From 2184048829684933521 X-Google-Thread: f78e5,6978327f896d5d5b X-Google-Attributes: gidf78e5,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news2.google.com!proxad.net!proxad.net!194.159.246.34.MISMATCH!kibo.news.demon.net!mutlu.news.demon.net!demon!mail2news.demon.co.uk!devnull From: barmar@alum.mit.edu (Barry Margolin) Newsgroups: comp.std.c++ Subject: Re: What is the use of the null directive # ? Date: Sun, 27 Jun 2004 05:48:16 +0000 (UTC) Organization: Looking for work Lines: 38 Approved: fjh@cs.mu.oz.au (Fergus Henderson , moderator of comp.std.c++) Message-ID: References: <607f883e.0406251028.5412fc80@posting.google.com> X-Trace: mail2news.demon.co.uk 1088315296 7650 10.0.0.1 (27 Jun 2004 05:48:16 GMT) X-Complaints-To: abuse@demon.net NNTP-Posting-Date: Sun, 27 Jun 2004 05:48:16 +0000 (UTC) X-Received: from mulga.cs.mu.oz.au ([128.250.1.22]) by news.demon.co.uk with esmtp (Exim 4.12) id 1BeSWV-0001zF-00 for mail2news@news.news.demon.net; Sun, 27 Jun 2004 05:48:15 +0000 X-Received: from mulga.cs.mu.OZ.AU (localhost [127.0.0.1]) by mulga.cs.mu.OZ.AU with ESMTP id i5R5mArd001358; Sun, 27 Jun 2004 15:48:10 +1000 (EST) X-Received: (from fjh@localhost) by mulga.cs.mu.OZ.AU (8.12.10+Sun/8.12.9/Submit) id i5R5m97e001347; Sun, 27 Jun 2004 15:48:09 +1000 (EST) X-Authentication-Warning: mulga.cs.mu.OZ.AU: fjh set sender to devnull@stump.algebra.com using -f X-Path: comp-std-cpp-robomod!not-for-mail X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) X-Delivered-To: std-c++@ucar.edu X-Authentication-Warning: serv1.gc.dca.giganews.com: news set sender to poster@giganews.com using -f X-NNTP-Posting-Date: Sat, 26 Jun 2004 21:09:55 -0500 X-Mail-Copies-To: nobody X-User-Agent: MT-NewsWatcher/3.4 (PPC Mac OS X) X-Copies-To: never 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 X-Newsgroups: comp.std.c++ X-Spamscanner: mailbox5.ucsd.edu (v1.4 May 20 2004 13:55:33, 1.1/5.0 2.63) X-MailScanner: PASSED (v1.2.8 78987 i5R29vuo083981 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-Level: X-Spam-Status: No, hits=-4.7 required=5.2 tests=AWL,BAYES_00, MAILTO_TO_SPAM_ADDR autolearn=no version=2.60-mulga_r1 Xref: g2news1.google.com comp.std.c++:1039 In article , francis@robinton.demon.co.uk (Francis Glassborow) wrote: > In article <607f883e.0406251028.5412fc80@posting.google.com>, Prateek R > Karandikar writes > >What is the use of the null-directive # ? > > > > > > 16.7 Null directive [cpp.null] > >1 A preprocessing directive of the form > > # new-line > > has no effect. > > > > It allows implementors to add directives as extensions without having > impact on the portability of code using them. All it says is that the line: # is ignored. How does that allow an implementor to add something like: #foobar ? -- Barry Margolin, barmar@alum.mit.edu Arlington, MA *** PLEASE post questions in newsgroups, not directly to me *** --- [ 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 ]