From: Joe Buck <Joe.Buck@synopsys.COM>
To: Falk Hueffner <falk@debian.org>
Cc: gcc@gcc.gnu.org
Subject: Re: Pointers in comparison expressions
Date: Wed, 13 Jul 2005 02:02:00 -0000 [thread overview]
Message-ID: <20050713020210.GB7538@synopsys.com> (raw)
In-Reply-To: <878y0bd2pd.fsf@debian.org>
On Wed, Jul 13, 2005 at 01:28:14AM +0200, Falk Hueffner wrote:
> Joe Buck <Joe.Buck@synopsys.COM> writes:
> > If you want to be pedantic, that's not portable; in particular, it
> > will break for some of the memory models used with 16-bit Windows
>
> You're missing my point; size_t was just an example, whoever does this
> will know what the correct type is for their system.
I'm afraid that my grey hairs give me an advantage here.
You're missing my point; *there is no correct size*!
In segmented memory models, the pointers are only offsets in the current
segment; casting them to any integer type you choose simply will not work.
Casting to size_t (or any other integral type large enough to hold the
pointer) never gives any advantage over comparing the pointers directly.
next prev parent reply other threads:[~2005-07-13 2:02 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-12 16:24 Mirco Lorenzoni
2005-07-12 16:32 ` Daniel Berlin
2005-07-12 16:53 ` Dave Korn
2005-07-12 21:00 ` Andreas Schwab
2005-07-12 21:42 ` Erik Trulsson
2005-07-12 22:09 ` Joe Buck
2005-07-12 22:28 ` Erik Trulsson
2005-07-12 22:38 ` Falk Hueffner
2005-07-12 23:17 ` Joe Buck
2005-07-12 23:28 ` Falk Hueffner
2005-07-13 2:02 ` Joe Buck [this message]
2005-07-13 21:42 ` Olivier Galibert
2005-07-12 23:27 ` Michael Meissner
2005-07-12 22:46 ` Joe Buck
2005-07-16 11:49 ` Vincent Lefevre
2005-07-17 16:55 ` Paul Koning
2005-07-18 1:49 ` Vincent Lefevre
2005-07-18 3:13 ` D. Hugh Redelmeier
2005-07-18 13:13 ` Paul Koning
2005-07-18 13:09 ` Paul Koning
2005-07-12 17:03 ` chris jefferson
2005-07-12 23:18 ` Michael Meissner
2005-07-22 23:20 ` Geoffrey Keating
2005-07-13 13:53 Morten Welinder
2005-07-24 1:13 Paul Schlie
2005-07-26 4:43 ` Geoff Keating
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