From: Martin Jambon <martin1977@laposte.net>
To: Pal-Kristian Engstad <pal_engstad@naughtydog.com>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] if (n:int) < 0 then (-n) > 0 is FALSE
Date: Thu, 7 Dec 2006 13:13:19 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.58.0612071309150.13303@localhost> (raw)
In-Reply-To: <45785E27.8050804@naughtydog.com>
On Thu, 7 Dec 2006, Pal-Kristian Engstad wrote:
> To find that it loops forever. The reason is that 1024*1024*1024=2^30
> cannot be represented as a positive number on 32-bit platforms, hence it
> silently converts it to -1073741824, or -2^30. The reason this loops
> again is that -n = -(-20^30) = -20^30......, still negative!
>
> This is obviously a bug - has it since been fixed? But more alarmingly -
> why is there no warning?
For what it's worth, you can have a look at "Overflow":
http://sebastien.ailleret.perso.cegetel.net/caml/
(I haven't tried it)
Martin
--
Martin Jambon, PhD
http://martin.jambon.free.fr
prev parent reply other threads:[~2006-12-07 21:14 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-07 18:32 Pal-Kristian Engstad
2006-12-07 19:19 ` [Caml-list] " Jonathan Roewen
2006-12-07 19:43 ` Mattias Engdegård
2006-12-07 20:02 ` Brian Hurt
2006-12-08 2:37 ` skaller
2006-12-08 11:09 ` Mattias Engdegård
2006-12-08 17:48 ` Jon Harrop
2006-12-08 18:20 ` Mattias Engdegård
2006-12-08 18:37 ` Brian Hurt
2006-12-09 2:03 ` skaller
2006-12-07 21:13 ` Martin Jambon [this message]
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