109 lines
3.7 KiB
C++
109 lines
3.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Copyright (C) 2016 Intel Corporation.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QSTRINGLITERAL_H
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#define QSTRINGLITERAL_H
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#include <QtCore/qarraydata.h>
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#if 0
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#pragma qt_class(QStringLiteral)
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#endif
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QT_BEGIN_NAMESPACE
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typedef QTypedArrayData<ushort> QStringData;
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// all our supported compilers support Unicode string literals,
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// even if their Q_COMPILER_UNICODE_STRING has been revoked due
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// to lacking stdlib support. But QStringLiteral only needs the
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// core language feature, so just use u"" here unconditionally:
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typedef char16_t qunicodechar;
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Q_STATIC_ASSERT_X(sizeof(qunicodechar) == 2,
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"qunicodechar must typedef an integral type of size 2");
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#define QT_UNICODE_LITERAL(str) u"" str
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#define QStringLiteral(str) \
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([]() noexcept -> QString { \
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enum { Size = sizeof(QT_UNICODE_LITERAL(str))/2 - 1 }; \
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static const QStaticStringData<Size> qstring_literal = { \
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Q_STATIC_STRING_DATA_HEADER_INITIALIZER(Size), \
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QT_UNICODE_LITERAL(str) }; \
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QStringDataPtr holder = { qstring_literal.data_ptr() }; \
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return QString(holder); \
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}()) \
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/**/
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#define Q_STATIC_STRING_DATA_HEADER_INITIALIZER_WITH_OFFSET(size, offset) \
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{ Q_REFCOUNT_INITIALIZE_STATIC, size, 0, 0, offset } \
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/**/
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#define Q_STATIC_STRING_DATA_HEADER_INITIALIZER(size) \
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Q_STATIC_STRING_DATA_HEADER_INITIALIZER_WITH_OFFSET(size, sizeof(QStringData)) \
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/**/
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#if QT_DEPRECATED_SINCE(5, 14)
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# define QStringViewLiteral(str) QStringView(QT_UNICODE_LITERAL(str), QtPrivate::Deprecated)
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#endif
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template <int N>
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struct QStaticStringData
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{
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QArrayData str;
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qunicodechar data[N + 1];
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QStringData *data_ptr() const
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{
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Q_ASSERT(str.ref.isStatic());
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return const_cast<QStringData *>(static_cast<const QStringData*>(&str));
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}
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};
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struct QStringDataPtr
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{
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QStringData *ptr;
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};
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QT_END_NAMESPACE
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#endif // QSTRINGLITERAL_H
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