forked from qt-creator/qt-creator
68 lines
2.2 KiB
C
68 lines
2.2 KiB
C
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/****************************************************************************
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**
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** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of Qt Creator.
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**
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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****************************************************************************/
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#ifndef SCOPEDSWAP_H
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#define SCOPEDSWAP_H
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#if !(__cplusplus > 199711L || __GXX_EXPERIMENTAL_CXX0X__ || _MSC_VER >= 1600 || defined( _LIBCPP_VERSION )) || \
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(defined(__GNUC_LIBSTD__) && ((__GNUC_LIBSTD__-0) * 100 + __GNUC_LIBSTD_MINOR__-0 <= 402))
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# include <algorithm>
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#else // C++11
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# include <utility>
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#endif
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namespace Utils {
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/// RAII object to save a value, and restore it when the scope is left.
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template<typename T>
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class ScopedSwap
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{
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T oldValue;
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T &ref;
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public:
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ScopedSwap(T &var, T newValue)
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: oldValue(newValue)
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, ref(var)
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{
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std::swap(ref, oldValue);
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}
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~ScopedSwap()
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{
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std::swap(ref, oldValue);
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}
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};
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typedef ScopedSwap<bool> ScopedBoolSwap;
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} // Utils namespace
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#endif // SCOPEDSWAP_H
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