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//===----------------------------------------------------------------------===//
// 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
// SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
// 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>>);
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