Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!sdrc!scjones
From: scjones@sdrc.UUCP (Larry Jones)
Newsgroups: comp.std.c
Subject: Re: Question about ANSI preprocessor
Message-ID: <839@sdrc.UUCP>
Date: 28 Sep 89 22:30:57 GMT
References: <10879@riks.csl.sony.co.jp>
Organization: Structural Dynamics Research Corp., Cincinnati
Lines: 30

In article <10879@riks.csl.sony.co.jp>, diamond@csl.sony.co.jp (Norman Diamond) writes:
> According to the ANSI standard, does the following code cause
> expansion of the preprocessor macro "huh"?
> 
> #define huh(x) (abc + (x))
> 
> y = huh
> #if 0
> 	, a, lot, of, garbage
> #endif
> (z);

No.  Section 3.8.3 (Macro replacement) talks about function-like
macros and says:

	Each subsequent instance of the function-like macro name
	followed by a ( as the next preprocessing token
	introduces the sequence of proprocessing tokens that is
	replaced by the replacement list in the definition (an
	invocation of the macro).

In this case, the preprocessing token following the macro name is
"#" rather than "(", so it is not eligable for expansion.
----
Larry Jones                         UUCP: uunet!sdrc!scjones
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