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40
41#ifndef QSTRINGLITERAL_H
42#define QSTRINGLITERAL_H
43
44#include <QtCore/qarraydata.h>
45#include <QtCore/qarraydatapointer.h>
46
47#if 0
48#pragma qt_class(QStringLiteral)
49#endif
50
51QT_BEGIN_NAMESPACE
52
53// all our supported compilers support Unicode string literals,
54// even if their Q_COMPILER_UNICODE_STRING has been revoked due
55// to lacking stdlib support. But QStringLiteral only needs the
56// core language feature, so just use u"" here unconditionally:
57
58#define QT_UNICODE_LITERAL(str) u"" str
59
60using QStringPrivate = QArrayDataPointer<char16_t>;
61
62namespace QtPrivate {
63template <qsizetype N>
64static Q_ALWAYS_INLINE QStringPrivate qMakeStringPrivate(const char16_t (&literal)[N])
65{
66 // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
67 auto str = const_cast<char16_t *>(literal);
68 return { nullptr, str, N - 1 };
69}
70}
71
72#define QStringLiteral(str) \
73 (QString(QtPrivate::qMakeStringPrivate(QT_UNICODE_LITERAL(str)))) \
74 /**/
75
76
77QT_END_NAMESPACE
78
79#endif // QSTRINGLITERAL_H
80

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