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_COPY_ASSIGNABLE_H 10#define _LIBCPP___TYPE_TRAITS_IS_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 23template <class _Tp> 24struct _LIBCPP_TEMPLATE_VIS is_copy_assignable 25 : public integral_constant< 26 bool, 27 __is_assignable(__add_lvalue_reference_t<_Tp>, 28 __add_lvalue_reference_t<typename add_const<_Tp>::type>)> {}; 29 30#if _LIBCPP_STD_VER > 14 31template <class _Tp> 32inline constexpr bool is_copy_assignable_v = is_copy_assignable<_Tp>::value; 33#endif 34 35_LIBCPP_END_NAMESPACE_STD 36 37#endif // _LIBCPP___TYPE_TRAITS_IS_COPY_ASSIGNABLE_H 38