From: Ted Dennison<dennison@telepath.com>
Subject: Re: A case where Ada defaults to unsafe?
Date: Thu, 03 Jan 2002 22:07:52 GMT
Date: 2002-01-03T22:07:52+00:00 [thread overview]
Message-ID: <YC4Z7.2733$cD4.5588@www.newsranger.com> (raw)
In-Reply-To: 3C34BF2C.6030500@mail.com
In article <3C34BF2C.6030500@mail.com>, Hyman Rosen says...
>So in Ada, one could say 'if a /= 0 and b/a > 3' and fall into a
>trap that would not happen in C/C++. Discuss?
..only if one incorrectly assumes they short-circuit. This is basicly
equivalent to saying Ada is bad because it doesn't behave exactly like C.
The reason things were done this way was so that the optimizer could rearrange
and short-circuit the expression itself (or not) depending on what is more
efficient on its architecture. See the Ada 83 Rationale 3.10 if you really want
a discussion ( online at
http://archive.adaic.com/standards/83rat/html/ratl-03-10.html#3.10 )
If you are going to complain about things that are unsafe in Ada but not in C,
you'd better get started on assuming an integer is passed by value too. And then
tasking introduces a world of possible errors that C doesn't have...
---
T.E.D. homepage - http://www.telepath.com/dennison/Ted/TED.html
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next prev parent reply other threads:[~2002-01-03 22:07 UTC|newest]
Thread overview: 127+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-03 20:29 A case where Ada defaults to unsafe? 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
2002-01-11 20:26 ` Literate Programming [was: A case where ...] Nick Roberts
2002-01-12 16:37 ` Georg Bauhaus
2002-01-13 14:46 ` Nick Roberts
2002-01-14 14:17 ` Eric Merritt
2002-01-14 23:20 ` Nick Roberts
2002-01-15 18:54 ` Eric Merritt
2002-01-14 14:34 ` Stephen Leake
2002-01-14 13:14 ` A case where Ada defaults to unsafe? 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 [this message]
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
-- strict thread matches above, loose matches on Subject: below --
2002-01-03 23:18 Gautier Write-only-address
2002-01-03 23:26 Gautier Write-only-address
2002-01-03 23:54 ` Larry Hazel
2002-01-04 14:33 ` Robert A Duff
2002-01-05 12:47 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
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
2002-01-07 16:45 Gautier Write-only-address
2002-01-07 19:33 ` Ted Dennison
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