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// Test that we can refer to the address of a base member of a null pointer

// Test that we can refer to the address of a base member of a null pointer

// to get its offset.  The standard says that offsetof shall not be used on

// to get its offset.  The standard says that offsetof shall not be used on

// non-POD classes, but there seems to be no such restriction on the common

// non-POD classes, but there seems to be no such restriction on the common

// implementation thereof.

// implementation thereof.

// Yes, this is bad, naughty, evil code.  But it seems to be well-formed.

// Yes, this is bad, naughty, evil code.  But it seems to be well-formed.

// So we'll just warn.

// So we'll just warn.

// { dg-do run }

// { dg-do run }

struct A { int i; };

struct A { int i; };

struct B: public A {

struct B: public A {

  virtual void f ();

  virtual void f ();

};

};

struct C: public B { };

struct C: public B { };

int main ()

int main ()

{

{

  return ((unsigned long) &((C*)0)->i) != sizeof(void*); // { dg-warning "offsetof|invalid" "" }

  return ((unsigned long) &((C*)0)->i) != sizeof(void*); // { dg-warning "offsetof|invalid" "" }

}

}