Article View: comp.std.c
Article #859Re: null pointers [joke?] (was: commom malloc/free practice ...)
From: David Adrien Tanguay
Date: Fri, 27 Oct 1989 22:19
Date: Fri, 27 Oct 1989 22:19
19 lines
1153 bytes
1153 bytes
In article <872.254895b5@csc.anu.oz> bdm659@csc.anu.oz writes: : Section 3.2.2.3 (on the result of casting 0 to a pointer type): : : "Such a pointer, called a null pointer, is guaranteed not to : point to any object or function." : : Section 3.3.9 (on pointer equality): : : "If two pointers to object or incomplete types compare equal, : they point to the same object." : :From these two rules, it logically follows that (int*)0 != (int*)0 . (int *) 0 is not a pointer to an object, so section 3.3.9 doesn't come into play. :Brendan McKay. bdm@anucsd.oz or bdm@anucsd.oz.au (via uunet.uu.net) David Tanguay
Technical Details
Message-ID:
<30809@watmath.waterloo.edu>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!watmath!datanguayReferences:
<11380@smoke.BRL.MIL> <8952@goofy.megatest.UUCP> <872.254895b5@csc.anu.oz>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!watmath!datanguay From: datanguay@watmath.waterloo.edu (David Adrien Tanguay) Newsgroups: comp.std.c Subject: Re: null pointers [joke?] (was: commom malloc/free practice ...) Message-ID: <30809@watmath.waterloo.edu> Date: 27 Oct 89 22:19:27 GMT References: <11380@smoke.BRL.MIL> <8952@goofy.megatest.UUCP> <872.254895b5@csc.anu.oz> Reply-To: datanguay@watmath.waterloo.edu (David Adrien Tanguay) Organization: U. of Waterloo, Ontario Lines: 21