signal and use `longjmp' to return to `main' and -resume parsing input lines; it would also have to discard the rest of -the current line of input. We won't discuss this issue further because -it is not specific to Bison programs. - - -File: bison.info, Node: Location Tracking Calc, Next: Multi-function Calc, Prev: Simple Error Recovery, Up: Examples - -2.4 Location Tracking Calculator: `ltcalc' -========================================== - -This example extends the infix notation calculator with location -tracking. This feature will be used to improve the error messages. For -the sake of clarity, this example is a simple integer calculator, since -most of the work needed to use locations will be done in the lexical -analyzer. - -* Menu: - -* Ltcalc Declarations:: Bison and C declarations for ltcalc. -* Ltcalc Rules:: Grammar rules for ltcalc, with explanations. -* Ltcalc Lexer:: The lexical analyzer. - - -File: bison.info, Node: Ltcalc Declarations, Next: Ltcalc Rules, Up: Location Tracking Calc - -2.4.1 Declarations for `ltcalc' -------------------------------- - -The C and Bison declarations for the location tracking calculator are -the same as the declarations for the infix notation calculator. - - /* Location tracking calculator. */ - - %{ - #define YYSTYPE int - #include <math.h> - int yylex (void); - void yyerror (char const *); - %} - - /* Bison declarations. */ - %token NUM - - %left '-' '+' - %left '*' '/' - %left NEG - %right '^' - - %% /* The grammar follows. */ - -Note there are no declarations specific to locations. Defining a data -type for storing locations is not needed: we will use the type provided -by default (*note Data Types of Locations: Location Type.), which is a -four member structure with the following integer fields: `first_line', -`first_column', `last_line' and `last_column'. By conventions, and in -accordance with the GNU Coding Standards and common practice, the line -and column count both start at 1. - - -File: bison.info, Node: Ltcalc Rules, Next: Ltcalc Lexer, Prev: Ltcalc Declarations, Up: Location Tracking Calc - -2.4.2 Grammar Rules for `ltcalc' --------------------------------- - -Whether handling locations or not has no effect on the syntax of your -language. Therefore, grammar rules for this example will be very close -to those of the previous example: we will only modify them to benefit -from the new information. - - Here, we will use locations to report divisions by zero, and locate -the wrong expressions or subexpressions. - - input : /* empty */ - | input line - ; - - line : '\n' - | exp '\n' { printf ("%d\n", $1); } - ; - - exp : NUM { $$ = $1; } - | exp '+' exp { $$ = $1 + $3; } - | exp '-' exp { $$ = $1 - $3; } - | exp '*' exp { $$ = $1 * $3; } - | exp '/' exp - { - if ($3) - $$ = $1 / $3; - else - { - $$ = 1; - fprintf (stderr, "%d.%d-%d.%d: division by zero", - @3.first_line, @3.first_column, - @3.last_line, @3.last_column); - } - } - | '-' exp %prec NEG { $$ = -$2; } - | exp '^' exp { $$ = pow ($1, $3); } - | '(' exp ')' { $$ = $2; } - - This code shows how to reach locations inside of semantic actions, by -using the pseudo-variables `@N' for rule components, and the -pseudo-variable `@$' for groupings. - - We don't need to assign a value to `@$': the output parser does it -automatically. By default, before executing the C code of each action, -`@$' is set to range from the beginning of `@1' to the end of `@N', for -a rule with N components. This behavior can be redefined (*note -Default Action for Locations: Location Default Action.), and for very -specific rules, `@$' can be computed by hand. - - -File: bison.info, Node: Ltcalc Lexer, Prev: Ltcalc Rules, Up: Location Tracking Calc - -2.4.3 The `ltcalc' Lexical Analyzer. ------------------------------------- - -Until now, we relied on Bison's defaults to enable location tracking. -The next step is to rewrite the lexical analyzer, and make it able to -feed the parser with the token locations, as it already does for -semantic values. - - To this end, we must take into account every single character of the -input text, to avoid the computed locations of being fuzzy or wrong: - - int - yylex (void) - { - int c; - - /* Skip white space. */ - while ((c = getchar ()) == ' ' || c == '\t') - ++yylloc.last_column; - - /* Step. */ - yylloc.first_line = yylloc.last_line; - yylloc.first_column = yylloc.last_column; - - /* Process numbers. */ - if (isdigit (c)) - { - yylval = c - '0'; - ++yylloc.last_column; - while (isdigit (c = getchar ())) - { - ++yylloc.last_column; - yylval = yylval * 10 + c - '0'; - } - ungetc (c, stdin); - return NUM; - } - - /* Return end-of-input. */ - if (c == EOF) - return 0; - - /* Return a single char, and update location. */ - if (c == '\n') - { - ++yylloc.last_line; - yylloc.last_column = 0; - } - else - ++yylloc.last_column; - return c; - } - - Basically, the lexical analyzer performs the same processing as -before: it skips blanks and tabs, and reads numbers or single-character -tokens. In addition, it updates `yylloc', the global variable (of type -`YYLTYPE') containing the token's location. - - Now, each time this function returns a token, the parser has its -number as well as its semantic value, and its location in the text. -The last needed change is to initialize `yylloc', for example in the -controlling function: - - int - main (void) - { - yylloc.first_line = yylloc.last_line = 1; - yylloc.first_column = yylloc.last_column = 0; - return yyparse (); - } - - Remember that computing locations is not a matter of syntax. Every -character must be associated to a location update, whether it is in -valid input, in comments, in literal strings, and so on. - - -File: bison.info, Node: Multi-function Calc, Next: Exercises, Prev: Location Tracking Calc, Up: Examples - -2.5 Multi-Function Calculator: `mfcalc' -======================================= - -Now that the basics of Bison have been discussed, it is time to move on -to a more advanced problem. The above calculators provided only five -functions, `+', `-', `*', `/' and `^'. It would be nice to have a -calculator that provides other mathematical functions such as `sin', -`cos', etc. - - It is easy to add new operators to the infix calculator as long as -they are only single-character literals. The lexical analyzer `yylex' -passes back all nonnumeric characters as tokens, so new grammar rules -suffice for adding a new operator. But we want something more -flexible: built-in functions whose syntax has this form: - - FUNCTION_NAME (ARGUMENT) - -At the same time, we will add memory to the calculator, by allowing you -to create named variables, store values in them, and use them later. -Here is a sample session with the multi-function calculator: - - $ mfcalc - pi = 3.141592653589 - 3.1415926536 - sin(pi) - 0.0000000000 - alpha = beta1 = 2.3 - 2.3000000000 - alpha - 2.3000000000 - ln(alpha) - 0.8329091229 - exp(ln(beta1)) - 2.3000000000 - $ - - Note that multiple assignment and nested function calls are -permitted. - -* Menu: - -* Mfcalc Declarations:: Bison declarations for multi-function calculator. -* Mfcalc Rules:: Grammar rules for the calculator. -* Mfcalc Symbol Table:: Symbol table management subroutines. - - -File: bison.info, Node: Mfcalc Declarations, Next: Mfcalc Rules, Up: Multi-function Calc - -2.5.1 Declarations for `mfcalc' -------------------------------- - -Here are the C and Bison declarations for the multi-function calculator. - - %{ - #include <math.h> /* For math functions, cos(), sin(), etc. */ - #include "calc.h" /* Contains definition of `symrec'. */ - int yylex (void); - void yyerror (char const *); - %} - %union { - double val; /* For returning numbers. */ - symrec *tptr; /* For returning symbol-table pointers. */ - } - %token <val> NUM /* Simple double precision number. */ - %token <tptr> VAR FNCT /* Variable and Function. */ - %type <val> exp - - %right '=' - %left '-' '+' - %left '*' '/' - %left NEG /* negation--unary minus */ - %right '^' /* exponentiation */ - %% /* The grammar follows. */ - - The above grammar introduces only two new features of the Bison -language. These features allow semantic values to have various data -types (*note More Than One Value Type: Multiple Types.). - - The `%union' declaration specifies the entire list of possible types; -this is instead of defining `YYSTYPE'. The allowable types are now -double-floats (for `exp' and `NUM') and pointers to entries in the -symbol table. *Note The Collection of Value Types: Union Decl. - - Since values can now have various types, it is necessary to -associate a type with each grammar symbol whose semantic value is used. -These symbols are `NUM', `VAR', `FNCT', and `exp'. Their declarations -are augmented with information about their data type (placed between -angle brackets). - - The Bison construct `%type' is used for declaring nonterminal -symbols, just as `%token' is used for declaring token types. We have -not used `%type' before because nonterminal symbols are normally -declared implicitly by the rules that define them. But `exp' must be -declared explicitly so we can specify its value type. *Note -Nonterminal Symbols: Type Decl. - - -File: bison.info, Node: Mfcalc Rules, Next: Mfcalc Symbol Table, Prev: Mfcalc Declarations, Up: Multi-function Calc - -2.5.2 Grammar Rules for `mfcalc' --------------------------------- - -Here are the grammar rules for the multi-function calculator. Most of -them are copied directly from `calc'; three rules, those which mention -`VAR' or `FNCT', are new. - - input: /* empty */ - | input line - ; - - line: - '\n' - | exp '\n' { printf ("\t%.10g\n", $1); } - | error '\n' { yyerrok; } - ; - - exp: NUM { $$ = $1; } - | VAR { $$ = $1->value.var; } - | VAR '=' exp { $$ = $3; $1->value.var = $3; } - | FNCT '(' exp ')' { $$ = (*($1->value.fnctptr))($3); } - | exp '+' exp { $$ = $1 + $3; } - | exp '-' exp { $$ = $1 - $3; } - | exp '*' exp { $$ = $1 * $3; } - | exp '/' exp { $$ = $1 / $3; } - | '-' exp %prec NEG { $$ = -$2; } - | exp '^' exp { $$ = pow ($1, $3); } - | '(' exp ')' { $$ = $2; } - ; - /* End of grammar. */ - %% - - -File: bison.info, Node: Mfcalc Symbol Table, Prev: Mfcalc Rules, Up: Multi-function Calc - -2.5.3 The `mfcalc' Symbol Table -------------------------------- - -The multi-function calculator requires a symbol table to keep track of -the names and meanings of variables and functions. This doesn't affect -the grammar rules (except for the actions) or the Bison declarations, -but it requires some additional C functions for support. - - The symbol table itself consists of a linked list of records. Its -definition, which is kept in the header `calc.h', is as follows. It -provides for either functions or variables to be placed in the table. - - /* Function type. */ - typedef double (*func_t) (double); - - /* Data type for links in the chain of symbols. */ - struct symrec - { - char *name; /* name of symbol */ - int type; /* type of symbol: either VAR or FNCT */ - union - { - double var; /* value of a VAR */ - func_t fnctptr; /* value of a FNCT */ - } value; - struct symrec *next; /* link field */ - }; - - typedef struct symrec symrec; - - /* The symbol table: a chain of `struct symrec'. */ - extern symrec *sym_table; - - symrec *putsym (char const *, int); - symrec *getsym (char const *); - - The new version of `main' includes a call to `init_table', a -function that initializes the symbol table. Here it is, and -`init_table' as well: - - #include <stdio.h> - - /* Called by yyparse on error. */ - void - yyerror (char const *s) - { - printf ("%s\n", s); - } - - struct init - { - char const *fname; - double (*fnct) (double); - }; - - struct init const arith_fncts[] = - { - "sin", sin, - "cos", cos, - "atan", atan, - "ln", log, - "exp", exp, - "sqrt", sqrt, - 0, 0 - }; - - /* The symbol table: a chain of `struct symrec'. */ - symrec *sym_table; - - /* Put arithmetic functions in table. */ - void - init_table (void) - { - int i; - symrec *ptr; - for (i = 0; arith_fncts[i].fname != 0; i++) - { - ptr = putsym (arith_fncts[i].fname, FNCT); - ptr->value.fnctptr = arith_fncts[i].fnct; - } - } - - int - main (void) - { - init_table (); - return yyparse (); - } - - By simply editing the initialization list and adding the necessary -include files, you can add additional functions to the calculator. - - Two important functions allow look-up and installation of symbols in -the symbol table. The function `putsym' is passed a name and the type -(`VAR' or `FNCT') of the object to be installed. The object is linked -to the front of the list, and a pointer to the object is returned. The -function `getsym' is passed the name of the symbol to look up. If -found, a pointer to that symbol is returned; otherwise zero is returned. - - symrec * - putsym (char const *sym_name, int sym_type) - { - symrec *ptr; - ptr = (symrec *) malloc (sizeof (symrec)); - ptr->name = (char *) malloc (strlen (sym_name) + 1); - strcpy (ptr->name,sym_name); - ptr->type = sym_type; - ptr->value.var = 0; /* Set value to 0 even if fctn. */ - ptr->next = (struct symrec *)sym_table; - sym_table = ptr; - return ptr; - } - - symrec * - getsym (char const *sym_name) - { - symrec *ptr; - for (ptr = sym_table; ptr != (symrec *) 0; - ptr = (symrec *)ptr->next) - if (strcmp (ptr->name,sym_name) == 0) - return ptr; - return 0; - } - - The function `yylex' must now recognize variables, numeric values, -and the single-character arithmetic operators. Strings of alphanumeric -characters with a leading letter are recognized as either variables or -functions depending on what the symbol table says about them. - - The string is passed to `getsym' for look up in the symbol table. If -the name appears in the table, a pointer to its location and its type -(`VAR' or `FNCT') is returned to `yyparse'. If it is not already in -the table, then it is installed as a `VAR' using `putsym'. Again, a -pointer and its type (which must be `VAR') is returned to `yyparse'. - - No change is needed in the handling of numeric values and arithmetic -operators in `yylex'. - - #include <ctype.h> - - int - yylex (void) - { - int c; - - /* Ignore white space, get first nonwhite character. */ - while ((c = getchar ()) == ' ' || c == '\t'); - - if (c == EOF) - return 0; - - /* Char starts a number => parse the number. */ - if (c == '.' || isdigit (c)) - { - ungetc (c, stdin); - scanf ("%lf", &yylval.val); - return NUM; - } - - /* Char starts an identifier => read the name. */ - if (isalpha (c)) - { - symrec *s; - static char *symbuf = 0; - static int length = 0; - int i; - - /* Initially make the buffer long enough - for a 40-character symbol name. */ - if (length == 0) - length = 40, symbuf = (char *)malloc (length + 1); - - i = 0; - do - { - /* If buffer is full, make it bigger. */ - if (i == length) - { - length *= 2; - symbuf = (char *) realloc (symbuf, length + 1); - } - /* Add this character to the buffer. */ - symbuf[i++] = c; - /* Get another character. */ - c = getchar (); - } - while (isalnum (c)); - - ungetc (c, stdin); - symbuf[i] = '\0'; - - s = getsym (symbuf); - if (s == 0) - s = putsym (symbuf, VAR); - yylval.tptr = s; - return s->type; - } - - /* Any other character is a token by itself. */ - return c; - } - - This program is both powerful and flexible. You may easily add new -functions, and it is a simple job to modify this code to install -predefined variables such as `pi' or `e' as well. - - -File: bison.info, Node: Exercises, Prev: Multi-function Calc, Up: Examples - -2.6 Exercises -============= - - 1. Add some new functions from `math.h' to the initialization list. - - 2. Add another array that contains constants and their values. Then - modify `init_table' to add these constants to the symbol table. - It will be easiest to give the constants type `VAR'. - - 3. Make the program report an error if the user refers to an - uninitialized variable in any way except to store a value in it. - - -File: bison.info, Node: Grammar File, Next: Interface, Prev: Examples, Up: Top - -3 Bison Grammar Files -********************* - -Bison takes as input a context-free grammar specification and produces a -C-language function that recognizes correct instances of the grammar. - - The Bison grammar input file conventionally has a name ending in -`.y'. *Note Invoking Bison: Invocation. - -* Menu: - -* Grammar Outline:: Overall layout of the grammar file. -* Symbols:: Terminal and nonterminal symbols. -* Rules:: How to write grammar rules. -* Recursion:: Writing recursive rules. -* Semantics:: Semantic values and actions. -* Locations:: Locations and actions. -* Declarations:: All kinds of Bison declarations are described here. -* Multiple Parsers:: Putting more than one Bison parser in one program. - - -File: bison.info, Node: Grammar Outline, Next: Symbols, Up: Grammar File - -3.1 Outline of a Bison Grammar -============================== - -A Bison grammar file has four main sections, shown here with the -appropriate delimiters: - - %{ - PROLOGUE - %} - - BISON DECLARATIONS - - %% - GRAMMAR RULES - %% - - EPILOGUE - - Comments enclosed in `/* ... */' may appear in any of the sections. -As a GNU extension, `//' introduces a comment that continues until end -of line. - -* Menu: - -* Prologue:: Syntax and usage of the prologue. -* Prologue Alternatives:: Syntax and usage of alternatives to the prologue. -* Bison Declarations:: Syntax and usage of the Bison declarations section. -* Grammar Rules:: Syntax and usage of the grammar rules section. -* Epilogue:: Syntax and usage of the epilogue. - - -File: bison.info, Node: Prologue, Next: Prologue Alternatives, Up: Grammar Outline - -3.1.1 The prologue ------------------- - -The PROLOGUE section contains macro definitions and declarations of -functions and variables that are used in the actions in the grammar -rules. These are copied to the beginning of the parser file so that -they precede the definition of `yyparse'. You can use `#include' to -get the declarations from a header file. If you don't need any C -declarations, you may omit the `%{' and `%}' delimiters that bracket -this section. - - The PROLOGUE section is terminated by the first occurrence of `%}' -that is outside a comment, a string literal, or a character constant. - - You may have more than one PROLOGUE section, intermixed with the -BISON DECLARATIONS. This allows you to have C and Bison declarations -that refer to each other. For example, the `%union' declaration may -use types defined in a header file, and you may wish to prototype -functions that take arguments of type `YYSTYPE'. This can be done with -two PROLOGUE blocks, one before and one after the `%union' declaration. - - %{ - #define _GNU_SOURCE - #include <stdio.h> - #include "ptypes.h" - %} - - %union { - long int n; - tree t; /* `tree' is defined in `ptypes.h'. */ - } - - %{ - static void print_token_value (FILE *, int, YYSTYPE); - #define YYPRINT(F, N, L) print_token_value (F, N, L) - %} - - ... - - When in doubt, it is usually safer to put prologue code before all -Bison declarations, rather than after. For example, any definitions of -feature test macros like `_GNU_SOURCE' or `_POSIX_C_SOURCE' should -appear before all Bison declarations, as feature test macros can affect -the behavior of Bison-generated `#include' directives. - - -File: bison.info, Node: Prologue Alternatives, Next: Bison Declarations, Prev: Prologue, Up: Grammar Outline - -3.1.2 Prologue Alternatives ---------------------------- - -(The prologue alternatives described here are experimental. More user -feedback will help to determine whether they should become permanent -features.) - - The functionality of PROLOGUE sections can often be subtle and -inflexible. As an alternative, Bison provides a %code directive with -an explicit qualifier field, which identifies the purpose of the code -and thus the location(s) where Bison should generate it. For C/C++, -the qualifier can be omitted for the default location, or it can be one -of `requires', `provides', `top'. *Note %code: Decl Summary. - - Look again at the example of the previous section: - - %{ - #define _GNU_SOURCE - #include <stdio.h> - #include "ptypes.h" - %} - - %union { - long int n; - tree t; /* `tree' is defined in `ptypes.h'. */ - } - - %{ - static void print_token_value (FILE *, int, YYSTYPE); - #define YYPRINT(F, N, L) print_token_value (F, N, L) - %} - - ... - -Notice that there are two PROLOGUE sections here, but there's a subtle -distinction between their functionality. For example, if you decide to -override Bison's default definition for `YYLTYPE', in which PROLOGUE -section should you write your new definition? You should write it in -the first since Bison will insert that code into the parser source code -file _before_ the default `YYLTYPE' definition. In which PROLOGUE -section should you prototype an internal function, `trace_token', that -accepts `YYLTYPE' and `yytokentype' as arguments? You should prototype -it in the second since Bison will insert that code _after_ the -`YYLTYPE' and `yytokentype' definitions. - - This distinction in functionality between the two PROLOGUE sections -is established by the appearance of the `%union' between them. This -behavior raises a few questions. First, why should the position of a -`%union' affect definitions related to `YYLTYPE' and `yytokentype'? -Second, what if there is no `%union'? In that case, the second kind of -PROLOGUE section is not available. This behavior is not intuitive. - - To avoid this subtle `%union' dependency, rewrite the example using a -`%code top' and an unqualified `%code'. Let's go ahead and add the new -`YYLTYPE' definition and the `trace_token' prototype at the same time: - - %code top { - #define _GNU_SOURCE - #include <stdio.h> - - /* WARNING: The following code really belongs - * in a `%code requires'; see below. */ - - #include "ptypes.h" - #define YYLTYPE YYLTYPE - typedef struct YYLTYPE - { - int first_line; - int first_column; - int last_line; - int last_column; - char *filename; - } YYLTYPE; - } - - %union { - long int n; - tree t; /* `tree' is defined in `ptypes.h'. */ - } - - %code { - static void print_token_value (FILE *, int, YYSTYPE); - #define YYPRINT(F, N, L) print_token_value (F, N, L) - static void trace_token (enum yytokentype token, YYLTYPE loc); - } - - ... - -In this way, `%code top' and the unqualified `%code' achieve the same -functionality as the two kinds of PROLOGUE sections, but it's always -explicit which kind you intend. Moreover, both kinds are always -available even in the absence of `%union'. - - The `%code top' block above logically contains two parts. The first -two lines before the warning need to appear near the top of the parser -source code file. The first line after the warning is required by -`YYSTYPE' and thus also needs to appear in the parser source code file. -However, if you've instructed Bison to generate a parser header file -(*note %defines: Decl Summary.), you probably want that line to appear -before the `YYSTYPE' definition in that header file as well. The -`YYLTYPE' definition should also appear in the parser header file to -override the default `YYLTYPE' definition there. - - In other words, in the `%code top' block above, all but the first two -lines are dependency code required by the `YYSTYPE' and `YYLTYPE' -definitions. Thus, they belong in one or more `%code requires': - - %code top { - #define _GNU_SOURCE - #include <stdio.h> - } - - %code requires { - #include "ptypes.h" - } - %union { - long int n; - tree t; /* `tree' is defined in `ptypes.h'. */ - } - - %code requires { - #define YYLTYPE YYLTYPE - typedef struct YYLTYPE - { - int first_line; - int first_column; - int last_line; - int last_column; - char *filename; - } YYLTYPE; - } - - %code { - static void print_token_value (FILE *, int, YYSTYPE); - #define YYPRINT(F, N, L) print_token_value (F, N, L) - static void trace_token (enum yytokentype token, YYLTYPE loc); - } - - ... - -Now Bison will insert `#include "ptypes.h"' and the new `YYLTYPE' -definition before the Bison-generated `YYSTYPE' and `YYLTYPE' -definitions in both the parser source code file and the parser header -file. (By the same reasoning, `%code requires' would also be the -appropriate place to write your own definition for `YYSTYPE'.) - - When you are writing dependency code for `YYSTYPE' and `YYLTYPE', you -should prefer `%code requires' over `%code top' regardless of whether -you instruct Bison to generate a parser header file. When you are -writing code that you need Bison to insert only into the parser source -code file and that has no special need to appear at the top of that -file, you should prefer the unqualified `%code' over `%code top'. -These practices will make the purpose of each block of your code -explicit to Bison and to other developers reading your grammar file. -Following these practices, we expect the unqualified `%code' and `%code -requires' to be the most important of the four PROLOGUE alternatives. - - At some point while developing your parser, you might decide to -provide `trace_token' to modules that are external to your parser. -Thus, you might wish for Bison to insert the prototype into both the -parser header file and the parser source code file. Since this -function is not a dependency required by `YYSTYPE' or `YYLTYPE', it -doesn't make sense to move its prototype to a `%code requires'. More -importantly, since it depends upon `YYLTYPE' and `yytokentype', `%code -requires' is not sufficient. Instead, move its prototype from the -unqualified `%code' to a `%code provides': - - %code top { - #define _GNU_SOURCE - #include <stdio.h> - } - - %code requires { - #include "ptypes.h" - } - %union { - long int n; - tree t; /* `tree' is defined in `ptypes.h'. */ - } - - %code requires { - #define YYLTYPE YYLTYPE - typedef struct YYLTYPE - { - int first_line; - int first_column; - int last_line; - int last_column; - char *filename; - } YYLTYPE; - } - - %code provides { - void trace_token (enum yytokentype token, YYLTYPE loc); - } - - %code { - static void print_token_value (FILE *, int, YYSTYPE); - #define YYPRINT(F, N, L) print_token_value (F, N, L) - } - - ... - -Bison will insert the `trace_token' prototype into both the parser -header file and the parser source code file after the definitions for -`yytokentype', `YYLTYPE', and `YYSTYPE'. - - The above examples are careful to write directives in an order that -reflects the layout of the generated parser source code and header -files: `%code top', `%code requires', `%code provides', and then -`%code'. While your grammar files may generally be easier to read if -you also follow this order, Bison does not require it. Instead, Bison -lets you choose an organization that makes sense to you. - - You may declare any of these directives multiple times in the -grammar file. In that case, Bison concatenates the contained code in -declaration order. This is the only way in which the position of one -of these directives within the grammar file affects its functionality. - - The result of the previous two properties is greater flexibility in -how you may organize your grammar file. For example, you may organize -semantic-type-related directives by semantic type: - - %code requires { #include "type1.h" } - %union { type1 field1; } - %destructor { type1_free ($$); } <field1> - %printer { type1_print ($$); } <field1> - - %code requires { #include "type2.h" } - %union { type2 field2; } - %destructor { type2_free ($$); } <field2> - %printer { type2_print ($$); } <field2> - -You could even place each of the above directive groups in the rules -section of the grammar file next to the set of rules that uses the -associated semantic type. (In the rules section, you must terminate -each of those directives with a semicolon.) And you don't have to -worry that some directive (like a `%union') in the definitions section -is going to adversely affect their functionality in some -counter-intuitive manner just because it comes first. Such an -organization is not possible using PROLOGUE sections. - - This section has been concerned with explaining the advantages of -the four PROLOGUE alternatives over the original Yacc PROLOGUE. -However, in most cases when using these directives, you shouldn't need -to think about all the low-level ordering issues discussed here. -Instead, you should simply use these directives to label each block of -your code according to its purpose and let Bison handle the ordering. -`%code' is the most generic label. Move code to `%code requires', -`%code provides', or `%code top' as needed. - - -File: bison.info, Node: Bison Declarations, Next: Grammar Rules, Prev: Prologue Alternatives, Up: Grammar Outline - -3.1.3 The Bison Declarations Section ------------------------------------- - -The BISON DECLARATIONS section contains declarations that define -terminal and nonterminal symbols, specify precedence, and so on. In -some simple grammars you may not need any declarations. *Note Bison -Declarations: Declarations. - - -File: bison.info, Node: Grammar Rules, Next: Epilogue, Prev: Bison Declarations, Up: Grammar Outline - -3.1.4 The Grammar Rules Section -------------------------------- - -The "grammar rules" section contains one or more Bison grammar rules, -and nothing else. *Note Syntax of Grammar Rules: Rules. - - There must always be at least one grammar rule, and the first `%%' -(which precedes the grammar rules) may never be omitted even if it is -the first thing in the file. - - -File: bison.info, Node: Epilogue, Prev: Grammar Rules, Up: Grammar Outline - -3.1.5 The epilogue ------------------- - -The EPILOGUE is copied verbatim to the end of the parser file, just as -the PROLOGUE is copied to the beginning. This is the most convenient -place to put anything that you want to have in the parser file but -which need not come before the definition of `yyparse'. For example, -the definitions of `yylex' and `yyerror' often go here. Because C -requires functions to be declared before being used, you often need to -declare functions like `yylex' and `yyerror' in the Prologue, even if -you define them in the Epilogue. *Note Parser C-Language Interface: -Interface. - - If the last section is empty, you may omit the `%%' that separates it -from the grammar rules. - - The Bison parser itself contains many macros and identifiers whose -names start with `yy' or `YY', so it is a good idea to avoid using any -such names (except those documented in this manual) in the epilogue of -the grammar file. - - -File: bison.info, Node: Symbols, Next: Rules, Prev: Grammar Outline, Up: Grammar File - -3.2 Symbols, Terminal and Nonterminal -===================================== - -"Symbols" in Bison grammars represent the grammatical classifications -of the language. - - A "terminal symbol" (also known as a "token type") represents a -class of syntactically equivalent tokens. You use the symbol in grammar -rules to mean that a token in that class is allowed. The symbol is -represented in the Bison parser by a numeric code, and the `yylex' -function returns a token type code to indicate what kind of token has -been read. You don't need to know what the code value is; you can use -the symbol to stand for it. - - A "nonterminal symbol" stands for a class of syntactically -equivalent groupings. The symbol name is used in writing grammar rules. -By convention, it should be all lower case. - - Symbol names can contain letters, digits (not at the beginning), -underscores and periods. Periods make sense only in nonterminals. - - There are three ways of writing terminal symbols in the grammar: - - * A "named token type" is written with an identifier, like an - identifier in C. By convention, it should be all upper case. Each - such name must be defined with a Bison declaration such as - `%token'. *Note Token Type Names: Token Decl. - - * A "character token type" (or "literal character token") is written - in the grammar using the same syntax used in C for character - constants; for example, `'+'' is a character token type. A - character token type doesn't need to be declared unless you need to - specify its semantic value data type (*note Data Types of Semantic - Values: Value Type.), associativity, or precedence (*note Operator - Precedence: Precedence.). - - By convention, a character token type is used only to represent a - token that consists of that particular character. Thus, the token - type `'+'' is used to represent the character `+' as a token. - Nothing enforces this convention, but if you depart from it, your - program will confuse other readers. - - All the usual escape sequences used in character literals in C can - be used in Bison as well, but you must not use the null character - as a character literal because its numeric code, zero, signifies - end-of-input (*note Calling Convention for `yylex': Calling - Convention.). Also, unlike standard C, trigraphs have no special - meaning in Bison character literals, nor is backslash-newline - allowed. - - * A "literal string token" is written like a C string constant; for - example, `"<="' is a literal string token. A literal string token - doesn't need to be declared unless you need to specify its semantic - value data type (*note Value Type::), associativity, or precedence - (*note Precedence::). - - You can associate the literal string token with a symbolic name as - an alias, using the `%token' declaration (*note Token - Declarations: Token Decl.). If you don't do that, the lexical - analyzer has to retrieve the token number for the literal string - token from the `yytname' table (*note Calling Convention::). - - *Warning*: literal string tokens do not work in Yacc. - - By convention, a literal string token is used only to represent a - token that consists of that particular string. Thus, you should - use the token type `"<="' to represent the string `<=' as a token. - Bison does not enforce this convention, but if you depart from - it, people who read your program will be confused. - - All the escape sequences used in string literals in C can be used - in Bison as well, except that you must not use a null character - within a string literal. Also, unlike Standard C, trigraphs have - no special meaning in Bison string literals, nor is - backslash-newline allowed. A literal string token must contain - two or more characters; for a token containing just one character, - use a character token (see above). - - How you choose to write a terminal symbol has no effect on its -grammatical meaning. That depends only on where it appears in rules and -on when the parser function returns that symbol. - - The value returned by `yylex' is always one of the terminal symbols, -except that a zero or negative value signifies end-of-input. Whichever -way you write the token type in the grammar rules, you write it the -same way in the definition of `yylex'. The numeric code for a -character token type is simply the positive numeric code of the -character, so `yylex' can use the identical value to generate the -requisite code, though you may need to convert it to `unsigned char' to -avoid sign-extension on hosts where `char' is signed. Each named token -type becomes a C macro in the parser file, so `yylex' can use the name -to stand for the code. (This is why periods don't make sense in -terminal symbols.) *Note Calling Convention for `yylex': Calling -Convention. - - If `yylex' is defined in a separate file, you need to arrange for the -token-type macro definitions to be available there. Use the `-d' -option when you run Bison, so that it will write these macro definitions -into a separate header file `NAME.tab.h' which you can include in the -other source files that need it. *Note Invoking Bison: Invocation. - - If you want to write a grammar that is portable to any Standard C -host, you must use only nonnull character tokens taken from the basic -execution character set of Standard C. This set consists of the ten -digits, the 52 lower- and upper-case English letters, and the -characters in the following C-language string: - - "\a\b\t\n\v\f\r !\"#%&'()*+,-./:;<=>?[\\]^_{|}~" - - The `yylex' function and Bison must use a consistent character set -and encoding for character tokens. For example, if you run Bison in an -ASCII environment, but then compile and run the resulting program in an -environment that uses an incompatible character set like EBCDIC, the -resulting program may not work because the tables generated by Bison -will assume ASCII numeric values for character tokens. It is standard -practice for software distributions to contain C source files that were -generated by Bison in an ASCII environment, so installers on platforms -that are incompatible with ASCII must rebuild those files before -compiling them. - - The symbol `error' is a terminal symbol reserved for error recovery -(*note Error Recovery::); you shouldn't use it for any other purpose. -In particular, `yylex' should never return this value. The default -value of the error token is 256, unless you explicitly assigned 256 to -one of your tokens with a `%token' declaration. - - -File: bison.info, Node: Rules, Next: Recursion, Prev: Symbols, Up: Grammar File - -3.3 Syntax of Grammar Rules -=========================== - -A Bison grammar rule has the following general form: - - RESULT: COMPONENTS... - ; - -where RESULT is the nonterminal symbol that this rule describes, and -COMPONENTS are various terminal and nonterminal symbols that are put -together by this rule (*note Symbols::). - - For example, - - exp: exp '+' exp - ; - -says that two groupings of type `exp', with a `+' token in between, can -be combined into a larger grouping of type `exp'. - - White space in rules is significant only to separate symbols. You -can add extra white space as you wish. - - Scattered among the components can be ACTIONS that determine the -semantics of the rule. An action looks like this: - - {C STATEMENTS} - -This is an example of "braced code", that is, C code surrounded by -braces, much like a compound statement in C. Braced code can contain -any sequence of C tokens, so long as its braces are balanced. Bison -does not check the braced code for correctness directly; it merely -copies the code to the output file, where the C compiler can check it. - - Within braced code, the balanced-brace count is not affected by -braces within comments, string literals, or character constants, but it -is affected by the C digraphs `<%' and `%>' that represent braces. At -the top level braced code must be terminated by `}' and not by a -digraph. Bison does not look for trigraphs, so if braced code uses -trigraphs you should ensure that they do not affect the nesting of -braces or the boundaries of comments, string literals, or character -constants. - - Usually there is only one action and it follows the components. -*Note Actions::. - - Multiple rules for the same RESULT can be written separately or can -be joined with the vertical-bar character `|' as follows: - - RESULT: RULE1-COMPONENTS... - | RULE2-COMPONENTS... - ... - ; - -They are still considered distinct rules even when joined in this way. - - If COMPONENTS in a rule is empty, it means that RESULT can match the -empty string. For example, here is how to define a comma-separated -sequence of zero or more `exp' groupings: - - expseq: /* empty */ - | expseq1 - ; - - expseq1: exp - | expseq1 ',' exp - ; - -It is customary to write a comment `/* empty */' in each rule with no -components. - - -File: bison.info, Node: Recursion, Next: Semantics, Prev: Rules, Up: Grammar File - -3.4 Recursive Rules -=================== - -A rule is called "recursive" when its RESULT nonterminal appears also -on its right hand side. Nearly all Bison grammars need to use -recursion, because that is the only way to define a sequence of any -number of a particular thing. Consider this recursive definition of a -comma-separated sequence of one or more expressions: - - expseq1: exp - | expseq1 ',' exp - ; - -Since the recursive use of `expseq1' is the leftmost symbol in the -right hand side, we call this "left recursion". By contrast, here the -same construct is defined using "right recursion": - - expseq1: exp - | exp ',' expseq1 - ; - -Any kind of sequence can be defined using either left recursion or right -recursion, but you should always use left recursion, because it can -parse a sequence of any number of elements with bounded stack space. -Right recursion uses up space on the Bison stack in proportion to the -number of elements in the sequence, because all the elements must be -shifted onto the stack before the rule can be applied even once. *Note -The Bison Parser Algorithm: Algorithm, for further explanation of this. - - "Indirect" or "mutual" recursion occurs when the result of the rule -does not appear directly on its right hand side, but does appear in -rules for other nonterminals which do appear on its right hand side. - - For example: - - expr: primary - | primary '+' primary - ; - - primary: constant - | '(' expr ')' - ; - -defines two mutually-recursive nonterminals, since each refers to the -other. - - -File: bison.info, Node: Semantics, Next: Locations, Prev: Recursion, Up: Grammar File - -3.5 Defining Language Semantics -=============================== - -The grammar rules for a language determine only the syntax. The -semantics are determined by the semantic values associated with various -tokens and groupings, and by the actions taken when various groupings -are recognized. - - For example, the calculator calculates properly because the value -associated with each expression is the proper number; it adds properly -because the action for the grouping `X + Y' is to add the numbers -associated with X and Y. - -* Menu: - -* Value Type:: Specifying one data type for all semantic values. -* Multiple Types:: Specifying several alternative data types. -* Actions:: An action is the semantic definition of a grammar rule. -* Action Types:: Specifying data types for actions to operate on. -* Mid-Rule Actions:: Most actions go at the end of a rule. - This says when, why and how to use the exceptional - action in the middle of a rule. - - -File: bison.info, Node: Value Type, Next: Multiple Types, Up: Semantics - -3.5.1 Data Types of Semantic Values ------------------------------------ - -In a simple program it may be sufficient to use the same data type for -the semantic values of all language constructs. This was true in the -RPN and infix calculator examples (*note Reverse Polish Notation -Calculator: RPN Calc.). - - Bison normally uses the type `int' for semantic values if your -program uses the same data type for all language constructs. To -specify some other type, define `YYSTYPE' as a macro, like this: - - #define YYSTYPE double - -`YYSTYPE''s replacement list should be a type name that does not -contain parentheses or square brackets. This macro definition must go -in the prologue of the grammar file (*note Outline of a Bison Grammar: -Grammar Outline.). - - -File: bison.info, Node: Multiple Types, Next: Actions, Prev: Value Type, Up: Semantics - -3.5.2 More Than One Value Type ------------------------------- - -In most programs, you will need different data types for different kinds -of tokens and groupings. For example, a numeric constant may need type -`int' or `long int', while a string constant needs type `char *', and -an identifier might need a pointer to an entry in the symbol table. - - To use more than one data type for semantic values in one parser, -Bison requires you to do two things: - - * Specify the entire collection of possible data types, either by - using the `%union' Bison declaration (*note The Collection of - Value Types: Union Decl.), or by using a `typedef' or a `#define' - to define `YYSTYPE' to be a union type whose member names are the - type tags. - - * Choose one of those types for each symbol (terminal or - nonterminal) for which semantic values are used. This is done for - tokens with the `%token' Bison declaration (*note Token Type - Names: Token Decl.) and for groupings with the `%type' Bison - declaration (*note Nonterminal Symbols: Type Decl.). - - -File: bison.info, Node: Actions, Next: Action Types, Prev: Multiple Types, Up: Semantics - -3.5.3 Actions -------------- - -An action accompanies a syntactic rule and contains C code to be -executed each time an instance of that rule is recognized. The task of -most actions is to compute a semantic value for the grouping built by -the rule from the semantic values associated with tokens or smaller -groupings. - - An action consists of braced code containing C statements, and can be -placed at any position in the rule; it is executed at that position. -Most rules have just one action at the end of the rule, following all -the components. Actions in the middle of a rule are tricky and used -only for special purposes (*note Actions in Mid-Rule: Mid-Rule -Actions.). - - The C code in an action can refer to the semantic values of the -components matched by the rule with the construct `$N', which stands for -the value of the Nth component. The semantic value for the grouping -being constructed is `$$'. Bison translates both of these constructs -into expressions of the appropriate type when it copies the actions -into the parser file. `$$' is translated to a modifiable lvalue, so it -can be assigned to. - - Here is a typical example: - - exp: ... - | exp '+' exp - { $$ = $1 + $3; } - -This rule constructs an `exp' from two smaller `exp' groupings -connected by a plus-sign token. In the action, `$1' and `$3' refer to -the semantic values of the two component `exp' groupings, which are the -first and third symbols on the right hand side of the rule. The sum is -stored into `$$' so that it becomes the semantic value of the -addition-expression just recognized by the rule. If there were a -useful semantic value associated with the `+' token, it could be -referred to as `$2'. - - Note that the vertical-bar character `|' is really a rule separator, -and actions are attached to a single rule. This is a difference with -tools like Flex, for which `|' stands for either "or", or "the same -action as that of the next rule". In the following example, the action -is triggered only when `b' is found: - - a-or-b: 'a'|'b' { a_or_b_found = 1; }; - - If you don't specify an action for a rule, Bison supplies a default: -`$$ = $1'. Thus, the value of the first symbol in the rule becomes the -value of the whole rule. Of course, the default action is valid only -if the two data types match. There is no meaningful default action for -an empty rule; every empty rule must have an explicit action unless the -rule's value does not matter. - - `$N' with N zero or negative is allowed for reference to tokens and -groupings on the stack _before_ those that match the current rule. -This is a very risky practice, and to use it reliably you must be -certain of the context in which the rule is applied. Here is a case in -which you can use this reliably: - - foo: expr bar '+' expr { ... } - | expr bar '-' expr { ... } - ; - - bar: /* empty */ - { previous_expr = $0; } - ; - - As long as `bar' is used only in the fashion shown here, `$0' always -refers to the `expr' which precedes `bar' in the definition of `foo'. - - It is also possible to access the semantic value of the lookahead -token, if any, from a semantic action. This semantic value is stored -in `yylval'. *Note Special Features for Use in Actions: Action -Features. - - -File: bison.info, Node: Action Types, Next: Mid-Rule Actions, Prev: Actions, Up: Semantics - -3.5.4 Data Types of Values in Actions -------------------------------------- - -If you have chosen a single data type for semantic values, the `$$' and -`$N' constructs always have that data type. - - If you have used `%union' to specify a variety of data types, then -you must declare a choice among these types for each terminal or -nonterminal symbol that can have a semantic value. Then each time you -use `$$' or `$N', its data type is determined by which symbol it refers -to in the rule. In this example, - - exp: ... - | exp '+' exp - { $$ = $1 + $3; } - -`$1' and `$3' refer to instances of `exp', so they all have the data -type declared for the nonterminal symbol `exp'. If `$2' were used, it -would have the data type declared for the terminal symbol `'+'', -whatever that might be. - - Alternatively, you can specify the data type when you refer to the -value, by inserting `<TYPE>' after the `$' at the beginning of the -reference. For example, if you have defined types as shown here: - - %union { - int itype; - double dtype; - } - -then you can write `$<itype>1' to refer to the first subunit of the -rule as an integer, or `$<dtype>1' to refer to it as a double. - - -File: bison.info, Node: Mid-Rule Actions, Prev: Action Types, Up: Semantics - -3.5.5 Actions in Mid-Rule -------------------------- - -Occasionally it is useful to put an action in the middle of a rule. -These actions are written just like usual end-of-rule actions, but they -are executed before the parser even recognizes the following components. - - A mid-rule action may refer to the components preceding it using -`$N', but it may not refer to subsequent components because it is run -before they are parsed. - - The mid-rule action itself counts as one of the components of the -rule. This makes a difference when there is another action later in -the same rule (and usually there is another at the end): you have to -count the actions along with the symbols when working out which number -N to use in `$N'. - - The mid-rule action can also have a semantic value. The action can -set its value with an assignment to `$$', and actions later in the rule -can refer to the value using `$N'. Since there is no symbol to name -the action, there is no way to declare a data type for the value in -advance, so you must use the `$<...>N' construct to specify a data type -each time you refer to this value. - - There is no way to set the value of the entire rule with a mid-rule -action, because assignments to `$$' do not have that effect. The only -way to set the value for the entire rule is with an ordinary action at -the end of the rule. - - Here is an example from a hypothetical compiler, handling a `let' -statement that looks like `let (VARIABLE) STATEMENT' and serves to -create a variable named VARIABLE temporarily for the duration of -STATEMENT. To parse this construct, we must put VARIABLE into the -symbol table while STATEMENT is parsed, then remove it afterward. Here -is how it is done: - - stmt: LET '(' var ')' - { $<context>$ = push_context (); - declare_variable ($3); } - stmt { $$ = $6; - pop_context ($<context>5); } - -As soon as `let (VARIABLE)' has been recognized, the first action is -run. It saves a copy of the current semantic context (the list of -accessible variables) as its semantic value, using alternative -`context' in the data-type union. Then it calls `declare_variable' to -add the new variable to that list. Once the first action is finished, -the embedded statement `stmt' can be parsed. Note that the mid-rule -action is component number 5, so the `stmt' is component number 6. - - After the embedded statement is parsed, its semantic value becomes -the value of the entire `let'-statement. Then the semantic value from -the earlier action is used to restore the prior list of variables. This -removes the temporary `let'-variable from the list so that it won't -appear to exist while the rest of the program is parsed. - - In the above example, if the parser initiates error recovery (*note -Error Recovery::) while parsing the tokens in the embedded statement -`stmt', it might discard the previous semantic context `$<context>5' -without restoring it. Thus, `$<context>5' needs a destructor (*note -Freeing Discarded Symbols: Destructor Decl.). However, Bison currently -provides no means to declare a destructor specific to a particular -mid-rule action's semantic value. - - One solution is to bury the mid-rule action inside a nonterminal -symbol and to declare a destructor for that symbol: - - %type <context> let - %destructor { pop_context ($$); } let - - %% - - stmt: let stmt - { $$ = $2; - pop_context ($1); } - ; - - let: LET '(' var ')' - { $$ = push_context (); - declare_variable ($3); } - ; - -Note that the action is now at the end of its rule. Any mid-rule -action can be converted to an end-of-rule action in this way, and this -is what Bison actually does to implement mid-rule actions. - - Taking action before a rule is completely recognized often leads to -conflicts since the parser must commit to a parse in order to execute -the action. For example, the following two rules, without mid-rule -actions, can coexist in a working parser because the parser can shift -the open-brace token and look at what follows before deciding whether -there is a declaration or not: - - compound: '{' declarations statements '}' - | '{' statements '}' - ; - -But when we add a mid-rule action as follows, the rules become -nonfunctional: - - compound: { prepare_for_local_variables (); } - '{' declarations statements '}' - | '{' statements '}' - ; - -Now the parser is forced to decide whether to run the mid-rule action -when it has read no farther than the open-brace. In other words, it -must commit to using one rule or the other, without sufficient -information to do it correctly. (The open-brace token is what is called -the "lookahead" token at this time, since the parser is still deciding -what to do about it. *Note Lookahead Tokens: Lookahead.) - - You might think that you could correct the problem by putting -identical actions into the two rules, like this: - - compound: { prepare_for_local_variables (); } - '{' declarations statements '}' - | { prepare_for_local_variables (); } - '{' statements '}' - ; - -But this does not help, because Bison does not realize that the two -actions are identical. (Bison never tries to understand the C code in -an action.) - - If the grammar is such that a declaration can be distinguished from a -statement by the first token (which is true in C), then one solution -which does work is to put the action after the open-brace, like this: - - compound: '{' { prepare_for_local_variables (); } - declarations statements '}' - | '{' statements '}' - ; - -Now the first token of the following declaration or statement, which -would in any case tell Bison which rule to use, can still do so. - - Another solution is to bury the action inside a nonterminal symbol -which serves as a subroutine: - - subroutine: /* empty */ - { prepare_for_local_variables (); } - ; - - compound: subroutine - '{' declarations statements '}' - | subroutine - '{' statements '}' - ; - -Now Bison can execute the action in the rule for `subroutine' without -deciding which rule for `compound' it will eventually use. - - -File: bison.info, Node: Locations, Next: Declarations, Prev: Semantics, Up: Grammar File - -3.6 Tracking Locations -====================== - -Though grammar rules and semantic actions are enough to write a fully -functional parser, it can be useful to process some additional -information, especially symbol locations. - - The way locations are handled is defined by providing a data type, -and actions to take when rules are matched. - -* Menu: - -* Location Type:: Specifying a data type for locations. -* Actions and Locations:: Using locations in actions. -* Location Default Action:: Defining a general way to compute locations. - - -File: bison.info, Node: Location Type, Next: Actions and Locations, Up: Locations - -3.6.1 Data Type of Locations ----------------------------- - -Defining a data type for locations is much simpler than for semantic -values, since all tokens and groupings always use the same type. - - You can specify the type of locations by defining a macro called -`YYLTYPE', just as you can specify the semantic value type by defining -a `YYSTYPE' macro (*note Value Type::). When `YYLTYPE' is not defined, -Bison uses a default structure type with four members: - - typedef struct YYLTYPE - { - int first_line; - int first_column; - int last_line; - int last_column; - } YYLTYPE; - - At the beginning of the parsing, Bison initializes all these fields -to 1 for `yylloc'. - - -File: bison.info, Node: Actions and Locations, Next: Location Default Action, Prev: Location Type, Up: Locations - -3.6.2 Actions and Locations ---------------------------- - -Actions are not only useful for defining language semantics, but also -for describing the behavior of the output parser with locations. - - The most obvious way for building locations of syntactic groupings -is very similar to the way semantic values are computed. In a given -rule, several constructs can be used to access the locations of the -elements being matched. The location of the Nth component of the right -hand side is `@N', while the location of the left hand side grouping is -`@$'. - - Here is a basic example using the default data type for locations: - - exp: ... - | exp '/' exp - { - @$.first_column = @1.first_column; - @$.first_line = @1.first_line; - @$.last_column = @3.last_column; - @$.last_line = @3.last_line; - if ($3) - $$ = $1 / $3; - else - { - $$ = 1; - fprintf (stderr, - "Division by zero, l%d,c%d-l%d,c%d", - @3.first_line, @3.first_column, - @3.last_line, @3.last_column); - } - } - - As for semantic values, there is a default action for locations that -is run each time a rule is matched. It sets the beginning of `@$' to -the beginning of the first symbol, and the end of `@$' to the end of the -last symbol. - - With this default action, the location tracking can be fully -automatic. The example above simply rewrites this way: - - exp: ... - | exp '/' exp - { - if ($3) - $$ = $1 / $3; - else - { - $$ = 1; - fprintf (stderr, - "Division by zero, l%d,c%d-l%d,c%d", - @3.first_line, @3.first_column, - @3.last_line, @3.last_column); - } - } - - It is also possible to access the location of the lookahead token, -if any, from a semantic action. This location is stored in `yylloc'. -*Note Special Features for Use in Actions: Action Features. - - -File: bison.info, Node: Location Default Action, Prev: Actions and Locations, Up: Locations - -3.6.3 Default Action for Locations ----------------------------------- - -Actually, actions are not the best place to compute locations. Since -locations are much more general than semantic values, there is room in -the output parser to redefine the default action to take for each rule. -The `YYLLOC_DEFAULT' macro is invoked each time a rule is matched, -before the associated action is run. It is also invoked while -processing a syntax error, to compute the error's location. Before -reporting an unresolvable syntactic ambiguity, a GLR parser invokes -`YYLLOC_DEFAULT' recursively to compute the location of that ambiguity. - - Most of the time, this macro is general enough to suppress location -dedicated code from semantic actions. - - The `YYLLOC_DEFAULT' macro takes three parameters. The first one is -the location of the grouping (the result of the computation). When a -rule is matched, the second parameter identifies locations of all right -hand side elements of the rule being matched, and the third parameter -is the size of the rule's right hand side. When a GLR parser reports -an ambiguity, which of multiple candidate right hand sides it passes to -`YYLLOC_DEFAULT' is undefined. When processing a syntax error, the -second parameter identifies locations of the symbols that were -discarded during error processing, and the third parameter is the -number of discarded symbols. - - By default, `YYLLOC_DEFAULT' is defined this way: - - # define YYLLOC_DEFAULT(Current, Rhs, N) \ - do \ - if (N) \ - { \ - (Current).first_line = YYRHSLOC(Rhs, 1).first_line; \ - (Current).first_column = YYRHSLOC(Rhs, 1).first_column; \ - (Current).last_line = YYRHSLOC(Rhs, N).last_line; \ - (Current).last_column = YYRHSLOC(Rhs, N).last_column; \ - } \ - else \ - { \ - (Current).first_line = (Current).last_line = \ - YYRHSLOC(Rhs, 0).last_line; \ - (Current).first_column = (Current).last_column = \ - YYRHSLOC(Rhs, 0).last_column; \ - } \ - while (0) - - where `YYRHSLOC (rhs, k)' is the location of the Kth symbol in RHS -when K is positive, and the location of the symbol just before the -reduction when K and N are both zero. - - When defining `YYLLOC_DEFAULT', you should consider that: - - * All arguments are free of side-effects. However, only the first - one (the result) should be modified by `YYLLOC_DEFAULT'. - - * For consistency with semantic actions, valid indexes within the - right hand side range from 1 to N. When N is zero, only 0 is a - valid index, and it refers to the symbol just before the reduction. - During error processing N is always positive. - - * Your macro should parenthesize its arguments, if need be, since the - actual arguments may not be surrounded by parentheses. Also, your - macro should expand to something that can be used as a single - statement when it is followed by a semicolon. - - -File: bison.info, Node: Declarations, Next: Multiple Parsers, Prev: Locations, Up: Grammar File - -3.7 Bison Declarations -====================== - -The "Bison declarations" section of a Bison grammar defines the symbols -used in formulating the grammar and the data types of semantic values. -*Note Symbols::. - - All token type names (but not single-character literal tokens such as -`'+'' and `'*'') must be declared. Nonterminal symbols must be -declared if you need to specify which data type to use for the semantic -value (*note More Than One Value Type: Multiple Types.). - - The first rule in the file also specifies the start symbol, by -default. If you want some other symbol to be the start symbol, you -must declare it explicitly (*note Languages and Context-Free Grammars: -Language and Grammar.). - -* Menu: - -* Require Decl:: Requiring a Bison version. -* Token Decl:: Declaring terminal symbols. -* Precedence Decl:: Declaring terminals with precedence and associativity. -* Union Decl:: Declaring the set of all semantic value types. -* Type Decl:: Declaring the choice of type for a nonterminal symbol. -* Initial Action Decl:: Code run before parsing starts. -* Destructor Decl:: Declaring how symbols are freed. -* Expect Decl:: Suppressing warnings about parsing conflicts. -* Start Decl:: Specifying the start symbol. -* Pure Decl:: Requesting a reentrant parser. -* Push Decl:: Requesting a push parser. -* Decl Summary:: Table of all Bison declarations. - - -File: bison.info, Node: Require Decl, Next: Token Decl, Up: Declarations - -3.7.1 Require a Version of Bison --------------------------------- - -You may require the minimum version of Bison to process the grammar. If -the requirement is not met, `bison' exits with an error (exit status -63). - - %require "VERSION" - - -File: bison.info, Node: Token Decl, Next: Precedence Decl, Prev: Require Decl, Up: Declarations - -3.7.2 Token Type Names ----------------------- - -The basic way to declare a token type name (terminal symbol) is as -follows: - - %token NAME - - Bison will convert this into a `#define' directive in the parser, so -that the function `yylex' (if it is in this file) can use the name NAME -to stand for this token type's code. - - Alternatively, you can use `%left', `%right', or `%nonassoc' instead -of `%token', if you wish to specify associativity and precedence. -*Note Operator Precedence: Precedence Decl. - - You can explicitly specify the numeric code for a token type by -appending a nonnegative decimal or hexadecimal integer value in the -field immediately following the token name: - - %token NUM 300 - %token XNUM 0x12d // a GNU extension - -It is generally best, however, to let Bison choose the numeric codes for -all token types. Bison will automatically select codes that don't -conflict with each other or with normal characters. - - In the event that the stack type is a union, you must augment the -`%token' or other token declaration to include the data type -alternative delimited by angle-brackets (*note More Than One Value -Type: Multiple Types.). - - For example: - - %union { /* define stack type */ - double val; - symrec *tptr; - } - %token <val> NUM /* define token NUM and its type */ - - You can associate a literal string token with a token type name by -writing the literal string at the end of a `%token' declaration which -declares the name. For example: - - %token arrow "=>" - -For example, a grammar for the C language might specify these names with -equivalent literal string tokens: - - %token <operator> OR "||" - %token <operator> LE 134 "<=" - %left OR "<=" - -Once you equate the literal string and the token name, you can use them -interchangeably in further declarations or the grammar rules. The -`yylex' function can use the token name or the literal string to obtain -the token type code number (*note Calling Convention::). Syntax error -messages passed to `yyerror' from the parser will reference the literal -string instead of the token name. - - The token numbered as 0 corresponds to end of file; the following -line allows for nicer error messages referring to "end of file" instead -of "$end": - - %token END 0 "end of file" - - -File: bison.info, Node: Precedence Decl, Next: Union Decl, Prev: Token Decl, Up: Declarations - -3.7.3 Operator Precedence -------------------------- - -Use the `%left', `%right' or `%nonassoc' declaration to declare a token -and specify its precedence and associativity, all at once. These are -called "precedence declarations". *Note Operator Precedence: -Precedence, for general information on operator precedence. - - The syntax of a precedence declaration is nearly the same as that of -`%token': either - - %left SYMBOLS... - -or - - %left <TYPE> SYMBOLS... - - And indeed any of these declarations serves the purposes of `%token'. -But in addition, they specify the associativity and relative precedence -for all the SYMBOLS: - - * The associativity of an operator OP determines how repeated uses - of the operator nest: whether `X OP Y OP Z' is parsed by grouping - X with Y first or by grouping Y with Z first. `%left' specifies - left-associativity (grouping X with Y first) and `%right' - specifies right-associativity (grouping Y with Z first). - `%nonassoc' specifies no associativity, which means that `X OP Y - OP Z' is considered a syntax error. - - * The precedence of an operator determines how it nests with other - operators. All the tokens declared in a single precedence - declaration have equal precedence and nest together according to - their associativity. When two tokens declared in different - precedence declarations associate, the one declared later has the - higher precedence and is grouped first. - - For backward compatibility, there is a confusing difference between -the argument lists of `%token' and precedence declarations. Only a -`%token' can associate a literal string with a token type name. A -precedence declaration always interprets a literal string as a -reference to a separate token. For example: - - %left OR "<=" // Does not declare an alias. - %left OR 134 "<=" 135 // Declares 134 for OR and 135 for "<=". - - -File: bison.info, Node: Union Decl, Next: Type Decl, Prev: Precedence Decl, Up: Declarations - -3.7.4 The Collection of Value Types ------------------------------------ - -The `%union' declaration specifies the entire collection of possible -data types for semantic values. The keyword `%union' is followed by -braced code containing the same thing that goes inside a `union' in C. - - For example: - - %union { - double val; - symrec *tptr; - } - -This says that the two alternative types are `double' and `symrec *'. -They are given names `val' and `tptr'; these names are used in the -`%token' and `%type' declarations to pick one of the types for a -terminal or nonterminal symbol (*note Nonterminal Symbols: Type Decl.). - - As an extension to POSIX, a tag is allowed after the `union'. For -example: - - %union value { - double val; - symrec *tptr; - } - -specifies the union tag `value', so the corresponding C type is `union -value'. If you do not specify a tag, it defaults to `YYSTYPE'. - - As another extension to POSIX, you may specify multiple `%union' -declarations; their contents are concatenated. However, only the first -`%union' declaration can specify a tag. - - Note that, unlike making a `union' declaration in C, you need not -write a semicolon after the closing brace. - - Instead of `%union', you can define and use your own union type -`YYSTYPE' if your grammar contains at least one `<TYPE>' tag. For -example, you can put the following into a header file `parser.h': - - union YYSTYPE { - double val; - symrec *tptr; - }; - typedef union YYSTYPE YYSTYPE; - -and then your grammar can use the following instead of `%union': - - %{ - #include "parser.h" - %} - %type <val> expr - %token <tptr> ID - - -File: bison.info, Node: Type Decl, Next: Initial Action Decl, Prev: Union Decl, Up: Declarations - -3.7.5 Nonterminal Symbols -------------------------- - -When you use `%union' to specify multiple value types, you must declare -the value type of each nonterminal symbol for which values are used. -This is done with a `%type' declaration, like this: - - %type <TYPE> NONTERMINAL... - -Here NONTERMINAL is the name of a nonterminal symbol, and TYPE is the -name given in the `%union' to the alternative that you want (*note The -Collection of Value Types: Union Decl.). You can give any number of -nonterminal symbols in the same `%type' declaration, if they have the -same value type. Use spaces to separate the symbol names. - - You can also declare the value type of a terminal symbol. To do -this, use the same `<TYPE>' construction in a declaration for the -terminal symbol. All kinds of token declarations allow `<TYPE>'. - - -File: bison.info, Node: Initial Action Decl, Next: Destructor Decl, Prev: Type Decl, Up: Declarations - -3.7.6 Performing Actions before Parsing ---------------------------------------- - -Sometimes your parser needs to perform some initializations before -parsing. The `%initial-action' directive allows for such arbitrary -code. - - -- Directive: %initial-action { CODE } - Declare that the braced CODE must be invoked before parsing each - time `yyparse' is called. The CODE may use `$$' and `@$' -- - initial value and location of the lookahead -- and the - `%parse-param'. - - For instance, if your locations use a file name, you may use - - %parse-param { char const *file_name }; - %initial-action - { - @$.initialize (file_name); - }; - - -File: bison.info, Node: Destructor Decl, Next: Expect Decl, Prev: Initial Action Decl, Up: Declarations - -3.7.7 Freeing Discarded Symbols -------------------------------- - -During error recovery (*note Error Recovery::), symbols already pushed -on the stack and tokens coming from the rest of the file are discarded -until the parser falls on its feet. If the parser runs out of memory, -or if it returns via `YYABORT' or `YYACCEPT', all the symbols on the -stack must be discarded. Even if the parser succeeds, it must discard -the start symbol. - - When discarded symbols convey heap based information, this memory is -lost. While this behavior can be tolerable for batch parsers, such as -in traditional compilers, it is unacceptable for programs like shells or -protocol implementations that may parse and execute indefinitely. - - The `%destructor' directive defines code that is called when a -symbol is automatically discarded. - - -- Directive: %destructor { CODE } SYMBOLS - Invoke the braced CODE whenever the parser discards one of the - SYMBOLS. Within CODE, `$$' designates the semantic value - associated with the discarded symbol, and `@$' designates its - location. The additional parser parameters are also available - (*note The Parser Function `yyparse': Parser Function.). - - When a symbol is listed among SYMBOLS, its `%destructor' is called - a per-symbol `%destructor'. You may also define a per-type - `%destructor' by listing a semantic type tag among SYMBOLS. In - that case, the parser will invoke this CODE whenever it discards - any grammar symbol that has that semantic type tag unless that - symbol has its own per-symbol `%destructor'. - - Finally, you can define two different kinds of default - `%destructor's. (These default forms are experimental. More user - feedback will help to determine whether they should become - permanent features.) You can place each of `<*>' and `<>' in the - SYMBOLS list of exactly one `%destructor' declaration in your - grammar file. The parser will invoke the CODE associated with one - of these whenever it discards any user-defined grammar symbol that - has no per-symbol and no per-type `%destructor'. The parser uses - the CODE for `<*>' in the case of such a grammar symbol for which - you have formally declared a semantic type tag (`%type' counts as - such a declaration, but `$<tag>$' does not). The parser uses the - CODE for `<>' in the case of such a grammar symbol that has no - declared semantic type tag. - -For example: - - %union { char *string; } - %token <string> STRING1 - %token <string> STRING2 - %type <string> string1 - %type <string> string2 - %union { char character; } - %token <character> CHR - %type <character> chr - %token TAGLESS - - %destructor { } <character> - %destructor { free ($$); } <*> - %destructor { free ($$); printf ("%d", @$.first_line); } STRING1 string1 - %destructor { printf ("Discarding tagless symbol.\n"); } <> - -guarantees that, when the parser discards any user-defined symbol that -has a semantic type tag other than `<character>', it passes its -semantic value to `free' by default. However, when the parser discards -a `STRING1' or a `string1', it also prints its line number to `stdout'. -It performs only the second `%destructor' in this case, so it invokes -`free' only once. Finally, the parser merely prints a message whenever -it discards any symbol, such as `TAGLESS', that has no semantic type -tag. - - A Bison-generated parser invokes the default `%destructor's only for -user-defined as opposed to Bison-defined symbols. For example, the -parser will not invoke either kind of default `%destructor' for the -special Bison-defined symbols `$accept', `$undefined', or `$end' (*note -Bison Symbols: Table of Symbols.), none of which you can reference in -your grammar. It also will not invoke either for the `error' token -(*note error: Table of Symbols.), which is always defined by Bison -regardless of whether you reference it in your grammar. However, it -may invoke one of them for the end token (token 0) if you redefine it -from `$end' to, for example, `END': - - %token END 0 - - Finally, Bison will never invoke a `%destructor' for an unreferenced -mid-rule semantic value (*note Actions in Mid-Rule: Mid-Rule Actions.). -That is, Bison does not consider a mid-rule to have a semantic value if -you do not reference `$$' in the mid-rule's action or `$N' (where N is -the RHS symbol position of the mid-rule) in any later action in that -rule. However, if you do reference either, the Bison-generated parser -will invoke the `<>' `%destructor' whenever it discards the mid-rule -symbol. - - - "Discarded symbols" are the following: - - * stacked symbols popped during the first phase of error recovery, - - * incoming terminals during the second phase of error recovery, - - * the current lookahead and the entire stack (except the current - right-hand side symbols) when the parser returns immediately, and - - * the start symbol, when the parser succeeds. - - The parser can "return immediately" because of an explicit call to -`YYABORT' or `YYACCEPT', or failed error recovery, or memory exhaustion. - - Right-hand side symbols of a rule that explicitly triggers a syntax -error via `YYERROR' are not discarded automatically. As a rule of -thumb, destructors are invoked only when user actions cannot manage the -memory. - - -File: bison.info, Node: Expect Decl, Next: Start Decl, Prev: Destructor Decl, Up: Declarations - -3.7.8 Suppressing Conflict Warnings ------------------------------------ - -Bison normally warns if there are any conflicts in the grammar (*note -Shift/Reduce Conflicts: Shift/Reduce.), but most real grammars have -harmless shift/reduce conflicts which are resolved in a predictable way -and would be difficult to eliminate. It is desirable to suppress the -warning about these conflicts unless the number of conflicts changes. -You can do this with the `%expect' declaration. - - The declaration looks like this: - - %expect N - - Here N is a decimal integer. The declaration says there should be N -shift/reduce conflicts and no reduce/reduce conflicts. Bison reports -an error if the number of shift/reduce conflicts differs from N, or if -there are any reduce/reduce conflicts. - - For normal LALR(1) parsers, reduce/reduce conflicts are more -serious, and should be eliminated entirely. Bison will always report -reduce/reduce conflicts for these parsers. With GLR parsers, however, -both kinds of conflicts are routine; otherwise, there would be no need -to use GLR parsing. Therefore, it is also possible to specify an -expected number of reduce/reduce conflicts in GLR parsers, using the -declaration: - - %expect-rr N - - In general, using `%expect' involves these steps: - - * Compile your grammar without `%expect'. Use the `-v' option to - get a verbose list of where the conflicts occur. Bison will also - print the number of conflicts. - - * Check each of the conflicts to make sure that Bison's default - resolution is what you really want. If not, rewrite the grammar - and go back to the beginning. - - * Add an `%expect' declaration, copying the number N from the number - which Bison printed. With GLR parsers, add an `%expect-rr' - declaration as well. - - Now Bison will warn you if you introduce an unexpected conflict, but -will keep silent otherwise. - - -File: bison.info, Node: Start Decl, Next: Pure Decl, Prev: Expect Decl, Up: Declarations - -3.7.9 The Start-Symbol ----------------------- - -Bison assumes by default that the start symbol for the grammar is the -first nonterminal specified in the grammar specification section. The -programmer may override this restriction with the `%start' declaration -as follows: - - %start SYMBOL - - -File: bison.info, Node: Pure Decl, Next: Push Decl, Prev: Start Decl, Up: Declarations - -3.7.10 A Pure (Reentrant) Parser --------------------------------- - -A "reentrant" program is one which does not alter in the course of -execution; in other words, it consists entirely of "pure" (read-only) -code. Reentrancy is important whenever asynchronous execution is -possible; for example, a nonreentrant program may not be safe to call -from a signal handler. In systems with multiple threads of control, a -nonreentrant program must be called only within interlocks. - - Normally, Bison generates a parser which is not reentrant. This is -suitable for most uses, and it permits compatibility with Yacc. (The -standard Yacc interfaces are inherently nonreentrant, because they use -statically allocated variables for communication with `yylex', -including `yylval' and `yylloc'.) - - Alternatively, you can generate a pure, reentrant parser. The Bison -declaration `%define api.pure' says that you want the parser to be -reentrant. It looks like this: - - %define api.pure - - The result is that the communication variables `yylval' and `yylloc' -become local variables in `yyparse', and a different calling convention -is used for the lexical analyzer function `yylex'. *Note Calling -Conventions for Pure Parsers: Pure Calling, for the details of this. -The variable `yynerrs' becomes local in `yyparse' in pull mode but it -becomes a member of yypstate in push mode. (*note The Error Reporting -Function `yyerror': Error Reporting.). The convention for calling -`yyparse' itself is unchanged. - - Whether the parser is pure has nothing to do with the grammar rules. -You can generate either a pure parser or a nonreentrant parser from any -valid grammar. - - -File: bison.info, Node: Push Decl, Next: Decl Summary, Prev: Pure Decl, Up: Declarations - -3.7.11 A Push Parser --------------------- - -(The current push parsing interface is experimental and may evolve. -More user feedback will help to stabilize it.) - - A pull parser is called once and it takes control until all its input -is completely parsed. A push parser, on the other hand, is called each -time a new token is made available. - - A push parser is typically useful when the parser is part of a main -event loop in the client's application. This is typically a -requirement of a GUI, when the main event loop needs to be triggered -within a certain time period. - - Normally, Bison generates a pull parser. The following Bison -declaration says that you want the parser to be a push parser (*note -%define api.push_pull: Decl Summary.): - - %define api.push_pull "push" - - In almost all cases, you want to ensure that your push parser is also -a pure parser (*note A Pure (Reentrant) Parser: Pure Decl.). The only -time you should create an impure push parser is to have backwards -compatibility with the impure Yacc pull mode interface. Unless you know -what you are doing, your declarations should look like this: - - %define api.pure - %define api.push_pull "push" - - There is a major notable functional difference between the pure push -parser and the impure push parser. It is acceptable for a pure push -parser to have many parser instances, of the same type of parser, in -memory at the same time. An impure push parser should only use one -parser at a time. - - When a push parser is selected, Bison will generate some new symbols -in the generated parser. `yypstate' is a structure that the generated -parser uses to store the parser's state. `yypstate_new' is the -function that will create a new parser instance. `yypstate_delete' -will free the resources associated with the corresponding parser -instance. Finally, `yypush_parse' is the function that should be -called whenever a token is available to provide the parser. A trivial -example of using a pure push parser would look like this: - - int status; - yypstate *ps = yypstate_new (); - do { - status = yypush_parse (ps, yylex (), NULL); - } while (status == YYPUSH_MORE); - yypstate_delete (ps); - - If the user decided to use an impure push parser, a few things about -the generated parser will change. The `yychar' variable becomes a -global variable instead of a variable in the `yypush_parse' function. -For this reason, the signature of the `yypush_parse' function is -changed to remove the token as a parameter. A nonreentrant push parser -example would thus look like this: - - extern int yychar; - int status; - yypstate *ps = yypstate_new (); - do { - yychar = yylex (); - status = yypush_parse (ps); - } while (status == YYPUSH_MORE); - yypstate_delete (ps); - - That's it. Notice the next token is put into the global variable -`yychar' for use by the next invocation of the `yypush_parse' function. - - Bison also supports both the push parser interface along with the -pull parser interface in the same generated parser. In order to get -this functionality, you should replace the `%define api.push_pull -"push"' declaration with the `%define api.push_pull "both"' -declaration. Doing this will create all of the symbols mentioned -earlier along with the two extra symbols, `yyparse' and `yypull_parse'. -`yyparse' can be used exactly as it normally would be used. However, -the user should note that it is implemented in the generated parser by -calling `yypull_parse'. This makes the `yyparse' function that is -generated with the `%define api.push_pull "both"' declaration slower -than the normal `yyparse' function. If the user calls the -`yypull_parse' function it will parse the rest of the input stream. It -is possible to `yypush_parse' tokens to select a subgrammar and then -`yypull_parse' the rest of the input stream. If you would like to -switch back and forth between between parsing styles, you would have to -write your own `yypull_parse' function that knows when to quit looking -for input. An example of using the `yypull_parse' function would look -like this: - - yypstate *ps = yypstate_new (); - yypull_parse (ps); /* Will call the lexer */ - yypstate_delete (ps); - - Adding the `%define api.pure' declaration does exactly the same -thing to the generated parser with `%define api.push_pull "both"' as it -did for `%define api.push_pull "push"'. - - -File: bison.info, Node: Decl Summary, Prev: Push Decl, Up: Declarations - -3.7.12 Bison Declaration Summary --------------------------------- - -Here is a summary of the declarations used to define a grammar: - - -- Directive: %union - Declare the collection of data types that semantic values may have - (*note The Collection of Value Types: Union Decl.). - - -- Directive: %token - Declare a terminal symbol (token type name) with no precedence or - associativity specified (*note Token Type Names: Token Decl.). - - -- Directive: %right - Declare a terminal symbol (token type name) that is - right-associative (*note Operator Precedence: Precedence Decl.). - - -- Directive: %left - Declare a terminal symbol (token type name) that is - left-associative (*note Operator Precedence: Precedence Decl.). - - -- Directive: %nonassoc - Declare a terminal symbol (token type name) that is nonassociative - (*note Operator Precedence: Precedence Decl.). Using it in a way - that would be associative is a syntax error. - - -- Directive: %type - Declare the type of semantic values for a nonterminal symbol - (*note Nonterminal Symbols: Type Decl.). - - -- Directive: %start - Specify the grammar's start symbol (*note The Start-Symbol: Start - Decl.). - - -- Directive: %expect - Declare the expected number of shift-reduce conflicts (*note - Suppressing Conflict Warnings: Expect Decl.). - - -In order to change the behavior of `bison', use the following -directives: - - -- Directive: %code {CODE} - This is the unqualified form of the `%code' directive. It inserts - CODE verbatim at a language-dependent default location in the - output(1). - - For C/C++, the default location is the parser source code file - after the usual contents of the parser header file. Thus, `%code' - replaces the traditional Yacc prologue, `%{CODE%}', for most - purposes. For a detailed discussion, see *Note Prologue - Alternatives::. - - For Java, the default location is inside the parser class. - - (Like all the Yacc prologue alternatives, this directive is - experimental. More user feedback will help to determine whether - it should become a permanent feature.) - - -- Directive: %code QUALIFIER {CODE} - This is the qualified form of the `%code' directive. If you need - to specify location-sensitive verbatim CODE that does not belong - at the default location selected by the unqualified `%code' form, - use this form instead. - - QUALIFIER identifies the purpose of CODE and thus the location(s) - where Bison should generate it. Not all values of QUALIFIER are - available for all target languages: - - * requires - - * Language(s): C, C++ - - * Purpose: This is the best place to write dependency code - required for `YYSTYPE' and `YYLTYPE'. In other words, - it's the best place to define types referenced in - `%union' directives, and it's the best place to override - Bison's default `YYSTYPE' and `YYLTYPE' definitions. - - * Location(s): The parser header file and the parser - source code file before the Bison-generated `YYSTYPE' - and `YYLTYPE' definitions. - - * provides - - * Language(s): C, C++ - - * Purpose: This is the best place to write additional - definitions and declarations that should be provided to - other modules. - - * Location(s): The parser header file and the parser - source code file after the Bison-generated `YYSTYPE', - `YYLTYPE', and token definitions. - - * top - - * Language(s): C, C++ - - * Purpose: The unqualified `%code' or `%code requires' - should usually be more appropriate than `%code top'. - However, occasionally it is necessary to insert code - much nearer the top of the parser source code file. For - example: - - %code top { - #define _GNU_SOURCE - #include <stdio.h> - } - - * Location(s): Near the top of the parser source code file. - - * imports - - * Language(s): Java - - * Purpose: This is the best place to write Java import - directives. - - * Location(s): The parser Java file after any Java package - directive and before any class definitions. - - (Like all the Yacc prologue alternatives, this directive is - experimental. More user feedback will help to determine whether - it should become a permanent feature.) - - For a detailed discussion of how to use `%code' in place of the - traditional Yacc prologue for C/C++, see *Note Prologue - Alternatives::. - - -- Directive: %debug - In the parser file, define the macro `YYDEBUG' to 1 if it is not - already defined, so that the debugging facilities are compiled. - *Note Tracing Your Parser: Tracing. - - -- Directive: %define VARIABLE - -- Directive: %define VARIABLE "VALUE" - Define a variable to adjust Bison's behavior. The possible - choices for VARIABLE, as well as their meanings, depend on the - selected target language and/or the parser skeleton (*note - %language: Decl Summary, *note %skeleton: Decl Summary.). - - Bison will warn if a VARIABLE is defined multiple times. - - Omitting `"VALUE"' is always equivalent to specifying it as `""'. - - Some VARIABLEs may be used as Booleans. In this case, Bison will - complain if the variable definition does not meet one of the - following four conditions: - - 1. `"VALUE"' is `"true"' - - 2. `"VALUE"' is omitted (or is `""'). This is equivalent to - `"true"'. - - 3. `"VALUE"' is `"false"'. - - 4. VARIABLE is never defined. In this case, Bison selects a - default value, which may depend on the selected target - language and/or parser skeleton. - - Some of the accepted VARIABLEs are: - - * api.pure - - * Language(s): C - - * Purpose: Request a pure (reentrant) parser program. - *Note A Pure (Reentrant) Parser: Pure Decl. - - * Accepted Values: Boolean - - * Default Value: `"false"' - - * api.push_pull - - * Language(s): C (LALR(1) only) - - * Purpose: Requests a pull parser, a push parser, or both. - *Note A Push Parser: Push Decl. (The current push - parsing interface is experimental and may evolve. More - user feedback will help to stabilize it.) - - * Accepted Values: `"pull"', `"push"', `"both"' - - * Default Value: `"pull"' - - * lr.keep_unreachable_states - - * Language(s): all - - * Purpose: Requests that Bison allow unreachable parser - states to remain in the parser tables. Bison considers - a state to be unreachable if there exists no sequence of - transitions from the start state to that state. A state - can become unreachable during conflict resolution if - Bison disables a shift action leading to it from a - predecessor state. Keeping unreachable states is - sometimes useful for analysis purposes, but they are - useless in the generated parser. - - * Accepted Values: Boolean - - * Default Value: `"false"' - - * Caveats: - - * Unreachable states may contain conflicts and may - use rules not used in any other state. Thus, - keeping unreachable states may induce warnings that - are irrelevant to your parser's behavior, and it - may eliminate warnings that are relevant. Of - course, the change in warnings may actually be - relevant to a parser table analysis that wants to - keep unreachable states, so this behavior will - likely remain in future Bison releases. - - * While Bison is able to remove unreachable states, - it is not guaranteed to remove other kinds of - useless states. Specifically, when Bison disables - reduce actions during conflict resolution, some - goto actions may become useless, and thus some - additional states may become useless. If Bison - were to compute which goto actions were useless and - then disable those actions, it could identify such - states as unreachable and then remove those states. - However, Bison does not compute which goto actions - are useless. - - * namespace - - * Languages(s): C++ - - * Purpose: Specifies the namespace for the parser class. - For example, if you specify: - - %define namespace "foo::bar" - - Bison uses `foo::bar' verbatim in references such as: - - foo::bar::parser::semantic_type - - However, to open a namespace, Bison removes any leading - `::' and then splits on any remaining occurrences: - - namespace foo { namespace bar { - class position; - class location; - } } - - * Accepted Values: Any absolute or relative C++ namespace - reference without a trailing `"::"'. For example, - `"foo"' or `"::foo::bar"'. - - * Default Value: The value specified by `%name-prefix', - which defaults to `yy'. This usage of `%name-prefix' is - for backward compatibility and can be confusing since - `%name-prefix' also specifies the textual prefix for the - lexical analyzer function. Thus, if you specify - `%name-prefix', it is best to also specify `%define - namespace' so that `%name-prefix' _only_ affects the - lexical analyzer function. For example, if you specify: - - %define namespace "foo" - %name-prefix "bar::" - - The parser namespace is `foo' and `yylex' is referenced - as `bar::lex'. - - - -- Directive: %defines - Write a header file containing macro definitions for the token type - names defined in the grammar as well as a few other declarations. - If the parser output file is named `NAME.c' then this file is - named `NAME.h'. - - For C parsers, the output header declares `YYSTYPE' unless - `YYSTYPE' is already defined as a macro or you have used a - `<TYPE>' tag without using `%union'. Therefore, if you are using - a `%union' (*note More Than One Value Type: Multiple Types.) with - components that require other definitions, or if you have defined - a `YYSTYPE' macro or type definition (*note Data Types of Semantic - Values: Value Type.), you need to arrange for these definitions to - be propagated to all modules, e.g., by putting them in a - prerequisite header that is included both by your parser and by - any other module that needs `YYSTYPE'. - - Unless your parser is pure, the output header declares `yylval' as - an external variable. *Note A Pure (Reentrant) Parser: Pure Decl. - - If you have also used locations, the output header declares - `YYLTYPE' and `yylloc' using a protocol similar to that of the - `YYSTYPE' macro and `yylval'. *Note Tracking Locations: Locations. - - This output file is normally essential if you wish to put the - definition of `yylex' in a separate source file, because `yylex' - typically needs to be able to refer to the above-mentioned - declarations and to the token type codes. *Note Semantic Values - of Tokens: Token Values. - - If you have declared `%code requires' or `%code provides', the - output header also contains their code. *Note %code: Decl Summary. - - -- Directive: %defines DEFINES-FILE - Same as above, but save in the file DEFINES-FILE. - - -- Directive: %destructor - Specify how the parser should reclaim the memory associated to - discarded symbols. *Note Freeing Discarded Symbols: Destructor - Decl. - - -- Directive: %file-prefix "PREFIX" - Specify a prefix to use for all Bison output file names. The - names are chosen as if the input file were named `PREFIX.y'. - - -- Directive: %language "LANGUAGE" - Specify the programming language for the generated parser. - Currently supported languages include C, C++, and Java. LANGUAGE - is case-insensitive. - - This directive is experimental and its effect may be modified in - future releases. - - -- Directive: %locations - Generate the code processing the locations (*note Special Features - for Use in Actions: Action Features.). This mode is enabled as - soon as the grammar uses the special `@N' tokens, but if your - grammar does not use it, using `%locations' allows for more - accurate syntax error messages. - - -- Directive: %name-prefix "PREFIX" - Rename the external symbols used in the parser so that they start - with PREFIX instead of `yy'. The precise list of symbols renamed - in C parsers is `yyparse', `yylex', `yyerror', `yynerrs', - `yylval', `yychar', `yydebug', and (if locations are used) - `yylloc'. If you use a push parser, `yypush_parse', - `yypull_parse', `yypstate', `yypstate_new' and `yypstate_delete' - will also be renamed. For example, if you use `%name-prefix - "c_"', the names become `c_parse', `c_lex', and so on. For C++ - parsers, see the `%define namespace' documentation in this section. - *Note Multiple Parsers in the Same Program: Multiple Parsers. - - -- Directive: %no-lines - Don't generate any `#line' preprocessor commands in the parser - file. Ordinarily Bison writes these commands in the parser file - so that the C compiler and debuggers will associate errors and - object code with your source file (the grammar file). This - directive causes them to associate errors with the parser file, - treating it an independent source file in its own right. - - -- Directive: %output "FILE" - Specify FILE for the parser file. - - -- Directive: %pure-parser - Deprecated version of `%define api.pure' (*note %define: Decl - Summary.), for which Bison is more careful to warn about - unreasonable usage. - - -- Directive: %require "VERSION" - Require version VERSION or higher of Bison. *Note Require a - Version of Bison: Require Decl. - - -- Directive: %skeleton "FILE" - Specify the skeleton to use. - - If FILE does not contain a `/', FILE is the name of a skeleton - file in the Bison installation directory. If it does, FILE is an - absolute file name or a file name relative to the directory of the - grammar file. This is similar to how most shells resolve commands. - - -- Directive: %token-table - Generate an array of token names in the parser file. The name of - the array is `yytname'; `yytname[I]' is the name of the token - whose internal Bison token code number is I. The first three - elements of `yytname' correspond to the predefined tokens `"$end"', - `"error"', and `"$undefined"'; after these come the symbols - defined in the grammar file. - - The name in the table includes all the characters needed to - represent the token in Bison. For single-character literals and - literal strings, this includes the surrounding quoting characters - and any escape sequences. For example, the Bison single-character - literal `'+'' corresponds to a three-character name, represented - in C as `"'+'"'; and the Bison two-character literal string `"\\/"' - corresponds to a five-character name, represented in C as - `"\"\\\\/\""'. - - When you specify `%token-table', Bison also generates macro - definitions for macros `YYNTOKENS', `YYNNTS', and `YYNRULES', and - `YYNSTATES': - - `YYNTOKENS' - The highest token number, plus one. - - `YYNNTS' - The number of nonterminal symbols. - - `YYNRULES' - The number of grammar rules, - - `YYNSTATES' - The number of parser states (*note Parser States::). - - -- Directive: %verbose - Write an extra output file containing verbose descriptions of the - parser states and what is done for each type of lookahead token in - that state. *Note Understanding Your Parser: Understanding, for - more information. - - -- Directive: %yacc - Pretend the option `--yacc' was given, i.e., imitate Yacc, - including its naming conventions. *Note Bison Options::, for more. - - ---------- Footnotes ---------- - - (1) The default location is actually skeleton-dependent; writers -of non-standard skeletons however should choose the default location -consistently with the behavior of the standard Bison skeletons. - - -File: bison.info, Node: Multiple Parsers, Prev: Declarations, Up: Grammar File - -3.8 Multiple Parsers in the Same Program -======================================== - -Most programs that use Bison parse only one language and therefore -contain only one Bison parser. But what if you want to parse more than -one language with the same program? Then you need to avoid a name -conflict between different definitions of `yyparse', `yylval', and so -on. - - The easy way to do this is to use the option `-p PREFIX' (*note -Invoking Bison: Invocation.). This renames the interface functions and -variables of the Bison parser to start with PREFIX instead of `yy'. -You can use this to give each parser distinct names that do not -conflict. - - The precise list of symbols renamed is `yyparse', `yylex', -`yyerror', `yynerrs', `yylval', `yylloc', `yychar' and `yydebug'. If -you use a push parser, `yypush_parse', `yypull_parse', `yypstate', -`yypstate_new' and `yypstate_delete' will also be renamed. For -example, if you use `-p c', the names become `cparse', `clex', and so -on. - - *All the other variables and macros associated with Bison are not -renamed.* These others are not global; there is no conflict if the same -name is used in different parsers. For example, `YYSTYPE' is not -renamed, but defining this in different ways in different parsers causes -no trouble (*note Data Types of Semantic Values: Value Type.). - - The `-p' option works by adding macro definitions to the beginning -of the parser source file, defining `yyparse' as `PREFIXparse', and so -on. This effectively substitutes one name for the other in the entire -parser file. - - -File: bison.info, Node: Interface, Next: Algorithm, Prev: Grammar File, Up: Top - -4 Parser C-Language Interface -***************************** - -The Bison parser is actually a C function named `yyparse'. Here we -describe the interface conventions of `yyparse' and the other functions -that it needs to use. - - Keep in mind that the parser uses many C identifiers starting with -`yy' and `YY' for internal purposes. If you use such an identifier -(aside from those in this manual) in an action or in epilogue in the -grammar file, you are likely to run into trouble. - -* Menu: - -* Parser Function:: How to call `yyparse' and what it returns. -* Push Parser Function:: How to call `yypush_parse' and what it returns. -* Pull Parser Function:: How to call `yypull_parse' and what it returns. -* Parser Create Function:: How to call `yypstate_new' and what it returns. -* Parser Delete Function:: How to call `yypstate_delete' and what it returns. -* Lexical:: You must supply a function `yylex' - which reads tokens. -* Error Reporting:: You must supply a function `yyerror'. -* Action Features:: Special features for use in actions. -* Internationalization:: How to let the parser speak in the user's - native language. - - -File: bison.info, Node: Parser Function, Next: Push Parser Function, Up: Interface - -4.1 The Parser Function `yyparse' -================================= - -You call the function `yyparse' to cause parsing to occur. This -function reads tokens, executes actions, and ultimately returns when it -encounters end-of-input or an unrecoverable syntax error. You can also -write an action which directs `yyparse' to return immediately without -reading further. - - -- Function: int yyparse (void) - The value returned by `yyparse' is 0 if parsing was successful - (return is due to end-of-input). - - The value is 1 if parsing failed because of invalid input, i.e., - input that contains a syntax error or that causes `YYABORT' to be - invoked. - - The value is 2 if parsing failed due to memory exhaustion. - - In an action, you can cause immediate return from `yyparse' by using -these macros: - - -- Macro: YYACCEPT - Return immediately with value 0 (to report success). - - -- Macro: YYABORT - Return immediately with value 1 (to report failure). - - If you use a reentrant parser, you can optionally pass additional -parameter information to it in a reentrant way. To do so, use the -declaration `%parse-param': - - -- Directive: %parse-param {ARGUMENT-DECLARATION} - Declare that an argument declared by the braced-code - ARGUMENT-DECLARATION is an additional `yyparse' argument. The - ARGUMENT-DECLARATION is used when declaring functions or - prototypes. The last identifier in ARGUMENT-DECLARATION must be - the argument name. - - Here's an example. Write this in the parser: - - %parse-param {int *nastiness} - %parse-param {int *randomness} - -Then call the parser like this: - - { - int nastiness, randomness; - ... /* Store proper data in `nastiness' and `randomness'. */ - value = yyparse (&nastiness, &randomness); - ... - } - -In the grammar actions, use expressions like this to refer to the data: - - exp: ... { ...; *randomness += 1; ... } - - -File: bison.info, Node: Push Parser Function, Next: Pull Parser Function, Prev: Parser Function, Up: Interface - -4.2 The Push Parser Function `yypush_parse' -=========================================== - -(The current push parsing interface is experimental and may evolve. -More user feedback will help to stabilize it.) - - You call the function `yypush_parse' to parse a single token. This -function is available if either the `%define api.push_pull "push"' or -`%define api.push_pull "both"' declaration is used. *Note A Push -Parser: Push Decl. - - -- Function: int yypush_parse (yypstate *yyps) - The value returned by `yypush_parse' is the same as for yyparse - with the following exception. `yypush_parse' will return - YYPUSH_MORE if more input is required to finish parsing the - grammar. - - -File: bison.info, Node: Pull Parser Function, Next: Parser Create Function, Prev: Push Parser Function, Up: Interface - -4.3 The Pull Parser Function `yypull_parse' -=========================================== - -(The current push parsing interface is experimental and may evolve. -More user feedback will help to stabilize it.) - - You call the function `yypull_parse' to parse the rest of the input -stream. This function is available if the `%define api.push_pull -"both"' declaration is used. *Note A Push Parser: Push Decl. - - -- Function: int yypull_parse (yypstate *yyps) - The value returned by `yypull_parse' is the same as for `yyparse'. - - -File: bison.info, Node: Parser Create Function, Next: Parser Delete Function, Prev: Pull Parser Function, Up: Interface - -4.4 The Parser Create Function `yystate_new' -============================================ - -(The current push parsing interface is experimental and may evolve. -More user feedback will help to stabilize it.) - - You call the function `yypstate_new' to create a new parser instance. -This function is available if either the `%define api.push_pull "push"' -or `%define api.push_pull "both"' declaration is used. *Note A Push -Parser: Push Decl. - - -- Function: yypstate *yypstate_new (void) - The fuction will return a valid parser instance if there was - memory available or 0 if no memory was available. In impure mode, - it will also return 0 if a parser instance is currently allocated. - - -File: bison.info, Node: Parser Delete Function, Next: Lexical, Prev: Parser Create Function, Up: Interface - -4.5 The Parser Delete Function `yystate_delete' -=============================================== - -(The current push parsing interface is experimental and may evolve. -More user feedback will help to stabilize it.) - - You call the function `yypstate_delete' to delete a parser instance. -function is available if either the `%define api.push_pull "push"' or -`%define api.push_pull "both"' declaration is used. *Note A Push -Parser: Push Decl. - - -- Function: void yypstate_delete (yypstate *yyps) - This function will reclaim the memory associated with a parser - instance. After this call, you should no longer attempt to use - the parser instance. - - -File: bison.info, Node: Lexical, Next: Error Reporting, Prev: Parser Delete Function, Up: Interface - -4.6 The Lexical Analyzer Function `yylex' -========================================= - -The "lexical analyzer" function, `yylex', recognizes tokens from the -input stream and returns them to the parser. Bison does not create -this function automatically; you must write it so that `yyparse' can -call it. The function is sometimes referred to as a lexical scanner. - - In simple programs, `yylex' is often defined at the end of the Bison -grammar file. If `yylex' is defined in a separate source file, you -need to arrange for the token-type macro definitions to be available -there. To do this, use the `-d' option when you run Bison, so that it -will write these macro definitions into a separate header file -`NAME.tab.h' which you can include in the other source files that need -it. *Note Invoking Bison: Invocation. - -* Menu: - -* Calling Convention:: How `yyparse' calls `yylex'. -* Token Values:: How `yylex' must return the semantic value - of the token it has read. -* Token Locations:: How `yylex' must return the text location - (line number, etc.) of the token, if the - actions want that. -* Pure Calling:: How the calling convention differs in a pure parser - (*note A Pure (Reentrant) Parser: Pure Decl.). - - -File: bison.info, Node: Calling Convention, Next: Token Values, Up: Lexical - -4.6.1 Calling Convention for `yylex' ------------------------------------- - -The value that `yylex' returns must be the positive numeric code for -the type of token it has just found; a zero or negative value signifies -end-of-input. - - When a token is referred to in the grammar rules by a name, that name -in the parser file becomes a C macro whose definition is the proper -numeric code for that token type. So `yylex' can use the name to -indicate that type. *Note Symbols::. - - When a token is referred to in the grammar rules by a character -literal, the numeric code for that character is also the code for the -token type. So `yylex' can simply return that character code, possibly -converted to `unsigned char' to avoid sign-extension. The null -character must not be used this way, because its code is zero and that -signifies end-of-input. - - Here is an example showing these things: - - int - yylex (void) - { - ... - if (c == EOF) /* Detect end-of-input. */ - return 0; - ... - if (c == '+' || c == '-') - return c; /* Assume token type for `+' is '+'. */ - ... - return INT; /* Return the type of the token. */ - ... - } - -This interface has been designed so that the output from the `lex' -utility can be used without change as the definition of `yylex'. - - If the grammar uses literal string tokens, there are two ways that -`yylex' can determine the token type codes for them: - - * If the grammar defines symbolic token names as aliases for the - literal string tokens, `yylex' can use these symbolic names like - all others. In this case, the use of the literal string tokens in - the grammar file has no effect on `yylex'. - - * `yylex' can find the multicharacter token in the `yytname' table. - The index of the token in the table is the token type's code. The - name of a multicharacter token is recorded in `yytname' with a - double-quote, the token's characters, and another double-quote. - The token's characters are escaped as necessary to be suitable as - input to Bison. - - Here's code for looking up a multicharacter token in `yytname', - assuming that the characters of the token are stored in - `token_buffer', and assuming that the token does not contain any - characters like `"' that require escaping. - - for (i = 0; i < YYNTOKENS; i++) - { - if (yytname[i] != 0 - && yytname[i][0] == '"' - && ! strncmp (yytname[i] + 1, token_buffer, - strlen (token_buffer)) - && yytname[i][strlen (token_buffer) + 1] == '"' - && yytname[i][strlen (token_buffer) + 2] == 0) - break; - } - - The `yytname' table is generated only if you use the - `%token-table' declaration. *Note Decl Summary::. - - -File: bison.info, Node: Token Values, Next: Token Locations, Prev: Calling Convention, Up: Lexical - -4.6.2 Semantic Values of Tokens -------------------------------- - -In an ordinary (nonreentrant) parser, the semantic value of the token -must be stored into the global variable `yylval'. When you are using -just one data type for semantic values, `yylval' has that type. Thus, -if the type is `int' (the default), you might write this in `yylex': - - ... - yylval = value; /* Put value onto Bison stack. */ - return INT; /* Return the type of the token. */ - ... - - When you are using multiple data types, `yylval''s type is a union -made from the `%union' declaration (*note The Collection of Value -Types: Union Decl.). So when you store a token's value, you must use -the proper member of the union. If the `%union' declaration looks like -this: - - %union { - int intval; - double val; - symrec *tptr; - } - -then the code in `yylex' might look like this: - - ... - yylval.intval = value; /* Put value onto Bison stack. */ - return INT; /* Return the type of the token. */ - ... - - -File: bison.info, Node: Token Locations, Next: Pure Calling, Prev: Token Values, Up: Lexical - -4.6.3 Textual Locations of Tokens ---------------------------------- - -If you are using the `@N'-feature (*note Tracking Locations: -Locations.) in actions to keep track of the textual locations of tokens -and groupings, then you must provide this information in `yylex'. The -function `yyparse' expects to find the textual location of a token just -parsed in the global variable `yylloc'. So `yylex' must store the -proper data in that variable. - - By default, the value of `yylloc' is a structure and you need only -initialize the members that are going to be used by the actions. The -four members are called `first_line', `first_column', `last_line' and -`last_column'. Note that the use of this feature makes the parser -noticeably slower. - - The data type of `yylloc' has the name `YYLTYPE'. - - -File: bison.info, Node: Pure Calling, Prev: Token Locations, Up: Lexical - -4.6.4 Calling Conventions for Pure Parsers ------------------------------------------- - -When you use the Bison declaration `%define api.pure' to request a -pure, reentrant parser, the global communication variables `yylval' and -`yylloc' cannot be used. (*Note A Pure (Reentrant) Parser: Pure Decl.) -In such parsers the two global variables are replaced by pointers -passed as arguments to `yylex'. You must declare them as shown here, -and pass the information back by storing it through those pointers. - - int - yylex (YYSTYPE *lvalp, YYLTYPE *llocp) - { - ... - *lvalp = value; /* Put value onto Bison stack. */ - return INT; /* Return the type of the token. */ - ... - } - - If the grammar file does not use the `@' constructs to refer to -textual locations, then the type `YYLTYPE' will not be defined. In -this case, omit the second argument; `yylex' will be called with only -one argument. - - If you wish to pass the additional parameter data to `yylex', use -`%lex-param' just like `%parse-param' (*note Parser Function::). - - -- Directive: lex-param {ARGUMENT-DECLARATION} - Declare that the braced-code ARGUMENT-DECLARATION is an additional - `yylex' argument declaration. - - For instance: - - %parse-param {int *nastiness} - %lex-param {int *nastiness} - %parse-param {int *randomness} - -results in the following signature: - - int yylex (int *nastiness); - int yyparse (int *nastiness, int *randomness); - - If `%define api.pure' is added: - - int yylex (YYSTYPE *lvalp, int *nastiness); - int yyparse (int *nastiness, int *randomness); - -and finally, if both `%define api.pure' and `%locations' are used: - - int yylex (YYSTYPE *lvalp, YYLTYPE *llocp, int *nastiness); - int yyparse (int *nastiness, int *randomness); - - -File: bison.info, Node: Error Reporting, Next: Action Features, Prev: Lexical, Up: Interface - -4.7 The Error Reporting Function `yyerror' -========================================== - -The Bison parser detects a "syntax error" or "parse error" whenever it -reads a token which cannot satisfy any syntax rule. An action in the -grammar can also explicitly proclaim an error, using the macro -`YYERROR' (*note Special Features for Use in Actions: Action Features.). - - The Bison parser expects to report the error by calling an error -reporting function named `yyerror', which you must supply. It is -called by `yyparse' whenever a syntax error is found, and it receives -one argument. For a syntax error, the string is normally -`"syntax error"'. - - If you invoke the directive `%error-verbose' in the Bison -declarations section (*note The Bison Declarations Section: Bison -Declarations.), then Bison provides a more verbose and specific error -message string instead of just plain `"syntax error"'. - - The parser can detect one other kind of error: memory exhaustion. -This can happen when the input contains constructions that are very -deeply nested. It isn't likely you will encounter this, since the Bison -parser normally extends its stack automatically up to a very large -limit. But if memory is exhausted, `yyparse' calls `yyerror' in the -usual fashion, except that the argument string is `"memory exhausted"'. - - In some cases diagnostics like `"syntax error"' are translated -automatically from English to some other language before they are -passed to `yyerror'. *Note Internationalization::. - - The following definition suffices in simple programs: - - void - yyerror (char const *s) - { - fprintf (stderr, "%s\n", s); - } - - After `yyerror' returns to `yyparse', the latter will attempt error -recovery if you have written suitable error recovery grammar rules -(*note Error Recovery::). If recovery is impossible, `yyparse' will -immediately return 1. - - Obviously, in location tracking pure parsers, `yyerror' should have -an access to the current location. This is indeed the case for the GLR -parsers, but not for the Yacc parser, for historical reasons. I.e., if -`%locations %define api.pure' is passed then the prototypes for -`yyerror' are: - - void yyerror (char const *msg); /* Yacc parsers. */ - void yyerror (YYLTYPE *locp, char const *msg); /* GLR parsers. */ - - If `%parse-param {int *nastiness}' is used, then: - - void yyerror (int *nastiness, char const *msg); /* Yacc parsers. */ - void yyerror (int *nastiness, char const *msg); /* GLR parsers. */ - - Finally, GLR and Yacc parsers share the same `yyerror' calling -convention for absolutely pure parsers, i.e., when the calling -convention of `yylex' _and_ the calling convention of `%define -api.pure' are pure. I.e.: - - /* Location tracking. */ - %locations - /* Pure yylex. */ - %define api.pure - %lex-param {int *nastiness} - /* Pure yyparse. */ - %parse-param {int *nastiness} - %parse-param {int *randomness} - -results in the following signatures for all the parser kinds: - - int yylex (YYSTYPE *lvalp, YYLTYPE *llocp, int *nastiness); - int yyparse (int *nastiness, int *randomness); - void yyerror (YYLTYPE *locp, - int *nastiness, int *randomness, - char const *msg); - -The prototypes are only indications of how the code produced by Bison -uses `yyerror'. Bison-generated code always ignores the returned -value, so `yyerror' can return any type, including `void'. Also, -`yyerror' can be a variadic function; that is why the message is always -passed last. - - Traditionally `yyerror' returns an `int' that is always ignored, but -this is purely for historical reasons, and `void' is preferable since -it more accurately describes the return type for `yyerror'. - - The variable `yynerrs' contains the number of syntax errors reported -so far. Normally this variable is global; but if you request a pure -parser (*note A Pure (Reentrant) Parser: Pure Decl.) then it is a -local variable which only the actions can access. - - -File: bison.info, Node: Action Features, Next: Internationalization, Prev: Error Reporting, Up: Interface - -4.8 Special Features for Use in Actions -======================================= - -Here is a table of Bison constructs, variables and macros that are -useful in actions. - - -- Variable: $$ - Acts like a variable that contains the semantic value for the - grouping made by the current rule. *Note Actions::. - - -- Variable: $N - Acts like a variable that contains the semantic value for the Nth - component of the current rule. *Note Actions::. - - -- Variable: $<TYPEALT>$ - Like `$$' but specifies alternative TYPEALT in the union specified - by the `%union' declaration. *Note Data Types of Values in - Actions: Action Types. - - -- Variable: $<TYPEALT>N - Like `$N' but specifies alternative TYPEALT in the union specified - by the `%union' declaration. *Note Data Types of Values in - Actions: Action Types. - - -- Macro: YYABORT; - Return immediately from `yyparse', indicating failure. *Note The - Parser Function `yyparse': Parser Function. - - -- Macro: YYACCEPT; - Return immediately from `yyparse', indicating success. *Note The - Parser Function `yyparse': Parser Function. - - -- Macro: YYBACKUP (TOKEN, VALUE); - Unshift a token. This macro is allowed only for rules that reduce - a single value, and only when there is no lookahead token. It is - also disallowed in GLR parsers. It installs a lookahead token - with token type TOKEN and semantic value VALUE; then it discards - the value that was going to be reduced by this rule. - - If the macro is used when it is not valid, such as when there is a - lookahead token already, then it reports a syntax error with a - message `cannot back up' and performs ordinary error recovery. - - In either case, the rest of the action is not executed. - - -- Macro: YYEMPTY - Value stored in `yychar' when there is no lookahead token. - - -- Macro: YYEOF - Value stored in `yychar' when the lookahead is the end of the input - stream. - - -- Macro: YYERROR; - Cause an immediate syntax error. This statement initiates error - recovery just as if the parser itself had detected an error; - however, it does not call `yyerror', and does not print any - message. If you want to print an error message, call `yyerror' - explicitly before the `YYERROR;' statement. *Note Error - Recovery::. - - -- Macro: YYRECOVERING - The expression `YYRECOVERING ()' yields 1 when the parser is - recovering from a syntax error, and 0 otherwise. *Note Error - Recovery::. - - -- Variable: yychar - Variable containing either the lookahead token, or `YYEOF' when the - lookahead is the end of the input stream, or `YYEMPTY' when no - lookahead has been performed so the next token is not yet known. - Do not modify `yychar' in a deferred semantic action (*note GLR - Semantic Actions::). *Note Lookahead Tokens: Lookahead. - - -- Macro: yyclearin; - Discard the current lookahead token. This is useful primarily in - error rules. Do not invoke `yyclearin' in a deferred semantic - action (*note GLR Semantic Actions::). *Note Error Recovery::. - - -- Macro: yyerrok; - Resume generating error messages immediately for subsequent syntax - errors. This is useful primarily in error rules. *Note Error - Recovery::. - - -- Variable: yylloc - Variable containing the lookahead token location when `yychar' is - not set to `YYEMPTY' or `YYEOF'. Do not modify `yylloc' in a - deferred semantic action (*note GLR Semantic Actions::). *Note - Actions and Locations: Actions and Locations. - - -- Variable: yylval - Variable containing the lookahead token semantic value when - `yychar' is not set to `YYEMPTY' or `YYEOF'. Do not modify - `yylval' in a deferred semantic action (*note GLR Semantic - Actions::). *Note Actions: Actions. - - -- Value: @$ - Acts like a structure variable containing information on the - textual location of the grouping made by the current rule. *Note - Tracking Locations: Locations. - - - -- Value: @N - Acts like a structure variable containing information on the - textual location of the Nth component of the current rule. *Note - Tracking Locations: Locations. - - -File: bison.info, Node: Internationalization, Prev: Action Features, Up: Interface - -4.9 Parser Internationalization -=============================== - -A Bison-generated parser can print diagnostics, including error and -tracing messages. By default, they appear in English. However, Bison -also supports outputting diagnostics in the user's native language. To -make this work, the user should set the usual environment variables. -*Note The User's View: (gettext)Users. For example, the shell command -`export LC_ALL=fr_CA.UTF-8' might set the user's locale to French -Canadian using the UTF-8 encoding. The exact set of available locales -depends on the user's installation. - - The maintainer of a package that uses a Bison-generated parser -enables the internationalization of the parser's output through the -following steps. Here we assume a package that uses GNU Autoconf and -GNU Automake. - - 1. Into the directory containing the GNU Autoconf macros used by the - package--often called `m4'--copy the `bison-i18n.m4' file - installed by Bison under `share/aclocal/bison-i18n.m4' in Bison's - installation directory. For example: - - cp /usr/local/share/aclocal/bison-i18n.m4 m4/bison-i18n.m4 - - 2. In the top-level `configure.ac', after the `AM_GNU_GETTEXT' - invocation, add an invocation of `BISON_I18N'. This macro is - defined in the file `bison-i18n.m4' that you copied earlier. It - causes `configure' to find the value of the `BISON_LOCALEDIR' - variable, and it defines the source-language symbol `YYENABLE_NLS' - to enable translations in the Bison-generated parser. - - 3. In the `main' function of your program, designate the directory - containing Bison's runtime message catalog, through a call to - `bindtextdomain' with domain name `bison-runtime'. For example: - - bindtextdomain ("bison-runtime", BISON_LOCALEDIR); - - Typically this appears after any other call `bindtextdomain - (PACKAGE, LOCALEDIR)' that your package already has. Here we rely - on `BISON_LOCALEDIR' to be defined as a string through the - `Makefile'. - - 4. In the `Makefile.am' that controls the compilation of the `main' - function, make `BISON_LOCALEDIR' available as a C preprocessor - macro, either in `DEFS' or in `AM_CPPFLAGS'. For example: - - DEFS = @DEFS@ -DBISON_LOCALEDIR='"$(BISON_LOCALEDIR)"' - - or: - - AM_CPPFLAGS = -DBISON_LOCALEDIR='"$(BISON_LOCALEDIR)"' - - 5. Finally, invoke the command `autoreconf' to generate the build - infrastructure. - - -File: bison.info, Node: Algorithm, Next: Error Recovery, Prev: Interface, Up: Top - -5 The Bison Parser Algorithm -**************************** - -As Bison reads tokens, it pushes them onto a stack along with their -semantic values. The stack is called the "parser stack". Pushing a -token is traditionally called "shifting". - - For example, suppose the infix calculator has read `1 + 5 *', with a -`3' to come. The stack will have four elements, one for each token -that was shifted. - - But the stack does not always have an element for each token read. -When the last N tokens and groupings shifted match the components of a -grammar rule, they can be combined according to that rule. This is -called "reduction". Those tokens and groupings are replaced on the -stack by a single grouping whose symbol is the result (left hand side) -of that rule. Running the rule's action is part of the process of -reduction, because this is what computes the semantic value of the -resulting grouping. - - For example, if the infix calculator's parser stack contains this: - - 1 + 5 * 3 - -and the next input token is a newline character, then the last three -elements can be reduced to 15 via the rule: - - expr: expr '*' expr; - -Then the stack contains just these three elements: - - 1 + 15 - -At this point, another reduction can be made, resulting in the single -value 16. Then the newline token can be shifted. - - The parser tries, by shifts and reductions, to reduce the entire -input down to a single grouping whose symbol is the grammar's -start-symbol (*note Languages and Context-Free Grammars: Language and -Grammar.). - - This kind of parser is known in the literature as a bottom-up parser. - -* Menu: - -* Lookahead:: Parser looks one token ahead when deciding what to do. -* Shift/Reduce:: Conflicts: when either shifting or reduction is valid. -* Precedence:: Operator precedence works by resolving conflicts. -* Contextual Precedence:: When an operator's precedence depends on context. -* Parser States:: The parser is a finite-state-machine with stack. -* Reduce/Reduce:: When two rules are applicable in the same situation. -* Mystery Conflicts:: Reduce/reduce conflicts that look unjustified. -* Generalized LR Parsing:: Parsing arbitrary context-free grammars. -* Memory Management:: What happens when memory is exhausted. How to avoid it. - - -File: bison.info, Node: Lookahead, Next: Shift/Reduce, Up: Algorithm - -5.1 Lookahead Tokens -==================== - -The Bison parser does _not_ always reduce immediately as soon as the -last N tokens and groupings match a rule. This is because such a -simple strategy is inadequate to handle most languages. Instead, when a -reduction is possible, the parser sometimes "looks ahead" at the next -token in order to decide what to do. - - When a token is read, it is not immediately shifted; first it -becomes the "lookahead token", which is not on the stack. Now the -parser can perform one or more reductions of tokens and groupings on -the stack, while the lookahead token remains off to the side. When no -more reductions should take place, the lookahead token is shifted onto -the stack. This does not mean that all possible reductions have been -done; depending on the token type of the lookahead token, some rules -may choose to delay their application. - - Here is a simple case where lookahead is needed. These three rules -define expressions which contain binary addition operators and postfix -unary factorial operators (`!'), and allow parentheses for grouping. - - expr: term '+' expr - | term - ; - - term: '(' expr ')' - | term '!' - | NUMBER - ; - - Suppose that the tokens `1 + 2' have been read and shifted; what -should be done? If the following token is `)', then the first three -tokens must be reduced to form an `expr'. This is the only valid -course, because shifting the `)' would produce a sequence of symbols -`term ')'', and no rule allows this. - - If the following token is `!', then it must be shifted immediately so -that `2 !' can be reduced to make a `term'. If instead the parser were -to reduce before shifting, `1 + 2' would become an `expr'. It would -then be impossible to shift the `!' because doing so would produce on -the stack the sequence of symbols `expr '!''. No rule allows that -sequence. - - The lookahead token is stored in the variable `yychar'. Its -semantic value and location, if any, are stored in the variables -`yylval' and `yylloc'. *Note Special Features for Use in Actions: -Action Features. - - -File: bison.info, Node: Shift/Reduce, Next: Precedence, Prev: Lookahead, Up: Algorithm - -5.2 Shift/Reduce Conflicts -========================== - -Suppose we are parsing a language which has if-then and if-then-else -statements, with a pair of rules like this: - - if_stmt: - IF expr THEN stmt - | IF expr THEN stmt ELSE stmt - ; - -Here we assume that `IF', `THEN' and `ELSE' are terminal symbols for -specific keyword tokens. - - When the `ELSE' token is read and becomes the lookahead token, the -contents of the stack (assuming the input is valid) are just right for -reduction by the first rule. But it is also legitimate to shift the -`ELSE', because that would lead to eventual reduction by the second -rule. - - This situation, where either a shift or a reduction would be valid, -is called a "shift/reduce conflict". Bison is designed to resolve -these conflicts by choosing to shift, unless otherwise directed by -operator precedence declarations. To see the reason for this, let's -contrast it with the other alternative. - - Since the parser prefers to shift the `ELSE', the result is to attach -the else-clause to the innermost if-statement, making these two inputs -equivalent: - - if x then if y then win (); else lose; - - if x then do; if y then win (); else lose; end; - - But if the parser chose to reduce when possible rather than shift, -the result would be to attach the else-clause to the outermost -if-statement, making these two inputs equivalent: - - if x then if y then win (); else lose; - - if x then do; if y then win (); end; else lose; - - The conflict exists because the grammar as written is ambiguous: -either parsing of the simple nested if-statement is legitimate. The -established convention is that these ambiguities are resolved by -attaching the else-clause to the innermost if-statement; this is what -Bison accomplishes by choosing to shift rather than reduce. (It would -ideally be cleaner to write an unambiguous grammar, but that is very -hard to do in this case.) This particular ambiguity was first -encountered in the specifications of Algol 60 and is called the -"dangling `else'" ambiguity. - - To avoid warnings from Bison about predictable, legitimate -shift/reduce conflicts, use the `%expect N' declaration. There will be -no warning as long as the number of shift/reduce conflicts is exactly N. -*Note Suppressing Conflict Warnings: Expect Decl. - - The definition of `if_stmt' above is solely to blame for the -conflict, but the conflict does not actually appear without additional -rules. Here is a complete Bison input file that actually manifests the -conflict: - - %token IF THEN ELSE variable - %% - stmt: expr - | if_stmt - ; - - if_stmt: - IF expr THEN stmt - | IF expr THEN stmt ELSE stmt - ; - - expr: variable - ; - - -File: bison.info, Node: Precedence, Next: Contextual Precedence, Prev: Shift/Reduce, Up: Algorithm - -5.3 Operator Precedence -======================= - -Another situation where shift/reduce conflicts appear is in arithmetic -expressions. Here shifting is not always the preferred resolution; the -Bison declarations for operator precedence allow you to specify when to -shift and when to reduce. - -* Menu: - -* Why Precedence:: An example showing why precedence is needed. -* Using Precedence:: How to specify precedence in Bison grammars. -* Precedence Examples:: How these features are used in the previous example. -* How Precedence:: How they work. - - -File: bison.info, Node: Why Precedence, Next: Using Precedence, Up: Precedence - -5.3.1 When Precedence is Needed -------------------------------- - -Consider the following ambiguous grammar fragment (ambiguous because the -input `1 - 2 * 3' can be parsed in two different ways): - - expr: expr '-' expr - | expr '*' expr - | expr '<' expr - | '(' expr ')' - ... - ; - -Suppose the parser has seen the tokens `1', `-' and `2'; should it -reduce them via the rule for the subtraction operator? It depends on -the next token. Of course, if the next token is `)', we must reduce; -shifting is invalid because no single rule can reduce the token -sequence `- 2 )' or anything starting with that. But if the next token -is `*' or `<', we have a choice: either shifting or reduction would -allow the parse to complete, but with different results. - - To decide which one Bison should do, we must consider the results. -If the next operator token OP is shifted, then it must be reduced first -in order to permit another opportunity to reduce the difference. The -result is (in effect) `1 - (2 OP 3)'. On the other hand, if the -subtraction is reduced before shifting OP, the result is -`(1 - 2) OP 3'. Clearly, then, the choice of shift or reduce should -depend on the relative precedence of the operators `-' and OP: `*' -should be shifted first, but not `<'. - - What about input such as `1 - 2 - 5'; should this be `(1 - 2) - 5' -or should it be `1 - (2 - 5)'? For most operators we prefer the -former, which is called "left association". The latter alternative, -"right association", is desirable for assignment operators. The choice -of left or right association is a matter of whether the parser chooses -to shift or reduce when the stack contains `1 - 2' and the lookahead -token is `-': shifting makes right-associativity. - - -File: bison.info, Node: Using Precedence, Next: Precedence Examples, Prev: Why Precedence, Up: Precedence - -5.3.2 Specifying Operator Precedence ------------------------------------- - -Bison allows you to specify these choices with the operator precedence -declarations `%left' and `%right'. Each such declaration contains a -list of tokens, which are operators whose precedence and associativity -is being declared. The `%left' declaration makes all those operators -left-associative and the `%right' declaration makes them -right-associative. A third alternative is `%nonassoc', which declares -that it is a syntax error to find the same operator twice "in a row". - - The relative precedence of different operators is controlled by the -order in which they are declared. The first `%left' or `%right' -declaration in the file declares the operators whose precedence is -lowest, the next such declaration declares the operators whose -precedence is a little higher, and so on. - - -File: bison.info, Node: Precedence Examples, Next: How Precedence, Prev: Using Precedence, Up: Precedence - -5.3.3 Precedence Examples -------------------------- - -In our example, we would want the following declarations: - - %left '<' - %left '-' - %left '*' - - In a more complete example, which supports other operators as well, -we would declare them in groups of equal precedence. For example, -`'+'' is declared with `'-'': - - %left '<' '>' '=' NE LE GE - %left '+' '-' - %left '*' '/' - -(Here `NE' and so on stand for the operators for "not equal" and so on. -We assume that these tokens are more than one character long and -therefore are represented by names, not character literals.) - - -File: bison.info, Node: How Precedence, Prev: Precedence Examples, Up: Precedence - -5.3.4 How Precedence Works --------------------------- - -The first effect of the precedence declarations is to assign precedence -levels to the terminal symbols declared. The second effect is to assign -precedence levels to certain rules: each rule gets its precedence from -the last terminal symbol mentioned in the components. (You can also -specify explicitly the precedence of a rule. *Note Context-Dependent -Precedence: Contextual Precedence.) - - Finally, the resolution of conflicts works by comparing the -precedence of the rule being considered with that of the lookahead -token. If the token's precedence is higher, the choice is to shift. -If the rule's precedence is higher, the choice is to reduce. If they -have equal precedence, the choice is made based on the associativity of -that precedence level. The verbose output file made by `-v' (*note -Invoking Bison: Invocation.) says how each conflict was resolved. - - Not all rules and not all tokens have precedence. If either the -rule or the lookahead token has no precedence, then the default is to -shift. - - -File: bison.info, Node: Contextual Precedence, Next: Parser States, Prev: Precedence, Up: Algorithm - -5.4 Context-Dependent Precedence -================================ - -Often the precedence of an operator depends on the context. This sounds -outlandish at first, but it is really very common. For example, a minus -sign typically has a very high precedence as a unary operator, and a -somewhat lower precedence (lower than multiplication) as a binary -operator. - - The Bison precedence declarations, `%left', `%right' and -`%nonassoc', can only be used once for a given token; so a token has -only one precedence declared in this way. For context-dependent -precedence, you need to use an additional mechanism: the `%prec' -modifier for rules. - - The `%prec' modifier declares the precedence of a particular rule by -specifying a terminal symbol whose precedence should be used for that -rule. It's not necessary for that symbol to appear otherwise in the -rule. The modifier's syntax is: - - %prec TERMINAL-SYMBOL - -and it is written after the components of the rule. Its effect is to -assign the rule the precedence of TERMINAL-SYMBOL, overriding the -precedence that would be deduced for it in the ordinary way. The -altered rule precedence then affects how conflicts involving that rule -are resolved (*note Operator Precedence: Precedence.). - - Here is how `%prec' solves the problem of unary minus. First, -declare a precedence for a fictitious terminal symbol named `UMINUS'. -There are no tokens of this type, but the symbol serves to stand for its -precedence: - - ... - %left '+' '-' - %left '*' - %left UMINUS - - Now the precedence of `UMINUS' can be used in specific rules: - - exp: ... - | exp '-' exp - ... - | '-' exp %prec UMINUS - - -File: bison.info, Node: Parser States, Next: Reduce/Reduce, Prev: Contextual Precedence, Up: Algorithm - -5.5 Parser States -================= - -The function `yyparse' is implemented using a finite-state machine. -The values pushed on the parser stack are not simply token type codes; -they represent the entire sequence of terminal and nonterminal symbols -at or near the top of the stack. The current state collects all the -information about previous input which is relevant to deciding what to -do next. - - Each time a lookahead token is read, the current parser state -together with the type of lookahead token are looked up in a table. -This table entry can say, "Shift the lookahead token." In this case, -it also specifies the new parser state, which is pushed onto the top of -the parser stack. Or it can say, "Reduce using rule number N." This -means that a certain number of tokens or groupings are taken off the -top of the stack, and replaced by one grouping. In other words, that -number of states are popped from the stack, and one new state is pushed. - - There is one other alternative: the table can say that the lookahead -token is erroneous in the current state. This causes error processing -to begin (*note Error Recovery::). - - -File: bison.info, Node: Reduce/Reduce, Next: Mystery Conflicts, Prev: Parser States, Up: Algorithm - -5.6 Reduce/Reduce Conflicts -=========================== - -A reduce/reduce conflict occurs if there are two or more rules that -apply to the same sequence of input. This usually indicates a serious -error in the grammar. - - For example, here is an erroneous attempt to define a sequence of -zero or more `word' groupings. - - sequence: /* empty */ - { printf ("empty sequence\n"); } - | maybeword - | sequence word - { printf ("added word %s\n", $2); } - ; - - maybeword: /* empty */ - { printf ("empty maybeword\n"); } - | word - { printf ("single word %s\n", $1); } - ; - -The error is an ambiguity: there is more than one way to parse a single -`word' into a `sequence'. It could be reduced to a `maybeword' and -then into a `sequence' via the second rule. Alternatively, -nothing-at-all could be reduced into a `sequence' via the first rule, -and this could be combined with the `word' using the third rule for -`sequence'. - - There is also more than one way to reduce nothing-at-all into a -`sequence'. This can be done directly via the first rule, or -indirectly via `maybeword' and then the second rule. - - You might think that this is a distinction without a difference, -because it does not change whether any particular input is valid or -not. But it does affect which actions are run. One parsing order runs -the second rule's action; the other runs the first rule's action and -the third rule's action. In this example, the output of the program -changes. - - Bison resolves a reduce/reduce conflict by choosing to use the rule -that appears first in the grammar, but it is very risky to rely on -this. Every reduce/reduce conflict must be studied and usually -eliminated. Here is the proper way to define `sequence': - - sequence: /* empty */ - { printf ("empty sequence\n"); } - | sequence word - { printf ("added word %s\n", $2); } - ; - - Here is another common error that yields a reduce/reduce conflict: - - sequence: /* empty */ - | sequence words - | sequence redirects - ; - - words: /* empty */ - | words word - ; - - redirects:/* empty */ - | redirects redirect - ; - -The intention here is to define a sequence which can contain either -`word' or `redirect' groupings. The individual definitions of -`sequence', `words' and `redirects' are error-free, but the three -together make a subtle ambiguity: even an empty input can be parsed in -infinitely many ways! - - Consider: nothing-at-all could be a `words'. Or it could be two -`words' in a row, or three, or any number. It could equally well be a -`redirects', or two, or any number. Or it could be a `words' followed -by three `redirects' and another `words'. And so on. - - Here are two ways to correct these rules. First, to make it a -single level of sequence: - - sequence: /* empty */ - | sequence word - | sequence redirect - ; - - Second, to prevent either a `words' or a `redirects' from being -empty: - - sequence: /* empty */ - | sequence words - | sequence redirects - ; - - words: word - | words word - ; - - redirects:redirect - | redirects redirect - ; - - -File: bison.info, Node: Mystery Conflicts, Next: Generalized LR Parsing, Prev: Reduce/Reduce, Up: Algorithm - -5.7 Mysterious Reduce/Reduce Conflicts -====================================== - -Sometimes reduce/reduce conflicts can occur that don't look warranted. -Here is an example: - - %token ID - - %% - def: param_spec return_spec ',' - ; - param_spec: - type - | name_list ':' type - ; - return_spec: - type - | name ':' type - ; - type: ID - ; - name: ID - ; - name_list: - name - | name ',' name_list - ; - - It would seem that this grammar can be parsed with only a single -token of lookahead: when a `param_spec' is being read, an `ID' is a -`name' if a comma or colon follows, or a `type' if another `ID' -follows. In other words, this grammar is LR(1). - - However, Bison, like most parser generators, cannot actually handle -all LR(1) grammars. In this grammar, two contexts, that after an `ID' -at the beginning of a `param_spec' and likewise at the beginning of a -`return_spec', are similar enough that Bison assumes they are the same. -They appear similar because the same set of rules would be active--the -rule for reducing to a `name' and that for reducing to a `type'. Bison -is unable to determine at that stage of processing that the rules would -require different lookahead tokens in the two contexts, so it makes a -single parser state for them both. Combining the two contexts causes a -conflict later. In parser terminology, this occurrence means that the -grammar is not LALR(1). - - In general, it is better to fix deficiencies than to document them. -But this particular deficiency is intrinsically hard to fix; parser -generators that can handle LR(1) grammars are hard to write and tend to -produce parsers that are very large. In practice, Bison is more useful -as it is now. - - When the problem arises, you can often fix it by identifying the two -parser states that are being confused, and adding something to make them -look distinct. In the above example, adding one rule to `return_spec' -as follows makes the problem go away: - - %token BOGUS - ... - %% - ... - return_spec: - type - | name ':' type - /* This rule is never used. */ - | ID BOGUS - ; - - This corrects the problem because it introduces the possibility of an -additional active rule in the context after the `ID' at the beginning of -`return_spec'. This rule is not active in the corresponding context in -a `param_spec', so the two contexts receive distinct parser states. As -long as the token `BOGUS' is never generated by `yylex', the added rule -cannot alter the way actual input is parsed. - - In this particular example, there is another way to solve the -problem: rewrite the rule for `return_spec' to use `ID' directly -instead of via `name'. This also causes the two confusing contexts to -have different sets of active rules, because the one for `return_spec' -activates the altered rule for `return_spec' rather than the one for -`name'. - - param_spec: - type - | name_list ':' type - ; - return_spec: - type - | ID ':' type - ; - - For a more detailed exposition of LALR(1) parsers and parser -generators, please see: Frank DeRemer and Thomas Pennello, Efficient -Computation of LALR(1) Look-Ahead Sets, `ACM Transactions on -Programming Languages and Systems', Vol. 4, No. 4 (October 1982), pp. -615-649 `http://doi.acm.org/10.1145/69622.357187'. - - -File: bison.info, Node: Generalized LR Parsing, Next: Memory Management, Prev: Mystery Conflicts, Up: Algorithm - -5.8 Generalized LR (GLR) Parsing -================================ - -Bison produces _deterministic_ parsers that choose uniquely when to -reduce and which reduction to apply based on a summary of the preceding -input and on one extra token of lookahead. As a result, normal Bison -handles a proper subset of the family of context-free languages. -Ambiguous grammars, since they have strings with more than one possible -sequence of reductions cannot have deterministic parsers in this sense. -The same is true of languages that require more than one symbol of -lookahead, since the parser lacks the information necessary to make a -decision at the point it must be made in a shift-reduce parser. -Finally, as previously mentioned (*note Mystery Conflicts::), there are -languages where Bison's particular choice of how to summarize the input -seen so far loses necessary information. - - When you use the `%glr-parser' declaration in your grammar file, -Bison generates a parser that uses a different algorithm, called -Generalized LR (or GLR). A Bison GLR parser uses the same basic -algorithm for parsing as an ordinary Bison parser, but behaves -differently in cases where there is a shift-reduce conflict that has not -been resolved by precedence rules (*note Precedence::) or a -reduce-reduce conflict. When a GLR parser encounters such a situation, -it effectively _splits_ into a several parsers, one for each possible -shift or reduction. These parsers then proceed as usual, consuming -tokens in lock-step. Some of the stacks may encounter other conflicts -and split further, with the result that instead of a sequence of states, -a Bison GLR parsing stack is what is in effect a tree of states. - - In effect, each stack represents a guess as to what the proper parse -is. Additional input may indicate that a guess was wrong, in which case -the appropriate stack silently disappears. Otherwise, the semantics -actions generated in each stack are saved, rather than being executed -immediately. When a stack disappears, its saved semantic actions never -get executed. When a reduction causes two stacks to become equivalent, -their sets of semantic actions are both saved with the state that -results from the reduction. We say that two stacks are equivalent when -they both represent the same sequence of states, and each pair of -corresponding states represents a grammar symbol that produces the same -segment of the input token stream. - - Whenever the parser makes a transition from having multiple states -to having one, it reverts to the normal LALR(1) parsing algorithm, -after resolving and executing the saved-up actions. At this -transition, some of the states on the stack will have semantic values -that are sets (actually multisets) of possible actions. The parser -tries to pick one of the actions by first finding one whose rule has -the highest dynamic precedence, as set by the `%dprec' declaration. -Otherwise, if the alternative actions are not ordered by precedence, -but there the same merging function is declared for both rules by the -`%merge' declaration, Bison resolves and evaluates both and then calls -the merge function on the result. Otherwise, it reports an ambiguity. - - It is possible to use a data structure for the GLR parsing tree that -permits the processing of any LALR(1) grammar in linear time (in the -size of the input), any unambiguous (not necessarily LALR(1)) grammar in -quadratic worst-case time, and any general (possibly ambiguous) -context-free grammar in cubic worst-case time. However, Bison currently -uses a simpler data structure that requires time proportional to the -length of the input times the maximum number of stacks required for any -prefix of the input. Thus, really ambiguous or nondeterministic -grammars can require exponential time and space to process. Such badly -behaving examples, however, are not generally of practical interest. -Usually, nondeterminism in a grammar is local--the parser is "in doubt" -only for a few tokens at a time. Therefore, the current data structure -should generally be adequate. On LALR(1) portions of a grammar, in -particular, it is only slightly slower than with the default Bison -parser. - - For a more detailed exposition of GLR parsers, please see: Elizabeth -Scott, Adrian Johnstone and Shamsa Sadaf Hussain, Tomita-Style -Generalised LR Parsers, Royal Holloway, University of London, -Department of Computer Science, TR-00-12, -`http://www.cs.rhul.ac.uk/research/languages/publications/tomita_style_1.ps', -(2000-12-24). - - -File: bison.info, Node: Memory Management, Prev: Generalized LR Parsing, Up: Algorithm - -5.9 Memory Management, and How to Avoid Memory Exhaustion -========================================================= - -The Bison parser stack can run out of memory if too many tokens are -shifted and not reduced. When this happens, the parser function -`yyparse' calls `yyerror' and then returns 2. - - Because Bison parsers have growing stacks, hitting the upper limit -usually results from using a right recursion instead of a left -recursion, *Note Recursive Rules: Recursion. - - By defining the macro `YYMAXDEPTH', you can control how deep the -parser stack can become before memory is exhausted. Define the macro -with a value that is an integer. This value is the maximum number of -tokens that can be shifted (and not reduced) before overflow. - - The stack space allowed is not necessarily allocated. If you -specify a large value for `YYMAXDEPTH', the parser normally allocates a -small stack at first, and then makes it bigger by stages as needed. -This increasing allocation happens automatically and silently. -Therefore, you do not need to make `YYMAXDEPTH' painfully small merely -to save space for ordinary inputs that do not need much stack. - - However, do not allow `YYMAXDEPTH' to be a value so large that -arithmetic overflow could occur when calculating the size of the stack -space. Also, do not allow `YYMAXDEPTH' to be less than `YYINITDEPTH'. - - The default value of `YYMAXDEPTH', if you do not define it, is 10000. - - You can control how much stack is allocated initially by defining the -macro `YYINITDEPTH' to a positive integer. For the C LALR(1) parser, -this value must be a compile-time constant unless you are assuming C99 -or some other target language or compiler that allows variable-length -arrays. The default is 200. - - Do not allow `YYINITDEPTH' to be greater than `YYMAXDEPTH'. - - Because of semantical differences between C and C++, the LALR(1) -parsers in C produced by Bison cannot grow when compiled by C++ -compilers. In this precise case (compiling a C parser as C++) you are -suggested to grow `YYINITDEPTH'. The Bison maintainers hope to fix -this deficiency in a future release. - - -File: bison.info, Node: Error Recovery, Next: Context Dependency, Prev: Algorithm, Up: Top - -6 Error Recovery -**************** - -It is not usually acceptable to have a program terminate on a syntax -error. For example, a compiler should recover sufficiently to parse the -rest of the input file and check it for errors; a calculator should -accept another expression. - - In a simple interactive command parser where each input is one line, -it may be sufficient to allow `yyparse' to return 1 on error and have -the caller ignore the rest of the input line when that happens (and -then call `yyparse' again). But this is inadequate for a compiler, -because it forgets all the syntactic context leading up to the error. -A syntax error deep within a function in the compiler input should not -cause the compiler to treat the following line like the beginning of a -source file. - - You can define how to recover from a syntax error by writing rules to -recognize the special token `error'. This is a terminal symbol that is -always defined (you need not declare it) and reserved for error -handling. The Bison parser generates an `error' token whenever a -syntax error happens; if you have provided a rule to recognize this -token in the current context, the parse can continue. - - For example: - - stmnts: /* empty string */ - | stmnts '\n' - | stmnts exp '\n' - | stmnts error '\n' - - The fourth rule in this example says that an error followed by a -newline makes a valid addition to any `stmnts'. - - What happens if a syntax error occurs in the middle of an `exp'? The -error recovery rule, interpreted strictly, applies to the precise -sequence of a `stmnts', an `error' and a newline. If an error occurs in -the middle of an `exp', there will probably be some additional tokens -and subexpressions on the stack after the last `stmnts', and there will -be tokens to read before the next newline. So the rule is not -applicable in the ordinary way. - - But Bison can force the situation to fit the rule, by discarding -part of the semantic context and part of the input. First it discards -states and objects from the stack until it gets back to a state in -which the `error' token is acceptable. (This means that the -subexpressions already parsed are discarded, back to the last complete -`stmnts'.) At this point the `error' token can be shifted. Then, if -the old lookahead token is not acceptable to be shifted next, the -parser reads tokens and discards them until it finds a token which is -acceptable. In this example, Bison reads and discards input until the -next newline so that the fourth rule can apply. Note that discarded -symbols are possible sources of memory leaks, see *Note Freeing -Discarded Symbols: Destructor Decl, for a means to reclaim this memory. - - The choice of error rules in the grammar is a choice of strategies -for error recovery. A simple and useful strategy is simply to skip the -rest of the current input line or current statement if an error is -detected: - - stmnt: error ';' /* On error, skip until ';' is read. */ - - It is also useful to recover to the matching close-delimiter of an -opening-delimiter that has already been parsed. Otherwise the -close-delimiter will probably appear to be unmatched, and generate -another, spurious error message: - - primary: '(' expr ')' - | '(' error ')' - ... - ; - - Error recovery strategies are necessarily guesses. When they guess -wrong, one syntax error often leads to another. In the above example, -the error recovery rule guesses that an error is due to bad input -within one `stmnt'. Suppose that instead a spurious semicolon is -inserted in the middle of a valid `stmnt'. After the error recovery -rule recovers from the first error, another syntax error will be found -straightaway, since the text following the spurious semicolon is also -an invalid `stmnt'. - - To prevent an outpouring of error messages, the parser will output -no error message for another syntax error that happens shortly after -the first; only after three consecutive input tokens have been -successfully shifted will error messages resume. - - Note that rules which accept the `error' token may have actions, just -as any other rules can. - - You can make error messages resume immediately by using the macro -`yyerrok' in an action. If you do this in the error rule's action, no -error messages will be suppressed. This macro requires no arguments; -`yyerrok;' is a valid C statement. - - The previous lookahead token is reanalyzed immediately after an -error. If this is unacceptable, then the macro `yyclearin' may be used -to clear this token. Write the statement `yyclearin;' in the error -rule's action. *Note Special Features for Use in Actions: Action -Features. - - For example, suppose that on a syntax error, an error handling -routine is called that advances the input stream to some point where -parsing should once again commence. The next symbol returned by the -lexical scanner is probably correct. The previous lookahead token -ought to be discarded with `yyclearin;'. - - The expression `YYRECOVERING ()' yields 1 when the parser is -recovering from a syntax error, and 0 otherwise. Syntax error -diagnostics are suppressed while recovering from a syntax error. - - -File: bison.info, Node: Context Dependency, Next: Debugging, Prev: Error Recovery, Up: Top - -7 Handling Context Dependencies -******************************* - -The Bison paradigm is to parse tokens first, then group them into larger -syntactic units. In many languages, the meaning of a token is affected -by its context. Although this violates the Bison paradigm, certain -techniques (known as "kludges") may enable you to write Bison parsers -for such languages. - -* Menu: - -* Semantic Tokens:: Token parsing can depend on the semantic context. -* Lexical Tie-ins:: Token parsing can depend on the syntactic context. -* Tie-in Recovery:: Lexical tie-ins have implications for how - error recovery rules must be written. - - (Actually, "kludge" means any technique that gets its job done but is -neither clean nor robust.) - - -File: bison.info, Node: Semantic Tokens, Next: Lexical Tie-ins, Up: Context Dependency - -7.1 Semantic Info in Token Types -================================ - -The C language has a context dependency: the way an identifier is used -depends on what its current meaning is. For example, consider this: - - foo (x); - - This looks like a function call statement, but if `foo' is a typedef -name, then this is actually a declaration of `x'. How can a Bison -parser for C decide how to parse this input? - - The method used in GNU C is to have two different token types, -`IDENTIFIER' and `TYPENAME'. When `yylex' finds an identifier, it -looks up the current declaration of the identifier in order to decide -which token type to return: `TYPENAME' if the identifier is declared as -a typedef, `IDENTIFIER' otherwise. - - The grammar rules can then express the context dependency by the -choice of token type to recognize. `IDENTIFIER' is accepted as an -expression, but `TYPENAME' is not. `TYPENAME' can start a declaration, -but `IDENTIFIER' cannot. In contexts where the meaning of the -identifier is _not_ significant, such as in declarations that can -shadow a typedef name, either `TYPENAME' or `IDENTIFIER' is -accepted--there is one rule for each of the two token types. - - This technique is simple to use if the decision of which kinds of -identifiers to allow is made at a place close to where the identifier is -parsed. But in C this is not always so: C allows a declaration to -redeclare a typedef name provided an explicit type has been specified -earlier: - - typedef int foo, bar; - int baz (void) - { - static bar (bar); /* redeclare `bar' as static variable */ - extern foo foo (foo); /* redeclare `foo' as function */ - return foo (bar); - } - - Unfortunately, the name being declared is separated from the -declaration construct itself by a complicated syntactic structure--the -"declarator". - - As a result, part of the Bison parser for C needs to be duplicated, -with all the nonterminal names changed: once for parsing a declaration -in which a typedef name can be redefined, and once for parsing a -declaration in which that can't be done. Here is a part of the -duplication, with actions omitted for brevity: - - initdcl: - declarator maybeasm '=' - init - | declarator maybeasm - ; - - notype_initdcl: - notype_declarator maybeasm '=' - init - | notype_declarator maybeasm - ; - -Here `initdcl' can redeclare a typedef name, but `notype_initdcl' -cannot. The distinction between `declarator' and `notype_declarator' -is the same sort of thing. - - There is some similarity between this technique and a lexical tie-in -(described next), in that information which alters the lexical analysis -is changed during parsing by other parts of the program. The -difference is here the information is global, and is used for other -purposes in the program. A true lexical tie-in has a special-purpose -flag controlled by the syntactic context. - - -File: bison.info, Node: Lexical Tie-ins, Next: Tie-in Recovery, Prev: Semantic Tokens, Up: Context Dependency - -7.2 Lexical Tie-ins -=================== - -One way to handle context-dependency is the "lexical tie-in": a flag -which is set by Bison actions, whose purpose is to alter the way tokens -are parsed. - - For example, suppose we have a language vaguely like C, but with a -special construct `hex (HEX-EXPR)'. After the keyword `hex' comes an -expression in parentheses in which all integers are hexadecimal. In -particular, the token `a1b' must be treated as an integer rather than -as an identifier if it appears in that context. Here is how you can do -it: - - %{ - int hexflag; - int yylex (void); - void yyerror (char const *); - %} - %% - ... - expr: IDENTIFIER - | constant - | HEX '(' - { hexflag = 1; } - expr ')' - { hexflag = 0; - $$ = $4; } - | expr '+' expr - { $$ = make_sum ($1, $3); } - ... - ; - - constant: - INTEGER - | STRING - ; - -Here we assume that `yylex' looks at the value of `hexflag'; when it is -nonzero, all integers are parsed in hexadecimal, and tokens starting -with letters are parsed as integers if possible. - - The declaration of `hexflag' shown in the prologue of the parser file -is needed to make it accessible to the actions (*note The Prologue: -Prologue.). You must also write the code in `yylex' to obey the flag. - - -File: bison.info, Node: Tie-in Recovery, Prev: Lexical Tie-ins, Up: Context Dependency - -7.3 Lexical Tie-ins and Error Recovery -====================================== - -Lexical tie-ins make strict demands on any error recovery rules you -have. *Note Error Recovery::. - - The reason for this is that the purpose of an error recovery rule is -to abort the parsing of one construct and resume in some larger -construct. For example, in C-like languages, a typical error recovery -rule is to skip tokens until the next semicolon, and then start a new -statement, like this: - - stmt: expr ';' - | IF '(' expr ')' stmt { ... } - ... - error ';' - { hexflag = 0; } - ; - - If there is a syntax error in the middle of a `hex (EXPR)' -construct, this error rule will apply, and then the action for the -completed `hex (EXPR)' will never run. So `hexflag' would remain set -for the entire rest of the input, or until the next `hex' keyword, -causing identifiers to be misinterpreted as integers. - - To avoid this problem the error recovery rule itself clears -`hexflag'. - - There may also be an error recovery rule that works within -expressions. For example, there could be a rule which applies within -parentheses and skips to the close-parenthesis: - - expr: ... - | '(' expr ')' - { $$ = $2; } - | '(' error ')' - ... - - If this rule acts within the `hex' construct, it is not going to -abort that construct (since it applies to an inner level of parentheses -within the construct). Therefore, it should not clear the flag: the -rest of the `hex' construct should be parsed with the flag still in -effect. - - What if there is an error recovery rule which might abort out of the -`hex' construct or might not, depending on circumstances? There is no -way you can write the action to determine whether a `hex' construct is -being aborted or not. So if you are using a lexical tie-in, you had -better make sure your error recovery rules are not of this kind. Each -rule must be such that you can be sure that it always will, or always -won't, have to clear the flag. - - -File: bison.info, Node: Debugging, Next: Invocation, Prev: Context Dependency, Up: Top - -8 Debugging Your Parser -*********************** - -Developing a parser can be a challenge, especially if you don't -understand the algorithm (*note The Bison Parser Algorithm: -Algorithm.). Even so, sometimes a detailed description of the automaton -can help (*note Understanding Your Parser: Understanding.), or tracing -the execution of the parser can give some insight on why it behaves -improperly (*note Tracing Your Parser: Tracing.). - -* Menu: - -* Understanding:: Understanding the structure of your parser. -* Tracing:: Tracing the execution of your parser. - - -File: bison.info, Node: Understanding, Next: Tracing, Up: Debugging - -8.1 Understanding Your Parser -============================= - -As documented elsewhere (*note The Bison Parser Algorithm: Algorithm.) -Bison parsers are "shift/reduce automata". In some cases (much more -frequent than one would hope), looking at this automaton is required to -tune or simply fix a parser. Bison provides two different -representation of it, either textually or graphically (as a DOT file). - - The textual file is generated when the options `--report' or -`--verbose' are specified, see *Note Invoking Bison: Invocation. Its -name is made by removing `.tab.c' or `.c' from the parser output file -name, and adding `.output' instead. Therefore, if the input file is -`foo.y', then the parser file is called `foo.tab.c' by default. As a -consequence, the verbose output file is called `foo.output'. - - The following grammar file, `calc.y', will be used in the sequel: - - %token NUM STR - %left '+' '-' - %left '*' - %% - exp: exp '+' exp - | exp '-' exp - | exp '*' exp - | exp '/' exp - | NUM - ; - useless: STR; - %% - - `bison' reports: - - calc.y: warning: 1 nonterminal and 1 rule useless in grammar - calc.y:11.1-7: warning: nonterminal useless in grammar: useless - calc.y:11.10-12: warning: rule useless in grammar: useless: STR - calc.y: conflicts: 7 shift/reduce - - When given `--report=state', in addition to `calc.tab.c', it creates -a file `calc.output' with contents detailed below. The order of the -output and the exact presentation might vary, but the interpretation is -the same. - - The first section includes details on conflicts that were solved -thanks to precedence and/or associativity: - - Conflict in state 8 between rule 2 and token '+' resolved as reduce. - Conflict in state 8 between rule 2 and token '-' resolved as reduce. - Conflict in state 8 between rule 2 and token '*' resolved as shift. -... - - -The next section lists states that still have conflicts. - - State 8 conflicts: 1 shift/reduce - State 9 conflicts: 1 shift/reduce - State 10 conflicts: 1 shift/reduce - State 11 conflicts: 4 shift/reduce - -The next section reports useless tokens, nonterminal and rules. Useless -nonterminals and rules are removed in order to produce a smaller parser, -but useless tokens are preserved, since they might be used by the -scanner (note the difference between "useless" and "unused" below): - - Nonterminals useless in grammar: - useless - - Terminals unused in grammar: - STR - - Rules useless in grammar: - #6 useless: STR; - -The next section reproduces the exact grammar that Bison used: - - Grammar - - Number, Line, Rule - 0 5 $accept -> exp $end - 1 5 exp -> exp '+' exp - 2 6 exp -> exp '-' exp - 3 7 exp -> exp '*' exp - 4 8 exp -> exp '/' exp - 5 9 exp -> NUM - -and reports the uses of the symbols: - - Terminals, with rules where they appear - - $end (0) 0 - '*' (42) 3 - '+' (43) 1 - '-' (45) 2 - '/' (47) 4 - error (256) - NUM (258) 5 - - Nonterminals, with rules where they appear - - $accept (8) - on left: 0 - exp (9) - on left: 1 2 3 4 5, on right: 0 1 2 3 4 - -Bison then proceeds onto the automaton itself, describing each state -with it set of "items", also known as "pointed rules". Each item is a -production rule together with a point (marked by `.') that the input -cursor. - - state 0 - - $accept -> . exp $ (rule 0) - - NUM shift, and go to state 1 - - exp go to state 2 - - This reads as follows: "state 0 corresponds to being at the very -beginning of the parsing, in the initial rule, right before the start -symbol (here, `exp'). When the parser returns to this state right -after having reduced a rule that produced an `exp', the control flow -jumps to state 2. If there is no such transition on a nonterminal -symbol, and the lookahead is a `NUM', then this token is shifted on the -parse stack, and the control flow jumps to state 1. Any other -lookahead triggers a syntax error." - - Even though the only active rule in state 0 seems to be rule 0, the -report lists `NUM' as a lookahead token because `NUM' can be at the -beginning of any rule deriving an `exp'. By default Bison reports the -so-called "core" or "kernel" of the item set, but if you want to see -more detail you can invoke `bison' with `--report=itemset' to list all -the items, include those that can be derived: - - state 0 - - $accept -> . exp $ (rule 0) - exp -> . exp '+' exp (rule 1) - exp -> . exp '-' exp (rule 2) - exp -> . exp '*' exp (rule 3) - exp -> . exp '/' exp (rule 4) - exp -> . NUM (rule 5) - - NUM shift, and go to state 1 - - exp go to state 2 - -In the state 1... - - state 1 - - exp -> NUM . (rule 5) - - $default reduce using rule 5 (exp) - -the rule 5, `exp: NUM;', is completed. Whatever the lookahead token -(`$default'), the parser will reduce it. If it was coming from state -0, then, after this reduction it will return to state 0, and will jump -to state 2 (`exp: go to state 2'). - - state 2 - - $accept -> exp . $ (rule 0) - exp -> exp . '+' exp (rule 1) - exp -> exp . '-' exp (rule 2) - exp -> exp . '*' exp (rule 3) - exp -> exp . '/' exp (rule 4) - - $ shift, and go to state 3 - '+' shift, and go to state 4 - '-' shift, and go to state 5 - '*' shift, and go to state 6 - '/' shift, and go to state 7 - -In state 2, the automaton can only shift a symbol. For instance, -because of the item `exp -> exp . '+' exp', if the lookahead if `+', it -will be shifted on the parse stack, and the automaton control will jump -to state 4, corresponding to the item `exp -> exp '+' . exp'. Since -there is no default action, any other token than those listed above -will trigger a syntax error. - - The state 3 is named the "final state", or the "accepting state": - - state 3 - - $accept -> exp $ . (rule 0) - - $default accept - -the initial rule is completed (the start symbol and the end of input -were read), the parsing exits successfully. - - The interpretation of states 4 to 7 is straightforward, and is left -to the reader. - - state 4 - - exp -> exp '+' . exp (rule 1) - - NUM shift, and go to state 1 - - exp go to state 8 - - state 5 - - exp -> exp '-' . exp (rule 2) - - NUM shift, and go to state 1 - - exp go to state 9 - - state 6 - - exp -> exp '*' . exp (rule 3) - - NUM shift, and go to state 1 - - exp go to state 10 - - state 7 - - exp -> exp '/' . exp (rule 4) - - NUM shift, and go to state 1 - - exp go to state 11 - - As was announced in beginning of the report, `State 8 conflicts: 1 -shift/reduce': - - state 8 - - exp -> exp . '+' exp (rule 1) - exp -> exp '+' exp . (rule 1) - exp -> exp . '-' exp (rule 2) - exp -> exp . '*' exp (rule 3) - exp -> exp . '/' exp (rule 4) - - '*' shift, and go to state 6 - '/' shift, and go to state 7 - - '/' [reduce using rule 1 (exp)] - $default reduce using rule 1 (exp) - - Indeed, there are two actions associated to the lookahead `/': -either shifting (and going to state 7), or reducing rule 1. The -conflict means that either the grammar is ambiguous, or the parser lacks -information to make the right decision. Indeed the grammar is -ambiguous, as, since we did not specify the precedence of `/', the -sentence `NUM + NUM / NUM' can be parsed as `NUM + (NUM / NUM)', which -corresponds to shifting `/', or as `(NUM + NUM) / NUM', which -corresponds to reducing rule 1. - - Because in LALR(1) parsing a single decision can be made, Bison -arbitrarily chose to disable the reduction, see *Note Shift/Reduce -Conflicts: Shift/Reduce. Discarded actions are reported in between -square brackets. - - Note that all the previous states had a single possible action: -either shifting the next token and going to the corresponding state, or -reducing a single rule. In the other cases, i.e., when shifting _and_ -reducing is possible or when _several_ reductions are possible, the -lookahead is required to select the action. State 8 is one such state: -if the lookahead is `*' or `/' then the action is shifting, otherwise -the action is reducing rule 1. In other words, the first two items, -corresponding to rule 1, are not eligible when the lookahead token is -`*', since we specified that `*' has higher precedence than `+'. More -generally, some items are eligible only with some set of possible -lookahead tokens. When run with `--report=lookahead', Bison specifies -these lookahead tokens: - - state 8 - - exp -> exp . '+' exp (rule 1) - exp -> exp '+' exp . [$, '+', '-', '/'] (rule 1) - exp -> exp . '-' exp (rule 2) - exp -> exp . '*' exp (rule 3) - exp -> exp . '/' exp (rule 4) - - '*' shift, and go to state 6 - '/' shift, and go to state 7 - - '/' [reduce using rule 1 (exp)] - $default reduce using rule 1 (exp) - - The remaining states are similar: - - state 9 - - exp -> exp . '+' exp (rule 1) - exp -> exp . '-' exp (rule 2) - exp -> exp '-' exp . (rule 2) - exp -> exp . '*' exp (rule 3) - exp -> exp . '/' exp (rule 4) - - '*' shift, and go to state 6 - '/' shift, and go to state 7 - - '/' [reduce using rule 2 (exp)] - $default reduce using rule 2 (exp) - - state 10 - - exp -> exp . '+' exp (rule 1) - exp -> exp . '-' exp (rule 2) - exp -> exp . '*' exp (rule 3) - exp -> exp '*' exp . (rule 3) - exp -> exp . '/' exp (rule 4) - - '/' shift, and go to state 7 - - '/' [reduce using rule 3 (exp)] - $default reduce using rule 3 (exp) - - state 11 - - exp -> exp . '+' exp (rule 1) - exp -> exp . '-' exp (rule 2) - exp -> exp . '*' exp (rule 3) - exp -> exp . '/' exp (rule 4) - exp -> exp '/' exp . (rule 4) - - '+' shift, and go to state 4 - '-' shift, and go to state 5 - '*' shift, and go to state 6 - '/' shift, and go to state 7 - - '+' [reduce using rule 4 (exp)] - '-' [reduce using rule 4 (exp)] - '*' [reduce using rule 4 (exp)] - '/' [reduce using rule 4 (exp)] - $default reduce using rule 4 (exp) - -Observe that state 11 contains conflicts not only due to the lack of -precedence of `/' with respect to `+', `-', and `*', but also because -the associativity of `/' is not specified. - - -File: bison.info, Node: Tracing, Prev: Understanding, Up: Debugging - -8.2 Tracing Your Parser -======================= - -If a Bison grammar compiles properly but doesn't do what you want when -it runs, the `yydebug' parser-trace feature can help you figure out why. - - There are several means to enable compilation of trace facilities: - -the macro `YYDEBUG' - Define the macro `YYDEBUG' to a nonzero value when you compile the - parser. This is compliant with POSIX Yacc. You could use - `-DYYDEBUG=1' as a compiler option or you could put `#define - YYDEBUG 1' in the prologue of the grammar file (*note The - Prologue: Prologue.). - -the option `-t', `--debug' - Use the `-t' option when you run Bison (*note Invoking Bison: - Invocation.). This is POSIX compliant too. - -the directive `%debug' - Add the `%debug' directive (*note Bison Declaration Summary: Decl - Summary.). This is a Bison extension, which will prove useful - when Bison will output parsers for languages that don't use a - preprocessor. Unless POSIX and Yacc portability matter to you, - this is the preferred solution. - - We suggest that you always enable the debug option so that debugging -is always possible. - - The trace facility outputs messages with macro calls of the form -`YYFPRINTF (stderr, FORMAT, ARGS)' where FORMAT and ARGS are the usual -`printf' format and variadic arguments. If you define `YYDEBUG' to a -nonzero value but do not define `YYFPRINTF', `<stdio.h>' is -automatically included and `YYFPRINTF' is defined to `fprintf'. - - Once you have compiled the program with trace facilities, the way to -request a trace is to store a nonzero value in the variable `yydebug'. -You can do this by making the C code do it (in `main', perhaps), or you -can alter the value with a C debugger. - - Each step taken by the parser when `yydebug' is nonzero produces a -line or two of trace information, written on `stderr'. The trace -messages tell you these things: - - * Each time the parser calls `yylex', what kind of token was read. - - * Each time a token is shifted, the depth and complete contents of - the state stack (*note Parser States::). - - * Each time a rule is reduced, which rule it is, and the complete - contents of the state stack afterward. - - To make sense of this information, it helps to refer to the listing -file produced by the Bison `-v' option (*note Invoking Bison: -Invocation.). This file shows the meaning of each state in terms of -positions in various rules, and also what each state will do with each -possible input token. As you read the successive trace messages, you -can see that the parser is functioning according to its specification in -the listing file. Eventually you will arrive at the place where -something undesirable happens, and you will see which parts of the -grammar are to blame. - - The parser file is a C program and you can use C debuggers on it, -but it's not easy to interpret what it is doing. The parser function -is a finite-state machine interpreter, and aside from the actions it -executes the same code over and over. Only the values of variables -show where in the grammar it is working. - - The debugging information normally gives the token type of each token -read, but not its semantic value. You can optionally define a macro -named `YYPRINT' to provide a way to print the value. If you define -`YYPRINT', it should take three arguments. The parser will pass a -standard I/O stream, the numeric code for the token type, and the token -value (from `yylval'). - - Here is an example of `YYPRINT' suitable for the multi-function -calculator (*note Declarations for `mfcalc': Mfcalc Declarations.): - - %{ - static void print_token_value (FILE *, int, YYSTYPE); - #define YYPRINT(file, type, value) print_token_value (file, type, value) - %} - - ... %% ... %% ... - - static void - print_token_value (FILE *file, int type, YYSTYPE value) - { - if (type == VAR) - fprintf (file, "%s", value.tptr->name); - else if (type == NUM) - fprintf (file, "%d", value.val); - } - - -File: bison.info, Node: Invocation, Next: Other Languages, Prev: Debugging, Up: Top - -9 Invoking Bison -**************** - -The usual way to invoke Bison is as follows: - - bison INFILE - - Here INFILE is the grammar file name, which usually ends in `.y'. -The parser file's name is made by replacing the `.y' with `.tab.c' and -removing any leading directory. Thus, the `bison foo.y' file name -yields `foo.tab.c', and the `bison hack/foo.y' file name yields -`foo.tab.c'. It's also possible, in case you are writing C++ code -instead of C in your grammar file, to name it `foo.ypp' or `foo.y++'. -Then, the output files will take an extension like the given one as -input (respectively `foo.tab.cpp' and `foo.tab.c++'). This feature -takes effect with all options that manipulate file names like `-o' or -`-d'. - - For example : - - bison -d INFILE.YXX - will produce `infile.tab.cxx' and `infile.tab.hxx', and - - bison -d -o OUTPUT.C++ INFILE.Y - will produce `output.c++' and `outfile.h++'. - - For compatibility with POSIX, the standard Bison distribution also -contains a shell script called `yacc' that invokes Bison with the `-y' -option. - -* Menu: - -* Bison Options:: All the options described in detail, - in alphabetical order by short options. -* Option Cross Key:: Alphabetical list of long options. -* Yacc Library:: Yacc-compatible `yylex' and `main'. - - -File: bison.info, Node: Bison Options, Next: Option Cross Key, Up: Invocation - -9.1 Bison Options -================= - -Bison supports both traditional single-letter options and mnemonic long -option names. Long option names are indicated with `--' instead of -`-'. Abbreviations for option names are allowed as long as they are -unique. When a long option takes an argument, like `--file-prefix', -connect the option name and the argument with `='. - - Here is a list of options that can be used with Bison, alphabetized -by short option. It is followed by a cross key alphabetized by long -option. - -Operations modes: -`-h' -`--help' - Print a summary of the command-line options to Bison and exit. - -`-V' -`--version' - Print the version number of Bison and exit. - -`--print-localedir' - Print the name of the directory containing locale-dependent data. - -`--print-datadir' - Print the name of the directory containing skeletons and XSLT. - -`-y' -`--yacc' - Act more like the traditional Yacc command. This can cause - different diagnostics to be generated, and may change behavior in - other minor ways. Most importantly, imitate Yacc's output file - name conventions, so that the parser output file is called - `y.tab.c', and the other outputs are called `y.output' and - `y.tab.h'. Also, if generating an LALR(1) parser in C, generate - `#define' statements in addition to an `enum' to associate token - numbers with token names. Thus, the following shell script can - substitute for Yacc, and the Bison distribution contains such a - script for compatibility with POSIX: - - #! /bin/sh - bison -y "$@" - - The `-y'/`--yacc' option is intended for use with traditional Yacc - grammars. If your grammar uses a Bison extension like - `%glr-parser', Bison might not be Yacc-compatible even if this - option is specified. - -`-W' -`--warnings' - Output warnings falling in CATEGORY. CATEGORY can be one of: - `midrule-values' - Warn about mid-rule values that are set but not used within - any of the actions of the parent rule. For example, warn - about unused `$2' in: - - exp: '1' { $$ = 1; } '+' exp { $$ = $1 + $4; }; - - Also warn about mid-rule values that are used but not set. - For example, warn about unset `$$' in the mid-rule action in: - - exp: '1' { $1 = 1; } '+' exp { $$ = $2 + $4; }; - - These warnings are not enabled by default since they - sometimes prove to be false alarms in existing grammars - employing the Yacc constructs `$0' or `$-N' (where N is some - positive integer). - - `yacc' - Incompatibilities with POSIX Yacc. - - `all' - All the warnings. - - `none' - Turn off all the warnings. - - `error' - Treat warnings as errors. - - A category can be turned off by prefixing its name with `no-'. For - instance, `-Wno-syntax' will hide the warnings about unused - variables. - -Tuning the parser: - -`-t' -`--debug' - In the parser file, define the macro `YYDEBUG' to 1 if it is not - already defined, so that the debugging facilities are compiled. - *Note Tracing Your Parser: Tracing. - -`-L LANGUAGE' -`--language=LANGUAGE' - Specify the programming language for the generated parser, as if - `%language' was specified (*note Bison Declaration Summary: Decl - Summary.). Currently supported languages include C, C++, and Java. - LANGUAGE is case-insensitive. - - This option is experimental and its effect may be modified in - future releases. - -`--locations' - Pretend that `%locations' was specified. *Note Decl Summary::. - -`-p PREFIX' -`--name-prefix=PREFIX' - Pretend that `%name-prefix "PREFIX"' was specified. *Note Decl - Summary::. - -`-l' -`--no-lines' - Don't put any `#line' preprocessor commands in the parser file. - Ordinarily Bison puts them in the parser file so that the C - compiler and debuggers will associate errors with your source - file, the grammar file. This option causes them to associate - errors with the parser file, treating it as an independent source - file in its own right. - -`-S FILE' -`--skeleton=FILE' - Specify the skeleton to use, similar to `%skeleton' (*note Bison - Declaration Summary: Decl Summary.). - - If FILE does not contain a `/', FILE is the name of a skeleton - file in the Bison installation directory. If it does, FILE is an - absolute file name or a file name relative to the current working - directory. This is similar to how most shells resolve commands. - -`-k' -`--token-table' - Pretend that `%token-table' was specified. *Note Decl Summary::. - -Adjust the output: - -`--defines[=FILE]' - Pretend that `%defines' was specified, i.e., write an extra output - file containing macro definitions for the token type names defined - in the grammar, as well as a few other declarations. *Note Decl - Summary::. - -`-d' - This is the same as `--defines' except `-d' does not accept a FILE - argument since POSIX Yacc requires that `-d' can be bundled with - other short options. - -`-b FILE-PREFIX' -`--file-prefix=PREFIX' - Pretend that `%file-prefix' was specified, i.e., specify prefix to - use for all Bison output file names. *Note Decl Summary::. - -`-r THINGS' -`--report=THINGS' - Write an extra output file containing verbose description of the - comma separated list of THINGS among: - - `state' - Description of the grammar, conflicts (resolved and - unresolved), and LALR automaton. - - `lookahead' - Implies `state' and augments the description of the automaton - with each rule's lookahead set. - - `itemset' - Implies `state' and augments the description of the automaton - with the full set of items for each state, instead of its - core only. - -`--report-file=FILE' - Specify the FILE for the verbose description. - -`-v' -`--verbose' - Pretend that `%verbose' was specified, i.e., write an extra output - file containing verbose descriptions of the grammar and parser. - *Note Decl Summary::. - -`-o FILE' -`--output=FILE' - Specify the FILE for the parser file. - - The other output files' names are constructed from FILE as - described under the `-v' and `-d' options. - -`-g[FILE]' -`--graph[=FILE]' - Output a graphical representation of the LALR(1) grammar automaton - computed by Bison, in Graphviz (http://www.graphviz.org/) DOT - (http://www.graphviz.org/doc/info/lang.html) format. `FILE' is - optional. If omitted and the grammar file is `foo.y', the output - file will be `foo.dot'. - -`-x[FILE]' -`--xml[=FILE]' - Output an XML report of the LALR(1) automaton computed by Bison. - `FILE' is optional. If omitted and the grammar file is `foo.y', - the output file will be `foo.xml'. (The current XML schema is - experimental and may evolve. More user feedback will help to - stabilize it.) - - -File: bison.info, Node: Option Cross Key, Next: Yacc Library, Prev: Bison Options, Up: Invocation - -9.2 Option Cross Key -==================== - -Here is a list of options, alphabetized by long option, to help you find -the corresponding short option. - -Long Option Short Option -------------------------------------------------- -`--debug' `-t' -`--defines=[FILE]' -`--file-prefix=PREFIX' `-b' PREFIX -`--graph=[FILE]' `-g' [FILE] -`--help' `-h' -`--language=LANGUAGE' `-L' LANGUAGE -`--locations' -`--name-prefix=PREFIX' `-p' PREFIX -`--no-lines' `-l' -`--output=FILE' `-o' FILE -`--print-datadir' -`--print-localedir' -`--report-file=FILE' -`--report=THINGS' `-r' THINGS -`--skeleton=FILE' `-S' FILE -`--token-table' `-k' -`--verbose' `-v' -`--version' `-V' -`--warnings' `-W' -`--xml=[FILE]' `-x' [FILE] -`--yacc' `-y' - - -File: bison.info, Node: Yacc Library, Prev: Option Cross Key, Up: Invocation - -9.3 Yacc Library -================ - -The Yacc library contains default implementations of the `yyerror' and -`main' functions. These default implementations are normally not -useful, but POSIX requires them. To use the Yacc library, link your -program with the `-ly' option. Note that Bison's implementation of the -Yacc library is distributed under the terms of the GNU General Public -License (*note Copying::). - - If you use the Yacc library's `yyerror' function, you should declare -`yyerror' as follows: - - int yyerror (char const *); - - Bison ignores the `int' value returned by this `yyerror'. If you -use the Yacc library's `main' function, your `yyparse' function should -have the following type signature: - - int yyparse (void); - - -File: bison.info, Node: Other Languages, Next: FAQ, Prev: Invocation, Up: Top - -10 Parsers Written In Other Languages -************************************* - -* Menu: - -* C++ Parsers:: The interface to generate C++ parser classes -* Java Parsers:: The interface to generate Java parser classes - - -File: bison.info, Node: C++ Parsers, Next: Java Parsers, Up: Other Languages - -10.1 C++ Parsers -================ - -* Menu: - -* C++ Bison Interface:: Asking for C++ parser generation -* C++ Semantic Values:: %union vs. C++ -* C++ Location Values:: The position and location classes -* C++ Parser Interface:: Instantiating and running the parser -* C++ Scanner Interface:: Exchanges between yylex and parse -* A Complete C++ Example:: Demonstrating their use - - -File: bison.info, Node: C++ Bison Interface, Next: C++ Semantic Values, Up: C++ Parsers - -10.1.1 C++ Bison Interface --------------------------- - -The C++ LALR(1) parser is selected using the skeleton directive, -`%skeleton "lalr1.c"', or the synonymous command-line option -`--skeleton=lalr1.c'. *Note Decl Summary::. - - When run, `bison' will create several entities in the `yy' namespace. Use -the `%define namespace' directive to change the namespace name, see -*Note Decl Summary::. The various classes are generated in the -following files: - -`position.hh' -`location.hh' - The definition of the classes `position' and `location', used for - location tracking. *Note C++ Location Values::. - -`stack.hh' - An auxiliary class `stack' used by the parser. - -`FILE.hh' -`FILE.cc' - (Assuming the extension of the input file was `.yy'.) The - declaration and implementation of the C++ parser class. The - basename and extension of these two files follow the same rules as - with regular C parsers (*note Invocation::). - - The header is _mandatory_; you must either pass `-d'/`--defines' - to `bison', or use the `%defines' directive. - - All these files are documented using Doxygen; run `doxygen' for a -complete and accurate documentation. - - -File: bison.info, Node: C++ Semantic Values, Next: C++ Location Values, Prev: C++ Bison Interface, Up: C++ Parsers - -10.1.2 C++ Semantic Values --------------------------- - -The `%union' directive works as for C, see *Note The Collection of -Value Types: Union Decl. In particular it produces a genuine -`union'(1), which have a few specific features in C++. - - The type `YYSTYPE' is defined but its use is discouraged: rather - you should refer to the parser's encapsulated type - `yy::parser::semantic_type'. - - - Non POD (Plain Old Data) types cannot be used. C++ forbids any - instance of classes with constructors in unions: only _pointers_ - to such objects are allowed. - - Because objects have to be stored via pointers, memory is not -reclaimed automatically: using the `%destructor' directive is the only -means to avoid leaks. *Note Freeing Discarded Symbols: Destructor Decl. - - ---------- Footnotes ---------- - - (1) In the future techniques to allow complex types within -pseudo-unions (similar to Boost variants) might be implemented to -alleviate these issues. - - -File: bison.info, Node: C++ Location Values, Next: C++ Parser Interface, Prev: C++ Semantic Values, Up: C++ Parsers - -10.1.3 C++ Location Values --------------------------- - -When the directive `%locations' is used, the C++ parser supports -location tracking, see *Note Locations Overview: Locations. Two -auxiliary classes define a `position', a single point in a file, and a -`location', a range composed of a pair of `position's (possibly -spanning several files). - - -- Method on position: std::string* file - The name of the file. It will always be handled as a pointer, the - parser will never duplicate nor deallocate it. As an experimental - feature you may change it to `TYPE*' using `%define filename_type - "TYPE"'. - - -- Method on position: unsigned int line - The line, starting at 1. - - -- Method on position: unsigned int lines (int HEIGHT = 1) - Advance by HEIGHT lines, resetting the column number. - - -- Method on position: unsigned int column - The column, starting at 0. - - -- Method on position: unsigned int columns (int WIDTH = 1) - Advance by WIDTH columns, without changing the line number. - - -- Method on position: position& operator+= (position& POS, int WIDTH) - -- Method on position: position operator+ (const position& POS, int - WIDTH) - -- Method on position: position& operator-= (const position& POS, int - WIDTH) - -- Method on position: position operator- (position& POS, int WIDTH) - Various forms of syntactic sugar for `columns'. - - -- Method on position: position operator<< (std::ostream O, const - position& P) - Report P on O like this: `FILE:LINE.COLUMN', or `LINE.COLUMN' if - FILE is null. - - -- Method on location: position begin - -- Method on location: position end - The first, inclusive, position of the range, and the first beyond. - - -- Method on location: unsigned int columns (int WIDTH = 1) - -- Method on location: unsigned int lines (int HEIGHT = 1) - Advance the `end' position. - - -- Method on location: location operator+ (const location& BEGIN, - const location& END) - -- Method on location: location operator+ (const location& BEGIN, int - WIDTH) - -- Method on location: location operator+= (const location& LOC, int - WIDTH) - Various forms of syntactic sugar. - - -- Method on location: void step () - Move `begin' onto `end'. - - -File: bison.info, Node: C++ Parser Interface, Next: C++ Scanner Interface, Prev: C++ Location Values, Up: C++ Parsers - -10.1.4 C++ Parser Interface ---------------------------- - -The output files `OUTPUT.hh' and `OUTPUT.cc' declare and define the -parser class in the namespace `yy'. The class name defaults to -`parser', but may be changed using `%define parser_class_name "NAME"'. -The interface of this class is detailed below. It can be extended -using the `%parse-param' feature: its semantics is slightly changed -since it describes an additional member of the parser class, and an -additional argument for its constructor. - - -- Type of parser: semantic_value_type - -- Type of parser: location_value_type - The types for semantics value and locations. - - -- Method on parser: parser (TYPE1 ARG1, ...) - Build a new parser object. There are no arguments by default, - unless `%parse-param {TYPE1 ARG1}' was used. - - -- Method on parser: int parse () - Run the syntactic analysis, and return 0 on success, 1 otherwise. - - -- Method on parser: std::ostream& debug_stream () - -- Method on parser: void set_debug_stream (std::ostream& O) - Get or set the stream used for tracing the parsing. It defaults to - `std::cerr'. - - -- Method on parser: debug_level_type debug_level () - -- Method on parser: void set_debug_level (debug_level L) - Get or set the tracing level. Currently its value is either 0, no - trace, or nonzero, full tracing. - - -- Method on parser: void error (const location_type& L, const - std::string& M) - The definition for this member function must be supplied by the - user: the parser uses it to report a parser error occurring at L, - described by M. - - -File: bison.info, Node: C++ Scanner Interface, Next: A Complete C++ Example, Prev: C++ Parser Interface, Up: C++ Parsers - -10.1.5 C++ Scanner Interface ----------------------------- - -The parser invokes the scanner by calling `yylex'. Contrary to C -parsers, C++ parsers are always pure: there is no point in using the -`%define api.pure' directive. Therefore the interface is as follows. - - -- Method on parser: int yylex (semantic_value_type& YYLVAL, - location_type& YYLLOC, TYPE1 ARG1, ...) - Return the next token. Its type is the return value, its semantic - value and location being YYLVAL and YYLLOC. Invocations of - `%lex-param {TYPE1 ARG1}' yield additional arguments. - - -File: bison.info, Node: A Complete C++ Example, Prev: C++ Scanner Interface, Up: C++ Parsers - -10.1.6 A Complete C++ Example ------------------------------ - -This section demonstrates the use of a C++ parser with a simple but -complete example. This example should be available on your system, -ready to compile, in the directory "../bison/examples/calc++". It -focuses on the use of Bison, therefore the design of the various C++ -classes is very naive: no accessors, no encapsulation of members etc. -We will use a Lex scanner, and more precisely, a Flex scanner, to -demonstrate the various interaction. A hand written scanner is -actually easier to interface with. - -* Menu: - -* Calc++ --- C++ Calculator:: The specifications -* Calc++ Parsing Driver:: An active parsing context -* Calc++ Parser:: A parser class -* Calc++ Scanner:: A pure C++ Flex scanner -* Calc++ Top Level:: Conducting the band - - -File: bison.info, Node: Calc++ --- C++ Calculator, Next: Calc++ Parsing Driver, Up: A Complete C++ Example - -10.1.6.1 Calc++ -- C++ Calculator -................................. - -Of course the grammar is dedicated to arithmetics, a single expression, -possibly preceded by variable assignments. An environment containing -possibly predefined variables such as `one' and `two', is exchanged -with the parser. An example of valid input follows. - - three := 3 - seven := one + two * three - seven * seven - - -File: bison.info, Node: Calc++ Parsing Driver, Next: Calc++ Parser, Prev: Calc++ --- C++ Calculator, Up: A Complete C++ Example - -10.1.6.2 Calc++ Parsing Driver -.............................. - -To support a pure interface with the parser (and the scanner) the -technique of the "parsing context" is convenient: a structure -containing all the data to exchange. Since, in addition to simply -launch the parsing, there are several auxiliary tasks to execute (open -the file for parsing, instantiate the parser etc.), we recommend -transforming the simple parsing context structure into a fully blown -"parsing driver" class. - - The declaration of this driver class, `calc++-driver.hh', is as -follows. The first part includes the CPP guard and imports the -required standard library components, and the declaration of the parser -class. - - #ifndef CALCXX_DRIVER_HH - # define CALCXX_DRIVER_HH - # include <string> - # include <map> - # include "calc++-parser.hh" - -Then comes the declaration of the scanning function. Flex expects the -signature of `yylex' to be defined in the macro `YY_DECL', and the C++ -parser expects it to be declared. We can factor both as follows. - - // Tell Flex the lexer's prototype ... - # define YY_DECL \ - yy::calcxx_parser::token_type \ - yylex (yy::calcxx_parser::semantic_type* yylval, \ - yy::calcxx_parser::location_type* yylloc, \ - calcxx_driver& driver) - // ... and declare it for the parser's sake. - YY_DECL; - -The `calcxx_driver' class is then declared with its most obvious -members. - - // Conducting the whole scanning and parsing of Calc++. - class calcxx_driver - { - public: - calcxx_driver (); - virtual ~calcxx_driver (); - - std::map<std::string, int> variables; - - int result; - -To encapsulate the coordination with the Flex scanner, it is useful to -have two members function to open and close the scanning phase. - - // Handling the scanner. - void scan_begin (); - void scan_end (); - bool trace_scanning; - -Similarly for the parser itself. - - // Run the parser. Return 0 on success. - int parse (const std::string& f); - std::string file; - bool trace_parsing; - -To demonstrate pure handling of parse errors, instead of simply dumping -them on the standard error output, we will pass them to the compiler -driver using the following two member functions. Finally, we close the -class declaration and CPP guard. - - // Error handling. - void error (const yy::location& l, const std::string& m); - void error (const std::string& m); - }; - #endif // ! CALCXX_DRIVER_HH - - The implementation of the driver is straightforward. The `parse' -member function deserves some attention. The `error' functions are -simple stubs, they should actually register the located error messages -and set error state. - - #include "calc++-driver.hh" - #include "calc++-parser.hh" - - calcxx_driver::calcxx_driver () - : trace_scanning (false), trace_parsing (false) - { - variables["one"] = 1; - variables["two"] = 2; - } - - calcxx_driver::~calcxx_driver () - { - } - - int - calcxx_driver::parse (const std::string &f) - { - file = f; - scan_begin (); - yy::calcxx_parser parser (*this); - parser.set_debug_level (trace_parsing); - int res = parser.parse (); - scan_end (); - return res; - } - - void - calcxx_driver::error (const yy::location& l, const std::string& m) - { - std::cerr << l << ": " << m << std::endl; - } - - void - calcxx_driver::error (const std::string& m) - { - std::cerr << m << std::endl; - } - - -File: bison.info, Node: Calc++ Parser, Next: Calc++ Scanner, Prev: Calc++ Parsing Driver, Up: A Complete C++ Example - -10.1.6.3 Calc++ Parser -...................... - -The parser definition file `calc++-parser.yy' starts by asking for the -C++ LALR(1) skeleton, the creation of the parser header file, and -specifies the name of the parser class. Because the C++ skeleton -changed several times, it is safer to require the version you designed -the grammar for. - - %skeleton "lalr1.cc" /* -*- C++ -*- */ - %require "2.4.1" - %defines - %define parser_class_name "calcxx_parser" - -Then come the declarations/inclusions needed to define the `%union'. -Because the parser uses the parsing driver and reciprocally, both -cannot include the header of the other. Because the driver's header -needs detailed knowledge about the parser class (in particular its -inner types), it is the parser's header which will simply use a forward -declaration of the driver. *Note %code: Decl Summary. - - %code requires { - # include <string> - class calcxx_driver; - } - -The driver is passed by reference to the parser and to the scanner. -This provides a simple but effective pure interface, not relying on -global variables. - - // The parsing context. - %parse-param { calcxx_driver& driver } - %lex-param { calcxx_driver& driver } - -Then we request the location tracking feature, and initialize the first -location's file name. Afterwards new locations are computed relatively -to the previous locations: the file name will be automatically -propagated. - - %locations - %initial-action - { - // Initialize the initial location. - @$.begin.filename = @$.end.filename = &driver.file; - }; - -Use the two following directives to enable parser tracing and verbose -error messages. - - %debug - %error-verbose - -Semantic values cannot use "real" objects, but only pointers to them. - - // Symbols. - %union - { - int ival; - std::string *sval; - }; - -The code between `%code {' and `}' is output in the `*.cc' file; it -needs detailed knowledge about the driver. - - %code { - # include "calc++-driver.hh" - } - -The token numbered as 0 corresponds to end of file; the following line -allows for nicer error messages referring to "end of file" instead of -"$end". Similarly user friendly named are provided for each symbol. -Note that the tokens names are prefixed by `TOKEN_' to avoid name -clashes. - - %token END 0 "end of file" - %token ASSIGN ":=" - %token <sval> IDENTIFIER "identifier" - %token <ival> NUMBER "number" - %type <ival> exp - -To enable memory deallocation during error recovery, use `%destructor'. - - %printer { debug_stream () << *$$; } "identifier" - %destructor { delete $$; } "identifier" - - %printer { debug_stream () << $$; } <ival> - -The grammar itself is straightforward. - - %% - %start unit; - unit: assignments exp { driver.result = $2; }; - - assignments: assignments assignment {} - | /* Nothing. */ {}; - - assignment: - "identifier" ":=" exp - { driver.variables[*$1] = $3; delete $1; }; - - %left '+' '-'; - %left '*' '/'; - exp: exp '+' exp { $$ = $1 + $3; } - | exp '-' exp { $$ = $1 - $3; } - | exp '*' exp { $$ = $1 * $3; } - | exp '/' exp { $$ = $1 / $3; } - | "identifier" { $$ = driver.variables[*$1]; delete $1; } - | "number" { $$ = $1; }; - %% - -Finally the `error' member function registers the errors to the driver. - - void - yy::calcxx_parser::error (const yy::calcxx_parser::location_type& l, - const std::string& m) - { - driver.error (l, m); - } - - -File: bison.info, Node: Calc++ Scanner, Next: Calc++ Top Level, Prev: Calc++ Parser, Up: A Complete C++ Example - -10.1.6.4 Calc++ Scanner -....................... - -The Flex scanner first includes the driver declaration, then the -parser's to get the set of defined tokens. - - %{ /* -*- C++ -*- */ - # include <cstdlib> - # include <errno.h> - # include <limits.h> - # include <string> - # include "calc++-driver.hh" - # include "calc++-parser.hh" - - /* Work around an incompatibility in flex (at least versions - 2.5.31 through 2.5.33): it generates code that does - not conform to C89. See Debian bug 333231 - <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=333231>. */ - # undef yywrap - # define yywrap() 1 - - /* By default yylex returns int, we use token_type. - Unfortunately yyterminate by default returns 0, which is - not of token_type. */ - #define yyterminate() return token::END - %} - -Because there is no `#include'-like feature we don't need `yywrap', we -don't need `unput' either, and we parse an actual file, this is not an -interactive session with the user. Finally we enable the scanner -tracing features. - - %option noyywrap nounput batch debug - -Abbreviations allow for more readable rules. - - id [a-zA-Z][a-zA-Z_0-9]* - int [0-9]+ - blank [ \t] - -The following paragraph suffices to track locations accurately. Each -time `yylex' is invoked, the begin position is moved onto the end -position. Then when a pattern is matched, the end position is advanced -of its width. In case it matched ends of lines, the end cursor is -adjusted, and each time blanks are matched, the begin cursor is moved -onto the end cursor to effectively ignore the blanks preceding tokens. -Comments would be treated equally. - - %{ - # define YY_USER_ACTION yylloc->columns (yyleng); - %} - %% - %{ - yylloc->step (); - %} - {blank}+ yylloc->step (); - [\n]+ yylloc->lines (yyleng); yylloc->step (); - -The rules are simple, just note the use of the driver to report errors. -It is convenient to use a typedef to shorten -`yy::calcxx_parser::token::identifier' into `token::identifier' for -instance. - - %{ - typedef yy::calcxx_parser::token token; - %} - /* Convert ints to the actual type of tokens. */ - [-+*/] return yy::calcxx_parser::token_type (yytext[0]); - ":=" return token::ASSIGN; - {int} { - errno = 0; - long n = strtol (yytext, NULL, 10); - if (! (INT_MIN <= n && n <= INT_MAX && errno != ERANGE)) - driver.error (*yylloc, "integer is out of range"); - yylval->ival = n; - return token::NUMBER; - } - {id} yylval->sval = new std::string (yytext); return token::IDENTIFIER; - . driver.error (*yylloc, "invalid character"); - %% - -Finally, because the scanner related driver's member function depend on -the scanner's data, it is simpler to implement them in this file. - - void - calcxx_driver::scan_begin () - { - yy_flex_debug = trace_scanning; - if (file == "-") - yyin = stdin; - else if (!(yyin = fopen (file.c_str (), "r"))) - { - error (std::string ("cannot open ") + file); - exit (1); - } - } - - void - calcxx_driver::scan_end () - { - fclose (yyin); - } - - -File: bison.info, Node: Calc++ Top Level, Prev: Calc++ Scanner, Up: A Complete C++ Example - -10.1.6.5 Calc++ Top Level -......................... - -The top level file, `calc++.cc', poses no problem. - - #include <iostream> - #include "calc++-driver.hh" - - int - main (int argc, char *argv[]) - { - calcxx_driver driver; - for (++argv; argv[0]; ++argv) - if (*argv == std::string ("-p")) - driver.trace_parsing = true; - else if (*argv == std::string ("-s")) - driver.trace_scanning = true; - else if (!driver.parse (*argv)) - std::cout << driver.result << std::endl; - } - - -File: bison.info, Node: Java Parsers, Prev: C++ Parsers, Up: Other Languages - -10.2 Java Parsers -================= - -* Menu: - -* Java Bison Interface:: Asking for Java parser generation -* Java Semantic Values:: %type and %token vs. Java -* Java Location Values:: The position and location classes -* Java Parser Interface:: Instantiating and running the parser -* Java Scanner Interface:: Specifying the scanner for the parser -* Java Action Features:: Special features for use in actions -* Java Differences:: Differences between C/C++ and Java Grammars -* Java Declarations Summary:: List of Bison declarations used with Java - - -File: bison.info, Node: Java Bison Interface, Next: Java Semantic Values, Up: Java Parsers - -10.2.1 Java Bison Interface ---------------------------- - -(The current Java interface is experimental and may evolve. More user -feedback will help to stabilize it.) - - The Java parser skeletons are selected using the `%language "Java"' -directive or the `-L java'/`--language=java' option. - - When generating a Java parser, `bison BASENAME.y' will create a -single Java source file named `BASENAME.java'. Using an input file -without a `.y' suffix is currently broken. The basename of the output -file can be changed by the `%file-prefix' directive or the -`-p'/`--name-prefix' option. The entire output file name can be -changed by the `%output' directive or the `-o'/`--output' option. The -output file contains a single class for the parser. - - You can create documentation for generated parsers using Javadoc. - - Contrary to C parsers, Java parsers do not use global variables; the -state of the parser is always local to an instance of the parser class. -Therefore, all Java parsers are "pure", and the `%pure-parser' and -`%define api.pure' directives does not do anything when used in Java. - - Push parsers are currently unsupported in Java and `%define -api.push_pull' have no effect. - - GLR parsers are currently unsupported in Java. Do not use the -`glr-parser' directive. - - No header file can be generated for Java parsers. Do not use the -`%defines' directive or the `-d'/`--defines' options. - - Currently, support for debugging and verbose errors are always -compiled in. Thus the `%debug' and `%token-table' directives and the -`-t'/`--debug' and `-k'/`--token-table' options have no effect. This -may change in the future to eliminate unused code in the generated -parser, so use `%debug' and `%verbose-error' explicitly if needed. -Also, in the future the `%token-table' directive might enable a public -interface to access the token names and codes. - - -File: bison.info, Node: Java Semantic Values, Next: Java Location Values, Prev: Java Bison Interface, Up: Java Parsers - -10.2.2 Java Semantic Values ---------------------------- - -There is no `%union' directive in Java parsers. Instead, the semantic -values' types (class names) should be specified in the `%type' or -`%token' directive: - - %type <Expression> expr assignment_expr term factor - %type <Integer> number - - By default, the semantic stack is declared to have `Object' members, -which means that the class types you specify can be of any class. To -improve the type safety of the parser, you can declare the common -superclass of all the semantic values using the `%define stype' -directive. For example, after the following declaration: - - %define stype "ASTNode" - -any `%type' or `%token' specifying a semantic type which is not a -subclass of ASTNode, will cause a compile-time error. - - Types used in the directives may be qualified with a package name. -Primitive data types are accepted for Java version 1.5 or later. Note -that in this case the autoboxing feature of Java 1.5 will be used. -Generic types may not be used; this is due to a limitation in the -implementation of Bison, and may change in future releases. - - Java parsers do not support `%destructor', since the language adopts -garbage collection. The parser will try to hold references to semantic -values for as little time as needed. - - Java parsers do not support `%printer', as `toString()' can be used -to print the semantic values. This however may change (in a -backwards-compatible way) in future versions of Bison. - - -File: bison.info, Node: Java Location Values, Next: Java Parser Interface, Prev: Java Semantic Values, Up: Java Parsers - -10.2.3 Java Location Values ---------------------------- - -When the directive `%locations' is used, the Java parser supports -location tracking, see *Note Locations Overview: Locations. An -auxiliary user-defined class defines a "position", a single point in a -file; Bison itself defines a class representing a "location", a range -composed of a pair of positions (possibly spanning several files). The -location class is an inner class of the parser; the name is `Location' -by default, and may also be renamed using `%define location_type -"CLASS-NAME'. - - The location class treats the position as a completely opaque value. -By default, the class name is `Position', but this can be changed with -`%define position_type "CLASS-NAME"'. This class must be supplied by -the user. - - -- Instance Variable of Location: Position begin - -- Instance Variable of Location: Position end - The first, inclusive, position of the range, and the first beyond. - - -- Constructor on Location: Location (Position LOC) - Create a `Location' denoting an empty range located at a given - point. - - -- Constructor on Location: Location (Position BEGIN, Position END) - Create a `Location' from the endpoints of the range. - - -- Method on Location: String toString () - Prints the range represented by the location. For this to work - properly, the position class should override the `equals' and - `toString' methods appropriately. - - -File: bison.info, Node: Java Parser Interface, Next: Java Scanner Interface, Prev: Java Location Values, Up: Java Parsers - -10.2.4 Java Parser Interface ----------------------------- - -The name of the generated parser class defaults to `YYParser'. The -`YY' prefix may be changed using the `%name-prefix' directive or the -`-p'/`--name-prefix' option. Alternatively, use `%define -parser_class_name "NAME"' to give a custom name to the class. The -interface of this class is detailed below. - - By default, the parser class has package visibility. A declaration -`%define public' will change to public visibility. Remember that, -according to the Java language specification, the name of the `.java' -file should match the name of the class in this case. Similarly, you -can use `abstract', `final' and `strictfp' with the `%define' -declaration to add other modifiers to the parser class. - - The Java package name of the parser class can be specified using the -`%define package' directive. The superclass and the implemented -interfaces of the parser class can be specified with the `%define -extends' and `%define implements' directives. - - The parser class defines an inner class, `Location', that is used -for location tracking (see *Note Java Location Values::), and a inner -interface, `Lexer' (see *Note Java Scanner Interface::). Other than -these inner class/interface, and the members described in the interface -below, all the other members and fields are preceded with a `yy' or -`YY' prefix to avoid clashes with user code. - - The parser class can be extended using the `%parse-param' directive. -Each occurrence of the directive will add a `protected final' field to -the parser class, and an argument to its constructor, which initialize -them automatically. - - Token names defined by `%token' and the predefined `EOF' token name -are added as constant fields to the parser class. - - -- Constructor on YYParser: YYParser (LEX_PARAM, ..., PARSE_PARAM, - ...) - Build a new parser object with embedded `%code lexer'. There are - no parameters, unless `%parse-param's and/or `%lex-param's are - used. - - -- Constructor on YYParser: YYParser (Lexer LEXER, PARSE_PARAM, ...) - Build a new parser object using the specified scanner. There are - no additional parameters unless `%parse-param's are used. - - If the scanner is defined by `%code lexer', this constructor is - declared `protected' and is called automatically with a scanner - created with the correct `%lex-param's. - - -- Method on YYParser: boolean parse () - Run the syntactic analysis, and return `true' on success, `false' - otherwise. - - -- Method on YYParser: boolean recovering () - During the syntactic analysis, return `true' if recovering from a - syntax error. *Note Error Recovery::. - - -- Method on YYParser: java.io.PrintStream getDebugStream () - -- Method on YYParser: void setDebugStream (java.io.printStream O) - Get or set the stream used for tracing the parsing. It defaults to - `System.err'. - - -- Method on YYParser: int getDebugLevel () - -- Method on YYParser: void setDebugLevel (int L) - Get or set the tracing level. Currently its value is either 0, no - trace, or nonzero, full tracing. - - -File: bison.info, Node: Java Scanner Interface, Next: Java Action Features, Prev: Java Parser Interface, Up: Java Parsers - -10.2.5 Java Scanner Interface ------------------------------ - -There are two possible ways to interface a Bison-generated Java parser -with a scanner: the scanner may be defined by `%code lexer', or defined -elsewhere. In either case, the scanner has to implement the `Lexer' -inner interface of the parser class. - - In the first case, the body of the scanner class is placed in `%code -lexer' blocks. If you want to pass parameters from the parser -constructor to the scanner constructor, specify them with `%lex-param'; -they are passed before `%parse-param's to the constructor. - - In the second case, the scanner has to implement the `Lexer' -interface, which is defined within the parser class (e.g., -`YYParser.Lexer'). The constructor of the parser object will then -accept an object implementing the interface; `%lex-param' is not used -in this case. - - In both cases, the scanner has to implement the following methods. - - -- Method on Lexer: void yyerror (Location LOC, String MSG) - This method is defined by the user to emit an error message. The - first parameter is omitted if location tracking is not active. - Its type can be changed using `%define location_type "CLASS-NAME".' - - -- Method on Lexer: int yylex () - Return the next token. Its type is the return value, its semantic - value and location are saved and returned by the ther methods in - the interface. - - Use `%define lex_throws' to specify any uncaught exceptions. - Default is `java.io.IOException'. - - -- Method on Lexer: Position getStartPos () - -- Method on Lexer: Position getEndPos () - Return respectively the first position of the last token that - `yylex' returned, and the first position beyond it. These methods - are not needed unless location tracking is active. - - The return type can be changed using `%define position_type - "CLASS-NAME".' - - -- Method on Lexer: Object getLVal () - Return the semantical value of the last token that yylex returned. - - The return type can be changed using `%define stype "CLASS-NAME".' - - -File: bison.info, Node: Java Action Features, Next: Java Differences, Prev: Java Scanner Interface, Up: Java Parsers - -10.2.6 Special Features for Use in Java Actions ------------------------------------------------ - -The following special constructs can be uses in Java actions. Other -analogous C action features are currently unavailable for Java. - - Use `%define throws' to specify any uncaught exceptions from parser -actions, and initial actions specified by `%initial-action'. - - -- Variable: $N - The semantic value for the Nth component of the current rule. - This may not be assigned to. *Note Java Semantic Values::. - - -- Variable: $<TYPEALT>N - Like `$N' but specifies a alternative type TYPEALT. *Note Java - Semantic Values::. - - -- Variable: $$ - The semantic value for the grouping made by the current rule. As a - value, this is in the base type (`Object' or as specified by - `%define stype') as in not cast to the declared subtype because - casts are not allowed on the left-hand side of Java assignments. - Use an explicit Java cast if the correct subtype is needed. *Note - Java Semantic Values::. - - -- Variable: $<TYPEALT>$ - Same as `$$' since Java always allow assigning to the base type. - Perhaps we should use this and `$<>$' for the value and `$$' for - setting the value but there is currently no easy way to distinguish - these constructs. *Note Java Semantic Values::. - - -- Variable: @N - The location information of the Nth component of the current rule. - This may not be assigned to. *Note Java Location Values::. - - -- Variable: @$ - The location information of the grouping made by the current rule. - *Note Java Location Values::. - - -- Statement: return YYABORT; - Return immediately from the parser, indicating failure. *Note - Java Parser Interface::. - - -- Statement: return YYACCEPT; - Return immediately from the parser, indicating success. *Note - Java Parser Interface::. - - -- Statement: return YYERROR; - Start error recovery without printing an error message. *Note - Error Recovery::. - - -- Statement: return YYFAIL; - Print an error message and start error recovery. *Note Error - Recovery::. - - -- Function: boolean recovering () - Return whether error recovery is being done. In this state, the - parser reads token until it reaches a known state, and then - restarts normal operation. *Note Error Recovery::. - - -- Function: protected void yyerror (String msg) - -- Function: protected void yyerror (Position pos, String msg) - -- Function: protected void yyerror (Location loc, String msg) - Print an error message using the `yyerror' method of the scanner - instance in use. - - -File: bison.info, Node: Java Differences, Next: Java Declarations Summary, Prev: Java Action Features, Up: Java Parsers - -10.2.7 Differences between C/C++ and Java Grammars --------------------------------------------------- - -The different structure of the Java language forces several differences -between C/C++ grammars, and grammars designed for Java parsers. This -section summarizes these differences. - - * Java lacks a preprocessor, so the `YYERROR', `YYACCEPT', `YYABORT' - symbols (*note Table of Symbols::) cannot obviously be macros. - Instead, they should be preceded by `return' when they appear in - an action. The actual definition of these symbols is opaque to - the Bison grammar, and it might change in the future. The only - meaningful operation that you can do, is to return them. See - *note Java Action Features::. - - Note that of these three symbols, only `YYACCEPT' and `YYABORT' - will cause a return from the `yyparse' method(1). - - * Java lacks unions, so `%union' has no effect. Instead, semantic - values have a common base type: `Object' or as specified by - `%define stype'. Angle backets on `%token', `type', `$N' and `$$' - specify subtypes rather than fields of an union. The type of - `$$', even with angle brackets, is the base type since Java casts - are not allow on the left-hand side of assignments. Also, `$N' - and `@N' are not allowed on the left-hand side of assignments. See - *note Java Semantic Values:: and *note Java Action Features::. - - * The prolog declarations have a different meaning than in C/C++ - code. - `%code imports' - blocks are placed at the beginning of the Java source code. - They may include copyright notices. For a `package' - declarations, it is suggested to use `%define package' - instead. - - unqualified `%code' - blocks are placed inside the parser class. - - `%code lexer' - blocks, if specified, should include the implementation of the - scanner. If there is no such block, the scanner can be any - class that implements the appropriate interface (see *note - Java Scanner Interface::). - - Other `%code' blocks are not supported in Java parsers. In - particular, `%{ ... %}' blocks should not be used and may give an - error in future versions of Bison. - - The epilogue has the same meaning as in C/C++ code and it can be - used to define other classes used by the parser _outside_ the - parser class. - - ---------- Footnotes ---------- - - (1) Java parsers include the actions in a separate method than -`yyparse' in order to have an intuitive syntax that corresponds to -these C macros. - - -File: bison.info, Node: Java Declarations Summary, Prev: Java Differences, Up: Java Parsers - -10.2.8 Java Declarations Summary --------------------------------- - -This summary only include declarations specific to Java or have special -meaning when used in a Java parser. - - -- Directive: %language "Java" - Generate a Java class for the parser. - - -- Directive: %lex-param {TYPE NAME} - A parameter for the lexer class defined by `%code lexer' _only_, - added as parameters to the lexer constructor and the parser - constructor that _creates_ a lexer. Default is none. *Note Java - Scanner Interface::. - - -- Directive: %name-prefix "PREFIX" - The prefix of the parser class name `PREFIXParser' if `%define - parser_class_name' is not used. Default is `YY'. *Note Java - Bison Interface::. - - -- Directive: %parse-param {TYPE NAME} - A parameter for the parser class added as parameters to - constructor(s) and as fields initialized by the constructor(s). - Default is none. *Note Java Parser Interface::. - - -- Directive: %token <TYPE> TOKEN ... - Declare tokens. Note that the angle brackets enclose a Java - _type_. *Note Java Semantic Values::. - - -- Directive: %type <TYPE> NONTERMINAL ... - Declare the type of nonterminals. Note that the angle brackets - enclose a Java _type_. *Note Java Semantic Values::. - - -- Directive: %code { CODE ... } - Code appended to the inside of the parser class. *Note Java - Differences::. - - -- Directive: %code imports { CODE ... } - Code inserted just after the `package' declaration. *Note Java - Differences::. - - -- Directive: %code lexer { CODE ... } - Code added to the body of a inner lexer class within the parser - class. *Note Java Scanner Interface::. - - -- Directive: %% CODE ... - Code (after the second `%%') appended to the end of the file, - _outside_ the parser class. *Note Java Differences::. - - -- Directive: %{ CODE ... %} - Not supported. Use `%code import' instead. *Note Java - Differences::. - - -- Directive: %define abstract - Whether the parser class is declared `abstract'. Default is false. - *Note Java Bison Interface::. - - -- Directive: %define extends "SUPERCLASS" - The superclass of the parser class. Default is none. *Note Java - Bison Interface::. - - -- Directive: %define final - Whether the parser class is declared `final'. Default is false. - *Note Java Bison Interface::. - - -- Directive: %define implements "INTERFACES" - The implemented interfaces of the parser class, a comma-separated - list. Default is none. *Note Java Bison Interface::. - - -- Directive: %define lex_throws "EXCEPTIONS" - The exceptions thrown by the `yylex' method of the lexer, a - comma-separated list. Default is `java.io.IOException'. *Note - Java Scanner Interface::. - - -- Directive: %define location_type "CLASS" - The name of the class used for locations (a range between two - positions). This class is generated as an inner class of the - parser class by `bison'. Default is `Location'. *Note Java - Location Values::. - - -- Directive: %define package "PACKAGE" - The package to put the parser class in. Default is none. *Note - Java Bison Interface::. - - -- Directive: %define parser_class_name "NAME" - The name of the parser class. Default is `YYParser' or - `NAME-PREFIXParser'. *Note Java Bison Interface::. - - -- Directive: %define position_type "CLASS" - The name of the class used for positions. This class must be - supplied by the user. Default is `Position'. *Note Java Location - Values::. - - -- Directive: %define public - Whether the parser class is declared `public'. Default is false. - *Note Java Bison Interface::. - - -- Directive: %define stype "CLASS" - The base type of semantic values. Default is `Object'. *Note - Java Semantic Values::. - - -- Directive: %define strictfp - Whether the parser class is declared `strictfp'. Default is false. - *Note Java Bison Interface::. - - -- Directive: %define throws "EXCEPTIONS" - The exceptions thrown by user-supplied parser actions and - `%initial-action', a comma-separated list. Default is none. - *Note Java Parser Interface::. - - -File: bison.info, Node: FAQ, Next: Table of Symbols, Prev: Other Languages, Up: Top - -11 Frequently Asked Questions -***************************** - -Several questions about Bison come up occasionally. Here some of them -are addressed. - -* Menu: - -* Memory Exhausted:: Breaking the Stack Limits -* How Can I Reset the Parser:: `yyparse' Keeps some State -* Strings are Destroyed:: `yylval' Loses Track of Strings -* Implementing Gotos/Loops:: Control Flow in the Calculator -* Multiple start-symbols:: Factoring closely related grammars -* Secure? Conform?:: Is Bison POSIX safe? -* I can't build Bison:: Troubleshooting -* Where can I find help?:: Troubleshouting -* Bug Reports:: Troublereporting -* More Languages:: Parsers in C++, Java, and so on -* Beta Testing:: Experimenting development versions -* Mailing Lists:: Meeting other Bison users - - -File: bison.info, Node: Memory Exhausted, Next: How Can I Reset the Parser, Up: FAQ - -11.1 Memory Exhausted -===================== - - My parser returns with error with a `memory exhausted' - message. What can I do? - - This question is already addressed elsewhere, *Note Recursive Rules: -Recursion. - - -File: bison.info, Node: How Can I Reset the Parser, Next: Strings are Destroyed, Prev: Memory Exhausted, Up: FAQ - -11.2 How Can I Reset the Parser -=============================== - -The following phenomenon has several symptoms, resulting in the -following typical questions: - - I invoke `yyparse' several times, and on correct input it works - properly; but when a parse error is found, all the other calls fail - too. How can I reset the error flag of `yyparse'? - -or - - My parser includes support for an `#include'-like feature, in - which case I run `yyparse' from `yyparse'. This fails - although I did specify `%define api.pure'. - - These problems typically come not from Bison itself, but from -Lex-generated scanners. Because these scanners use large buffers for -speed, they might not notice a change of input file. As a -demonstration, consider the following source file, `first-line.l': - - -%{ -#include <stdio.h> -#include <stdlib.h> -%} -%% -.*\n ECHO; return 1; -%% -int -yyparse (char const *file) -{ - yyin = fopen (file, "r"); - if (!yyin) - exit (2); - /* One token only. */ - yylex (); - if (fclose (yyin) != 0) - exit (3); - return 0; -} - -int -main (void) -{ - yyparse ("input"); - yyparse ("input"); - return 0; -} - -If the file `input' contains - - -input:1: Hello, -input:2: World! - -then instead of getting the first line twice, you get: - - $ flex -ofirst-line.c first-line.l - $ gcc -ofirst-line first-line.c -ll - $ ./first-line - input:1: Hello, - input:2: World! - - Therefore, whenever you change `yyin', you must tell the -Lex-generated scanner to discard its current buffer and switch to the -new one. This depends upon your implementation of Lex; see its -documentation for more. For Flex, it suffices to call -`YY_FLUSH_BUFFER' after each change to `yyin'. If your Flex-generated -scanner needs to read from several input streams to handle features -like include files, you might consider using Flex functions like -`yy_switch_to_buffer' that manipulate multiple input buffers. - - If your Flex-generated scanner uses start conditions (*note Start -conditions: (flex)Start conditions.), you might also want to reset the -scanner's state, i.e., go back to the initial start condition, through -a call to `BEGIN (0)'. - - -File: bison.info, Node: Strings are Destroyed, Next: Implementing Gotos/Loops, Prev: How Can I Reset the Parser, Up: FAQ - -11.3 Strings are Destroyed -========================== - - My parser seems to destroy old strings, or maybe it loses track of - them. Instead of reporting `"foo", "bar"', it reports - `"bar", "bar"', or even `"foo\nbar", "bar"'. - - This error is probably the single most frequent "bug report" sent to -Bison lists, but is only concerned with a misunderstanding of the role -of the scanner. Consider the following Lex code: - - -%{ -#include <stdio.h> -char *yylval = NULL; -%} -%% -.* yylval = yytext; return 1; -\n /* IGNORE */ -%% -int -main () -{ - /* Similar to using $1, $2 in a Bison action. */ - char *fst = (yylex (), yylval); - char *snd = (yylex (), yylval); - printf ("\"%s\", \"%s\"\n", fst, snd); - return 0; -} - - If you compile and run this code, you get: - - $ flex -osplit-lines.c split-lines.l - $ gcc -osplit-lines split-lines.c -ll - $ printf 'one\ntwo\n' | ./split-lines - "one - two", "two" - -this is because `yytext' is a buffer provided for _reading_ in the -action, but if you want to keep it, you have to duplicate it (e.g., -using `strdup'). Note that the output may depend on how your -implementation of Lex handles `yytext'. For instance, when given the -Lex compatibility option `-l' (which triggers the option `%array') Flex -generates a different behavior: - - $ flex -l -osplit-lines.c split-lines.l - $ gcc -osplit-lines split-lines.c -ll - $ printf 'one\ntwo\n' | ./split-lines - "two", "two" - - -File: bison.info, Node: Implementing Gotos/Loops, Next: Multiple start-symbols, Prev: Strings are Destroyed, Up: FAQ - -11.4 Implementing Gotos/Loops -============================= - - My simple calculator supports variables, assignments, and functions, - but how can I implement gotos, or loops? - - Although very pedagogical, the examples included in the document blur -the distinction to make between the parser--whose job is to recover the -structure of a text and to transmit it to subsequent modules of the -program--and the processing (such as the execution) of this structure. -This works well with so called straight line programs, i.e., precisely -those that have a straightforward execution model: execute simple -instructions one after the others. - - If you want a richer model, you will probably need to use the parser -to construct a tree that does represent the structure it has recovered; -this tree is usually called the "abstract syntax tree", or "AST" for -short. Then, walking through this tree, traversing it in various ways, -will enable treatments such as its execution or its translation, which -will result in an interpreter or a compiler. - - This topic is way beyond the scope of this manual, and the reader is -invited to consult the dedicated literature. - - -File: bison.info, Node: Multiple start-symbols, Next: Secure? Conform?, Prev: Implementing Gotos/Loops, Up: FAQ - -11.5 Multiple start-symbols -=========================== - - I have several closely related grammars, and I would like to share their - implementations. In fact, I could use a single grammar but with - multiple entry points. - - Bison does not support multiple start-symbols, but there is a very -simple means to simulate them. If `foo' and `bar' are the two pseudo -start-symbols, then introduce two new tokens, say `START_FOO' and -`START_BAR', and use them as switches from the real start-symbol: - - %token START_FOO START_BAR; - %start start; - start: START_FOO foo - | START_BAR bar; - - These tokens prevents the introduction of new conflicts. As far as -the parser goes, that is all that is needed. - - Now the difficult part is ensuring that the scanner will send these -tokens first. If your scanner is hand-written, that should be -straightforward. If your scanner is generated by Lex, them there is -simple means to do it: recall that anything between `%{ ... %}' after -the first `%%' is copied verbatim in the top of the generated `yylex' -function. Make sure a variable `start_token' is available in the -scanner (e.g., a global variable or using `%lex-param' etc.), and use -the following: - - /* Prologue. */ - %% - %{ - if (start_token) - { - int t = start_token; - start_token = 0; - return t; - } - %} - /* The rules. */ - - -File: bison.info, Node: Secure? Conform?, Next: I can't build Bison, Prev: Multiple start-symbols, Up: FAQ - -11.6 Secure? Conform? -====================== - - Is Bison secure? Does it conform to POSIX? - - If you're looking for a guarantee or certification, we don't provide -it. However, Bison is intended to be a reliable program that conforms -to the POSIX specification for Yacc. If you run into problems, please -send us a bug report. - - -File: bison.info, Node: I can't build Bison, Next: Where can I find help?, Prev: Secure? Conform?, Up: FAQ - -11.7 I can't build Bison -======================== - - I can't build Bison because `make' complains that - `msgfmt' is not found. - What should I do? - - Like most GNU packages with internationalization support, that -feature is turned on by default. If you have problems building in the -`po' subdirectory, it indicates that your system's internationalization -support is lacking. You can re-configure Bison with `--disable-nls' to -turn off this support, or you can install GNU gettext from -`ftp://ftp.gnu.org/gnu/gettext/' and re-configure Bison. See the file -`ABOUT-NLS' for more information. - - -File: bison.info, Node: Where can I find help?, Next: Bug Reports, Prev: I can't build Bison, Up: FAQ - -11.8 Where can I find help? -=========================== - - I'm having trouble using Bison. Where can I find help? - - First, read this fine manual. Beyond that, you can send mail to -<help-bison@gnu.org>. This mailing list is intended to be populated -with people who are willing to answer questions about using and -installing Bison. Please keep in mind that (most of) the people on the -list have aspects of their lives which are not related to Bison (!), so -you may not receive an answer to your question right away. This can be -frustrating, but please try not to honk them off; remember that any -help they provide is purely voluntary and out of the kindness of their -hearts. - - -File: bison.info, Node: Bug Reports, Next: More Languages, Prev: Where can I find help?, Up: FAQ - -11.9 Bug Reports -================ - - I found a bug. What should I include in the bug report? - - Before you send a bug report, make sure you are using the latest -version. Check `ftp://ftp.gnu.org/pub/gnu/bison/' or one of its -mirrors. Be sure to include the version number in your bug report. If -the bug is present in the latest version but not in a previous version, -try to determine the most recent version which did not contain the bug. - - If the bug is parser-related, you should include the smallest grammar -you can which demonstrates the bug. The grammar file should also be -complete (i.e., I should be able to run it through Bison without having -to edit or add anything). The smaller and simpler the grammar, the -easier it will be to fix the bug. - - Include information about your compilation environment, including -your operating system's name and version and your compiler's name and -version. If you have trouble compiling, you should also include a -transcript of the build session, starting with the invocation of -`configure'. Depending on the nature of the bug, you may be asked to -send additional files as well (such as `config.h' or `config.cache'). - - Patches are most welcome, but not required. That is, do not -hesitate to send a bug report just because you can not provide a fix. - - Send bug reports to <bug-bison@gnu.org>. - - -File: bison.info, Node: More Languages, Next: Beta Testing, Prev: Bug Reports, Up: FAQ - -11.10 More Languages -==================== - - Will Bison ever have C++ and Java support? How about INSERT YOUR - FAVORITE LANGUAGE HERE? - - C++ and Java support is there now, and is documented. We'd love to -add other languages; contributions are welcome. - - -File: bison.info, Node: Beta Testing, Next: Mailing Lists, Prev: More Languages, Up: FAQ - -11.11 Beta Testing -================== - - What is involved in being a beta tester? - - It's not terribly involved. Basically, you would download a test -release, compile it, and use it to build and run a parser or two. After -that, you would submit either a bug report or a message saying that -everything is okay. It is important to report successes as well as -failures because test releases eventually become mainstream releases, -but only if they are adequately tested. If no one tests, development is -essentially halted. - - Beta testers are particularly needed for operating systems to which -the developers do not have easy access. They currently have easy -access to recent GNU/Linux and Solaris versions. Reports about other -operating systems are especially welcome. - - -File: bison.info, Node: Mailing Lists, Prev: Beta Testing, Up: FAQ - -11.12 Mailing Lists -=================== - - How do I join the help-bison and bug-bison mailing lists? - - See `http://lists.gnu.org/'. - - -File: bison.info, Node: Table of Symbols, Next: Glossary, Prev: FAQ, Up: Top - -Appendix A Bison Symbols -************************ - - -- Variable: @$ - In an action, the location of the left-hand side of the rule. - *Note Locations Overview: Locations. - - -- Variable: @N - In an action, the location of the N-th symbol of the right-hand - side of the rule. *Note Locations Overview: Locations. - - -- Variable: $$ - In an action, the semantic value of the left-hand side of the rule. - *Note Actions::. - - -- Variable: $N - In an action, the semantic value of the N-th symbol of the - right-hand side of the rule. *Note Actions::. - - -- Delimiter: %% - Delimiter used to separate the grammar rule section from the Bison - declarations section or the epilogue. *Note The Overall Layout of - a Bison Grammar: Grammar Layout. - - -- Delimiter: %{CODE%} - All code listed between `%{' and `%}' is copied directly to the - output file uninterpreted. Such code forms the prologue of the - input file. *Note Outline of a Bison Grammar: Grammar Outline. - - -- Construct: /*...*/ - Comment delimiters, as in C. - - -- Delimiter: : - Separates a rule's result from its components. *Note Syntax of - Grammar Rules: Rules. - - -- Delimiter: ; - Terminates a rule. *Note Syntax of Grammar Rules: Rules. - - -- Delimiter: | - Separates alternate rules for the same result nonterminal. *Note - Syntax of Grammar Rules: Rules. - - -- Directive: <*> - Used to define a default tagged `%destructor' or default tagged - `%printer'. - - This feature is experimental. More user feedback will help to - determine whether it should become a permanent feature. - - *Note Freeing Discarded Symbols: Destructor Decl. - - -- Directive: <> - Used to define a default tagless `%destructor' or default tagless - `%printer'. - - This feature is experimental. More user feedback will help to - determine whether it should become a permanent feature. - - *Note Freeing Discarded Symbols: Destructor Decl. - - -- Symbol: $accept - The predefined nonterminal whose only rule is `$accept: START - $end', where START is the start symbol. *Note The Start-Symbol: - Start Decl. It cannot be used in the grammar. - - -- Directive: %code {CODE} - -- Directive: %code QUALIFIER {CODE} - Insert CODE verbatim into output parser source. *Note %code: Decl - Summary. - - -- Directive: %debug - Equip the parser for debugging. *Note Decl Summary::. - - -- Directive: %debug - Equip the parser for debugging. *Note Decl Summary::. - - -- Directive: %define DEFINE-VARIABLE - -- Directive: %define DEFINE-VARIABLE VALUE - Define a variable to adjust Bison's behavior. *Note %define: Decl - Summary. - - -- Directive: %defines - Bison declaration to create a header file meant for the scanner. - *Note Decl Summary::. - - -- Directive: %defines DEFINES-FILE - Same as above, but save in the file DEFINES-FILE. *Note Decl - Summary::. - - -- Directive: %destructor - Specify how the parser should reclaim the memory associated to - discarded symbols. *Note Freeing Discarded Symbols: Destructor - Decl. - - -- Directive: %dprec - Bison declaration to assign a precedence to a rule that is used at - parse time to resolve reduce/reduce conflicts. *Note Writing GLR - Parsers: GLR Parsers. - - -- Symbol: $end - The predefined token marking the end of the token stream. It - cannot be used in the grammar. - - -- Symbol: error - A token name reserved for error recovery. This token may be used - in grammar rules so as to allow the Bison parser to recognize an - error in the grammar without halting the process. In effect, a - sentence containing an error may be recognized as valid. On a - syntax error, the token `error' becomes the current lookahead - token. Actions corresponding to `error' are then executed, and - the lookahead token is reset to the token that originally caused - the violation. *Note Error Recovery::. - - -- Directive: %error-verbose - Bison declaration to request verbose, specific error message - strings when `yyerror' is called. - - -- Directive: %file-prefix "PREFIX" - Bison declaration to set the prefix of the output files. *Note - Decl Summary::. - - -- Directive: %glr-parser - Bison declaration to produce a GLR parser. *Note Writing GLR - Parsers: GLR Parsers. - - -- Directive: %initial-action - Run user code before parsing. *Note Performing Actions before - Parsing: Initial Action Decl. - - -- Directive: %language - Specify the programming language for the generated parser. *Note - Decl Summary::. - - -- Directive: %left - Bison declaration to assign left associativity to token(s). *Note - Operator Precedence: Precedence Decl. - - -- Directive: %lex-param {ARGUMENT-DECLARATION} - Bison declaration to specifying an additional parameter that - `yylex' should accept. *Note Calling Conventions for Pure - Parsers: Pure Calling. - - -- Directive: %merge - Bison declaration to assign a merging function to a rule. If - there is a reduce/reduce conflict with a rule having the same - merging function, the function is applied to the two semantic - values to get a single result. *Note Writing GLR Parsers: GLR - Parsers. - - -- Directive: %name-prefix "PREFIX" - Bison declaration to rename the external symbols. *Note Decl - Summary::. - - -- Directive: %no-lines - Bison declaration to avoid generating `#line' directives in the - parser file. *Note Decl Summary::. - - -- Directive: %nonassoc - Bison declaration to assign nonassociativity to token(s). *Note - Operator Precedence: Precedence Decl. - - -- Directive: %output "FILE" - Bison declaration to set the name of the parser file. *Note Decl - Summary::. - - -- Directive: %parse-param {ARGUMENT-DECLARATION} - Bison declaration to specifying an additional parameter that - `yyparse' should accept. *Note The Parser Function `yyparse': - Parser Function. - - -- Directive: %prec - Bison declaration to assign a precedence to a specific rule. - *Note Context-Dependent Precedence: Contextual Precedence. - - -- Directive: %pure-parser - Deprecated version of `%define api.pure' (*note %define: Decl - Summary.), for which Bison is more careful to warn about - unreasonable usage. - - -- Directive: %require "VERSION" - Require version VERSION or higher of Bison. *Note Require a - Version of Bison: Require Decl. - - -- Directive: %right - Bison declaration to assign right associativity to token(s). - *Note Operator Precedence: Precedence Decl. - - -- Directive: %skeleton - Specify the skeleton to use; usually for development. *Note Decl - Summary::. - - -- Directive: %start - Bison declaration to specify the start symbol. *Note The - Start-Symbol: Start Decl. - - -- Directive: %token - Bison declaration to declare token(s) without specifying - precedence. *Note Token Type Names: Token Decl. - - -- Directive: %token-table - Bison declaration to include a token name table in the parser file. - *Note Decl Summary::. - - -- Directive: %type - Bison declaration to declare nonterminals. *Note Nonterminal - Symbols: Type Decl. - - -- Symbol: $undefined - The predefined token onto which all undefined values returned by - `yylex' are mapped. It cannot be used in the grammar, rather, use - `error'. - - -- Directive: %union - Bison declaration to specify several possible data types for - semantic values. *Note The Collection of Value Types: Union Decl. - - -- Macro: YYABORT - Macro to pretend that an unrecoverable syntax error has occurred, - by making `yyparse' return 1 immediately. The error reporting - function `yyerror' is not called. *Note The Parser Function - `yyparse': Parser Function. - - For Java parsers, this functionality is invoked using `return - YYABORT;' instead. - - -- Macro: YYACCEPT - Macro to pretend that a complete utterance of the language has been - read, by making `yyparse' return 0 immediately. *Note The Parser - Function `yyparse': Parser Function. - - For Java parsers, this functionality is invoked using `return - YYACCEPT;' instead. - - -- Macro: YYBACKUP - Macro to discard a value from the parser stack and fake a lookahead - token. *Note Special Features for Use in Actions: Action Features. - - -- Variable: yychar - External integer variable that contains the integer value of the - lookahead token. (In a pure parser, it is a local variable within - `yyparse'.) Error-recovery rule actions may examine this variable. - *Note Special Features for Use in Actions: Action Features. - - -- Variable: yyclearin - Macro used in error-recovery rule actions. It clears the previous - lookahead token. *Note Error Recovery::. - - -- Macro: YYDEBUG - Macro to define to equip the parser with tracing code. *Note - Tracing Your Parser: Tracing. - - -- Variable: yydebug - External integer variable set to zero by default. If `yydebug' is - given a nonzero value, the parser will output information on input - symbols and parser action. *Note Tracing Your Parser: Tracing. - - -- Macro: yyerrok - Macro to cause parser to recover immediately to its normal mode - after a syntax error. *Note Error Recovery::. - - -- Macro: YYERROR - Macro to pretend that a syntax error has just been detected: call - `yyerror' and then perform normal error recovery if possible - (*note Error Recovery::), or (if recovery is impossible) make - `yyparse' return 1. *Note Error Recovery::. - - For Java parsers, this functionality is invoked using `return - YYERROR;' instead. - - -- Function: yyerror - User-supplied function to be called by `yyparse' on error. *Note - The Error Reporting Function `yyerror': Error Reporting. - - -- Macro: YYERROR_VERBOSE - An obsolete macro that you define with `#define' in the prologue - to request verbose, specific error message strings when `yyerror' - is called. It doesn't matter what definition you use for - `YYERROR_VERBOSE', just whether you define it. Using - `%error-verbose' is preferred. - - -- Macro: YYINITDEPTH - Macro for specifying the initial size of the parser stack. *Note - Memory Management::. - - -- Function: yylex - User-supplied lexical analyzer function, called with no arguments - to get the next token. *Note The Lexical Analyzer Function - `yylex': Lexical. - - -- Macro: YYLEX_PARAM - An obsolete macro for specifying an extra argument (or list of - extra arguments) for `yyparse' to pass to `yylex'. The use of this - macro is deprecated, and is supported only for Yacc like parsers. - *Note Calling Conventions for Pure Parsers: Pure Calling. - - -- Variable: yylloc - External variable in which `yylex' should place the line and column - numbers associated with a token. (In a pure parser, it is a local - variable within `yyparse', and its address is passed to `yylex'.) - You can ignore this variable if you don't use the `@' feature in - the grammar actions. *Note Textual Locations of Tokens: Token - Locations. In semantic actions, it stores the location of the - lookahead token. *Note Actions and Locations: Actions and - Locations. - - -- Type: YYLTYPE - Data type of `yylloc'; by default, a structure with four members. - *Note Data Types of Locations: Location Type. - - -- Variable: yylval - External variable in which `yylex' should place the semantic value - associated with a token. (In a pure parser, it is a local - variable within `yyparse', and its address is passed to `yylex'.) - *Note Semantic Values of Tokens: Token Values. In semantic - actions, it stores the semantic value of the lookahead token. - *Note Actions: Actions. - - -- Macro: YYMAXDEPTH - Macro for specifying the maximum size of the parser stack. *Note - Memory Management::. - - -- Variable: yynerrs - Global variable which Bison increments each time it reports a - syntax error. (In a pure parser, it is a local variable within - `yyparse'. In a pure push parser, it is a member of yypstate.) - *Note The Error Reporting Function `yyerror': Error Reporting. - - -- Function: yyparse - The parser function produced by Bison; call this function to start - parsing. *Note The Parser Function `yyparse': Parser Function. - - -- Function: yypstate_delete - The function to delete a parser instance, produced by Bison in - push mode; call this function to delete the memory associated with - a parser. *Note The Parser Delete Function `yypstate_delete': - Parser Delete Function. (The current push parsing interface is - experimental and may evolve. More user feedback will help to - stabilize it.) - - -- Function: yypstate_new - The function to create a parser instance, produced by Bison in - push mode; call this function to create a new parser. *Note The - Parser Create Function `yypstate_new': Parser Create Function. - (The current push parsing interface is experimental and may evolve. - More user feedback will help to stabilize it.) - - -- Function: yypull_parse - The parser function produced by Bison in push mode; call this - function to parse the rest of the input stream. *Note The Pull - Parser Function `yypull_parse': Pull Parser Function. (The - current push parsing interface is experimental and may evolve. - More user feedback will help to stabilize it.) - - -- Function: yypush_parse - The parser function produced by Bison in push mode; call this - function to parse a single token. *Note The Push Parser Function - `yypush_parse': Push Parser Function. (The current push parsing - interface is experimental and may evolve. More user feedback will - help to stabilize it.) - - -- Macro: YYPARSE_PARAM - An obsolete macro for specifying the name of a parameter that - `yyparse' should accept. The use of this macro is deprecated, and - is supported only for Yacc like parsers. *Note Calling - Conventions for Pure Parsers: Pure Calling. - - -- Macro: YYRECOVERING - The expression `YYRECOVERING ()' yields 1 when the parser is - recovering from a syntax error, and 0 otherwise. *Note Special - Features for Use in Actions: Action Features. - - -- Macro: YYSTACK_USE_ALLOCA - Macro used to control the use of `alloca' when the C LALR(1) - parser needs to extend its stacks. If defined to 0, the parser - will use `malloc' to extend its stacks. If defined to 1, the - parser will use `alloca'. Values other than 0 and 1 are reserved - for future Bison extensions. If not defined, `YYSTACK_USE_ALLOCA' - defaults to 0. - - In the all-too-common case where your code may run on a host with a - limited stack and with unreliable stack-overflow checking, you - should set `YYMAXDEPTH' to a value that cannot possibly result in - unchecked stack overflow on any of your target hosts when `alloca' - is called. You can inspect the code that Bison generates in order - to determine the proper numeric values. This will require some - expertise in low-level implementation details. - - -- Type: YYSTYPE - Data type of semantic values; `int' by default. *Note Data Types - of Semantic Values: Value Type. - - -File: bison.info, Node: Glossary, Next: Copying This Manual, Prev: Table of Symbols, Up: Top - -Appendix B Glossary -******************* - -Backus-Naur Form (BNF; also called "Backus Normal Form") - Formal method of specifying context-free grammars originally - proposed by John Backus, and slightly improved by Peter Naur in - his 1960-01-02 committee document contributing to what became the - Algol 60 report. *Note Languages and Context-Free Grammars: - Language and Grammar. - -Context-free grammars - Grammars specified as rules that can be applied regardless of - context. Thus, if there is a rule which says that an integer can - be used as an expression, integers are allowed _anywhere_ an - expression is permitted. *Note Languages and Context-Free - Grammars: Language and Grammar. - -Dynamic allocation - Allocation of memory that occurs during execution, rather than at - compile time or on entry to a function. - -Empty string - Analogous to the empty set in set theory, the empty string is a - character string of length zero. - -Finite-state stack machine - A "machine" that has discrete states in which it is said to exist - at each instant in time. As input to the machine is processed, the - machine moves from state to state as specified by the logic of the - machine. In the case of the parser, the input is the language - being parsed, and the states correspond to various stages in the - grammar rules. *Note The Bison Parser Algorithm: Algorithm. - -Generalized LR (GLR) - A parsing algorithm that can handle all context-free grammars, - including those that are not LALR(1). It resolves situations that - Bison's usual LALR(1) algorithm cannot by effectively splitting - off multiple parsers, trying all possible parsers, and discarding - those that fail in the light of additional right context. *Note - Generalized LR Parsing: Generalized LR Parsing. - -Grouping - A language construct that is (in general) grammatically divisible; - for example, `expression' or `declaration' in C. *Note Languages - and Context-Free Grammars: Language and Grammar. - -Infix operator - An arithmetic operator that is placed between the operands on - which it performs some operation. - -Input stream - A continuous flow of data between devices or programs. - -Language construct - One of the typical usage schemas of the language. For example, - one of the constructs of the C language is the `if' statement. - *Note Languages and Context-Free Grammars: Language and Grammar. - -Left associativity - Operators having left associativity are analyzed from left to - right: `a+b+c' first computes `a+b' and then combines with `c'. - *Note Operator Precedence: Precedence. - -Left recursion - A rule whose result symbol is also its first component symbol; for - example, `expseq1 : expseq1 ',' exp;'. *Note Recursive Rules: - Recursion. - -Left-to-right parsing - Parsing a sentence of a language by analyzing it token by token - from left to right. *Note The Bison Parser Algorithm: Algorithm. - -Lexical analyzer (scanner) - A function that reads an input stream and returns tokens one by - one. *Note The Lexical Analyzer Function `yylex': Lexical. - -Lexical tie-in - A flag, set by actions in the grammar rules, which alters the way - tokens are parsed. *Note Lexical Tie-ins::. - -Literal string token - A token which consists of two or more fixed characters. *Note - Symbols::. - -Lookahead token - A token already read but not yet shifted. *Note Lookahead Tokens: - Lookahead. - -LALR(1) - The class of context-free grammars that Bison (like most other - parser generators) can handle; a subset of LR(1). *Note - Mysterious Reduce/Reduce Conflicts: Mystery Conflicts. - -LR(1) - The class of context-free grammars in which at most one token of - lookahead is needed to disambiguate the parsing of any piece of - input. - -Nonterminal symbol - A grammar symbol standing for a grammatical construct that can be - expressed through rules in terms of smaller constructs; in other - words, a construct that is not a token. *Note Symbols::. - -Parser - A function that recognizes valid sentences of a language by - analyzing the syntax structure of a set of tokens passed to it - from a lexical analyzer. - -Postfix operator - An arithmetic operator that is placed after the operands upon - which it performs some operation. - -Reduction - Replacing a string of nonterminals and/or terminals with a single - nonterminal, according to a grammar rule. *Note The Bison Parser - Algorithm: Algorithm. - -Reentrant - A reentrant subprogram is a subprogram which can be in invoked any - number of times in parallel, without interference between the - various invocations. *Note A Pure (Reentrant) Parser: Pure Decl. - -Reverse polish notation - A language in which all operators are postfix operators. - -Right recursion - A rule whose result symbol is also its last component symbol; for - example, `expseq1: exp ',' expseq1;'. *Note Recursive Rules: - Recursion. - -Semantics - In computer languages, the semantics are specified by the actions - taken for each instance of the language, i.e., the meaning of each - statement. *Note Defining Language Semantics: Semantics. - -Shift - A parser is said to shift when it makes the choice of analyzing - further input from the stream rather than reducing immediately some - already-recognized rule. *Note The Bison Parser Algorithm: - Algorithm. - -Single-character literal - A single character that is recognized and interpreted as is. - *Note From Formal Rules to Bison Input: Grammar in Bison. - -Start symbol - The nonterminal symbol that stands for a complete valid utterance - in the language being parsed. The start symbol is usually listed - as the first nonterminal symbol in a language specification. - *Note The Start-Symbol: Start Decl. - -Symbol table - A data structure where symbol names and associated data are stored - during parsing to allow for recognition and use of existing - information in repeated uses of a symbol. *Note Multi-function - Calc::. - -Syntax error - An error encountered during parsing of an input stream due to - invalid syntax. *Note Error Recovery::. - -Token - A basic, grammatically indivisible unit of a language. The symbol - that describes a token in the grammar is a terminal symbol. The - input of the Bison parser is a stream of tokens which comes from - the lexical analyzer. *Note Symbols::. - -Terminal symbol - A grammar symbol that has no rules in the grammar and therefore is - grammatically indivisible. The piece of text it represents is a - token. *Note Languages and Context-Free Grammars: Language and - Grammar. - - -File: bison.info, Node: Copying This Manual, Next: Index, Prev: Glossary, Up: Top - -Appendix C Copying This Manual -****************************** - - Version 1.2, November 2002 - - Copyright (C) 2000,2001,2002 Free Software Foundation, Inc. - 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA - - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. - - 0. PREAMBLE - - The purpose of this License is to make a manual, textbook, or other - functional and useful document "free" in the sense of freedom: to - assure everyone the effective freedom to copy and redistribute it, - with or without modifying it, either commercially or - noncommercially. 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COLLECTIONS OF DOCUMENTS - - You may make a collection consisting of the Document and other - documents released under this License, and replace the individual - copies of this License in the various documents with a single copy - that is included in the collection, provided that you follow the - rules of this License for verbatim copying of each of the - documents in all other respects. - - You may extract a single document from such a collection, and - distribute it individually under this License, provided you insert - a copy of this License into the extracted document, and follow - this License in all other respects regarding verbatim copying of - that document. - - 7. 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FUTURE REVISIONS OF THIS LICENSE - - The Free Software Foundation may publish new, revised versions of - the GNU Free Documentation License from time to time. Such new - versions will be similar in spirit to the present version, but may - differ in detail to address new problems or concerns. See - `http://www.gnu.org/copyleft/'. - - Each version of the License is given a distinguishing version - number. If the Document specifies that a particular numbered - version of this License "or any later version" applies to it, you - have the option of following the terms and conditions either of - that specified version or of any later version that has been - published (not as a draft) by the Free Software Foundation. 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A copy of the license is included in the section entitled ``GNU - Free Documentation License''. - - If you have Invariant Sections, Front-Cover Texts and Back-Cover -Texts, replace the "with...Texts." line with this: - - with the Invariant Sections being LIST THEIR TITLES, with - the Front-Cover Texts being LIST, and with the Back-Cover Texts - being LIST. - - If you have Invariant Sections without Cover Texts, or some other -combination of the three, merge those two alternatives to suit the -situation. - - If your document contains nontrivial examples of program code, we -recommend releasing these examples in parallel under your choice of -free software license, such as the GNU General Public License, to -permit their use in free software. - - -File: bison.info, Node: Index, Prev: Copying This Manual, Up: Top - -Index -***** - - -* Menu: - -* $ <1>: Table of Symbols. (line 19) -* $ <2>: Action Features. (line 14) -* $: Java Action Features. - (line 13) -* $$ <1>: Action Features. (line 10) -* $$ <2>: Java Action Features. - (line 21) -* $$ <3>: Actions. (line 6) -* $$: Table of Symbols. (line 15) -* $< <1>: Java Action Features. - (line 17) -* $< <2>: Action Features. (line 23) -* $< <3>: Java Action Features. - (line 29) -* $<: Action Features. (line 18) -* $accept: Table of Symbols. (line 65) -* $end: Table of Symbols. (line 104) -* $N: Actions. (line 6) -* $undefined: Table of Symbols. (line 212) -* % <1>: Java Declarations Summary. - (line 53) -* %: Table of Symbols. (line 28) -* %% <1>: Table of Symbols. (line 23) -* %%: Java Declarations Summary. - (line 49) -* %code <1>: Table of Symbols. (line 71) -* %code <2>: Prologue Alternatives. - (line 6) -* %code <3>: Java Declarations Summary. - (line 37) -* %code <4>: Calc++ Parser. (line 64) -* %code: Decl Summary. (line 63) -* %code imports <1>: Java Declarations Summary. - (line 41) -* %code imports: Decl Summary. (line 115) -* %code lexer: Java Declarations Summary. - (line 45) -* %code provides <1>: Prologue Alternatives. - (line 6) -* %code provides: Decl Summary. (line 303) -* %code requires <1>: Decl Summary. (line 72) -* %code requires <2>: Calc++ Parser. (line 17) -* %code requires: Prologue Alternatives. - (line 6) -* %code top <1>: Decl Summary. (line 98) -* %code top: Prologue Alternatives. - (line 6) -* %debug <1>: Table of Symbols. (line 78) -* %debug <2>: Tracing. (line 23) -* %debug <3>: Decl Summary. (line 134) -* %debug: Table of Symbols. (line 75) -* %define <1>: Table of Symbols. (line 81) -* %define <2>: Decl Summary. (line 140) -* %define: Table of Symbols. (line 82) -* %define abstract: Java Declarations Summary. - (line 57) -* %define api.pure <1>: Decl Summary. (line 166) -* %define api.pure: Pure Decl. (line 6) -* %define api.push_pull <1>: Push Decl. (line 6) -* %define api.push_pull: Decl Summary. (line 177) -* %define extends: Java Declarations Summary. - (line 61) -* %define final: Java Declarations Summary. - (line 65) -* %define implements: Java Declarations Summary. - (line 69) -* %define lex_throws: Java Declarations Summary. - (line 73) -* %define location_type: Java Declarations Summary. - (line 78) -* %define lr.keep_unreachable_states: Decl Summary. (line 190) -* %define namespace <1>: Decl Summary. (line 232) -* %define namespace: C++ Bison Interface. (line 10) -* %define package: Java Declarations Summary. - (line 84) -* %define parser_class_name: Java Declarations Summary. - (line 88) -* %define position_type: Java Declarations Summary. - (line 92) -* %define public: Java Declarations Summary. - (line 97) -* %define strictfp: Java Declarations Summary. - (line 105) -* %define stype: Java Declarations Summary. - (line 101) -* %define throws: Java Declarations Summary. - (line 109) -* %defines <1>: Table of Symbols. (line 90) -* %defines <2>: Decl Summary. (line 307) -* %defines: Table of Symbols. (line 86) -* %destructor <1>: Destructor Decl. (line 22) -* %destructor <2>: Decl Summary. (line 310) -* %destructor <3>: Destructor Decl. (line 6) -* %destructor <4>: Mid-Rule Actions. (line 59) -* %destructor <5>: Table of Symbols. (line 94) -* %destructor: Destructor Decl. (line 22) -* %dprec <1>: Table of Symbols. (line 99) -* %dprec: Merging GLR Parses. (line 6) -* %error-verbose <1>: Table of Symbols. (line 118) -* %error-verbose: Error Reporting. (line 17) -* %expect <1>: Decl Summary. (line 38) -* %expect: Expect Decl. (line 6) -* %expect-rr <1>: Expect Decl. (line 6) -* %expect-rr: Simple GLR Parsers. (line 6) -* %file-prefix <1>: Decl Summary. (line 315) -* %file-prefix: Table of Symbols. (line 122) -* %glr-parser <1>: Simple GLR Parsers. (line 6) -* %glr-parser <2>: Table of Symbols. (line 126) -* %glr-parser: GLR Parsers. (line 6) -* %initial-action <1>: Table of Symbols. (line 130) -* %initial-action: Initial Action Decl. (line 11) -* %language <1>: Decl Summary. (line 319) -* %language: Table of Symbols. (line 134) -* %language "Java": Java Declarations Summary. - (line 10) -* %left <1>: Using Precedence. (line 6) -* %left <2>: Decl Summary. (line 21) -* %left: Table of Symbols. (line 138) -* %lex-param <1>: Table of Symbols. (line 142) -* %lex-param <2>: Pure Calling. (line 31) -* %lex-param: Java Declarations Summary. - (line 13) -* %locations: Decl Summary. (line 327) -* %merge <1>: Merging GLR Parses. (line 6) -* %merge: Table of Symbols. (line 147) -* %name-prefix <1>: Java Declarations Summary. - (line 19) -* %name-prefix <2>: Decl Summary. (line 334) -* %name-prefix: Table of Symbols. (line 154) -* %no-lines <1>: Decl Summary. (line 346) -* %no-lines: Table of Symbols. (line 158) -* %nonassoc <1>: Table of Symbols. (line 162) -* %nonassoc <2>: Using Precedence. (line 6) -* %nonassoc: Decl Summary. (line 25) -* %output <1>: Decl Summary. (line 354) -* %output: Table of Symbols. (line 166) -* %parse-param <1>: Java Declarations Summary. - (line 24) -* %parse-param <2>: Parser Function. (line 36) -* %parse-param <3>: Table of Symbols. (line 170) -* %parse-param: Parser Function. (line 36) -* %prec <1>: Table of Symbols. (line 175) -* %prec: Contextual Precedence. - (line 6) -* %pure-parser <1>: Table of Symbols. (line 179) -* %pure-parser: Decl Summary. (line 357) -* %require <1>: Table of Symbols. (line 184) -* %require <2>: Require Decl. (line 6) -* %require: Decl Summary. (line 362) -* %right <1>: Using Precedence. (line 6) -* %right <2>: Decl Summary. (line 17) -* %right: Table of Symbols. (line 188) -* %skeleton <1>: Decl Summary. (line 366) -* %skeleton: Table of Symbols. (line 192) -* %start <1>: Table of Symbols. (line 196) -* %start <2>: Decl Summary. (line 34) -* %start: Start Decl. (line 6) -* %token <1>: Decl Summary. (line 13) -* %token <2>: Token Decl. (line 6) -* %token <3>: Java Declarations Summary. - (line 29) -* %token: Table of Symbols. (line 200) -* %token-table <1>: Decl Summary. (line 374) -* %token-table: Table of Symbols. (line 204) -* %type <1>: Java Declarations Summary. - (line 33) -* %type <2>: Type Decl. (line 6) -* %type <3>: Table of Symbols. (line 208) -* %type: Decl Summary. (line 30) -* %union <1>: Decl Summary. (line 9) -* %union <2>: Union Decl. (line 6) -* %union: Table of Symbols. (line 217) -* %verbose: Decl Summary. (line 407) -* %yacc: Decl Summary. (line 413) -* *yypstate_new: Parser Create Function. - (line 15) -* /*: Table of Symbols. (line 33) -* :: Table of Symbols. (line 36) -* ;: Table of Symbols. (line 40) -* <*> <1>: Destructor Decl. (line 6) -* <*>: Table of Symbols. (line 47) -* <> <1>: Destructor Decl. (line 6) -* <>: Table of Symbols. (line 56) -* @$ <1>: Action Features. (line 98) -* @$ <2>: Java Action Features. - (line 39) -* @$ <3>: Table of Symbols. (line 7) -* @$: Actions and Locations. - (line 6) -* @N <1>: Action Features. (line 104) -* @N <2>: Actions and Locations. - (line 6) -* @N <3>: Table of Symbols. (line 11) -* @N <4>: Action Features. (line 104) -* @N: Java Action Features. - (line 35) -* abstract syntax tree: Implementing Gotos/Loops. - (line 17) -* action: Actions. (line 6) -* action data types: Action Types. (line 6) -* action features summary: Action Features. (line 6) -* actions in mid-rule <1>: Mid-Rule Actions. (line 6) -* actions in mid-rule: Destructor Decl. (line 88) -* actions, location: Actions and Locations. - (line 6) -* actions, semantic: Semantic Actions. (line 6) -* additional C code section: Epilogue. (line 6) -* algorithm of parser: Algorithm. (line 6) -* ambiguous grammars <1>: Generalized LR Parsing. - (line 6) -* ambiguous grammars: Language and Grammar. - (line 33) -* associativity: Why Precedence. (line 33) -* AST: Implementing Gotos/Loops. - (line 17) -* Backus-Naur form: Language and Grammar. - (line 16) -* begin of Location: Java Location Values. - (line 21) -* begin on location: C++ Location Values. (line 44) -* Bison declaration summary: Decl Summary. (line 6) -* Bison declarations: Declarations. (line 6) -* Bison declarations (introduction): Bison Declarations. (line 6) -* Bison grammar: Grammar in Bison. (line 6) -* Bison invocation: Invocation. (line 6) -* Bison parser: Bison Parser. (line 6) -* Bison parser algorithm: Algorithm. (line 6) -* Bison symbols, table of: Table of Symbols. (line 6) -* Bison utility: Bison Parser. (line 6) -* bison-i18n.m4: Internationalization. - (line 20) -* bison-po: Internationalization. - (line 6) -* BISON_I18N: Internationalization. - (line 27) -* BISON_LOCALEDIR: Internationalization. - (line 27) -* BNF: Language and Grammar. - (line 16) -* braced code: Rules. (line 31) -* C code, section for additional: Epilogue. (line 6) -* C-language interface: Interface. (line 6) -* calc: Infix Calc. (line 6) -* calculator, infix notation: Infix Calc. (line 6) -* calculator, location tracking: Location Tracking Calc. - (line 6) -* calculator, multi-function: Multi-function Calc. (line 6) -* calculator, simple: RPN Calc. (line 6) -* character token: Symbols. (line 31) -* column on position: C++ Location Values. (line 25) -* columns on location: C++ Location Values. (line 48) -* columns on position: C++ Location Values. (line 28) -* compiling the parser: Rpcalc Compile. (line 6) -* conflicts <1>: Shift/Reduce. (line 6) -* conflicts <2>: Merging GLR Parses. (line 6) -* conflicts <3>: GLR Parsers. (line 6) -* conflicts: Simple GLR Parsers. (line 6) -* conflicts, reduce/reduce: Reduce/Reduce. (line 6) -* conflicts, suppressing warnings of: Expect Decl. (line 6) -* context-dependent precedence: Contextual Precedence. - (line 6) -* context-free grammar: Language and Grammar. - (line 6) -* controlling function: Rpcalc Main. (line 6) -* core, item set: Understanding. (line 129) -* dangling else: Shift/Reduce. (line 6) -* data type of locations: Location Type. (line 6) -* data types in actions: Action Types. (line 6) -* data types of semantic values: Value Type. (line 6) -* debug_level on parser: C++ Parser Interface. - (line 31) -* debug_stream on parser: C++ Parser Interface. - (line 26) -* debugging: Tracing. (line 6) -* declaration summary: Decl Summary. (line 6) -* declarations: Prologue. (line 6) -* declarations section: Prologue. (line 6) -* declarations, Bison: Declarations. (line 6) -* declarations, Bison (introduction): Bison Declarations. (line 6) -* declaring literal string tokens: Token Decl. (line 6) -* declaring operator precedence: Precedence Decl. (line 6) -* declaring the start symbol: Start Decl. (line 6) -* declaring token type names: Token Decl. (line 6) -* declaring value types: Union Decl. (line 6) -* declaring value types, nonterminals: Type Decl. (line 6) -* default action: Actions. (line 50) -* default data type: Value Type. (line 6) -* default location type: Location Type. (line 6) -* default stack limit: Memory Management. (line 30) -* default start symbol: Start Decl. (line 6) -* deferred semantic actions: GLR Semantic Actions. - (line 6) -* defining language semantics: Semantics. (line 6) -* discarded symbols: Destructor Decl. (line 98) -* discarded symbols, mid-rule actions: Mid-Rule Actions. (line 59) -* else, dangling: Shift/Reduce. (line 6) -* end of Location: Java Location Values. - (line 22) -* end on location: C++ Location Values. (line 45) -* epilogue: Epilogue. (line 6) -* error <1>: Error Recovery. (line 20) -* error: Table of Symbols. (line 108) -* error on parser: C++ Parser Interface. - (line 37) -* error recovery: Error Recovery. (line 6) -* error recovery, mid-rule actions: Mid-Rule Actions. (line 59) -* error recovery, simple: Simple Error Recovery. - (line 6) -* error reporting function: Error Reporting. (line 6) -* error reporting routine: Rpcalc Error. (line 6) -* examples, simple: Examples. (line 6) -* exercises: Exercises. (line 6) -* file format: Grammar Layout. (line 6) -* file on position: C++ Location Values. (line 13) -* finite-state machine: Parser States. (line 6) -* formal grammar: Grammar in Bison. (line 6) -* format of grammar file: Grammar Layout. (line 6) -* freeing discarded symbols: Destructor Decl. (line 6) -* frequently asked questions: FAQ. (line 6) -* generalized LR (GLR) parsing <1>: Generalized LR Parsing. - (line 6) -* generalized LR (GLR) parsing <2>: Language and Grammar. - (line 33) -* generalized LR (GLR) parsing: GLR Parsers. (line 6) -* generalized LR (GLR) parsing, ambiguous grammars: Merging GLR Parses. - (line 6) -* generalized LR (GLR) parsing, unambiguous grammars: Simple GLR Parsers. - (line 6) -* getDebugLevel on YYParser: Java Parser Interface. - (line 67) -* getDebugStream on YYParser: Java Parser Interface. - (line 62) -* getEndPos on Lexer: Java Scanner Interface. - (line 39) -* getLVal on Lexer: Java Scanner Interface. - (line 47) -* getStartPos on Lexer: Java Scanner Interface. - (line 38) -* gettext: Internationalization. - (line 6) -* glossary: Glossary. (line 6) -* GLR parsers and inline: Compiler Requirements. - (line 6) -* GLR parsers and yychar: GLR Semantic Actions. - (line 10) -* GLR parsers and yyclearin: GLR Semantic Actions. - (line 18) -* GLR parsers and YYERROR: GLR Semantic Actions. - (line 28) -* GLR parsers and yylloc: GLR Semantic Actions. - (line 10) -* GLR parsers and YYLLOC_DEFAULT: Location Default Action. - (line 6) -* GLR parsers and yylval: GLR Semantic Actions. - (line 10) -* GLR parsing <1>: Language and Grammar. - (line 33) -* GLR parsing <2>: Generalized LR Parsing. - (line 6) -* GLR parsing: GLR Parsers. (line 6) -* GLR parsing, ambiguous grammars: Merging GLR Parses. (line 6) -* GLR parsing, unambiguous grammars: Simple GLR Parsers. (line 6) -* grammar file: Grammar Layout. (line 6) -* grammar rule syntax: Rules. (line 6) -* grammar rules section: Grammar Rules. (line 6) -* grammar, Bison: Grammar in Bison. (line 6) -* grammar, context-free: Language and Grammar. - (line 6) -* grouping, syntactic: Language and Grammar. - (line 47) -* i18n: Internationalization. - (line 6) -* infix notation calculator: Infix Calc. (line 6) -* inline: Compiler Requirements. - (line 6) -* interface: Interface. (line 6) -* internationalization: Internationalization. - (line 6) -* introduction: Introduction. (line 6) -* invoking Bison: Invocation. (line 6) -* item: Understanding. (line 107) -* item set core: Understanding. (line 129) -* kernel, item set: Understanding. (line 129) -* LALR(1): Mystery Conflicts. (line 36) -* LALR(1) grammars: Language and Grammar. - (line 22) -* language semantics, defining: Semantics. (line 6) -* layout of Bison grammar: Grammar Layout. (line 6) -* left recursion: Recursion. (line 16) -* lex-param: Pure Calling. (line 31) -* lexical analyzer: Lexical. (line 6) -* lexical analyzer, purpose: Bison Parser. (line 6) -* lexical analyzer, writing: Rpcalc Lexer. (line 6) -* lexical tie-in: Lexical Tie-ins. (line 6) -* line on position: C++ Location Values. (line 19) -* lines on location: C++ Location Values. (line 49) -* lines on position: C++ Location Values. (line 22) -* literal string token: Symbols. (line 53) -* literal token: Symbols. (line 31) -* location <1>: Locations Overview. (line 6) -* location: Locations. (line 6) -* location actions: Actions and Locations. - (line 6) -* Location on Location: Java Location Values. - (line 25) -* location tracking calculator: Location Tracking Calc. - (line 6) -* location, textual <1>: Locations. (line 6) -* location, textual: Locations Overview. (line 6) -* location_value_type: C++ Parser Interface. - (line 16) -* lookahead token: Lookahead. (line 6) -* LR(1): Mystery Conflicts. (line 36) -* LR(1) grammars: Language and Grammar. - (line 22) -* ltcalc: Location Tracking Calc. - (line 6) -* main function in simple example: Rpcalc Main. (line 6) -* memory exhaustion: Memory Management. (line 6) -* memory management: Memory Management. (line 6) -* mfcalc: Multi-function Calc. (line 6) -* mid-rule actions <1>: Destructor Decl. (line 88) -* mid-rule actions: Mid-Rule Actions. (line 6) -* multi-function calculator: Multi-function Calc. (line 6) -* multicharacter literal: Symbols. (line 53) -* mutual recursion: Recursion. (line 32) -* NLS: Internationalization. - (line 6) -* nondeterministic parsing <1>: Generalized LR Parsing. - (line 6) -* nondeterministic parsing: Language and Grammar. - (line 33) -* nonterminal symbol: Symbols. (line 6) -* nonterminal, useless: Understanding. (line 62) -* operator precedence: Precedence. (line 6) -* operator precedence, declaring: Precedence Decl. (line 6) -* operator+ on location: C++ Location Values. (line 53) -* operator+ on position: C++ Location Values. (line 33) -* operator+= on location: C++ Location Values. (line 57) -* operator+= on position: C++ Location Values. (line 31) -* operator- on position: C++ Location Values. (line 36) -* operator-= on position: C++ Location Values. (line 35) -* operator<< on position: C++ Location Values. (line 40) -* options for invoking Bison: Invocation. (line 6) -* overflow of parser stack: Memory Management. (line 6) -* parse error: Error Reporting. (line 6) -* parse on parser: C++ Parser Interface. - (line 23) -* parse on YYParser: Java Parser Interface. - (line 54) -* parser: Bison Parser. (line 6) -* parser on parser: C++ Parser Interface. - (line 19) -* parser stack: Algorithm. (line 6) -* parser stack overflow: Memory Management. (line 6) -* parser state: Parser States. (line 6) -* pointed rule: Understanding. (line 107) -* polish notation calculator: RPN Calc. (line 6) -* precedence declarations: Precedence Decl. (line 6) -* precedence of operators: Precedence. (line 6) -* precedence, context-dependent: Contextual Precedence. - (line 6) -* precedence, unary operator: Contextual Precedence. - (line 6) -* preventing warnings about conflicts: Expect Decl. (line 6) -* Prologue <1>: Decl Summary. (line 129) -* Prologue <2>: Prologue. (line 6) -* Prologue: Decl Summary. (line 50) -* Prologue Alternatives: Prologue Alternatives. - (line 6) -* pure parser: Pure Decl. (line 6) -* push parser: Push Decl. (line 6) -* questions: FAQ. (line 6) -* recovering: Java Action Features. - (line 59) -* recovering on YYParser: Java Parser Interface. - (line 58) -* recovery from errors: Error Recovery. (line 6) -* recursive rule: Recursion. (line 6) -* reduce/reduce conflict: Reduce/Reduce. (line 6) -* reduce/reduce conflicts <1>: GLR Parsers. (line 6) -* reduce/reduce conflicts <2>: Simple GLR Parsers. (line 6) -* reduce/reduce conflicts: Merging GLR Parses. (line 6) -* reduction: Algorithm. (line 6) -* reentrant parser: Pure Decl. (line 6) -* requiring a version of Bison: Require Decl. (line 6) -* return YYABORT;: Java Action Features. - (line 43) -* return YYACCEPT;: Java Action Features. - (line 47) -* return YYERROR;: Java Action Features. - (line 51) -* return YYFAIL;: Java Action Features. - (line 55) -* reverse polish notation: RPN Calc. (line 6) -* right recursion: Recursion. (line 16) -* rpcalc: RPN Calc. (line 6) -* rule syntax: Rules. (line 6) -* rule, pointed: Understanding. (line 107) -* rule, useless: Understanding. (line 62) -* rules section for grammar: Grammar Rules. (line 6) -* running Bison (introduction): Rpcalc Generate. (line 6) -* semantic actions: Semantic Actions. (line 6) -* semantic value: Semantic Values. (line 6) -* semantic value type: Value Type. (line 6) -* semantic_value_type: C++ Parser Interface. - (line 15) -* set_debug_level on parser: C++ Parser Interface. - (line 32) -* set_debug_stream on parser: C++ Parser Interface. - (line 27) -* setDebugLevel on YYParser: Java Parser Interface. - (line 68) -* setDebugStream on YYParser: Java Parser Interface. - (line 63) -* shift/reduce conflicts <1>: Simple GLR Parsers. (line 6) -* shift/reduce conflicts <2>: Shift/Reduce. (line 6) -* shift/reduce conflicts: GLR Parsers. (line 6) -* shifting: Algorithm. (line 6) -* simple examples: Examples. (line 6) -* single-character literal: Symbols. (line 31) -* stack overflow: Memory Management. (line 6) -* stack, parser: Algorithm. (line 6) -* stages in using Bison: Stages. (line 6) -* start symbol: Language and Grammar. - (line 96) -* start symbol, declaring: Start Decl. (line 6) -* state (of parser): Parser States. (line 6) -* step on location: C++ Location Values. (line 60) -* string token: Symbols. (line 53) -* summary, action features: Action Features. (line 6) -* summary, Bison declaration: Decl Summary. (line 6) -* suppressing conflict warnings: Expect Decl. (line 6) -* symbol: Symbols. (line 6) -* symbol table example: Mfcalc Symbol Table. (line 6) -* symbols (abstract): Language and Grammar. - (line 47) -* symbols in Bison, table of: Table of Symbols. (line 6) -* syntactic grouping: Language and Grammar. - (line 47) -* syntax error: Error Reporting. (line 6) -* syntax of grammar rules: Rules. (line 6) -* terminal symbol: Symbols. (line 6) -* textual location <1>: Locations Overview. (line 6) -* textual location: Locations. (line 6) -* token: Language and Grammar. - (line 47) -* token type: Symbols. (line 6) -* token type names, declaring: Token Decl. (line 6) -* token, useless: Understanding. (line 62) -* toString on Location: Java Location Values. - (line 32) -* tracing the parser: Tracing. (line 6) -* unary operator precedence: Contextual Precedence. - (line 6) -* useless nonterminal: Understanding. (line 62) -* useless rule: Understanding. (line 62) -* useless token: Understanding. (line 62) -* using Bison: Stages. (line 6) -* value type, semantic: Value Type. (line 6) -* value types, declaring: Union Decl. (line 6) -* value types, nonterminals, declaring: Type Decl. (line 6) -* value, semantic: Semantic Values. (line 6) -* version requirement: Require Decl. (line 6) -* warnings, preventing: Expect Decl. (line 6) -* writing a lexical analyzer: Rpcalc Lexer. (line 6) -* YYABORT <1>: Table of Symbols. (line 221) -* YYABORT: Parser Function. (line 29) -* YYABORT;: Action Features. (line 28) -* YYACCEPT <1>: Table of Symbols. (line 230) -* YYACCEPT: Parser Function. (line 26) -* YYACCEPT;: Action Features. (line 32) -* YYBACKUP <1>: Table of Symbols. (line 238) -* YYBACKUP: Action Features. (line 36) -* yychar <1>: Action Features. (line 69) -* yychar <2>: Lookahead. (line 47) -* yychar <3>: Table of Symbols. (line 242) -* yychar: GLR Semantic Actions. - (line 10) -* yyclearin <1>: GLR Semantic Actions. - (line 18) -* yyclearin <2>: Table of Symbols. (line 248) -* yyclearin: Error Recovery. (line 97) -* yyclearin;: Action Features. (line 76) -* yydebug <1>: Tracing. (line 6) -* yydebug: Table of Symbols. (line 256) -* YYDEBUG <1>: Table of Symbols. (line 252) -* YYDEBUG: Tracing. (line 12) -* YYEMPTY: Action Features. (line 49) -* YYENABLE_NLS: Internationalization. - (line 27) -* YYEOF: Action Features. (line 52) -* yyerrok <1>: Table of Symbols. (line 261) -* yyerrok: Error Recovery. (line 92) -* yyerrok;: Action Features. (line 81) -* YYERROR: Action Features. (line 56) -* yyerror: Java Action Features. - (line 64) -* YYERROR: Table of Symbols. (line 265) -* yyerror <1>: Table of Symbols. (line 274) -* yyerror: Error Reporting. (line 6) -* YYERROR: GLR Semantic Actions. - (line 28) -* yyerror on Lexer: Java Scanner Interface. - (line 25) -* YYERROR;: Action Features. (line 56) -* YYERROR_VERBOSE: Table of Symbols. (line 278) -* YYINITDEPTH <1>: Table of Symbols. (line 285) -* YYINITDEPTH: Memory Management. (line 32) -* yylex <1>: Table of Symbols. (line 289) -* yylex: Lexical. (line 6) -* yylex on Lexer: Java Scanner Interface. - (line 30) -* yylex on parser: C++ Scanner Interface. - (line 12) -* YYLEX_PARAM: Table of Symbols. (line 294) -* yylloc <1>: Token Locations. (line 6) -* yylloc <2>: Table of Symbols. (line 300) -* yylloc <3>: GLR Semantic Actions. - (line 10) -* yylloc <4>: Action Features. (line 86) -* yylloc <5>: Lookahead. (line 47) -* yylloc: Actions and Locations. - (line 60) -* YYLLOC_DEFAULT: Location Default Action. - (line 6) -* YYLTYPE <1>: Table of Symbols. (line 310) -* YYLTYPE: Token Locations. (line 19) -* yylval <1>: Actions. (line 74) -* yylval <2>: Action Features. (line 92) -* yylval <3>: Table of Symbols. (line 314) -* yylval <4>: GLR Semantic Actions. - (line 10) -* yylval <5>: Lookahead. (line 47) -* yylval: Token Values. (line 6) -* YYMAXDEPTH <1>: Table of Symbols. (line 322) -* YYMAXDEPTH: Memory Management. (line 14) -* yynerrs <1>: Error Reporting. (line 92) -* yynerrs: Table of Symbols. (line 326) -* yyparse <1>: Table of Symbols. (line 332) -* yyparse: Parser Function. (line 6) -* YYPARSE_PARAM: Table of Symbols. (line 365) -* YYParser on YYParser: Java Parser Interface. - (line 41) -* YYPRINT: Tracing. (line 71) -* yypstate_delete <1>: Table of Symbols. (line 336) -* yypstate_delete: Parser Delete Function. - (line 6) -* yypstate_new <1>: Parser Create Function. - (line 6) -* yypstate_new: Table of Symbols. (line 344) -* yypull_parse <1>: Pull Parser Function. - (line 6) -* yypull_parse <2>: Table of Symbols. (line 351) -* yypull_parse: Pull Parser Function. - (line 14) -* yypush_parse <1>: Push Parser Function. - (line 15) -* yypush_parse: Table of Symbols. (line 358) -* YYRECOVERING <1>: Action Features. (line 64) -* YYRECOVERING <2>: Error Recovery. (line 109) -* YYRECOVERING <3>: Action Features. (line 64) -* YYRECOVERING: Table of Symbols. (line 371) -* YYSTACK_USE_ALLOCA: Table of Symbols. (line 376) -* YYSTYPE: Table of Symbols. (line 392) -* | <1>: Table of Symbols. (line 43) -* |: Rules. (line 49) - - - -Tag Table: -Node: Top1174 -Node: Introduction13739 -Node: Conditions15002 -Node: Copying16893 -Node: Concepts54431 -Node: Language and Grammar55612 -Node: Grammar in Bison61501 -Node: Semantic Values63430 -Node: Semantic Actions65536 -Node: GLR Parsers66723 -Node: Simple GLR Parsers69470 -Node: Merging GLR Parses76122 -Node: GLR Semantic Actions80691 -Node: Compiler Requirements82581 -Node: Locations Overview83317 -Node: Bison Parser84770 -Node: Stages87710 -Node: Grammar Layout88998 -Node: Examples90330 -Node: RPN Calc91533 -Node: Rpcalc Declarations92533 -Node: Rpcalc Rules94461 -Node: Rpcalc Input96277 -Node: Rpcalc Line97752 -Node: Rpcalc Expr98880 -Node: Rpcalc Lexer100847 -Node: Rpcalc Main103441 -Node: Rpcalc Error103848 -Node: Rpcalc Generate104881 -Node: Rpcalc Compile106016 -Node: Infix Calc106895 -Node: Simple Error Recovery109658 -Node: Location Tracking Calc111553 -Node: Ltcalc Declarations112249 -Node: Ltcalc Rules113338 -Node: Ltcalc Lexer115354 -Node: Multi-function Calc117677 -Node: Mfcalc Declarations119253 -Node: Mfcalc Rules121300 -Node: Mfcalc Symbol Table122695 -Node: Exercises128871 -Node: Grammar File129385 -Node: Grammar Outline130234 -Node: Prologue131084 -Node: Prologue Alternatives132873 -Node: Bison Declarations142558 -Node: Grammar Rules142986 -Node: Epilogue143457 -Node: Symbols144473 -Node: Rules151176 -Node: Recursion153655 -Node: Semantics155373 -Node: Value Type156472 -Node: Multiple Types157307 -Node: Actions158474 -Node: Action Types161889 -Node: Mid-Rule Actions163201 -Node: Locations169666 -Node: Location Type170317 -Node: Actions and Locations171103 -Node: Location Default Action173564 -Node: Declarations177284 -Node: Require Decl178811 -Node: Token Decl179130 -Node: Precedence Decl181556 -Node: Union Decl183566 -Node: Type Decl185340 -Node: Initial Action Decl186266 -Node: Destructor Decl187037 -Node: Expect Decl192501 -Node: Start Decl194494 -Node: Pure Decl194882 -Node: Push Decl196632 -Node: Decl Summary201131 -Ref: Decl Summary-Footnote-1218017 -Node: Multiple Parsers218221 -Node: Interface219860 -Node: Parser Function221178 -Node: Push Parser Function223194 -Node: Pull Parser Function224004 -Node: Parser Create Function224655 -Node: Parser Delete Function225478 -Node: Lexical226249 -Node: Calling Convention227681 -Node: Token Values230641 -Node: Token Locations231805 -Node: Pure Calling232699 -Node: Error Reporting234580 -Node: Action Features238710 -Node: Internationalization243012 -Node: Algorithm245553 -Node: Lookahead247919 -Node: Shift/Reduce250128 -Node: Precedence253023 -Node: Why Precedence253679 -Node: Using Precedence255552 -Node: Precedence Examples256529 -Node: How Precedence257239 -Node: Contextual Precedence258396 -Node: Parser States260192 -Node: Reduce/Reduce261436 -Node: Mystery Conflicts264977 -Node: Generalized LR Parsing268684 -Node: Memory Management273303 -Node: Error Recovery275516 -Node: Context Dependency280819 -Node: Semantic Tokens281668 -Node: Lexical Tie-ins284738 -Node: Tie-in Recovery286315 -Node: Debugging288492 -Node: Understanding289158 -Node: Tracing300317 -Node: Invocation304419 -Node: Bison Options305818 -Node: Option Cross Key312822 -Node: Yacc Library313874 -Node: Other Languages314699 -Node: C++ Parsers315026 -Node: C++ Bison Interface315523 -Node: C++ Semantic Values316791 -Ref: C++ Semantic Values-Footnote-1317733 -Node: C++ Location Values317886 -Node: C++ Parser Interface320259 -Node: C++ Scanner Interface321976 -Node: A Complete C++ Example322678 -Node: Calc++ --- C++ Calculator323620 -Node: Calc++ Parsing Driver324134 -Node: Calc++ Parser327915 -Node: Calc++ Scanner331705 -Node: Calc++ Top Level335131 -Node: Java Parsers335780 -Node: Java Bison Interface336457 -Node: Java Semantic Values338420 -Node: Java Location Values340034 -Node: Java Parser Interface341590 -Node: Java Scanner Interface344828 -Node: Java Action Features347013 -Node: Java Differences349740 -Ref: Java Differences-Footnote-1352315 -Node: Java Declarations Summary352465 -Node: FAQ356713 -Node: Memory Exhausted357660 -Node: How Can I Reset the Parser357970 -Node: Strings are Destroyed360239 -Node: Implementing Gotos/Loops361828 -Node: Multiple start-symbols363111 -Node: Secure? Conform?364656 -Node: I can't build Bison365104 -Node: Where can I find help?365822 -Node: Bug Reports366615 -Node: More Languages368076 -Node: Beta Testing368434 -Node: Mailing Lists369308 -Node: Table of Symbols369519 -Node: Glossary384901 -Node: Copying This Manual391798 -Node: Index414191 - -End Tag Table diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/doc/gpl-3.0.texi b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/doc/gpl-3.0.texi deleted file mode 100644 index 1908d1f8..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/doc/gpl-3.0.texi +++ /dev/null @@ -1,717 +0,0 @@ -@c The GNU General Public License. -@center Version 3, 29 June 2007 - -@c This file is intended to be included within another document, -@c hence no sectioning command or @node. - -@display -Copyright @copyright{} 2007 Free Software Foundation, Inc. @url{http://fsf.org/} - -Everyone is permitted to copy and distribute verbatim copies of this -license document, but changing it is not allowed. -@end display - -@heading Preamble - -The GNU General Public License is a free, copyleft license for -software and other kinds of works. - -The licenses for most software and other practical works are designed -to take away your freedom to share and change the works. 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If not, see @url{http://www.gnu.org/licenses/}. -@end smallexample - -Also add information on how to contact you by electronic and paper mail. - -If the program does terminal interaction, make it output a short -notice like this when it starts in an interactive mode: - -@smallexample -@var{program} Copyright (C) @var{year} @var{name of author} -This program comes with ABSOLUTELY NO WARRANTY; for details type @samp{show w}. -This is free software, and you are welcome to redistribute it -under certain conditions; type @samp{show c} for details. -@end smallexample - -The hypothetical commands @samp{show w} and @samp{show c} should show -the appropriate parts of the General Public License. Of course, your -program's commands might be different; for a GUI interface, you would -use an ``about box''. - -You should also get your employer (if you work as a programmer) or school, -if any, to sign a ``copyright disclaimer'' for the program, if necessary. -For more information on this, and how to apply and follow the GNU GPL, see -@url{http://www.gnu.org/licenses/}. - -The GNU General Public License does not permit incorporating your -program into proprietary programs. If your program is a subroutine -library, you may consider it more useful to permit linking proprietary -applications with the library. If this is what you want to do, use -the GNU Lesser General Public License instead of this License. But -first, please read @url{http://www.gnu.org/philosophy/why-not-lgpl.html}. diff --git a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/etc/README b/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/etc/README deleted file mode 100644 index d7fce478..00000000 --- a/gnuwin32/contrib/bison/2.4.1/bison-2.4.1-src/etc/README +++ /dev/null @@ -1,41 +0,0 @@ -A directory of tools provided to people using CVS Bison. None of -these is distributed. - -* bench.pl -A primitive Perl script to run benches. Currently its only bench is -the usual calculator: it has a lightweight processing part (but not -null), so it is really emphasizing the cost of the whole parsing -(including scanning and I/O). - -Set the envvars BISON and CC to the programs and flags you want to -use. They default to bison and gcc. To run a non-installed bison -from a tarball built in _build, I suggest the following. - - BISON=_build/tests/bison CC='gcc -O2' ./bench.pl - -(The _build/tests/bison wrapper makes sure that _build/src/bison will -use the tarballs' skeletons, not those already installed as a -straightforward use of _build/src/bison would.) - --- - -Copyright (C) 2006 Free Software Foundation, Inc. - -This file is part of Bison, the GNU Compiler Compiler. - -This program is free software: you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation, either version 3 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program. If not, see <http://www.gnu.org/licenses/>. - -Local Variables: -mode: outline -End: |