Path: utzoo!mnetor!uunet!lll-winken!lll-tis!ames!mailrus!tut.cis.ohio-state.edu!bloom-beacon!mcgill-vision!mouse
From: mouse@mcgill-vision.UUCP (der Mouse)
Newsgroups: comp.lang.c
Subject: Re: Macro parameters getting substituted into strings
Message-ID: <1043@mcgill-vision.UUCP>
Date: 12 Apr 88 08:27:49 GMT
References: <11879@brl-adm.ARPA> <4099@hoptoad.uucp> <7309@brl-smoke.ARPA> <3222@haddock.ISC.COM>
Organization: McGill University, Montreal
Lines: 17

In article <3222@haddock.ISC.COM>, karl@haddock.ISC.COM (Karl Heuer) writes:
> In article <8035@elsie.UUCP> ado@elsie.UUCP (Arthur David Olson) writes:
>>	#define LETR_a	'a'	[ditto for all of 'a'..'z', 'A'..'Z']
>>	#define CTRL(c)	((LETR_ ## c) & 037)
> Since you have to edit the source file anyway, why don't you just do
> it right in the first place?
> 	1,$s/CTRL(\(.\))/CTRL('\1')/g
> 	/^#define CTRL/s/.*/#define CTRL(c) ((c) & 037)/

Because there is no "the" source file.  There may be many source files
involved.  Arthur's fix involves changing only the file in which CTRL
is defined; your fix invovles changing not only that file but also all
files which use it.  This may be impractical or even impossible.

					der Mouse

			uucp: mouse@mcgill-vision.uucp
			arpa: mouse@larry.mcrcim.mcgill.edu