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From: bhoughto@hopi.intel.com (Blair P. Houghton)
Newsgroups: comp.lang.c
Subject: Re: Do nil pointers convert to nil pointers?
Message-ID: <3132@inews.intel.com>
Date: 20 Mar 91 01:47:54 GMT
References: <1991Mar19.234219.22867@cbnewsj.att.com>
Sender: news@inews.intel.com
Organization: Intel Corp, Chandler, AZ
Lines: 16

People have been asking ANSI-questions like they're writing
a test suite for the standard...

In article <1991Mar19.234219.22867@cbnewsj.att.com> asd@cbnewsj.att.com (Adam S. Denton) writes:
[...for some defined types T, T1, and T2...]
>does ANSI guarantee that (void *)0 compares equal to (void *)(T *)0,
>or is this just wishful thinking on my part?
>On a related note, can anything be said for (T1 *)0 vs. (T1 *)(T2 *)0?
>(Not that converting arbitrary pointers is an acceptable practice... :-))

"Two null pointers, converted through possibly different sequences
of casts to pointer types, shall compare equal."
(ANSI X3.159-1989, sec. 3.2.2.3, p. 38, ll. 5-6)

				--Blair
				  "Works for me."