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From: ken@turtlevax.UUCP (Ken Turkowski)
Newsgroups: net.micro.68k,net.lang.c
Subject: Re: Question of Ignorance
Message-ID: <762@turtlevax.UUCP>
Date: Tue, 14-May-85 12:32:16 EDT
Article-I.D.: turtleva.762
Posted: Tue May 14 12:32:16 1985
Date-Received: Wed, 15-May-85 02:03:26 EDT
References: <198@unccvax.UUCP> <1427@bbncca.ARPA> <5590@utzoo.UUCP>
Reply-To: ken@turtlevax.UUCP (Ken Turkowski)
Organization: CADLINC, Inc. @ Menlo Park, CA
Lines: 18
Xref: watmath net.micro.68k:757 net.lang.c:5213

In article <5590@utzoo.UUCP> henry@utzoo.UUCP (Henry Spencer) writes:
> > ... I recommend using one of the two constructs
> > 
> >     ( longptr == (long *)32 )
> > or  ( (int)longptr == 32 )
> > 
> > which are guaranteed to do what you want ...
>
>Argh, WRONG!!  Turn that "(int)" into "(long)" and I might agree.  You
>have no guarantees that an int is long enough to hold a pointer.

Arghh!  Wrong again.  You can't cast an lvalue, so that the second option
is not available.  You MUST say		longptr = (long *)32;
-- 

Ken Turkowski @ CADLINC, Menlo Park, CA
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