176d0caaeSpatrick // -*- C++ -*- 276d0caaeSpatrick //===----------------------------------------------------------------------===// 376d0caaeSpatrick // 476d0caaeSpatrick // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 576d0caaeSpatrick // See https://llvm.org/LICENSE.txt for license information. 676d0caaeSpatrick // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 776d0caaeSpatrick // 876d0caaeSpatrick //===----------------------------------------------------------------------===// 976d0caaeSpatrick 1076d0caaeSpatrick #ifndef _LIBCPP___UTILITY_MOVE_H 1176d0caaeSpatrick #define _LIBCPP___UTILITY_MOVE_H 1276d0caaeSpatrick 1376d0caaeSpatrick #include <__config> 14*4bdff4beSrobert #include <__type_traits/conditional.h> 15*4bdff4beSrobert #include <__type_traits/is_copy_constructible.h> 16*4bdff4beSrobert #include <__type_traits/is_nothrow_move_constructible.h> 17*4bdff4beSrobert #include <__type_traits/remove_reference.h> 1876d0caaeSpatrick 1976d0caaeSpatrick #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 2076d0caaeSpatrick # pragma GCC system_header 2176d0caaeSpatrick #endif 2276d0caaeSpatrick 2376d0caaeSpatrick _LIBCPP_BEGIN_NAMESPACE_STD 2476d0caaeSpatrick 2576d0caaeSpatrick template <class _Tp> 26*4bdff4beSrobert _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR __libcpp_remove_reference_t<_Tp>&& move(_LIBCPP_LIFETIMEBOUND _Tp && __t)27*4bdff4beSrobertmove(_LIBCPP_LIFETIMEBOUND _Tp&& __t) _NOEXCEPT { 28*4bdff4beSrobert typedef _LIBCPP_NODEBUG __libcpp_remove_reference_t<_Tp> _Up; 2976d0caaeSpatrick return static_cast<_Up&&>(__t); 3076d0caaeSpatrick } 3176d0caaeSpatrick 3276d0caaeSpatrick template <class _Tp> 3376d0caaeSpatrick using __move_if_noexcept_result_t = 34*4bdff4beSrobert __conditional_t<!is_nothrow_move_constructible<_Tp>::value && is_copy_constructible<_Tp>::value, const _Tp&, _Tp&&>; 3576d0caaeSpatrick 3676d0caaeSpatrick template <class _Tp> 37*4bdff4beSrobert _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __move_if_noexcept_result_t<_Tp> move_if_noexcept(_LIBCPP_LIFETIMEBOUND _Tp & __x)38*4bdff4beSrobertmove_if_noexcept(_LIBCPP_LIFETIMEBOUND _Tp& __x) _NOEXCEPT { 39*4bdff4beSrobert return std::move(__x); 4076d0caaeSpatrick } 4176d0caaeSpatrick 4276d0caaeSpatrick _LIBCPP_END_NAMESPACE_STD 4376d0caaeSpatrick 4476d0caaeSpatrick #endif // _LIBCPP___UTILITY_MOVE_H 45