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add constexpr algorithm C++14 version: move, move_backward, swap_ranges, iter_swap

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bolero-MURAKAMI 2013-10-15 14:01:34 +09:00
parent d5c84b07c9
commit a3427d375f
23 changed files with 430 additions and 47 deletions
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sprout/utility/exchange.hpp Normal file
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/*=============================================================================
Copyright (c) 2011-2013 Bolero MURAKAMI
https://github.com/bolero-MURAKAMI/Sprout
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
=============================================================================*/
#ifndef SPROUT_UTILITY_EXCAHNGE_HPP
#define SPROUT_UTILITY_EXCAHNGE_HPP
#include <sprout/config.hpp>
#include <sprout/utility/forward.hpp>
#include <sprout/utility/move.hpp>
namespace sprout {
//
// 20.2.3 exchange
//
template<typename T, typename U = T>
inline SPROUT_CXX14_CONSTEXPR T
exchange(T& obj, U&& new_val) {
T old_val = sprout::move(obj);
obj = sprout::forward<U>(new_val);
return old_val;
}
} // namespace sprout
#endif // #ifndef SPROUT_UTILITY_EXCAHNGE_HPP