54 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++17, c++2010 11// constexpr expected() noexcept;12 13#include <cassert>14#include <expected>15#include <type_traits>16 17#include "test_macros.h"18 19// Test noexcept20 21struct NoDefaultCtor {22 constexpr NoDefaultCtor() = delete;23};24 25static_assert(std::is_nothrow_default_constructible_v<std::expected<void, int>>);26static_assert(std::is_nothrow_default_constructible_v<std::expected<void, NoDefaultCtor>>);27 28struct MyInt {29 int i;30 friend constexpr bool operator==(const MyInt&, const MyInt&) = default;31};32 33constexpr bool test() {34 // default constructible35 {36 std::expected<void, int> e;37 assert(e.has_value());38 }39 40 // non-default constructible41 {42 std::expected<void, NoDefaultCtor> e;43 assert(e.has_value());44 }45 46 return true;47}48 49int main(int, char**) {50 test();51 static_assert(test());52 return 0;53}54