
struct C
{
  int d;
};

struct B
{
  C c;
  C* operator->()
  {
    return &c;
  }
};

struct A
{
  B b;
  B& operator->()
  {
    return b;
  }
};

int main()
{
  A a;
  a->d = 2;
  assert(a.b.c.d==2);
}
