The code uses the two objects through the A interface and x()
is a virtual function on that interface.
[...]
Ali
The book "Programming in D" (r651) says in chapter "57.7 Using
the subclass in place of the superclass", in the example about
Clock and AlarmClock :
void use(Clock clock) { ... }
(sic) "In other words, although use() uses the object as a Clock,
the actual object may be an inherited type that behaves in its
own special way".
Should'nt we understand that the first object is a B, the second
object is a C and then should both behave like a B and a C, not
like two A ?
