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