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From: Florian Weimer <fw@deneb.enyo.de>
Newsgroups: comp.lang.ada
Subject: Re: Extended modal types
Date: Sat, 25 May 2002 20:40:36 +0200
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"Frank J. Lhota" <NOSPAM.FrankLho@rcn.com> writes:

> I think the real issue here is that for moduli other than powers of 2, e.g.
>
>     type r is mod 446;
>
> the bitwise operations "and", "or", and "not" simply do not have any
> intuitive meaning. It may very well have been preferable for these
> operations to be undefined for mod 446.

You can't do that without violating the generic contract model.

(IMHO, modular types whose modular type whose modulus is not a power
of two should have been avoided altogether.)