| // Copyright (C) 2016-2023 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // { dg-do compile { target c++11 } } |
| |
| #include <type_traits> |
| |
| template<typename... T> |
| constexpr bool is_nt_invocable() |
| { return std::__is_nothrow_invocable<T...>::value; } |
| |
| template<typename R, typename... T> |
| struct ConvIsNothrow |
| { |
| using result_type = typename std::__invoke_result<T...>::type; |
| static void test(std::true_type, R) noexcept; |
| static void test(std::false_type, const result_type&); |
| static constexpr bool value |
| = noexcept(test(std::is_convertible<result_type, R>(), |
| std::declval<result_type>())); |
| }; |
| |
| template<typename... T> |
| struct ConvIsNothrow<void, T...> : std::true_type |
| { }; |
| |
| template<typename R, typename... T> |
| constexpr bool is_nt_invocable_conv(std::true_type) |
| { |
| return ConvIsNothrow<R, T...>::value; |
| } |
| |
| template<typename R, typename... T> |
| constexpr bool is_nt_invocable_conv(std::false_type) { return false; } |
| |
| template<typename R, typename... T> |
| constexpr bool is_nt_invocable_r() |
| { |
| return is_nt_invocable_conv<R, T...>(std::__is_nothrow_invocable<T...>{}); |
| } |
| |
| #define IS_NT_INVOCABLE_DEFINED |
| #include "value.cc" |
