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| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Copyright (C) 2016 Intel Corporation. |
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| ****************************************************************************/ |
| |
| #ifndef QSTRINGLITERAL_H |
| #define QSTRINGLITERAL_H |
| |
| #include <QtCore/qarraydata.h> |
| |
| #if 0 |
| #pragma qt_class(QStringLiteral) |
| #endif |
| |
| QT_BEGIN_NAMESPACE |
| |
| typedef QTypedArrayData<ushort> QStringData; |
| |
| // 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| // even if their Q_COMPILER_UNICODE_STRING has been revoked due |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: |
| |
| typedef char16_t qunicodechar; |
| |
| Q_STATIC_ASSERT_X(sizeof(qunicodechar) == 2, |
| "qunicodechar must typedef an integral type of size 2"); |
| |
| #define QT_UNICODE_LITERAL(str) u"" str |
| #define QStringLiteral(str) \ |
| ([]() 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() }; \ |
| return QString(holder); \ |
| }()) \ |
| /**/ |
| |
| #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)) \ |
| /**/ |
| |
| #if QT_DEPRECATED_SINCE(5, 14) |
| # define QStringViewLiteral(str) QStringView(QT_UNICODE_LITERAL(str), QtPrivate::Deprecated) |
| #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 |