TITLE: Sizeof and addressof references


[ Adapted from "C++ Gotchas", tutorial by Tom Cargill,
  p. 39. ]

[ THIS CORRECTED VERSION FIXES A MISREADING ON MY PART, AND
  INCORRECT CITATIONS ON CARGILL'S PART. THANKYOU, PAT ]


struct Point {
	double x;
	double y;
	double z;
};

int main()
{
	Point p;
	Point& r = p;

	ASSERTION (sizeof (r) == sizeof (Point));
	ASSERTION (&r == &p);

	return 0;
}

Note that both assertions will SUCCEED. The pointer here is that in
most cases, sizeof() and address-of, when applied to references
really get applied to the object being referenced, NOT the underlying
implementation (probably a standard pointer). There is no way to
access this underlying pointer.

For more information, see the ARM, p. 56, 57.