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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Copyright (C) 2016 Intel Corporation.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QSTRINGLITERAL_H
#define QSTRINGLITERAL_H
#include <QtCore/qarraydata.h>
#if 0
#pragma qt_class(QStringLiteral)
#endif
QT_BEGIN_NAMESPACE
typedef QTypedArrayData<ushort> QStringData;
#if defined(Q_OS_WIN) && !defined(Q_COMPILER_UNICODE_STRINGS)
// fall back to wchar_t if the a Windows compiler does not
// support Unicode string literals, assuming wchar_t is 2 bytes
// on that platform (sanity-checked by static_assert further below)
#if defined(Q_CC_MSVC)
# define QT_UNICODE_LITERAL_II(str) L##str
#else
# define QT_UNICODE_LITERAL_II(str) L"" str
#endif
typedef wchar_t qunicodechar;
#else
// all our supported compilers support Unicode string literals,
// even if their Q_COMPILER_UNICODE_STRING has been revoked due
// to lacking stdlib support. But QStringLiteral only needs the
// core language feature, so just use u"" here unconditionally:
#define QT_UNICODE_LITERAL_II(str) u"" str
typedef char16_t qunicodechar;
#endif
Q_STATIC_ASSERT_X(sizeof(qunicodechar) == 2,
"qunicodechar must typedef an integral type of size 2");
#define QT_UNICODE_LITERAL(str) QT_UNICODE_LITERAL_II(str)
#define QStringLiteral(str) \
([]() Q_DECL_NOEXCEPT -> QString { \
enum { Size = sizeof(QT_UNICODE_LITERAL(str))/2 - 1 }; \
static const QStaticStringData<Size> qstring_literal = { \
Q_STATIC_STRING_DATA_HEADER_INITIALIZER(Size), \
QT_UNICODE_LITERAL(str) }; \
QStringDataPtr holder = { qstring_literal.data_ptr() }; \
const QString qstring_literal_temp(holder); \
return qstring_literal_temp; \
}()) \
/**/
#define Q_STATIC_STRING_DATA_HEADER_INITIALIZER_WITH_OFFSET(size, offset) \
{ Q_REFCOUNT_INITIALIZE_STATIC, size, 0, 0, offset } \
/**/
#define Q_STATIC_STRING_DATA_HEADER_INITIALIZER(size) \
Q_STATIC_STRING_DATA_HEADER_INITIALIZER_WITH_OFFSET(size, sizeof(QStringData)) \
/**/
#ifndef QT_NO_UNICODE_LITERAL
# ifndef QT_UNICODE_LITERAL
# error "If you change QStringLiteral, please change QStringViewLiteral, too"
# endif
# define QStringViewLiteral(str) QStringView(QT_UNICODE_LITERAL(str))
#endif
template <int N>
struct QStaticStringData
{
QArrayData str;
qunicodechar data[N + 1];
QStringData *data_ptr() const
{
Q_ASSERT(str.ref.isStatic());
return const_cast<QStringData *>(static_cast<const QStringData*>(&str));
}
};
struct QStringDataPtr
{
QStringData *ptr;
};
QT_END_NAMESPACE
#endif // QSTRINGLITERAL_H
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