bad touch

template <class T, class U> class Pair{
public:
    T a;
    U b;

    Pair(){
        a = T();
        b = U();
    };

    Pair(T aa, U bb){
        a = aa;
        b = bb;
    };
};

class touch{
public:
    uint16_t x;
    uint16_t y;

    touch(){};

    void ReadCoordinates(void);

    Pair<uint16_t, uint16_t> ReadKey(void);

    void wait_release_key(void);
};


Pair<uint16_t, uint16_t> touch::ReadKey(void)
{
    Touch.ReadCoordinates();
    wait_release_key();
    return Pair<uint16_t, uint16_t>(this->x, this->y);
}