From: Christoph Grein <christoph.grein@eurocopter.com>
Subject: Re: constrained subtypes
Date: Tue, 12 Mar 2002 11:37:49 +0100 (MET)
Date: 2002-03-12T11:37:49+01:00 [thread overview]
Message-ID: <mailman.1015929542.17171.comp.lang.ada@ada.eu.org> (raw)
subtype S is Integer range 1 .. 4;
V : S
begin
case V is
when 1 =>
[statement]
when 2 .. 3 =>
[statement]
when 4 =>
[statement]
end case;
case (V) is -- (V) is an expression of type Integer
when 1 =>
[statement]
when 2 .. 3 =>
[statement]
when 4 =>
[statement]
when others => -- needed
[statement]
end case;
> Problem seemed to be in using:
>
> case (constrained_subtype)
>
> rather than:
>
> case constrained_subtype
>
> Removing the brackets sorted the problem. Not sure why this is a problem
> for constrained subtypes, as the compilers cope fine for enums and (base)
> integers.
>
> Sorry I didn't put the original code in my post, but was away from my build
> machine, so was relying on my memory. Thanks for all reponses.
>
>
> "George Stevens" <george.stevens@baesystems.com> wrote in message
> news:3c8cc63b$1@pull.gecm.com...
> > We're trying to use subtypes of base integer, constraining them 1 .. 8
> > (i.e. static values)
> > When we use these types in a case statement, covering values 1 - 8, the
> > Aonix Ada compiler (7.1.2) complains that we haven't defined "others".
> > However, we shouldn't need to, as all cases are within the constrained
> > limits. I've looked at Programming in Ada 95 - Barnes (p106) which seems
> to
> > suggest that we're doing the right thing language-wise, so long as the
> range
> > limits are static types.
> >
> > Is this a compiler funny or an Ada funny?
> >
> >
>
>
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> comp.lang.ada@ada.eu.org
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next reply other threads:[~2002-03-12 10:37 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-12 10:37 Christoph Grein [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-03-14 11:01 constrained subtypes Christoph Grein
2002-03-13 6:22 Christoph Grein
2002-03-13 14:18 ` Robert Dewar
2002-03-12 7:59 Christoph Grein
2002-03-11 15:00 George Stevens
2002-03-11 16:16 ` Stephen Leake
2002-03-11 16:50 ` Jeffrey Carter
2002-03-11 21:05 ` Anh_Vo
2002-03-12 9:39 ` George Stevens
2002-03-12 10:38 ` Martin Dowie
2002-03-12 11:57 ` George Stevens
2002-03-12 12:02 ` Martin Dowie
2002-03-12 12:03 ` Martin Dowie
2002-03-12 16:42 ` Jeffrey Carter
2002-03-13 22:09 ` Wannabe h4x0r
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