diff options
author | Sérgio Martins <sergio.martins@kdab.com> | 2017-09-24 20:45:09 +0100 |
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committer | Simon Hausmann <simon.hausmann@qt.io> | 2018-07-21 17:47:35 +0000 |
commit | 9229452e574e603aa86fd5adb28da33cf5879db9 (patch) | |
tree | 6cd8f36cb60a438377f07519c3e01cf6aad95ba8 /src/corelib/tools/qscopeguard.qdoc | |
parent | 89bca67499c6316ef63c9d788c5508ce6a79b27c (diff) |
Introduce QScopeGuard
A RAII style class which calls a function at end of scope.
Example usage:
auto cleanup = qScopeGuard([] { <my cleanup code> ; });
[ChangeLog][QtCore] Introduced QScopeGuard.
Task-number: QTBUG-62894
Change-Id: Ife67f5c76255a1fafbae03367263da0bac9a0070
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Diffstat (limited to 'src/corelib/tools/qscopeguard.qdoc')
-rw-r--r-- | src/corelib/tools/qscopeguard.qdoc | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/corelib/tools/qscopeguard.qdoc b/src/corelib/tools/qscopeguard.qdoc new file mode 100644 index 0000000000..7cbc3e9c7b --- /dev/null +++ b/src/corelib/tools/qscopeguard.qdoc @@ -0,0 +1,55 @@ +/**************************************************************************** +** +** Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Sérgio Martins <sergio.martins@kdab.com> +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:FDL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Free Documentation License Usage +** Alternatively, this file may be used under the terms of the GNU Free +** Documentation License version 1.3 as published by the Free Software +** Foundation and appearing in the file included in the packaging of +** this file. Please review the following information to ensure +** the GNU Free Documentation License version 1.3 requirements +** will be met: https://www.gnu.org/licenses/fdl-1.3.html. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qscopeguard.h" + +QT_BEGIN_NAMESPACE + +/*! + \fn const QScopeGuard<F> qScopeGuard(F f) + \inmodule QtCore + \brief The qScopeGuard function can be used to call a function at the end of the scope. + \since 5.12 + \ingroup misc + + QScopeGuard<F> is a class which sole purpose is to run a function F in its destructor. + This is useful for guaranteeing your cleanup code is executed whether the function is exited normally, + exited early by a return statement, or exited by an exception. + + If F is a lambda then you cannot instantiate the template directly, therefore the qScopeGuard() helper + is provided and QScopeGuard<F> is made a private implementation detail. + + Example usage is as follows: + + \snippet code/src_corelib_tools_qscopeguard.cpp 0 + + \note Exceptions are not supported. The callable shouldn't throw when executed, copied or moved. + + \sa QScopedValueRollback +*/ + +QT_END_NAMESPACE |