1//===----------------------------------------------------------------------===//
2// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
3// See https://llvm.org/LICENSE.txt for license information.
4// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
5//
6//===----------------------------------------------------------------------===//
7
8// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
9
10// constexpr expected() noexcept;
11
12#include <cassert>
13#include <expected>
14#include <type_traits>
15
16#include "test_macros.h"
17
18// Test noexcept
19
20struct NoDefaultCtor {
21 constexpr NoDefaultCtor() = delete;
22};
23
24static_assert(std::is_nothrow_default_constructible_v<std::expected<void, int>>);
25static_assert(std::is_nothrow_default_constructible_v<std::expected<void, NoDefaultCtor>>);
26
27struct MyInt {
28 int i;
29 friend constexpr bool operator==(const MyInt&, const MyInt&) = default;
30};
31
32constexpr bool test() {
33 // default constructible
34 {
35 std::expected<void, int> e;
36 assert(e.has_value());
37 }
38
39 // non-default constructible
40 {
41 std::expected<void, NoDefaultCtor> e;
42 assert(e.has_value());
43 }
44
45 return true;
46}
47
48int main(int, char**) {
49 test();
50 static_assert(test());
51 return 0;
52}
53

source code of libcxx/test/std/utilities/expected/expected.void/ctor/ctor.default.pass.cpp