| template<typename...> |
| struct __and_; |
| |
| template<typename _Pp> |
| struct __not_; |
| |
| template<typename _Tp> |
| struct is_move_constructible; |
| |
| template<typename _Tp> |
| struct is_nothrow_move_constructible; |
| |
| template<typename _Tp> |
| struct is_move_assignable; |
| |
| template<typename _Tp> |
| struct is_nothrow_move_assignable; |
| |
| template<typename _Tp> |
| struct remove_reference; |
| |
| template<bool, typename _Tp = void> |
| struct enable_if; |
| |
| template<bool _Cond, typename _Tp = void> |
| using __enable_if_t = typename enable_if<_Cond, _Tp>::type; |
| |
| template<typename... _Cond> |
| using _Require = __enable_if_t<__and_<_Cond...>::value>; |
| |
| template<typename _Tp> |
| struct __is_tuple_like; |
| |
| template<typename _Tp> |
| constexpr inline |
| _Require<__not_<__is_tuple_like<_Tp>>, |
| is_move_constructible<_Tp>, |
| is_move_assignable<_Tp>> |
| swap(_Tp&, _Tp&) |
| noexcept(__and_<is_nothrow_move_constructible<_Tp>, |
| is_nothrow_move_assignable<_Tp>>::value); |
