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From: david@sun.uucp (David DiGiacomo)
Newsgroups: net.lang.c
Subject: Re: Casting a postdecrement operand
Message-ID: <3925@sun.uucp>
Date: Wed, 4-Jun-86 16:00:39 EDT
Article-I.D.: sun.3925
Posted: Wed Jun  4 16:00:39 1986
Date-Received: Fri, 6-Jun-86 04:49:26 EDT
References: <114@romp.UUCP> <2842@utcsri.UUCP> <378@dg_rtp.UUCP> <1764@umcp-cs.UUCP>
Organization: Sun Microsystems, Inc.
Lines: 26

In article <1764@umcp-cs.UUCP> chris@maryland.UUCP (Chris Torek) writes:
>Incidentally, if you really *do* want to take a pointer `p' to
>type `x', but treat it as a pointer to type `y', the construct
>
>	*(y **)&p
>
>works (as long as `p' is addressable).  Thus
>
>	((struct abc *)cbap)++;
>
>is not legal, but
>
>	(*(struct abc **)&cbap)++;
>
>is (again, if cbap is addressable).  What it means is machine
>dependent!

This is disgusting... why not use

	cbap = (struct cba *) ((caddr_t) cbap + sizeof(struct abc));

?

-- 
David DiGiacomo  {decvax, ihnp4, ucbvax}!sun!david  david@sun.arpa
Sun Microsystems, Mt. View, CA  (415) 960-7495