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From: ado@elsie.UUCP
Newsgroups: net.lang.c
Subject: Re: Preprocessor Trickery
Message-ID: <1014@elsie.UUCP>
Date: Wed, 11-Jul-84 10:48:15 EDT
Article-I.D.: elsie.1014
Posted: Wed Jul 11 10:48:15 1984
Date-Received: Sat, 14-Jul-84 01:25:20 EDT
References: <199@haddock.UUCP>
Organization: NIH-LEC, Bethesda, MD
Lines: 19

>	For concatenating strings at preprocessor time, try this:
>
>	#define Ident(xxx) xxx
>
>	#define concat(a,b) Ident(a)b
>
>	It should always work. . .

"Always"?  How about if either "a" or "b" is "__LINE__"?
Try typing this to see what happens:
	cc -E -
	#define Ident(xxx) xxx
	#define concat(a,b) Ident(a)b
	__LINE__
	concat(__LINE__,__LINE__)

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