| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 3 | // See https://llvm.org/LICENSE.txt for license information. |
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| 4 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 5 | // |
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| 6 | //===----------------------------------------------------------------------===// |
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| 7 | |
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| 8 | // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20 |
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| 9 | |
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| 10 | // template<class E2> |
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| 11 | // friend constexpr bool operator==(const unexpected& x, const unexpected<E2>& y); |
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| 12 | // |
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| 13 | // Mandates: The expression x.error() == y.error() is well-formed and its result is convertible to bool. |
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| 14 | // |
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| 15 | // Returns: x.error() == y.error(). |
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| 16 | |
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| 17 | #include <cassert> |
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| 18 | #include <concepts> |
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| 19 | #include <expected> |
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| 20 | #include <utility> |
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| 21 | |
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| 22 | struct Error{ |
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| 23 | int i; |
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| 24 | friend constexpr bool operator==(const Error&, const Error&) = default; |
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| 25 | }; |
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| 26 | |
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| 27 | constexpr bool test() { |
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| 28 | std::unexpected<Error> unex1(Error{2}); |
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| 29 | std::unexpected<Error> unex2(Error{3}); |
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| 30 | std::unexpected<Error> unex3(Error{2}); |
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| 31 | assert(unex1 == unex3); |
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| 32 | assert(unex1 != unex2); |
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| 33 | assert(unex2 != unex3); |
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| 34 | return true; |
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| 35 | } |
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| 36 | |
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| 37 | int main(int, char**) { |
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| 38 | test(); |
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| 39 | static_assert(test()); |
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| 40 | return 0; |
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| 41 | } |
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| 42 | |
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