"James A. Robertson" wrote:
> > How does Smalltalk:
> > * allow me to declare circle as a subtype of ellipse?
>
> I subclass Circle from Ellipse
>
> > * allow me to send the setFoci message to ellipse variables (that
> > incidentally contain circle values) with two different focal points?
>
> I override the methods in the subclass so that each gets appropriate
> behavior. If the ellipse variable contain circle values, ,my
> application code is wrong>
>
> > * prevent me from sending the setFoci message to circle variables?
>
> See above.
James, please stop patching up his daft questions. There is no
such thing as an ellipse variable in smalltalk.
Received on Tue Oct 09 2001 - 08:41:35 CDT
