| 1 | // -*- C++ -*- |
|---|---|
| 2 | //===----------------------------------------------------------------------===// |
| 3 | // |
| 4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 5 | // See https://llvm.org/LICENSE.txt for license information. |
| 6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #ifndef _LIBCPP___UTILITY_MOVE_H |
| 11 | #define _LIBCPP___UTILITY_MOVE_H |
| 12 | |
| 13 | #include <__config> |
| 14 | #include <type_traits> |
| 15 | |
| 16 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 17 | # pragma GCC system_header |
| 18 | #endif |
| 19 | |
| 20 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 21 | |
| 22 | template <class _Tp> |
| 23 | _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR typename remove_reference<_Tp>::type&& |
| 24 | move(_Tp&& __t) _NOEXCEPT { |
| 25 | typedef _LIBCPP_NODEBUG typename remove_reference<_Tp>::type _Up; |
| 26 | return static_cast<_Up&&>(__t); |
| 27 | } |
| 28 | |
| 29 | template <class _Tp> |
| 30 | using __move_if_noexcept_result_t = |
| 31 | typename conditional<!is_nothrow_move_constructible<_Tp>::value && is_copy_constructible<_Tp>::value, const _Tp&, |
| 32 | _Tp&&>::type; |
| 33 | |
| 34 | template <class _Tp> |
| 35 | _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 __move_if_noexcept_result_t<_Tp> |
| 36 | move_if_noexcept(_Tp& __x) _NOEXCEPT { |
| 37 | return _VSTD::move(__x); |
| 38 | } |
| 39 | |
| 40 | _LIBCPP_END_NAMESPACE_STD |
| 41 | |
| 42 | #endif // _LIBCPP___UTILITY_MOVE_H |
| 43 |