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55 lines
1.1 KiB
55 lines
1.1 KiB
/////////////////////////////////////////////////////////////////////////////// |
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// save_restore.hpp |
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// |
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// Copyright 2008 Eric Niebler. Distributed under the Boost |
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// Software License, Version 1.0. (See accompanying file |
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef BOOST_XPRESSIVE_DETAIL_UTILITY_SAVE_RESTORE_HPP_EAN_10_04_2005 |
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#define BOOST_XPRESSIVE_DETAIL_UTILITY_SAVE_RESTORE_HPP_EAN_10_04_2005 |
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// MS compatible compilers support #pragma once |
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#if defined(_MSC_VER) && (_MSC_VER >= 1020) |
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# pragma once |
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#endif |
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#include <boost/noncopyable.hpp> |
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namespace boost { namespace xpressive { namespace detail |
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{ |
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template<typename T> |
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struct save_restore |
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: private noncopyable |
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{ |
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explicit save_restore(T &t) |
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: ref(t) |
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, val(t) |
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{ |
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} |
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save_restore(T &t, T const &n) |
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: ref(t) |
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, val(t) |
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{ |
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this->ref = n; |
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} |
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~save_restore() |
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{ |
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this->ref = this->val; |
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} |
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void restore() |
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{ |
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this->ref = this->val; |
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} |
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private: |
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T &ref; |
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T const val; |
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}; |
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}}} |
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#endif
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