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
39 lines
1.1 KiB
C++
39 lines
1.1 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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#ifndef TEST_STD_FUNCTIONOBJECTS_REFWRAP_HELPER_CONCEPTS_H
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#define TEST_STD_FUNCTIONOBJECTS_REFWRAP_HELPER_CONCEPTS_H
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#include <concepts>
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#include <utility>
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// Equality
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template <typename T>
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concept HasEqualityOperatorWithInt = requires(T t, int i) {
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{ t.get() == i } -> std::convertible_to<bool>;
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};
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// Spaceship
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template <class T>
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concept BooleanTestableImpl = std::convertible_to<T, bool>;
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template <class T>
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concept BooleanTestable = BooleanTestableImpl<T> && requires(T&& t) {
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{ !std::forward<T>(t) } -> BooleanTestableImpl;
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};
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template <typename T>
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concept HasSpaceshipOperatorWithInt = requires(T t, int i) {
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{ t < i } -> BooleanTestable;
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{ i < t } -> BooleanTestable;
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};
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#endif // TEST_STD_FUNCTIONOBJECTS_REFWRAP_HELPER_CONCEPTS_H
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