Path: utzoo!attcan!uunet!snorkelwacker!spdcc!ima!haddock!karl
From: karl@haddock.ima.isc.com (Karl Heuer)
Newsgroups: comp.lang.c
Subject: Re: Commas in macro arguments
Message-ID: <16439@haddock.ima.isc.com>
Date: 11 Apr 90 16:46:22 GMT
References: <1990Mar22.203048.18491@dde.dk> <1990Mar23.164301.14975@utzoo.uucp> <T9H20-9ggpc2@ficc.uu.net> <246@samna.UUCP> <4665@jhunix.HC <701@mwtech.UUCP> <MCDANIEL.90Apr10154614@orenda.amara.uucp>
Reply-To: karl@haddock.ima.isc.com (Karl Heuer)
Organization: Interactive Systems, Cambridge, MA 02138-5302
Lines: 13

In article <MCDANIEL.90Apr10154614@orenda.amara.uucp> mcdaniel@amara.uucp (Tim McDaniel) writes:
>
>   esp_003@jhunix.UUCP (Stdnt003) writes:
>   >#define	call(a, b)	a ## b		/* (See K&R for details) */
>
>[This isn't legal, since `##' is expecting to produce a valid token.]

That is correct.  However, in this case there was no reason to use the paste
operator anyway.  The simpler construct
	#define	call(a, b) a b
does what Stdnt003 intended.

Karl W. Z. Heuer (karl@ima.ima.isc.com or harvard!ima!karl), The Walking Lint