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File indexing completed on 2026-09-14 09:18:30
0001 // Copyright (C) 2021 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Marc Mutz <marc.mutz@kdab.com> 0002 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only 0003 // Qt-Security score:significant reason:default 0004 #ifndef Q20FUNCTIONAL_H 0005 #define Q20FUNCTIONAL_H 0006 0007 #include <QtCore/qglobal.h> 0008 0009 #include <functional> 0010 0011 // 0012 // W A R N I N G 0013 // ------------- 0014 // 0015 // This file is not part of the Qt API. Types and functions defined in this 0016 // file can reliably be replaced by their std counterparts, once available. 0017 // You may use these definitions in your own code, but be aware that we 0018 // will remove them once Qt depends on the C++ version that supports 0019 // them in namespace std. There will be NO deprecation warning, the 0020 // definitions will JUST go away. 0021 // 0022 // If you can't agree to these terms, don't use these definitions! 0023 // 0024 // We mean it. 0025 // 0026 0027 #include <functional> 0028 0029 QT_BEGIN_NAMESPACE 0030 0031 namespace q20 { 0032 // like std::identity 0033 #ifdef __cpp_lib_ranges 0034 using std::identity; 0035 #else 0036 struct identity 0037 { 0038 struct is_transparent {}; 0039 template <typename T> 0040 constexpr T &&operator()(T&& t) const noexcept { return std::forward<T>(t); } 0041 }; 0042 #endif // __cpp_lib_ranges 0043 } // namespace q20 0044 0045 QT_END_NAMESPACE 0046 0047 #endif /* Q20FUNCTIONAL_H */
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