| Commit message (Collapse) | Author | Age | Files | Lines |
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Side note: QHash has squeeze(), but there's no shrink_to_fit on
std::unordered_map.
[ChangeLog][QtCore][QByteArray] Added shrink_to_fit().
[ChangeLog][QtCore][QString] Added shrink_to_fit().
[ChangeLog][QtCore][QVarLengthArray] Added shrink_to_fit().
[ChangeLog][QtCore][QVector] Added shrink_to_fit().
Change-Id: Ifd7d28c9bed70727be6308f0191a188201784f61
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
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methods
Like the qt_compare_strings()/qCompareStrings() split, distinguish
between the internal and exported functions.
Because of the circular dependency between qstring.h and qvector.h,
the inline toUcs4() function has to be in qvector.h.
At some point, we need to refactor the headers so qvector.h is lower
in the dependency chain than qstring.h. It's not the first time this
bites.
Change-Id: Ief9f3bd92c83cdd1f31c51c700f42e146916eefd
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Conflicts:
src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp
src/platformsupport/fontdatabases/freetype/qfreetypefontdatabase.cpp
src/plugins/platformthemes/gtk3/qgtk3dialoghelpers.cpp
src/widgets/widgets/qtabbar.cpp
Change-Id: Iaa9daee5f7a6490d56257a3824730a35751ceb05
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Some compilers are known to complain about this with a warning. GCC
complains about const on return values on -Wignored-qualifiers (enabled
at -Wextra), so it's not too much of a jump to assume that others do
too. Besides, this is not Qt Library API policy. As maintainer for
QtCore, I'm exercising my prerrogative in specifying certain unspecified
parts of the coding style, like I've done for constructor initializer
lists.
Since all the classes involved are exported (including QVector, through
derived classes), we can't remove the qualifier until Qt 6, since there
are compilers known to encode the qualifier in the mangled name
(suncc). I'm not introducing #ifdef to silence unknown compilers unless
we get an actual complaint.
Change-Id: I33850dcdb2ce4a47878efffd14a876edef843c46
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Conflicts:
examples/network/network.pro
mkspecs/features/mac/default_post.prf
src/corelib/io/qfilesystemengine_win.cpp
src/corelib/io/qprocess.cpp
src/corelib/io/qprocess.h
src/corelib/io/qprocess_p.h
src/corelib/io/qprocess_unix.cpp
src/corelib/io/qprocess_win.cpp
src/corelib/thread/qmutex.cpp
src/platformsupport/fontdatabases/windows/windows.pri
src/plugins/platforms/eglfs/eglfsdeviceintegration.pro
tests/auto/corelib/io/io.pro
Change-Id: I8a27e0e141454818bba9c433200a4e84a88d147e
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This fixes compiling an application using QVector and -Wshorten-64-to-32
on a 64-bit system without getting this warning:
... 5.8/clang_64/lib/QtCore.framework/Headers/qvector.h:695:18:
warning: implicit conversion loses integer precision: 'typename
iterator_traits<QString *>::difference_type' (aka 'long') to 'int'
[-Wshorten-64-to-32]
int offset = std::distance(d->begin(), before);
~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
... 5.8/clang_64/lib/QtCore.framework/Headers/qvector.h:731:35:
warning: implicit conversion loses integer precision: 'long' to
'const int' [-Wshorten-64-to-32]
const int itemsToErase = aend - abegin;
~~~~~~~~~~~~ ~~~~~^~~~~~~~
... 5.8/clang_64/lib/QtCore.framework/Headers/qvector.h:740:39:
warning: implicit conversion loses integer precision: 'long' to
'const int' [-Wshorten-64-to-32]
const int itemsUntouched = abegin - d->begin();
~~~~~~~~~~~~~~ ~~~~~~~^~~~~~~~~~~~
Change-Id: I52d85908f4aac20c7e9ac8063ac760ce52f85541
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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... except in QList.
When dafa3618 introduced isRelocatable and QTypeInfoQuery, the
intention was to decouple the memory layout of QList from the
reallocation optimizations in QVector. This never happened, as
QVector (and QVarLengthArray) continue to use isStatic to this
day.
Fix by porting both QVector and QVLA to QTypeInfoQuery and
isRelocatable.
Change-Id: I6951f2cf21f0cbb24e2dbd38f80f1bd82007d394
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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In this case, the issue was ICC, when compiling QtQml:
qv4sequenceobject.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __cdecl QList<class QItemSelectionRange>::replace(int,class QItemSelectionRange const &)" (__imp_?replace@?$QList@VQItemSelectionRange@@@@QEAAXHAEBVQItemSelectionRange@@@Z)
referenced in function "public: static bool __cdecl QV4::QQmlSequence<class QItemSelection>::deleteIndexedProperty(struct QV4::Managed *,unsigned int)" (?deleteIndexedProperty@?$QQmlSequence@VQItemSelection@@@QV4@@SA_NPEAUManaged@2@I@Z)
This applies the same fix as qvector.h has had for ages due to QPolygon.
Change-Id: I15b62e0f9cec482fbb40fffd1490d791db5056bc
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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Conflicts:
src/widgets/itemviews/qabstractitemview.cpp
src/widgets/itemviews/qabstractitemview_p.h
Change-Id: I54589b1365103cb1749186af92aab03a49c94b64
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It crashed when d was equal to Data::unsharableEmpty().
Task-number: QTBUG-51758
Change-Id: If9f2a7d11892507135f4dc0aeef909f59b7478fc
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@theqtcompany.com>
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Also made a small comment fix
Task-number: QTBUG-53605
Change-Id: Ica9a06fe7a70f92f2a19a6df3ffdeaf1985e2eb6
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@theqtcompany.com>
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Conflicts:
configure
src/3rdparty/angle/src/libANGLE/renderer/d3d/d3d11/Renderer11.cpp
src/network/access/qnetworkaccessmanager.cpp
src/plugins/platforms/cocoa/qcocoacolordialoghelper.mm
src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmcursor.cpp
src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmcursor.h
src/widgets/widgets/qlineedit_p.cpp
src/widgets/widgets/qlineedit_p.h
src/winmain/winmain.pro
tests/auto/corelib/io/qstorageinfo/tst_qstorageinfo.cpp
tests/auto/dbus/qdbusconnection/tst_qdbusconnection.cpp
tests/auto/dbus/qdbusconnection/tst_qdbusconnection.h
tests/auto/testlib/selftests/expected_cmptest.teamcity
tests/auto/testlib/selftests/expected_cmptest.txt
tests/auto/widgets/itemviews/qtableview/tst_qtableview.cpp
tools/configure/configureapp.cpp
Change-Id: Ib9997b0d0f91946e4081d36c0c6b696c5c983b2a
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The C and C++ standards say it's undefined whether the preprocessor
supports macros that expand to defined() will operate as an ifdef.
Clang 3.9 started complaining about that fact.
One solution was to change QT_SUPPORTS to check for zero or one, which
means we need to change the #defines QT_NO_xxx to #define QT_NO_xxx 1.
The C standard says we don't need to #define to 0, as an unknown token
is interpreted as zero. However, that might produce a warning (GCC with
-Wundef), so changing the macro this way is not recommended.
Instead, we deprecate the macro and replace the uses with #ifdef/ndef.
Change-Id: Id75834dab9ed466e94c7ffff1444874d5680b96a
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Conflicts:
mkspecs/features/qml_module.prf
mkspecs/features/qt_common.prf
src/gui/text/qzip.cpp
src/plugins/platforms/cocoa/qnsview.mm
src/plugins/platforms/windows/array.h
src/testlib/qtestcase.cpp
src/widgets/dialogs/qfilesystemmodel.h
Change-Id: Ie41c5868415b81f7693c80e045497035504bb210
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The MSVC STL warns when passing naked pointers as non-bounded
iterators to algorithms such as std::equal and std::copy, in
an attempt to inform users that the range specified by that
iterator has an implicit minimum size that the caller of the
algorithm must ensure is met:
warning C4996: 'std::_Equal1': Function call with parameters that may be unsafe - \
this call relies on the caller to check that the passed values are correct. To \
disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to \
use Visual C++ 'Checked Iterators'
When building Qt, as well as when building user projects with
qmake (cf. 0a76b6bc7f98900ea884cd10ccca1a332e5bdba5), we
globally disable this warning (with -D_SCL_SECURE_NO_WARNINGS),
but since we started using STL algorithms in public headers (e.g.
in qvector.h), users get this warning in their own projects now,
unless they, too, define said macro. But such a requirement is
against the Qt policy to have headers that are warning-free as
much as possible.
The suggested way of fixing this warning is to wrap the naked
pointer in a stdext::unchecked_array_iterator before passing it
to the algorithm, cf. examples in
https://msdn.microsoft.com/en-us/library/ttcz0bys%28v=vs.120%29.aspx
or, together with the capacity-made-explicit, in a
stdext::checked_array_iterator.
To avoid ifdefs for platforms that don't have these extensions
(which, incidentally, for the unchecked case, includes MSVC 2012),
wrap the calls in macros.
The end game here is to drop -D_SCL_SECURE_NO_WARNINGS, at least
for public headers, even though this commit also adds the wrapper
to implementation and private header files.
An alternative to the wrapper would have been the version of
std::equal that takes four iterators. However, that is a C++14
library feature, while this version of Qt still needs to compile
with a C++98 compiler, and, more importantly, there isn't, and
never will be, a corresponding 4-iterator version of std::copy.
Task-number: QTBUG-47948
Done-with: Stephen Kelly <steveire@gmail.com>
Change-Id: I1bbab257fb5f1c5042939c382a412b596112ff26
Reviewed-by: Stephen Kelly <ske@ableton.com>
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If the container being added to is default constructed and has never
been modified, we don't have to do all the checking and iterating.
Instead we can just assign with operator=.
If the LHS is merely empty, we could lose reserve()d capacity, so only
do this for a shared-null LHS.
Change-Id: If1e3342662d10833babc7ab847ada0285073723b
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Milian Wolff <milian.wolff@kdab.com>
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This is what std::vector implementations usually do,
because it minimizes memory fragmentation and useless
allocations since no user will call clear() unless
she intends to append new data afterwards.
Fix calls to resize(0) that show how existing code
tried to work around the issue.
Adjust test. Port from QVERIFY(==) to QCOMPARE as a
drive-by.
[ChangeLog][QtCore][QVector] clear() now preserves
capacity. To shed capacity, call squeeze() or swap
with a default-constructed QVector object, see the
documentation for an example.
Change-Id: I9cebe611a97e027a89e821e64408a4741b31f1f6
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
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From Qt 5.7 -> LGPL v2.1 isn't an option anymore, see
http://blog.qt.io/blog/2016/01/13/new-agreement-with-the-kde-free-qt-foundation/
Updated license headers to use new LGPL header instead of LGPL21 one
(in those files which will be under LGPL v3)
Change-Id: I046ec3e47b1876cd7b4b0353a576b352e3a946d9
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
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...even if reserve() hasn't been called before.
[ChangeLog][QtCore][QVector] resize() will no longer shrink the
capacity. That means resize(0) now reliably preserves capacity().
Task-number: QTBUG-39293
Done-with: Robin Burchell <robin.burchell@viroteck.net>
Change-Id: Ie7e4e597126832990b6cfb83bba875c3963b143e
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: Milian Wolff <milian.wolff@kdab.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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This is low-hanging fruit, for two reasons:
1. The implementation is dead-simple (unlike, say, in QList).
2. It's completely transparent to the QVector user (unlike,
say, emplace_back, which can only be used inside an ifdef).
Change-Id: Iaf750100cf61ced77aa452f0e4e3c4ec36b29639
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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Replaces one copy ctor / assignment with a move ctor / assignment.
Change-Id: I56768db9904283a9be7c87f624a557a64557bc8f
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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[ChangeLog][QtCore] All generic containers (with the exception of
QVarLengthArray, but including QSharedPointer) destroy the
previous state as part of a move-assignment now. Previously, they
would dump it into the right-hand-side object. Note that this is
only true for the generic containers. Other implicitly-shared
types, as well as the non-generic containers QString, QByteArray,
etc. still just swap the contents with the right-hand-side object
when move-assigned into, and, for performance reasons, this will
not change in the forseeable future.
Change-Id: I1f1c684e85400b77bd2e7fba65bde2dce6c1bdde
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Change-Id: Id08e692bbfedb43911ffbbfdf09aa6b68a4aa1f9
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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... instead of a copy.
This has been there since before Qt 5.0.
A quick grep shows it's the only instance of this mistake
in Qt.
Change-Id: I341df34f67544b8ed719254bd57237a9599efb46
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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Excepting QDebug, which doesn't have value semantics.
Change-Id: I43757ef7bba4c1f5b6de9144f12b38ce840cd9f9
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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Change-Id: I67948621313f2e7c69abe7ef95ee82ca64c6512a
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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Convenience to avoid annoying detaching (instead of using at()),
especially on temporary vectors (returned by functions or so).
[ChangeLog][QtCore][QVector] Added the convenience constFirst
and constLast functions.
Change-Id: If61b1f0096f6a7a1c9074340e237cc2376ce3d18
Task-number: QTBUG-46026
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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Conflicts:
src/tools/qdoc/tree.cpp
tests/auto/gui/painting/qcolor/tst_qcolor.cpp
Change-Id: Iaa78f601a63191fa643aabf853520f913f2f0fdc
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Change-Id: Ie0f2eb922500bc3d76852939cf2c5d28d65a43ae
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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QVectors can be compared for equality, so qHash should be overloaded, too.
[ChangeLog][QtCore][QVector] Added qHash(QVector).
Change-Id: I2aacce55d416abf2492631a504a02c6e8fc4ff1c
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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[ChangeLog][QtCore][QVector] Added rbegin(), crbegin(), rend(), crend(),
and reverse_iterator and const_reverse_iterator typedefs.
Task-number: QTBUG-25919
Change-Id: I8dea52a08e7b1a4442e034c22b83be4d25dc2303
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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std::vector has them, too.
[ChangeLog][QtCore][QVector] Added relational operators <, <=, >, >= if the element
type supports operator<.
Change-Id: I0bcb22dfcc43cb0362f17b4e06154ce18646580a
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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The c2m() function converts a const_iterator into an iterator, but
is a broken concept for an implicitly shared container such as
QVector, because the act of calling begin() as the starting point
already detaches and invalidates the c2m argument.
This could be fixed in c2m, but it's too easy for a caller to
cause iterator invalidation even before calling c2m, as QTBUG-44592
showed, so remove the function completely.
Task-number: QTBUG-44592
Change-Id: Ibde8cd1d78a412cc9fb621f743e52f74291aff4f
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Conflicts:
examples/xml/htmlinfo/simpleexample.html
examples/xml/rsslisting/rsslisting.cpp
qmake/generators/win32/msbuild_objectmodel.cpp
src/3rdparty/harfbuzz-ng/src/hb-private.hh
src/corelib/global/qlogging.cpp
src/corelib/io/qstorageinfo_unix.cpp
src/corelib/thread/qwaitcondition_unix.cpp
src/gui/kernel/qguiapplication.cpp
src/plugins/platforms/linuxfb/qlinuxfbintegration.cpp
src/testlib/doc/src/qt-webpages.qdoc
tests/auto/other/qaccessibility/tst_qaccessibility.cpp
Change-Id: Ib272ff0bc30a1a5d51275eb3cd2f201dc82c11ff
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The c2m() function which converts a const_iterator into an iterator
is a broken concept for an implicitly shared container such as
QVector, because the act of calling begin() as the starting
point already detaches and invalidates the c2m argument.
This could be fixed in c2m, but the bug wasn't even in c2m,
but in removeAll(), which called end() before c2m, so the c2m
argument was already invalidated when entering c2m.
The solution is to store the positions as indices instead of
iterators before calling the first detaching function.
Task-number: QTBUG-44592
Change-Id: I66cf4f1277e71148a4d5b5bbfb6a3369ad02db68
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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Qt copyrights are now in The Qt Company, so we could update the source
code headers accordingly. In the same go we should also fix the links to
point to qt.io.
Outdated header.LGPL removed (use header.LGPL21 instead)
Old header.LGPL3 renamed to header.LGPL3-COMM to match actual licensing
combination. New header.LGPL-COMM taken in the use file which were
using old header.LGPL3 (src/plugins/platforms/android/extract.cpp)
Added new header.LGPL3 containing Commercial + LGPLv3 + GPLv2 license
combination
Change-Id: I6f49b819a8a20cc4f88b794a8f6726d975e8ffbe
Reviewed-by: Matti Paaso <matti.paaso@theqtcompany.com>
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This shotgun-surgery approach is motivated by trying to get a
clean(er) build for -Wnoexcept on GCC, so it is expected that
for any class touched here, there will be more operations that
can be marked nothrow. But they don't show up in conditional
noexcept clauses, yet, so they are deferred to some later
commit.
Change-Id: I0eb10d75a26c361fb22cf785399e83b434bdf233
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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This is present in QList already and its lack is a nuisance when
switching from QList based code to QVector (which makes sense e.g.
if the item size exceeds sizeof(void*))
Also, albeit operator+=() and operator<<() exist, some people
simply prefer functions with real function names.
[ChangeLog][QtCore][QVector] Added QVector::append(const QVector &) overload
Change-Id: I9aae8223b086765625f2f3071fab5da0780f8a43
Reviewed-by: Liang Qi <liang.qi@theqtcompany.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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QArrayData::allocate() uses malloc() which can return 0. We need to
check for that when using it inside other containers. The containers
might otherwise return a seemingly valid result from some allocating
operation which is actually corrupt.
Task-number: QTBUG-41231
Change-Id: I16cc6035e4f495f519bd38bf29cee080ee0637f6
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
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...by implementing it via std::equal().
This might also enable STL implementations to choose a
hand-optimized version of the algorithm for C++ builtin types.
Change-Id: I1347a7f365b3d2947f19a81b95aa8d89b8ad303d
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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...by implementing it via std::find().
This might also enable STL implementations to choose a
hand-optimized version of the algorithm for C++ builtin types.
Change-Id: I86e94d63ff58332f2fa6eafb3c1baccd125a6f34
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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After much head-scratching, we found no reason for the backwards iteration.
Indeed, forward iteration should be slightly faster than backwards, because
it operates in the direction in which cache-lines are filled, usually.
This is in preparation of using std algorithms instead of hand-written
loops. It avoids having to use std::reverse_iterator.
Change-Id: Id2388eab2339c24deb93095495d87056a9c57133
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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After much head-scratching, we found no reason for the backwards iteration.
Indeed, forward iteration should be slightly faster than backwards, because
it operates in the direction in which cache-lines are filled, usually.
This is in preparation of using std algorithms instead of hand-written
loops. It avoids having to use std::reverse_iterator.
Change-Id: I180c52e0bb90e823216b77d3f49f2a3fd395567d
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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- Renamed LICENSE.LGPL to LICENSE.LGPLv21
- Added LICENSE.LGPLv3
- Removed LICENSE.GPL
Change-Id: Iec3406e3eb3f133be549092015cefe33d259a3f2
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
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...by instantiating std::count() not with QVector::const_iterator, which is a
class, but with const T*, thus increasing the chance that the instantiation
can be shared with other instantiations in the executable. It might also enable
STL implementations to choose a hand-optimized version of the algorithm for C++
builtin types.
Change-Id: I93df4e58f76838d98b565f229c19e317774b7b4c
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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Assuming the CPU has already loaded 'this', the value of 'd' is just
an indirect load away. The value of d->size, however, is two indirect
loads away, one of which is the load of 'd'.
So it makes more sense to check for d-pointer equality first, as that
can proceed in parallel with the fetch for d->size, which the CPU
may speculatively trigger.
In addition, at least GCC in release mode after this change doesn't
set up the stack frame if the d-pointer check succeeds.
Change-Id: I61f9b245070dd1742fca6ccb8d4936a0b1aa7c07
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
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There are three reasons to do so:
1. This could be more efficient, depending on the STL implementation.
2. By using QTypedArrayData iterators (T*) instead of QVector ones,
we actually invoke the non-templated range ctor of std::vector,
at least in the common case that std::vector<T>::const_iterator
is also const T*.
3. The change turns a former NRVO return into a RVO one, potentially
allowing more compilers to perform the copy elision.
Change-Id: I70b35aaeae70ba06a971a36b8b1b1da997e8094f
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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There is no need for a custom algorithm as we can use
std::count
Change-Id: Id1ab514c7cd8f52efe49b27712121415d7ca4455
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
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Change-Id: Iff7d9ec85a095c6712e6045e7708bb88eac629e1
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
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Up to now, Qt had at least 3 different implementations of the mid().
Only QString::mid implementation was not crashing on edge cases and
was protected against overflows, therefore I picked that one as the
base implementation, even if it has weird semantics for an invalid
input.
As a side effect QVector::mid was slightly optimized to not detach in
all cases (which follows current QList behavior). Documentation of
QVector::mid and QList::mid was updated to not mention "copy of data"
which could suggest that the mid() result is detached.
QStringRef::mid was fixed and now it follows general Qt behavior, by
returning a null value for a null input.
Change-Id: Ie9ff5d98372bd193d66508e6dd92b6ed1180ad9b
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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