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From: Stephen Leake <stephen.a.leake.1@gsfc.nasa.gov>
Newsgroups: comp.lang.ada
Subject: Re: OOD in Ada?
Date: 24 Jun 2002 10:19:35 -0400
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Ted Dennison <dennison@telepath.com> writes:

> Pat Rogers wrote:
> > "David Crocker" <dcrocker@eschertech.com> wrote in message
> > news:3d135676$0$8511$cc9e4d1f@news.dial.pipex.com...
> >>as an OO developer but Ada novice, it appears to me that any attempt to
> >>implement a large OO design in Ada will run into the following problems:
> >>
> >>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.
> 
> Since you can't do it, it will eventally become second nature to
> design in such a way that it doesn't happen. 

Actually, you can do it in GNAT; it supports the "with type"
extension.

The only time I've used it is when importing Java code; that's why the
"with type" extension was added.

> When it does, I generally consider this the language's little way of
> telling me that my code needs to be better structured.

In general, I agree with this.

-- 
-- Stephe