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From: Christoph Grein <christoph.grein@eurocopter.com>
Newsgroups: comp.lang.ada
Subject: Re: ARG Urgent Problems (was: labeling)
Date: Tue, 19 Mar 2002 14:36:18 +0100 (MET)
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Date: 2002-03-19T14:36:18+01:00

From: Jean-Pierre Rosen <rosen@adalog.fr>
> "Tarjei T. Jensen" <tarjei.jensen@kvaerner.com> a =E9crit dans le =
message news:=20
a7700l$84f4@news.kvaerner.com...
> > C allows both integers and unsigned to wrap, but somehow those who =
decides
> > these things think that therefore Ada unsigned above integer'last =
must wrap
> > as well.
> >
> Maybe it's just that you missed an important feature of Ada: don't =
use=20
predefined types, specify your needs, then declare the
> appropriate types. You want a 32 bits integer without wrapping =
semantics?=20
Fine, just declare:
>=20
> type My_Int is range 0..2**32-1;
>=20
> Your point is that there is no *predefined* type for this; in other =
languages=20
you must rely on predefined types because it is all
> you have - not in Ada.

The only problem being that your compiler might reject to compile this =
because=20
it cannot fulfil the request. My_Int'Base will necessarily be a =
_signed_integer_=20
at least big enough to hold the specified range, will thus need at =
least 33=20
bits, most probably a 64 bit=20
type.