Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cbmvax!uunet!ceco!garry
From: garry@ceco.ceco.com (Garry Garrett)
Newsgroups: comp.lang.c
Subject: Re: Preprocessor question (is gcc standard)?
Message-ID: <419@ceco.ceco.com>
Date: 1 Mar 91 02:01:37 GMT
References: <7654@jhunix.HCF.JHU.EDU> <1991Feb27.155100.21972@athena.mit.edu>
Distribution: usa
Organization: Commonwealth Edison Co., Chicago, IL
Lines: 26

In article <1991Feb27.155100.21972@athena.mit.edu>, jik@athena.mit.edu (Jonathan I. Kamens) writes:
> In article <7654@jhunix.HCF.JHU.EDU>, barrett@jhunix.HCF.JHU.EDU (Dan Barrett) writes:
* |> 	GCC's preprocessor doesn't like this code:
* |> 
* |> 		#include <ctype.h>
* |> 		#define ARGS		(x)
* |> 
* |> 		main()
* |> 		{
* |> 			...	isalpha ARGS ...
* |> 		}
* 
*   K&Rv2 says that an invocation of a macro with arguments must be the name of
* the macro, followed by optional white space, followed by '('.  It doesn't say
* that the '(' is allowed to be part of another macro that has been expanded.
* 

	Perhaps the problem is one wher GCC does not follow the standard.
Check to see that 
                 #define ARGS            (x)

is not interpreted as a macro of the form

		#define ARGS(x) ...

I know that it, shouldn't, but perhaps GCC is non-standard.