Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!haven!adm!smoke!gwyn
From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.lang.c
Subject: Re: Standard Clarification
Message-ID: <11374@smoke.BRL.MIL>
Date: 21 Oct 89 23:47:52 GMT
References: <20974@gryphon.COM> <1150@crdos1.crd.ge.COM> <23218@cup.portal.com>
Reply-To: gwyn@brl.arpa (Doug Gwyn)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 13

In article <23218@cup.portal.com> Tim_CDC_Roberts@cup.portal.com writes:
>    #define d define
>    #d a include
>Does the standard require that this construct should compile correctly?

No, it requires that a diagnostic be issued.

>Isn't the preprocessor legally and morally bound to recursively
>substitute macros, at least until a cycle is found?

Yes; I suspect in the case you reported the compiler failed to look
beyond the replacement buffer for the () necessary for the getchar()
expansion to be triggered.  That's a bug.