Re: pointer comparisons in dpANS C

Article View: comp.std.c

Article #5390

#5390

From: Doug Gwyn
Date: Sat, 22 Oct 1988 20:05

10 lines
1142 bytes

In article <1988Oct21.143640.10468@ateng.ateng.com> chip@ateng.ateng.com (Chip Salzenberg) writes:
>According to chris@mimsy.UUCP (Chris Torek):
>>Every address returned by malloc must compare as not distinct from
>>every other address, lest this routine delete the wrong object.

In case I misled anyone by a previous posting, (in)equality comparison
of pointers (having appropriate types) is supposed to work according to
the proposed ANS for C even when the pointers are not into the same
object.  It is the order-relational comparison that requires that the
pointers be into the same object.

Technical Details

Message-ID: <8729@smoke.BRL.MIL>

Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!lll-tis!ames!ll-xn!husc6!cmcl2!adm!smoke!gwyn

References:

<1988Oct11.143728.28627@gpu.utcs.toronto.edu> <6777@chinet.chi.il.us> <8696@smoke.ARPA> <14061@mimsy.UUCP> <1988Oct21.143640.10468@ateng.ateng.com>

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!lll-tis!ames!ll-xn!husc6!cmcl2!adm!smoke!gwyn
From: gwyn@smoke.BRL.MIL (Doug Gwyn )
Newsgroups: comp.std.c
Subject: Re: pointer comparisons in dpANS C
Message-ID: <8729@smoke.BRL.MIL>
Date: 22 Oct 88 20:05:47 GMT
References: <1988Oct11.143728.28627@gpu.utcs.toronto.edu> <6777@chinet.chi.il.us> <8696@smoke.ARPA> <14061@mimsy.UUCP> <1988Oct21.143640.10468@ateng.ateng.com>
Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 9

Reply to Parent Message