Re: OOD in Ada?

[Ed Falis <efalis@attbi.com>]

On Fri, 21 Jun 2002 17:20:13 GMT
"Pat Rogers" <progers@classwide.com> wrote:

> "David Crocker" <dcrocker@eschertech.com> wrote in message

> > 1. The infamous "withing" problem (i.e. it is not possible to declare 2
> > classes A and B, each in its own package, such that A has a method taking a
> > paremeter of type "access B", and B has a method with a parameter of type
> > "access A"); and
> 
> I have not found that problem to be frequent.  Others will tell about how to
> deal with it.

There should be a writeup on John Volan's solution to this at www.adapower.com


> The distinguished receiver syntax (the "dot notation") in no way indicates
> whether or not dynamic dispatching occurs.  In Eiffel and Java, for example, it
> happens all the time, and for C++ you have to look at the function definition to
> see whether or not it is marked virtual such that dynamic dispatch is even
> possible.  Similarly, in CLOS you look for "generic" functions.

Whereas with Ada, the controlling arguments must be declared class-wide for dispatching to occur.

- Ed