v1/__memory/noexcept_move_assign_container.h

0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef _LIBCPP___MEMORY_NOEXCEPT_MOVE_ASSIGN_CONTAINER_H
0010 #define _LIBCPP___MEMORY_NOEXCEPT_MOVE_ASSIGN_CONTAINER_H
0011
0012 #include <__config>
0013 #include <__memory/allocator_traits.h>
0014 #include <__type_traits/integral_constant.h>
0015 #include <__type_traits/is_nothrow_assignable.h>
0016
0017 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0018 #  pragma GCC system_header
0019 #endif
0020
0021 _LIBCPP_BEGIN_NAMESPACE_STD
0022
0023 template <typename _Alloc, typename _Traits = allocator_traits<_Alloc> >
0024 struct __noexcept_move_assign_container
0025     : public integral_constant<bool,
0026                                _Traits::propagate_on_container_move_assignment::value
0027 #if _LIBCPP_STD_VER >= 17
0028                                    || _Traits::is_always_equal::value
0029 #else
0030                                    && is_nothrow_move_assignable<_Alloc>::value
0031 #endif
0032                                > {
0033 };
0034
0035 _LIBCPP_END_NAMESPACE_STD
0036
0037 #endif // _LIBCPP___MEMORY_NOEXCEPT_MOVE_ASSIGN_CONTAINER_H