38 lines
967 B
C++
38 lines
967 B
C++
// SPDX-License-Identifier: BSD-2-Clause
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// author: Max Kellermann <max.kellermann@gmail.com>
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#pragma once
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#include <concepts>
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/**
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* Compatibility wrapper for std::invocable which is unavailable in
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* the Android NDK r25b and Apple Xcode.
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*/
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#if !defined(ANDROID) && !defined(__APPLE__)
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template<typename F, typename... Args>
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concept Invocable = std::invocable<F, Args...>;
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#else
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template<typename F, typename... Args>
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concept Invocable = requires(F f, Args... args) {
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{ f(args...) };
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};
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#endif
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/**
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* Compatibility wrapper for std::predicate which is unavailable in
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* the Android NDK r25b and Apple Xcode.
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*/
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#if !defined(ANDROID) && !defined(__APPLE__)
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template<typename F, typename... Args>
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concept Predicate = std::predicate<F, Args...>;
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#else
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template<typename F, typename... Args>
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concept Predicate = requires(F f, Args... args) {
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{ f(args...) } -> std::same_as<bool>;
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};
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#endif
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template<typename F, typename T>
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concept Disposer = Invocable<F, T *>;
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