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From: faustus@ucbcad.UUCP (Wayne A. Christopher)
Newsgroups: net.lang.c
Subject: Re: Re: Question of Ignorance
Message-ID: <248@ucbcad.UUCP>
Date: Thu, 16-May-85 18:28:47 EDT
Article-I.D.: ucbcad.248
Posted: Thu May 16 18:28:47 1985
Date-Received: Sat, 18-May-85 01:24:25 EDT
References: <198@unccvax.UUCP>, <1427@bbncca.ARPA> <5590@utzoo.UUCP> <480@bbnccv.UUCP>
Organization: UC Berkeley CAD Group, Berkeley, CA
Lines: 14

This discussion has brought up another point -- somebody posted an example
where he casted a lhs, and somebody pointed out that you can't do that.
What I am wondering is, why can't you? There seem to be no semantic problems
involved, and it can be very useful for something like:

#define FREE(ptr)	free(char *) ptr); (char *) (ptr) = (char *) -1;

I have wanted to do this at various times, when I don't want to have
to always cast the argument to FREE and I don't ever want to reference
freed data accidentally... I couldn't think of a decent way to do this
that wouldn't cause compiler warnings about pointers being assigned to
the int -1...

	Wayne