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29 lines
913 B
C++
29 lines
913 B
C++
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/*=============================================================================
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Copyright (c) 2011-2013 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_UTILITY_EXCAHNGE_HPP
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#define SPROUT_UTILITY_EXCAHNGE_HPP
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#include <sprout/config.hpp>
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#include <sprout/utility/forward.hpp>
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#include <sprout/utility/move.hpp>
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namespace sprout {
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//
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// 20.2.3 exchange
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//
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template<typename T, typename U = T>
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inline SPROUT_CXX14_CONSTEXPR T
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exchange(T& obj, U&& new_val) {
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T old_val = sprout::move(obj);
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obj = sprout::forward<U>(new_val);
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return old_val;
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_UTILITY_EXCAHNGE_HPP
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