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From: gwyn@smoke.brl.mil (Doug Gwyn)
Newsgroups: comp.lang.c
Subject: Re: Is #define THING -10 completely safe?
Message-ID: <15005@smoke.brl.mil>
Date: 28 Jan 91 20:51:44 GMT
References: <1991Jan27.233142.28302@watdragon.waterloo.edu> <14999@smoke.brl.mil> <745@caslon.cs.arizona.edu>
Organization: U.S. Army Ballistic Research Laboratory, APG, MD.
Lines: 9

In article <745@caslon.cs.arizona.edu> dave@cs.arizona.edu (Dave P. Schaumann) writes:
>If Colin's interpretation is wrong, what *is* happening?

What I assumed Colin was blaming the difference on was the rewrite rule,
which is not the source of the difference.  -10[p] and (-10)[p] are not
the same due to [] having higher precedence than -.  Colin's is another
(this time strictly conforming) example illustrating that the parentheses
in the macro definition DO matter.  If that's what he intended to say,
I apologize for misunderstanding.