ref2.c

gcc-you can use this code to learn something about gcc, and inquire further into linux,

// Build don't link:
// Origin: Jason Merrill <[e-mail]>

  struct A {
    int operator * ();
  };
  struct B : public A { };
  int operator * (B &);

  int main ()
  {
    B b;
    B& br = b;
    *br;
  }