Properties

property.hpp

#include <iostream>
using namespace std;

template<class Class, class Type, const Type& (Class::*Getter)(),void (Class::*Setter)(const Type&)>
class property{
	Class* p_;

	Class* calc_p(const property& other){
		auto diff = reinterpret_cast<const char*>(&other) - reinterpret_cast<const char*>(other.p_);
		return reinterpret_cast<Class*>(reinterpret_cast< char*>(this) - diff);

	}

public:
	property(Class* p):p_(p){}
	property(const property& other):p_(calc_p(other)){}
	property& operator=(const property& other){
		p_ = calc_p(other);
		return *this;
	}

	operator const Type&(){
		return (p_->*Getter)();
	}

	property& operator=(const Type& val){
		(p_->*Setter)(val);
		return *this;
	}

};


struct Test{
	const int& get_v(){return v_;}
	void set_v(const int& v){v_ = v;}

	property<Test,int,&get_v,&set_v> v;
	Test():v(this),v_(){}

private:
	int v_;


};


//int main(){
//	cout << "Hello World\n";
//
//	Test t;
//	cout << t.v << endl;
//	t.v = 5;
//	cout << t.v << endl;
//	auto t2 = t;
//	t2.v = 6;
//	cout << t.v << " " << t2.v << endl;
//	cin.ignore();
//
//
//}