TITLE: A reference member in a class will prohibit assignment


[ Adapted from "C++ Gotchas", tutorial notes by Tom Cargill, p. 47 ]


struct Point {
	double x;
	double y;
};

struct Rectangle {
	Point& ne;
	Point& sw;

	Rectangle (Point&, Point&);
};

Rectangle :: Rectangle (Point& a, Point& b) : ne(a), sw(b) { }


int main ()
{
	Point p, q, r, s;
	Rectangle wet (p, q), dry (r, s);

	wet = dry; // error
	return 0;
}