105 lines
1.8 KiB
C++
105 lines
1.8 KiB
C++
/*
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* utility_function.hpp
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*
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* Created on: Jun 20, 2021
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* Author: erki
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*/
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#ifndef SKULLC_UTILITY_FUNCTION_HPP_
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#define SKULLC_UTILITY_FUNCTION_HPP_
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#include <utility_assert.hpp>
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namespace Utility
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{
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template<class>
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class IFunction;
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template<typename R, typename... Args>
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class IFunction<R(Args...)>
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{
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public:
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using result_type = R;
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using static_signature = R (*)(Args...);
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virtual ~IFunction()
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{}
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virtual result_type operator()(Args... args) = 0;
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template<typename Tag>
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static_signature toStaticFunction()
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{
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static decltype(this) h = this;
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return +[](Args... args) { (*h)(args...); };
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}
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};
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template<class>
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class Function;
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template<typename R, typename... Args>
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class Function<R(Args...)> : public IFunction<R(Args...)>
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{
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public:
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using result_type = R;
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using signature = R (*)(Args...);
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Function() = delete;
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explicit Function(signature callable)
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: callable_(callable)
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{
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SKULLC_ASSERT_DEBUG(callable_);
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}
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~Function() override
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{
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}
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result_type operator()(Args... args) override
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{
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return (*callable_)(args...);
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}
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private:
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signature callable_ = nullptr;
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};
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template<class, class>
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class FunctionOwned;
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template<typename H, typename R, typename... Args>
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class FunctionOwned<H, R(Args...)> : public IFunction<R(Args...)>
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{
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public:
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using source = H;
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using result_type = R;
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using signature = R (source::*)(Args...);
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FunctionOwned() = delete;
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explicit FunctionOwned(source& src, signature callable)
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: src_(&src), callable_(callable)
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{
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SKULLC_ASSERT_DEBUG(callable_);
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}
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~FunctionOwned() override
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{}
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result_type operator()(Args... args) override
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{
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return (src_->*callable_)(args...);
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}
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private:
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source* src_ = nullptr;
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signature callable_ = nullptr;
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};
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}// namespace Utility
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#endif /* SKULLC_UTILITY_FUNCTION_HPP_ */
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