Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uflorida!novavax!twwells!bill
From: bill@twwells.uucp (T. William Wells)
Newsgroups: comp.lang.c
Subject: Re: arithmetic on void pointers
Message-ID: <754@twwells.uucp>
Date: 7 Mar 89 05:14:00 GMT
References: <1527@ncar.ucar.edu>
Reply-To: bill@twwells.UUCP (T. William Wells)
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In article <1527@ncar.ucar.edu> russ@groucho.UUCP (Russ Rew) writes:
: GNU C supports arithmetic on void pointers, but the manual implies
: that this is an extension to the C language.  I could find no
: prohibition on arithmetic on void pointers in K&R second edition.
: What does the latest dpANS document say?  Is it legal to increment a
: variable of type void* ?

When the dpANS talks about pointer arithmetic, it speaks of pointers
to an object type.  Void is an incomplete type, a pointer to void is
thus not a pointer to an object type, so a void pointer can't be used
in pointer arithmetic.

---
Bill
{ uunet | novavax } !twwells!bill
(BTW, I'm going to be looking for a new job sometime in the next
few months.  If you know of a good one, do send me e-mail.)