From: Matthew Woodcraft <mattheww@chiark.greenend.org.uk>
Subject: Re: A case where Ada defaults to unsafe?
Date: 07 Jan 2002 20:26:56 +0000
Date: 2002-01-07T20:26:56+00:00 [thread overview]
Message-ID: <87advpdi0f.fsf@chiark.greenend.org.uk> (raw)
In-Reply-To: 3C39E726.8000408@mail.com
Hyman Rosen <hyrosen@mail.com> writes:
> What many of you seem to forget is that the commutative form requires
> that both operands are evaluated. Of course the compiler can elide by
> the as-if rule, but not if there is a chance of overflow:
>
> if a + b > 3 and x + y < 4 -- case 1
> if a + b > 3 and then x + y < 4 -- case 2
>
> In the first case, if there is a chance that evaluating x + y could
> lead to overflow, the compiler cannot forgo the evaluation even in
> the case of a + b <= 3, becuase the exception must be generated.
Doesn't RM 11.6 allow the compiler to ignore this exception?
-M-
next prev parent reply other threads:[~2002-01-07 20:26 UTC|newest]
Thread overview: 120+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-05 12:47 A case where Ada defaults to unsafe? Gautier Write-only-address
2002-01-07 16:24 ` Ted Dennison
2002-01-07 18:17 ` FGD
2002-01-07 18:21 ` Hyman Rosen
2002-01-07 20:26 ` Matthew Woodcraft [this message]
2002-01-07 21:16 ` Hyman Rosen
2002-01-13 8:23 ` Hyman Rosen
2002-01-13 9:06 ` Preben Randhol
2002-01-13 10:41 ` Larry Kilgallen
2002-01-14 5:47 ` Hyman Rosen
2002-01-14 12:41 ` Georg Bauhaus
2002-01-13 18:21 ` Michal Nowak
2002-01-14 1:29 ` Ted Dennison
2002-01-14 14:36 ` Ted Dennison
2002-01-14 22:43 ` Michal Nowak
2002-01-10 20:47 ` Robert A Duff
2002-01-10 23:37 ` Preben Randhol
2002-01-11 1:31 ` Robert A Duff
2002-01-11 20:32 ` Nick Roberts
2002-01-11 16:47 ` Hyman Rosen
-- strict thread matches above, loose matches on Subject: below --
2002-01-07 16:45 Gautier Write-only-address
2002-01-07 19:33 ` Ted Dennison
2002-01-03 23:26 Gautier Write-only-address
2002-01-03 23:54 ` Larry Hazel
2002-01-04 14:33 ` Robert A Duff
2002-01-03 23:18 Gautier Write-only-address
2002-01-03 20:29 Hyman Rosen
2002-01-03 20:38 ` Darren New
2002-01-03 21:36 ` Hyman Rosen
2002-01-04 14:29 ` Wes Groleau
2002-01-03 21:27 ` James Rogers
2002-01-03 21:32 ` Frank J. Lhota
2002-01-03 21:51 ` Hyman Rosen
2002-01-03 22:22 ` Ted Dennison
2002-01-03 23:07 ` Hyman Rosen
2002-01-03 23:38 ` Nick Williams
2002-01-04 0:15 ` Florian Weimer
2002-01-04 7:40 ` Preben Randhol
2002-01-04 14:39 ` Wes Groleau
2002-01-04 15:16 ` Ted Dennison
2002-01-04 3:35 ` Eric Merritt
2002-01-04 14:39 ` Robert A Duff
2002-01-04 14:27 ` Robert A Duff
2002-01-04 15:39 ` Larry Kilgallen
2002-01-04 15:57 ` Ted Dennison
2002-01-04 16:05 ` Ted Dennison
2002-01-10 21:22 ` Robert A Duff
2002-01-11 9:14 ` Dmitry A. Kazakov
2002-01-04 16:19 ` Brian Rogoff
2002-01-04 16:31 ` Ted Dennison
2002-01-08 20:55 ` Mark Lundquist
2002-01-16 0:14 ` Matthew Heaney
2002-01-16 20:19 ` Robert A Duff
2002-01-10 21:29 ` Robert A Duff
2002-01-11 9:25 ` Dmitry A. Kazakov
2002-01-19 0:35 ` Brian Rogoff
2002-01-19 14:15 ` Robert A Duff
2002-01-19 23:10 ` Brian Rogoff
2002-01-04 16:29 ` Robert Dewar
2002-01-04 17:32 ` Hyman Rosen
2002-01-04 18:50 ` Matthew Heaney
2002-01-04 18:56 ` Darren New
2002-01-04 19:10 ` Hyman Rosen
2002-01-04 20:08 ` Matthew Heaney
2002-01-04 20:14 ` Ted Dennison
2002-01-04 20:20 ` Hyman Rosen
2002-01-04 21:16 ` Larry Kilgallen
2002-01-04 21:33 ` Ted Dennison
2002-01-07 15:39 ` Hyman Rosen
2002-01-07 16:06 ` Ted Dennison
2002-01-07 16:50 ` Larry Kilgallen
2002-01-07 17:18 ` Hyman Rosen
2002-01-07 17:26 ` Pat Rogers
2002-01-07 18:12 ` Hyman Rosen
2002-01-07 18:40 ` FGD
2002-01-07 20:04 ` Pat Rogers
2002-01-05 0:08 ` Nick Roberts
2002-01-05 10:57 ` Simon Wright
2002-01-08 23:27 ` Nick Roberts
2002-01-09 9:58 ` Stuart Palin
2002-01-09 11:11 ` Nick Roberts
2002-01-10 20:32 ` Robert A Duff
2002-01-11 9:45 ` Stuart Palin
2002-01-11 13:32 ` Robert A Duff
2002-01-14 13:14 ` Stuart Palin
2002-01-14 14:38 ` Preben Randhol
2002-01-16 6:00 ` Simon Wright
2002-01-17 3:04 ` David Starner
2002-01-17 15:08 ` Georg Bauhaus
2002-01-17 20:25 ` Simon Wright
2002-01-17 9:56 ` Stuart Palin
[not found] ` <3 <3C469FE6.B2C67ED6@baesystems.com>
2002-01-17 20:32 ` Simon Wright
2002-01-14 14:35 ` Preben Randhol
2002-01-14 16:36 ` Robert A Duff
2002-01-12 12:27 ` Simon Wright
2002-01-05 0:32 ` Robert Dewar
2002-01-14 16:09 ` Matthieu Moy
2002-01-20 8:59 ` Hyman Rosen
2002-01-20 19:13 ` Jim Rogers
2002-01-20 21:19 ` Ray Blaak
2002-01-03 22:07 ` Ted Dennison
2002-01-04 17:12 ` Preben Randhol
2002-01-04 17:21 ` Jean-Marc Bourguet
2002-01-04 18:54 ` Ted Dennison
2002-01-04 3:17 ` Larry Kilgallen
2002-01-04 8:27 ` Thierry Lelegard
2002-01-04 8:39 ` tmoran
2002-01-04 9:03 ` Thierry Lelegard
2002-01-04 14:43 ` Wes Groleau
2002-01-04 15:45 ` Ted Dennison
2002-01-04 16:37 ` Wes Groleau
2002-01-04 16:56 ` Ted Dennison
2002-01-04 11:51 ` Larry Kilgallen
2002-01-04 12:41 ` M. A. Alves
2002-01-04 15:42 ` Ted Dennison
2002-01-04 17:16 ` Hyman Rosen
2002-01-04 19:12 ` Ted Dennison
2002-01-04 23:36 ` Matthew Woodcraft
2002-01-05 15:00 ` Steve Doiel
2002-01-10 20:49 ` Robert A Duff
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox