forked from OSchip/llvm-project
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
// -*- 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
|