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fix swap

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bolero-MURAKAMI 2013-12-03 00:57:57 +09:00
parent 4f5c2787d7
commit 18b388c89f
1 changed files with 13 additions and 3 deletions
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16
sprout/utility/swap.hpp
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@ -10,12 +10,22 @@
#include <cstddef> #include <cstddef>
#include <utility> #include <utility>
#include <type_traits>
#include <sprout/config.hpp> #include <sprout/config.hpp>
#include <sprout/utility/move.hpp>
#include <sprout/type_traits/enabler_if.hpp>
namespace sprout_swap_detail { namespace sprout_swap_detail {
using std::swap; using std::swap;
template<typename T> template<typename T, typename sprout::enabler_if<std::is_scalar<T>::value>::type = sprout::enabler>
inline SPROUT_CXX14_CONSTEXPR void
swap_impl(T& a, T& b) SPROUT_NOEXCEPT {
T temp = sprout::move(a);
a = sprout::move(b);
b = sprout::move(temp);
}
template<typename T, typename sprout::enabler_if<!std::is_scalar<T>::value>::type = sprout::enabler>
inline SPROUT_CXX14_CONSTEXPR void inline SPROUT_CXX14_CONSTEXPR void
swap_impl(T& a, T& b) swap_impl(T& a, T& b)
SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(swap(a, b))) SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(swap(a, b)))
@ -25,10 +35,10 @@ namespace sprout_swap_detail {
template<typename T, std::size_t N> template<typename T, std::size_t N>
inline SPROUT_CXX14_CONSTEXPR void inline SPROUT_CXX14_CONSTEXPR void
swap_impl(T (& a)[N], T (& b)[N]) swap_impl(T (& a)[N], T (& b)[N])
SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(swap(*a, *b))) SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(sprout_swap_detail::swap_impl(*a, *b)))
{ {
for (std::size_t i = 0; i < N; ++i) { for (std::size_t i = 0; i < N; ++i) {
swap(a[i], b[i]); sprout_swap_detail::swap_impl(a[i], b[i]);
} }
} }
} // namespace sprout_swap_detail } // namespace sprout_swap_detail