65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
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// Copyright 2021 yuzu emulator team
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <memory>
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#include <utility>
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namespace Common {
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template <typename ResultType, typename... Args>
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class UniqueFunction {
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class CallableBase {
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public:
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virtual ~CallableBase() = default;
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virtual ResultType operator()(Args...) = 0;
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};
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template <typename Functor>
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class Callable final : public CallableBase {
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public:
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Callable(Functor&& functor_) : functor{std::move(functor_)} {}
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~Callable() override = default;
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ResultType operator()(Args... args) override {
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return functor(std::forward<Args>(args)...);
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}
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private:
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Functor functor;
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};
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public:
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UniqueFunction() = default;
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template <typename Functor>
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UniqueFunction(Functor&& functor)
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: callable{std::make_unique<Callable<Functor>>(std::move(functor))} {}
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UniqueFunction& operator=(UniqueFunction<ResultType, Args...>&& rhs) noexcept {
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callable = std::move(rhs.callable);
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return *this;
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}
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UniqueFunction(UniqueFunction<ResultType, Args...>&& rhs) noexcept
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: callable{std::move(rhs.callable)} {}
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ResultType operator()(Args... args) const {
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return (*callable)(std::forward<Args>(args)...);
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}
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explicit operator bool() const noexcept {
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return callable != nullptr;
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}
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UniqueFunction& operator=(const UniqueFunction<ResultType, Args...>&) = delete;
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UniqueFunction(const UniqueFunction<ResultType, Args...>&) = delete;
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private:
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std::unique_ptr<CallableBase> callable;
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};
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} // namespace Common
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