| //===----------------------------------------------------------------------===// |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20 |
| |
| // const char* what() const noexcept override; |
| |
| #include <expected> |
| #include <utility> |
| |
| template <class T> |
| concept WhatNoexcept = |
| requires(const T& t) { |
| { t.what() } noexcept; |
| }; |
| |
| struct foo{}; |
| |
| static_assert(!WhatNoexcept<foo>); |
| static_assert(WhatNoexcept<std::bad_expected_access<int>>); |
| static_assert(WhatNoexcept<std::bad_expected_access<foo>>); |