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author | Jason Barron <jbarron@trolltech.com> | 2009-06-25 13:49:53 (GMT) |
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committer | Jason Barron <jbarron@trolltech.com> | 2009-06-25 13:49:53 (GMT) |
commit | db8f05e257019694f5e8076845626008f2adc3dd (patch) | |
tree | 05d3959403cf15ac5f702091439e028af01f343b /src/corelib/tools/qstringbuilder.cpp | |
parent | 8aafaa65a1d16f8b982279f5aceedf1e281ddb5a (diff) | |
parent | 796a5a2c7d8c91a46ac761dde18b7da2ec6c177b (diff) | |
download | Qt-db8f05e257019694f5e8076845626008f2adc3dd.zip Qt-db8f05e257019694f5e8076845626008f2adc3dd.tar.gz Qt-db8f05e257019694f5e8076845626008f2adc3dd.tar.bz2 |
Merge commit 'qt/master-stable' into 4.6-stable
Bring Qt 4.6 into the Qt-S60 repo.
Conflicts:
configure.exe
mkspecs/features/qttest_p4.prf
qmake/generators/makefile.cpp
src/corelib/io/qdir.cpp
src/corelib/io/qprocess.h
src/corelib/kernel/qcoreevent.h
src/corelib/kernel/qobject.cpp
src/corelib/kernel/qsharedmemory_unix.cpp
src/corelib/thread/qthread_p.h
src/corelib/tools/qvector.h
src/gui/dialogs/qdialog.cpp
src/gui/dialogs/qfiledialog.cpp
src/gui/dialogs/qfiledialog_p.h
src/gui/dialogs/qmessagebox.cpp
src/gui/graphicsview/qgraphicsitem.cpp
src/gui/graphicsview/qgraphicsview.cpp
src/gui/image/qpixmapcache.cpp
src/gui/kernel/qapplication.cpp
src/gui/kernel/qapplication_p.h
src/gui/kernel/qwidget.cpp
src/gui/kernel/qwidget_p.h
src/gui/painting/qdrawhelper.cpp
src/gui/painting/qpaintengine_raster.cpp
src/gui/text/qfontengine_qpf.cpp
src/gui/widgets/qmenubar.cpp
src/network/socket/qlocalserver.cpp
src/testlib/qtestcase.cpp
src/testlib/testlib.pro
tests/auto/qimagereader/tst_qimagereader.cpp
tests/auto/qitemdelegate/tst_qitemdelegate.cpp
tests/auto/qnetworkreply/tst_qnetworkreply.cpp
tests/auto/qpixmap/qpixmap.pro
Diffstat (limited to 'src/corelib/tools/qstringbuilder.cpp')
-rw-r--r-- | src/corelib/tools/qstringbuilder.cpp | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/src/corelib/tools/qstringbuilder.cpp b/src/corelib/tools/qstringbuilder.cpp new file mode 100644 index 0000000..366a07b --- /dev/null +++ b/src/corelib/tools/qstringbuilder.cpp @@ -0,0 +1,135 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qstringbuilder.h" + +/*! + \class QLatin1Literal + \reentrant + \since 4.6 + + \brief The QLatin1Literal class provides a thin wrapper around string + literals used in source code. + + \ingroup tools + \ingroup shared + \ingroup text + \mainclass + + Unlike \c QLatin1String, a \c QLatin1Literal can retrieve its size + without iterating over the literal. + + The main use of \c QLatin1Literal is in conjunction with \c QStringBuilder + to reduce the number of reallocations needed to build up a string from + smaller chunks. + + \sa QStringBuilder, QLatin1String, QString, QStringRef +*/ + +/*! \fn int QLatin1Literal::size() const + + Returns the number of characters in the literal \e{excluding} the trailing + NULL char. +*/ + +/*! \fn QLatin1Literal::QLatin1Literal(const char(&string)[N]) + + Constructs a new literal from the given \a string. +*/ + +/*! \fn char *QLatin1Literal::data() const + + Returns a pointer to the first character of the string literal. + The string literal is terminated by a NUL character. +*/ + +/*! \fn QLatin1Literal::operator QString() const + + Converts the \c QLatin1Literal into a \c QString object. +*/ + + + +/*! + \class QStringBuilder + \reentrant + \since 4.6 + + \brief The QStringBuilder class is a template class that provides a facility to build + up QStrings from smaller chunks. + + \ingroup tools + \ingroup shared + \ingroup text + \mainclass + + When creating strings from smaller chunks, typically \c QString::operator+() + is used, resulting in \e{n - 1} reallocations when operating on \e{n} chunks. + + QStringBuilder uses expression templates to collect the individual parts, + compute the total size, allocate memory for the resulting QString object, + and copy the contents of the chunks into the result. + + The QStringBuilder class is not to be used explicitly in user code. + Instances of the class are created as return values of the operator%() + function, acting on objects of type \c QString, \c QLatin1String, + \c QLatin1Literal, \c \QStringRef, \c QChar, \c QCharRef, + \c QLatin1Char, and \c char. + + Concatenating strings with operator%() generally yields better + performance then using \c QString::operator+() on the same chunks + if there are three or more of them, and performs equally well in other + cases. + + \sa QLatin1Literal, QString +*/ + +/* \fn template <class A, class B> QStringBuilder<A, B> operator%(const A &a, const B &b) + + Returns a \c QStringBuilder object that is converted to a QString object + when assigned to a variable of QString type or passed to a function that + takes a QString parameter. + + This function is usable with arguments of type \c QString, + \c QLatin1String, \c QLatin1Literal, \c QStringRef, + \c QChar, \c QCharRef, \c QLatin1Char, and \c char. +*/ + |