| //===----------------------------------------------------------------------===// |
| // 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 |
| |
| // constexpr explicit expected(in_place_t) noexcept; |
| |
| #include <cassert> |
| #include <expected> |
| #include <type_traits> |
| #include <utility> |
| |
| // test explicit |
| static_assert(std::is_constructible_v<std::expected<void, int>, std::in_place_t>); |
| static_assert(!std::is_convertible_v<std::in_place_t, std::expected<void, int>>); |
| |
| // test noexcept |
| static_assert(std::is_nothrow_constructible_v<std::expected<void, int>, std::in_place_t>); |
| |
| constexpr bool test() { |
| std::expected<void, int> e(std::in_place); |
| assert(e.has_value()); |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| return 0; |
| } |