| // -*- C++ -*- |
| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___UTILITY_MOVE_H |
| #define _LIBCPP___UTILITY_MOVE_H |
| |
| #include <__config> |
| #include <type_traits> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Tp> |
| _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR typename remove_reference<_Tp>::type&& |
| move(_Tp&& __t) _NOEXCEPT { |
| typedef _LIBCPP_NODEBUG typename remove_reference<_Tp>::type _Up; |
| return static_cast<_Up&&>(__t); |
| } |
| |
| #ifndef _LIBCPP_CXX03_LANG |
| template <class _Tp> |
| using __move_if_noexcept_result_t = |
| typename conditional<!is_nothrow_move_constructible<_Tp>::value && is_copy_constructible<_Tp>::value, const _Tp&, |
| _Tp&&>::type; |
| #else // _LIBCPP_CXX03_LANG |
| template <class _Tp> |
| using __move_if_noexcept_result_t = const _Tp&; |
| #endif |
| |
| template <class _Tp> |
| _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 __move_if_noexcept_result_t<_Tp> |
| move_if_noexcept(_Tp& __x) _NOEXCEPT { |
| return _VSTD::move(__x); |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___UTILITY_MOVE_H |
