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From: "Bob Spooner" <rls19@psu.edu>
Newsgroups: comp.lang.ada
Subject: Re: Surprise in array concatenation
Date: Fri, 9 Sep 2005 10:04:52 -0400
Organization: Penn State University, Center for Academic Computing
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Date: 2005-09-09T10:04:52-04:00
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"Jeffrey Carter" <spam@spam.com> wrote in message
news:B2_Te.5$oo1.2@dfw-service2.ext.ray.com...
> adaworks@sbcglobal.net wrote:
> >
> > Enumerated types, as presently designed, are not extensible.  They
> > do no encapsulate their operations, and new operations, though
> > they can be added, do not bind in a way that conforms to conventional
> > OO design principles.
>
> So? Ada types should not be a consideration during design. Once your
> have your design, you decide how to implement it. If enumerated types
> are not suitable, don't use them.
>
> Your compiler implements your design in machine code, which has no
> extension mechanisms. Should that affect your design?
>
> -- 

This type of discussion has come up before. The design is always influenced
by and constrained by what is available with which to implement it. And yes,
machine code characteristics such as word size do affect design. In the real
world, it is impossible to completely separate design from implementation.

Bob