typedef struct Stack<Type, Impl>{
        Type* stack;
        Type* data;
        Type* data1;
        __code whenEmpty(...);
        __code clear(Impl* stack,__code next(...));
        __code push(Impl* stack,Type* data, __code next(...));
        __code pop(Impl* stack, __code next(Type* data, ...));
        __code pop2(Impl* stack, Type** data, Type** data1, __code next(Type** data, Type** data1, ...));
        __code isEmpty(Impl* stack, __code next(...), __code whenEmpty(...));
        __code get(Impl* stack, Type** data, __code next(...));
        __code get2(Impl* stack,..., __code next(...));
        __code next(...);
} Stack;