1fe6060f1SDimitry Andric // -*- C++ -*- 2fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 3fe6060f1SDimitry Andric // 4fe6060f1SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5fe6060f1SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 6fe6060f1SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7fe6060f1SDimitry Andric // 8fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 9fe6060f1SDimitry Andric 10fe6060f1SDimitry Andric #ifndef _LIBCPP___UTILITY_MOVE_H 11fe6060f1SDimitry Andric #define _LIBCPP___UTILITY_MOVE_H 12fe6060f1SDimitry Andric 13fe6060f1SDimitry Andric #include <__config> 14bdd1243dSDimitry Andric #include <__type_traits/conditional.h> 15*0fca6ea1SDimitry Andric #include <__type_traits/is_constructible.h> 16*0fca6ea1SDimitry Andric #include <__type_traits/is_nothrow_constructible.h> 17bdd1243dSDimitry Andric #include <__type_traits/remove_reference.h> 18fe6060f1SDimitry Andric 19fe6060f1SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 20fe6060f1SDimitry Andric # pragma GCC system_header 21fe6060f1SDimitry Andric #endif 22fe6060f1SDimitry Andric 2306c3fb27SDimitry Andric _LIBCPP_PUSH_MACROS 2406c3fb27SDimitry Andric #include <__undef_macros> 2506c3fb27SDimitry Andric 26fe6060f1SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 27fe6060f1SDimitry Andric 28fe6060f1SDimitry Andric template <class _Tp> 29*0fca6ea1SDimitry Andric _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR __libcpp_remove_reference_t<_Tp>&& 30bdd1243dSDimitry Andric move(_LIBCPP_LIFETIMEBOUND _Tp&& __t) _NOEXCEPT { 31bdd1243dSDimitry Andric typedef _LIBCPP_NODEBUG __libcpp_remove_reference_t<_Tp> _Up; 32fe6060f1SDimitry Andric return static_cast<_Up&&>(__t); 33fe6060f1SDimitry Andric } 34fe6060f1SDimitry Andric 35fe6060f1SDimitry Andric template <class _Tp> 36fe6060f1SDimitry Andric using __move_if_noexcept_result_t = 37bdd1243dSDimitry Andric __conditional_t<!is_nothrow_move_constructible<_Tp>::value && is_copy_constructible<_Tp>::value, const _Tp&, _Tp&&>; 38fe6060f1SDimitry Andric 39fe6060f1SDimitry Andric template <class _Tp> 40*0fca6ea1SDimitry Andric _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __move_if_noexcept_result_t<_Tp> 41bdd1243dSDimitry Andric move_if_noexcept(_LIBCPP_LIFETIMEBOUND _Tp& __x) _NOEXCEPT { 42bdd1243dSDimitry Andric return std::move(__x); 43fe6060f1SDimitry Andric } 44fe6060f1SDimitry Andric 45fe6060f1SDimitry Andric _LIBCPP_END_NAMESPACE_STD 46fe6060f1SDimitry Andric 4706c3fb27SDimitry Andric _LIBCPP_POP_MACROS 4806c3fb27SDimitry Andric 49fe6060f1SDimitry Andric #endif // _LIBCPP___UTILITY_MOVE_H 50