1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef _LIBCPP___TYPE_TRAITS_IS_NOTHROW_COPY_ASSIGNABLE_H
10 #define _LIBCPP___TYPE_TRAITS_IS_NOTHROW_COPY_ASSIGNABLE_H
11 
12 #include <__config>
13 #include <__type_traits/add_const.h>
14 #include <__type_traits/add_lvalue_reference.h>
15 #include <__type_traits/integral_constant.h>
16 
17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18 #  pragma GCC system_header
19 #endif
20 
21 _LIBCPP_BEGIN_NAMESPACE_STD
22 
23 template <class _Tp>
24 struct _LIBCPP_TEMPLATE_VIS is_nothrow_copy_assignable
25     : public integral_constant<
26           bool,
27           __is_nothrow_assignable(
28               __add_lvalue_reference_t<_Tp>,
29               __add_lvalue_reference_t<typename add_const<_Tp>::type>)> {};
30 
31 #if _LIBCPP_STD_VER > 14
32 template <class _Tp>
33 inline constexpr bool is_nothrow_copy_assignable_v = is_nothrow_copy_assignable<_Tp>::value;
34 #endif
35 
36 _LIBCPP_END_NAMESPACE_STD
37 
38 #endif // _LIBCPP___TYPE_TRAITS_IS_NOTHROW_COPY_ASSIGNABLE_H
39