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Path: utzoo!mnetor!uunet!husc6!necntc!ima!haddock!karl
From: karl@haddock.ISC.COM (Karl Heuer)
Newsgroups: comp.lang.c
Subject: Re: Unstylish #defines ??
Message-ID: <1251@haddock.ISC.COM>
Date: Fri, 25-Sep-87 15:57:45 EDT
Article-I.D.: haddock.1251
Posted: Fri Sep 25 15:57:45 1987
Date-Received: Sun, 27-Sep-87 03:03:16 EDT
References: <325@petro.UUCP> <763@phoenix.PRINCETON.EDU>
Reply-To: karl@haddock.ima.isc.com (Karl Heuer)
Distribution: na
Organization: Interactive Systems, Boston
Lines: 14
Keywords: quotes, files
Summary: quibble

In article <763@phoenix.PRINCETON.EDU> rjchen@phoenix.UUCP (Raymond Juimong Chen) writes:
>This expands to
>stream = fopen("/usr/me" "/afile", "r");
>
>which the preprocessor mushes together to make
>stream = fopen("usr/me/afile", "r")

A minor quibble here.  (No, not the missing slash.)  In compilers that
maintain the traditional separation of cpp from compiler proper, the string
pasting is likely to be done in the lexer, not the preprocessor.  Otherwise
the preprocessor has to avoid situations like ("\12" "3"), for which the naive
answer ("\123") is wrong.

Karl W. Z. Heuer (ima!haddock!karl or karl@haddock.isc.com), The Walking Lint