diff options
Diffstat (limited to 'chromium/third_party/cygwin/lib/perl5/5.10/i686-cygwin/B/Showlex.pm')
| -rw-r--r-- | chromium/third_party/cygwin/lib/perl5/5.10/i686-cygwin/B/Showlex.pm | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/chromium/third_party/cygwin/lib/perl5/5.10/i686-cygwin/B/Showlex.pm b/chromium/third_party/cygwin/lib/perl5/5.10/i686-cygwin/B/Showlex.pm deleted file mode 100644 index 3b261a337df..00000000000 --- a/chromium/third_party/cygwin/lib/perl5/5.10/i686-cygwin/B/Showlex.pm +++ /dev/null @@ -1,205 +0,0 @@ -package B::Showlex; - -our $VERSION = '1.02'; - -use strict; -use B qw(svref_2object comppadlist class); -use B::Terse (); -use B::Concise (); - -# -# Invoke as -# perl -MO=Showlex,foo bar.pl -# to see the names of lexical variables used by &foo -# or as -# perl -MO=Showlex bar.pl -# to see the names of file scope lexicals used by bar.pl -# - - -# borrowed from B::Concise -our $walkHandle = \*STDOUT; - -sub walk_output { # updates $walkHandle - $walkHandle = B::Concise::walk_output(@_); - #print "got $walkHandle"; - #print $walkHandle "using it"; - $walkHandle; -} - -sub shownamearray { - my ($name, $av) = @_; - my @els = $av->ARRAY; - my $count = @els; - my $i; - print $walkHandle "$name has $count entries\n"; - for ($i = 0; $i < $count; $i++) { - my $sv = $els[$i]; - if (class($sv) ne "SPECIAL") { - printf $walkHandle "$i: %s (0x%lx) %s\n", class($sv), $$sv, $sv->PVX; - } else { - printf $walkHandle "$i: %s\n", $sv->terse; - #printf $walkHandle "$i: %s\n", B::Concise::concise_sv($sv); - } - } -} - -sub showvaluearray { - my ($name, $av) = @_; - my @els = $av->ARRAY; - my $count = @els; - my $i; - print $walkHandle "$name has $count entries\n"; - for ($i = 0; $i < $count; $i++) { - printf $walkHandle "$i: %s\n", $els[$i]->terse; - #print $walkHandle "$i: %s\n", B::Concise::concise_sv($els[$i]); - } -} - -sub showlex { - my ($objname, $namesav, $valsav) = @_; - shownamearray("Pad of lexical names for $objname", $namesav); - showvaluearray("Pad of lexical values for $objname", $valsav); -} - -my ($newlex, $nosp1); # rendering state vars - -sub newlex { # drop-in for showlex - my ($objname, $names, $vals) = @_; - my @names = $names->ARRAY; - my @vals = $vals->ARRAY; - my $count = @names; - print $walkHandle "$objname Pad has $count entries\n"; - printf $walkHandle "0: %s\n", $names[0]->terse unless $nosp1; - for (my $i = 1; $i < $count; $i++) { - printf $walkHandle "$i: %s = %s\n", $names[$i]->terse, $vals[$i]->terse - unless $nosp1 and $names[$i]->terse =~ /SPECIAL/; - } -} - -sub showlex_obj { - my ($objname, $obj) = @_; - $objname =~ s/^&main::/&/; - showlex($objname, svref_2object($obj)->PADLIST->ARRAY) if !$newlex; - newlex ($objname, svref_2object($obj)->PADLIST->ARRAY) if $newlex; -} - -sub showlex_main { - showlex("comppadlist", comppadlist->ARRAY) if !$newlex; - newlex ("main", comppadlist->ARRAY) if $newlex; -} - -sub compile { - my @options = grep(/^-/, @_); - my @args = grep(!/^-/, @_); - for my $o (@options) { - $newlex = 1 if $o eq "-newlex"; - $nosp1 = 1 if $o eq "-nosp"; - } - - return \&showlex_main unless @args; - return sub { - my $objref; - foreach my $objname (@args) { - next unless $objname; # skip nulls w/o carping - - if (ref $objname) { - print $walkHandle "B::Showlex::compile($objname)\n"; - $objref = $objname; - } else { - $objname = "main::$objname" unless $objname =~ /::/; - print $walkHandle "$objname:\n"; - no strict 'refs'; - die "err: unknown function ($objname)\n" - unless *{$objname}{CODE}; - $objref = \&$objname; - } - showlex_obj($objname, $objref); - } - } -} - -1; - -__END__ - -=head1 NAME - -B::Showlex - Show lexical variables used in functions or files - -=head1 SYNOPSIS - - perl -MO=Showlex[,-OPTIONS][,SUBROUTINE] foo.pl - -=head1 DESCRIPTION - -When a comma-separated list of subroutine names is given as options, Showlex -prints the lexical variables used in those subroutines. Otherwise, it prints -the file-scope lexicals in the file. - -=head1 EXAMPLES - -Traditional form: - - $ perl -MO=Showlex -e 'my ($i,$j,$k)=(1,"foo")' - Pad of lexical names for comppadlist has 4 entries - 0: SPECIAL #1 &PL_sv_undef - 1: PVNV (0x9db0fb0) $i - 2: PVNV (0x9db0f38) $j - 3: PVNV (0x9db0f50) $k - Pad of lexical values for comppadlist has 5 entries - 0: SPECIAL #1 &PL_sv_undef - 1: NULL (0x9da4234) - 2: NULL (0x9db0f2c) - 3: NULL (0x9db0f44) - 4: NULL (0x9da4264) - -e syntax OK - -New-style form: - - $ perl -MO=Showlex,-newlex -e 'my ($i,$j,$k)=(1,"foo")' - main Pad has 4 entries - 0: SPECIAL #1 &PL_sv_undef - 1: PVNV (0xa0c4fb8) "$i" = NULL (0xa0b8234) - 2: PVNV (0xa0c4f40) "$j" = NULL (0xa0c4f34) - 3: PVNV (0xa0c4f58) "$k" = NULL (0xa0c4f4c) - -e syntax OK - -New form, no specials, outside O framework: - - $ perl -MB::Showlex -e \ - 'my ($i,$j,$k)=(1,"foo"); B::Showlex::compile(-newlex,-nosp)->()' - main Pad has 4 entries - 1: PVNV (0x998ffb0) "$i" = IV (0x9983234) 1 - 2: PVNV (0x998ff68) "$j" = PV (0x998ff5c) "foo" - 3: PVNV (0x998ff80) "$k" = NULL (0x998ff74) - -Note that this example shows the values of the lexicals, whereas the other -examples did not (as they're compile-time only). - -=head2 OPTIONS - -The C<-newlex> option produces a more readable C<< name => value >> format, -and is shown in the second example above. - -The C<-nosp> option eliminates reporting of SPECIALs, such as C<0: SPECIAL -#1 &PL_sv_undef> above. Reporting of SPECIALs can sometimes overwhelm -your declared lexicals. - -=head1 SEE ALSO - -C<B::Showlex> can also be used outside of the O framework, as in the third -example. See C<B::Concise> for a fuller explanation of reasons. - -=head1 TODO - -Some of the reported info, such as hex addresses, is not particularly -valuable. Other information would be more useful for the typical -programmer, such as line-numbers, pad-slot reuses, etc.. Given this, --newlex isnt a particularly good flag-name. - -=head1 AUTHOR - -Malcolm Beattie, C<mbeattie@sable.ox.ac.uk> - -=cut |