mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2016 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_SWAP_HPP
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#define SPROUT_UTILITY_SWAP_HPP
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#include <utility>
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/workaround/std/cstddef.hpp>
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#include <sprout/utility/move.hpp>
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#include <sprout/type_traits/enabler_if.hpp>
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namespace sprout_swap_detail {
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using std::swap;
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template<typename T, typename sprout::enabler_if<std::is_scalar<T>::value>::type = sprout::enabler>
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inline SPROUT_CXX14_CONSTEXPR void
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swap_impl(T& a, T& b) SPROUT_NOEXCEPT {
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T temp = sprout::move(a);
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a = sprout::move(b);
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b = sprout::move(temp);
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}
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template<typename T, typename sprout::enabler_if<!std::is_scalar<T>::value>::type = sprout::enabler>
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inline SPROUT_CXX14_CONSTEXPR void
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swap_impl(T& a, T& b)
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SPROUT_NOEXCEPT_IF_EXPR(swap(a, b))
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{
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swap(a, b);
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}
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template<typename T, std::size_t N>
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inline SPROUT_CXX14_CONSTEXPR void
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swap_impl(T (& a)[N], T (& b)[N])
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SPROUT_NOEXCEPT_IF_EXPR(sprout_swap_detail::swap_impl(*a, *b))
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{
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for (std::size_t i = 0; i < N; ++i) {
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sprout_swap_detail::swap_impl(a[i], b[i]);
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}
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}
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} // namespace sprout_swap_detail
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namespace sprout {
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//
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// 20.2.2 swap
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//
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template<typename T1, typename T2>
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inline SPROUT_CXX14_CONSTEXPR void
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swap(T1& lhs, T2& rhs)
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SPROUT_NOEXCEPT_IF_EXPR(sprout_swap_detail::swap_impl(lhs, rhs))
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{
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return sprout_swap_detail::swap_impl(lhs, rhs);
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_UTILITY_SWAP_HPP
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