From: Robert A Duff <bobduff@shell01.TheWorld.com>
Subject: Re: Division by zero
Date: 12 Jun 2005 08:21:04 -0400
Date: 2005-06-12T08:21:04-04:00 [thread overview]
Message-ID: <wccfyvn6a1b.fsf@shell01.TheWorld.com> (raw)
In-Reply-To: GiIqe.6662$U4.962926@news.xtra.co.nz
"Lurker" <nowhere@nothing.com> writes:
> Hi,
>
> I'm curios about the problem which I discovered by accident.
> The code below is of course very much reduced to show
> the it:
>
> function x(a: integer) return integer is
>
> some_constant: constant := 0;
>
> begin
>
> -- return 1/some_constant; -- line 1
>
> -- return a/some_constant; -- line 2
>
> end;
Static expressions that raise exceptions are illegal,
so the compiler must give an error on line 1.
The compiler should complain about line 2
(a "warning" or some such), but it is not required to
by the Standard.
> If line 1 is uncommented compiler (Gnat 3.15 for Widows)
>
> produces the expected error about division by zero.
>
> If line 2 is uncommented it passes compilation with no problem.
>
> Surely that's not right? Or did I miss something?
This behavior conforms to the RM. But I suspect that
if you sent a bug report about line 2, the implementer
will fix it -- it's an obvious and easy-to-detect case
that is most likely an error.
- Bob
next prev parent reply other threads:[~2005-06-12 12:21 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-11 21:03 Division by zero Lurker
2005-06-12 2:00 ` David C. Hoos, Sr.
2005-06-12 3:04 ` Lurker
2005-06-12 8:39 ` Dmitry A. Kazakov
2005-06-12 9:43 ` Lurker
2005-06-12 10:36 ` Marius Amado Alves
2005-06-12 11:53 ` Dmitry A. Kazakov
2005-06-13 8:03 ` Ole-Hjalmar Kristensen
2005-06-12 13:10 ` Robert A Duff
2005-06-12 16:55 ` Jeffrey Carter
2005-06-13 3:22 ` Keith Thompson
2005-06-14 2:14 ` Jeffrey Carter
2005-06-13 8:47 ` Lurker
2005-06-14 2:19 ` Jeffrey Carter
2005-06-14 8:35 ` Keith Thompson
2005-06-13 12:19 ` Robert A Duff
2005-06-14 2:31 ` Jeffrey Carter
2005-06-14 8:21 ` Lurker
2005-06-14 20:22 ` Randy Brukardt
2005-06-28 21:22 ` Robert A Duff
2005-06-29 5:50 ` Lurker
2005-06-29 13:27 ` Robert A Duff
2005-06-29 13:54 ` Dmitry A. Kazakov
2005-06-29 16:03 ` Robert A Duff
2005-06-30 1:19 ` Lurker
2005-06-30 11:16 ` Stuart Palin
2005-06-29 13:50 ` Dmitry A. Kazakov
2005-06-29 16:07 ` Robert A Duff
2005-06-30 8:27 ` Dmitry A. Kazakov
2005-06-29 9:20 ` Lurker
2005-06-29 9:49 ` Christoph Grein
2005-06-29 10:40 ` Lurker
2005-06-29 11:04 ` Jeff Creem
2005-06-29 12:28 ` Martin Dowie
2005-06-29 13:40 ` Robert A Duff
[not found] ` <5sana1pm436l6vboifijqblu0irf84afkr@4ax.com>
2005-06-12 17:38 ` Simon Wright
2005-06-12 12:21 ` Robert A Duff [this message]
2005-06-12 22:53 ` Georg Bauhaus
2005-06-13 8:34 ` Lurker
2005-06-13 8:54 ` Marius Amado Alves
2005-06-13 17:59 ` Simon Wright
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