1// Copyright (C) 2016 The Qt Company Ltd.
2// Copyright (C) 2020 Intel Corporation.
3// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
4
5#ifndef QSTRINGLITERAL_H
6#define QSTRINGLITERAL_H
7
8#include <QtCore/qarraydata.h>
9#include <QtCore/qarraydatapointer.h>
10
11#if 0
12#pragma qt_class(QStringLiteral)
13#endif
14
15QT_BEGIN_NAMESPACE
16
17// all our supported compilers support Unicode string literals,
18// even if their Q_COMPILER_UNICODE_STRING has been revoked due
19// to lacking stdlib support. But QStringLiteral only needs the
20// core language feature, so just use u"" here unconditionally:
21
22#define QT_UNICODE_LITERAL(str) u"" str
23
24using QStringPrivate = QArrayDataPointer<char16_t>;
25
26namespace QtPrivate {
27template <qsizetype N>
28static Q_ALWAYS_INLINE QStringPrivate qMakeStringPrivate(const char16_t (&literal)[N])
29{
30 // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
31 auto str = const_cast<char16_t *>(literal);
32 return { nullptr, str, N - 1 };
33}
34}
35
36#define QStringLiteral(str) \
37 (QString(QtPrivate::qMakeStringPrivate(QT_UNICODE_LITERAL(str)))) \
38 /**/
39
40
41QT_END_NAMESPACE
42
43#endif // QSTRINGLITERAL_H
44

source code of qtbase/src/corelib/text/qstringliteral.h