Path: utzoo!utgpu!watserv1!watmath!att!dptg!ulysses!andante!alice!ark
From: ark@alice.UUCP (Andrew Koenig)
Newsgroups: comp.lang.c
Subject: Re: Casting pointers
Keywords: cast
Message-ID: <11072@alice.UUCP>
Date: 20 Jul 90 13:58:11 GMT
References: <1614@ghost.stsci.edu>
Organization: AT&T Bell Laboratories, Liberty Corner NJ
Lines: 12

In article <1614@ghost.stsci.edu>, davids@stsci.EDU (David Silberberg) writes:

> Does anyone know if the following cast operation will perform correctly?

> 	(char *)ptr += num_chars;

This is not legal C -- the result of a cast is not an lvalue -- so the
`correct' thing to do is to issue a diagnostic message during compilation.
Some implementations do this, others don't.
-- 
				--Andrew Koenig
				  ark@europa.att.com