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From: guy@rlgvax.UUCP
Newsgroups: net.lang.c
Subject: Re: expressions and #if
Message-ID: <2104@rlgvax.UUCP>
Date: Sat, 14-Jul-84 14:44:31 EDT
Article-I.D.: rlgvax.2104
Posted: Sat Jul 14 14:44:31 1984
Date-Received: Mon, 16-Jul-84 05:16:53 EDT
References: <1836@sri-arpa.UUCP>
Organization: CCI Office Systems Group, Reston, VA
Lines: 9

"cpp" doesn't support "sizeof" in #if expressions; it would be nice, but
would also mean that "cpp" would have to swallow a good deal more of C's
grammar, would have to know what machine it was running on, and would have
to parse all "typedef" statements that passed by it - in effect, it would
have to absorb a good deal of the C compiler.  A C compiler with macro
expansion built into it might be better able to support "sizeof" in #if.

	Guy Harris
	{seismo,ihnp4,allegra}!rlgvax!guy