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_ASSIGNABLE_H 10 #define _LIBCPP___TYPE_TRAITS_IS_NOTHROW_ASSIGNABLE_H 11 12 #include <__config> 13 #include <__type_traits/add_lvalue_reference.h> 14 #include <__type_traits/add_rvalue_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, class _Arg> 24 struct _LIBCPP_TEMPLATE_VIS is_nothrow_assignable : public integral_constant<bool, __is_nothrow_assignable(_Tp, _Arg)> { 25 }; 26 27 #if _LIBCPP_STD_VER >= 17 28 template <class _Tp, class _Arg> 29 inline constexpr bool is_nothrow_assignable_v = __is_nothrow_assignable(_Tp, _Arg); 30 #endif 31 32 template <class _Tp> 33 struct _LIBCPP_TEMPLATE_VIS is_nothrow_copy_assignable 34 : public integral_constant< 35 bool, 36 __is_nothrow_assignable(__add_lvalue_reference_t<_Tp>, __add_lvalue_reference_t<const _Tp>)> {}; 37 38 #if _LIBCPP_STD_VER >= 17 39 template <class _Tp> 40 inline constexpr bool is_nothrow_copy_assignable_v = is_nothrow_copy_assignable<_Tp>::value; 41 #endif 42 43 template <class _Tp> 44 struct _LIBCPP_TEMPLATE_VIS is_nothrow_move_assignable 45 : public integral_constant<bool, 46 __is_nothrow_assignable(__add_lvalue_reference_t<_Tp>, __add_rvalue_reference_t<_Tp>)> { 47 }; 48 49 #if _LIBCPP_STD_VER >= 17 50 template <class _Tp> 51 inline constexpr bool is_nothrow_move_assignable_v = is_nothrow_move_assignable<_Tp>::value; 52 #endif 53 54 _LIBCPP_END_NAMESPACE_STD 55 56 #endif // _LIBCPP___TYPE_TRAITS_IS_NOTHROW_ASSIGNABLE_H 57