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
16struct Error {
17 int i;
18 constexpr Error(int ii) : i(ii) {}
19};
20
21constexpr 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
29int main(int, char**) {
30 test();
31 static_assert(test());
32 return 0;
33}
34

source code of libcxx/test/std/utilities/expected/expected.unexpected/assign/assign.copy.pass.cpp