From -4446391063871447087 X-Google-Thread: f78e5,6978327f896d5d5b X-Google-Attributes: gidf78e5,public X-Google-Language: ENGLISH,ASCII-7-bit Return-Path: X-Authentication-Warning: mulga.cs.mu.OZ.AU: fjh set sender to devnull@stump.algebra.com using -f Path: g2news1.google.com!news1.google.com!news.glorb.com!cyclone.bc.net!news.alt.net!comp-std-cpp-robomod!not-for-mail X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) Delivered-To: std-c++@ucar.edu X-Authentication-Warning: serv3.gc.dca.giganews.com: news set sender to poster@giganews.com using -f NNTP-Posting-Date: Mon, 28 Jun 2004 19:53:50 -0500 From: "Paul Mensonides" References: <607f883e.0406251028.5412fc80@posting.google.com> <2VIDc.8800$DT5.5297@nwrddc03.gnilink.net> Subject: Re: What is the use of the null directive # ? X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 Message-ID: <7ZednQfP8PsCIH3dRVn-uA@comcast.com> X-Trace: sv3-zuaGSprE9YzIadvJsJvzqJ6t1XtPqvjNluL0965gFXJmQQyLic2dA2YvxKGJErhasMMcmskCz9tjuAz!rnzn6+QB6VVCvRoxUnAWfrkWAYKz24zOWSTxtN5kIY+Jxf6Bv62rASg/yshnPQ== X-Complaints-To: abuse@comcast.net X-DMCA-Complaints-To: dmca@comcast.net X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.1 Newsgroups: comp.std.c++ X-Spamscanner: mailbox5.ucsd.edu (v1.4 May 20 2004 13:55:33, 0.7/5.0 2.63) X-MailScanner: PASSED (v1.2.8 50882 i5T0rphl062876 mailbox5.ucsd.edu) X-Spam-Checker-Version: SpamAssassin 2.60-mulga_r1 (1.212-2003-09-23-exp) on mulga.cs.mu.OZ.AU X-Spam-Status: No, hits=-4.2 required=5.2 tests=BAYES_00,PRIORITY_NO_NAME autolearn=no version=2.60-mulga_r1 Approved: Fergus Henderson , moderator of comp.std.c++ Date: Tue, 29 Jun 2004 16:43:45 CST Lines: 36 Xref: g2news1.google.com comp.std.c++:1068 "Francis Glassborow" wrote in message news:X0YaTxJvHA4AFwbF@robinton.demon.co.uk... > In article <2VIDc.8800$DT5.5297@nwrddc03.gnilink.net>, P.J. Plauger > writes > >I have trouble reading it that way. Where in the grammar > > > >: # new-line > > > >is there wiggle room to add the word 'packed', or any other > >non-whitespace thingy? > > You are right. I completely misread the sub-clause. Which actually says > that an empty preprocessor directive does nothing. That may seem obvious > to some but most of us here know that such things have to be specified > else they invoke undefined behaviour. > > My apologies for carelessly misreading (i.e. not noting the use of font > in the quoted text) You aren't too far off, Francis. The C99 standard introduces another production # non-directive which covers any case like #packed where the name after # is not a standard directive name. Regards, Paul Mensonides --- [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ] [ --- Please see the FAQ before posting. --- ] [ FAQ: http://www.jamesd.demon.co.uk/csc/faq.html ]