template<typename T1,typename T2>
class Converter
{
private:
union _L2D
T1 L;
T2 D;
}
L2D;
public:
T2 operator[](const T1 L)
L2D.L = L;
return L2D.D;
T1 operator[](const T2 D)
L2D.D = D;
return L2D.L;
};