Created
January 18, 2014 02:47
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C++ Lightning Fast Function Wrapper
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| template<typename T> | |
| class Delegate{}; | |
| template<typename Return, typename ... Args> | |
| class Delegate<Return(Args ...)> | |
| { | |
| private: | |
| class AnyClass; | |
| using AnyMemberFunc = Return(AnyClass::*)(Args...); | |
| using AnyStaticFunc = Return(*)(Args...); | |
| AnyClass* object_ = nullptr; | |
| AnyMemberFunc member_func_ = nullptr; | |
| AnyStaticFunc static_func_ = nullptr; | |
| public: | |
| inline Delegate() = default; | |
| template<typename Class, typename MemberFunc> | |
| inline Delegate(Class* object,MemberFunc func) | |
| { | |
| Bind(object,func); | |
| } | |
| inline Delegate(AnyStaticFunc func) | |
| { | |
| Bind(func); | |
| } | |
| template<typename Class, typename MemberFunc> | |
| inline void Bind(Class* object, MemberFunc func) | |
| { | |
| this->object_ = reinterpret_cast<AnyClass*>(object); | |
| this->member_func_ = reinterpret_cast<AnyMemberFunc>(func); | |
| this->static_func_ = nullptr; | |
| } | |
| inline void Bind(AnyStaticFunc func) | |
| { | |
| this->object_ = nullptr; | |
| this->member_func_ = nullptr; | |
| this->static_func_ = func; | |
| } | |
| inline Return operator()(Args... args) const | |
| { | |
| if(static_func_) return (*(static_func_))(std::forward<Args>(args)...); | |
| return (object_->*member_func_)(std::forward<Args>(args)...); | |
| } | |
| inline std::size_t Hash() const | |
| { | |
| if(static_func_) return reinterpret_cast<std::size_t>(static_func_); | |
| return | |
| reinterpret_cast<std::size_t>(object_) ^ | |
| reinterpret_cast<std::size_t>(member_func_); | |
| } | |
| inline bool operator==(const Delegate& delegate) const | |
| { | |
| if(static_func_ || delegate.static_func_ ) return this->static_func_ == delegate.static_func_; | |
| return | |
| this->object_ == delegate.object_ && | |
| this->member_func_ == delegate.member_func_; | |
| } | |
| inline bool operator!=(const Delegate& delegate) const {return !operator==(delegate);} | |
| }; | |
| namespace std { | |
| template<typename Return, typename ... Args> | |
| struct hash<Delegate<Return(Args...)> > | |
| { | |
| std::size_t operator()(const Delegate<Return(Args...)>& delegate) const | |
| { | |
| return delegate.Hash(); | |
| } | |
| }; | |
| }; | |
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