struct Base{
  int x=0;
};

struct Derived : public Base {
  static int myint =1;
  Derived(){x+=myint;}
};

struct Derived2 : public Derived {
  static int myint = 2;
  Derived2(){x+=myint;}
};

template<class A>
struct BaseX : public Base {
  static int myint;
  BaseX() {Base::x+=myint;}
}

struct Derived : public BaseX<Derived>;