8afa6cf510
Implements https://wg21.link/P2944R3 (partially) Implements https://wg21.link/LWG4071 / https://cplusplus.github.io/LWG/issue4071 (fixes build failures in the test suite) - https://eel.is/c++draft/refwrap.comparisons
63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++23
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// <functional>
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// class reference_wrapper
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// [refwrap.comparisons], comparisons
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// friend constexpr bool operator==(reference_wrapper, const T&); // Since C++26
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#include <cassert>
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#include <concepts>
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#include <functional>
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#include "test_comparisons.h"
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#include "test_macros.h"
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#include "helper_concepts.h"
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#include "helper_types.h"
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// Test SFINAE.
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static_assert(HasEqualityOperatorWithInt<std::reference_wrapper<EqualityComparable>>);
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static_assert(!HasEqualityOperatorWithInt<std::reference_wrapper<NonComparable>>);
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// Test equality.
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template <typename T>
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constexpr void test() {
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T i{92};
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T j{84};
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std::reference_wrapper<T> rw1{i};
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// refwrap, const&
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AssertEqualityReturnBool<decltype(rw1), decltype(i)>();
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assert(testEquality(rw1, i, true));
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assert(testEquality(rw1, j, false));
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}
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constexpr bool test() {
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test<int>();
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test<EqualityComparable>();
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return true;
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}
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int main(int, char**) {
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test();
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static_assert(test());
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return 0;
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}
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