hiding a class property behind a method

[Ali Çehreli]

On 02/22/2014 12:06 PM, Nynn007 wrote:

 >> The code uses the two objects through the A interface and x() is a
 >> virtual function on that interface.
 > [...]
 >> Ali

I agree. :)

 >
 > 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".

I obviously agree with that as well. :)

 >
 > 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 ?

You are correct. What I meant above is that the code uses the two object 
as two As, which involves the "interface" of A. The behaviors may be 
different.

Ali