Revision control
++ // Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Sérgio Martins <sergio.martins@kdab.com>
++ // Copyright (C) 2019 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++ // Qt-Security score:significant reason:default
++
++ #ifndef QSCOPEGUARD_H
++ #define QSCOPEGUARD_H
++
++ #include <QtCore/qassert.h>
++ #include <QtCore/qtclasshelpermacros.h>
++ #include <QtCore/qcompilerdetection.h>
++ #include <QtCore/qtconfigmacros.h>
++
++ #include <type_traits>
++ #include <utility>
++
++ class tst_QScopeGuard;
++
++ QT_BEGIN_NAMESPACE
++
++ template <typename F>
++ class QScopeGuard
++ {
++ public:
++ Q_NODISCARD_CTOR
++ explicit QScopeGuard(F &&f) noexcept
++ : m_func(std::move(f))
++ {
++ }
++
++ Q_NODISCARD_CTOR
++ explicit QScopeGuard(const F &f) noexcept
++ : m_func(f)
++ {
++ }
++
++ Q_NODISCARD_CTOR
++ QScopeGuard(QScopeGuard &&other) noexcept
++ : m_func(std::move(other.m_func))
++ , m_invoke(std::exchange(other.m_invoke, false))
++ {
++ }
++
++ ~QScopeGuard() noexcept
++ {
++ if (m_invoke)
++ m_func();
++ }
++
++ void dismiss() noexcept
++ {
++ m_invoke = false;
++ }
++
++ void commit() noexcept(std::is_nothrow_invocable_v<F>)
++ {
++ Q_ASSERT(m_invoke);
++ m_invoke = false; // do it before we may throw from calling m_func()
++ m_func();
++ }
++
++ private:
++ Q_DISABLE_COPY(QScopeGuard)
++ friend class ::tst_QScopeGuard;
++
++ F m_func;
++ bool m_invoke = true;
++ };
++
++ template <typename F> QScopeGuard(F(&)()) -> QScopeGuard<F(*)()>;
++
++ //! [qScopeGuard]
++ template <typename F>
++ [[nodiscard]] QScopeGuard<typename std::decay<F>::type> qScopeGuard(F &&f)
++ {
++ return QScopeGuard<typename std::decay<F>::type>(std::forward<F>(f));
++ }
++
++ QT_END_NAMESPACE
++
++ #endif // QSCOPEGUARD_H