105 lines
2.4 KiB
C++
105 lines
2.4 KiB
C++
/*
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SPDX-FileCopyrightText: 2017 Kevin Funk <kfunk@.kde.org>
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SPDX-License-Identifier: LGPL-2.0-or-later
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*/
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#ifndef KDEVELOP_QTCOMPAT_P_H
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#define KDEVELOP_QTCOMPAT_P_H
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#include <qglobal.h>
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#include <QDir>
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#if QT_VERSION < QT_VERSION_CHECK(5,7,0)
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namespace QtPrivate
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{
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template <typename T> struct QAddConst {
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typedef const T Type;
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};
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}
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// this adds const to non-const objects (like std::as_const)
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template <typename T>
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Q_DECL_CONSTEXPR typename QtPrivate::QAddConst<T>::Type &qAsConst(T &t) Q_DECL_NOTHROW { return t; }
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// prevent rvalue arguments:
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template <typename T>
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void qAsConst(const T &&) Q_DECL_EQ_DELETE;
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#endif
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#if QT_VERSION < QT_VERSION_CHECK(5,7,0)
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template<typename...Args>
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struct QNonConstOverload
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{
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template<typename R, typename T>
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static constexpr auto of(R (T::*func)(Args...)) noexcept -> decltype(func)
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{
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return func;
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}
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};
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template<typename...Args>
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struct QConstOverload
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{
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template<typename R, typename T>
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static constexpr auto of(R (T::*func)(Args...) const) noexcept -> decltype(func)
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{
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return func;
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}
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};
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template<typename...Args>
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struct QOverload : QConstOverload<Args...>, QNonConstOverload<Args...>
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{
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using QConstOverload<Args...>::of;
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using QNonConstOverload<Args...>::of;
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template<typename R>
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static constexpr auto of(R (*func)(Args...)) noexcept -> decltype(func)
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{
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return func;
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}
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};
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#endif
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// compat for Q_FALLTHROUGH
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#if QT_VERSION < QT_VERSION_CHECK(5,8,0)
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#if defined(__has_cpp_attribute)
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# if __has_cpp_attribute(fallthrough)
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# define Q_FALLTHROUGH() [[fallthrough]]
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# elif __has_cpp_attribute(clang::fallthrough)
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# define Q_FALLTHROUGH() [[clang::fallthrough]]
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# elif __has_cpp_attribute(gnu::fallthrough)
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# define Q_FALLTHROUGH() [[gnu::fallthrough]]
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# endif
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#endif
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#ifndef Q_FALLTHROUGH
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# if defined(__GNUC__) && !defined(__INTEL_COMPILER) && (((__GNUC__ * 100) + __GNUC_MINOR__) >= 700)
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# define Q_FALLTHROUGH() __attribute__((fallthrough))
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# else
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# define Q_FALLTHROUGH() (void)0
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# endif
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#endif
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#endif
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namespace QtCompat {
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// TODO: Just use QDir::listSeparator once we depend on Qt 5.6
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Q_DECL_CONSTEXPR inline QChar listSeparator() Q_DECL_NOTHROW
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{
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#if QT_VERSION < QT_VERSION_CHECK(5,6,0)
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#ifdef Q_OS_WIN
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return QLatin1Char(';');
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#else
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return QLatin1Char(':');
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#endif
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#else
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return QDir::listSeparator();
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#endif
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}
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}
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#endif
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