/*
 * Copyright (c) 2009-2016, Albertas Vyšniauskas
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
 *     * Neither the name of the software author nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef GPICK_COMMON_SET_ON_SCOPE_END_H_
#define GPICK_COMMON_SET_ON_SCOPE_END_H_
namespace common {
template<typename T> struct SetOnScopeEnd {
	SetOnScopeEnd(T &target, T value):
		m_target(target),
		m_value(value),
		m_canceled(false) {
	}
	SetOnScopeEnd(const SetOnScopeEnd &) = delete;
	SetOnScopeEnd &operator=(const SetOnScopeEnd &) = delete;
	~SetOnScopeEnd() {
		if (!m_canceled)
			m_target = m_value;
	}
	void cancel() {
		m_canceled = true;
	}
private:
	T &m_target;
	T m_value;
	bool m_canceled;
};
}
#endif /* GPICK_COMMON_SET_ON_SCOPE_END_H_ */
