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-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20 |
10 | |
11 | // constexpr unexpected& operator=(const unexpected&) = default; |
12 | |
13 | #include <cassert> |
14 | #include <expected> |
15 | |
16 | struct Error { |
17 | int i; |
18 | constexpr Error(int ii) : i(ii) {} |
19 | }; |
20 | |
21 | constexpr bool test() { |
22 | std::unexpected<Error> unex1(4); |
23 | const std::unexpected<Error> unex2(5); |
24 | unex1 = unex2; |
25 | assert(unex1.error().i == 5); |
26 | return true; |
27 | } |
28 | |
29 | int main(int, char**) { |
30 | test(); |
31 | static_assert(test()); |
32 | return 0; |
33 | } |
34 | |