From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Tim X Newsgroups: gmane.emacs.help Subject: Re: Why are RegExps never working? Date: Fri, 16 Nov 2007 16:15:40 +1100 Organization: Posted via Supernews, http://www.supernews.com Message-ID: <87oddu4vpf.fsf@lion.rapttech.com.au> References: <87lk94oozv.fsf@kamaloka.dhatu> <87abpkolme.fsf@kamaloka.dhatu> <873avbyq9l.fsf@kobe.laptop> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1195191694 19396 80.91.229.12 (16 Nov 2007 05:41:34 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 16 Nov 2007 05:41:34 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Nov 16 06:41:40 2007 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1IstxT-0003wZ-5Z for geh-help-gnu-emacs@m.gmane.org; Fri, 16 Nov 2007 06:41:39 +0100 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1IstxG-0000G4-D9 for geh-help-gnu-emacs@m.gmane.org; Fri, 16 Nov 2007 00:41:26 -0500 Original-Path: shelby.stanford.edu!headwall.stanford.edu!newsfeed.news2me.com!newsfeed.icl.net!newsfeed.fjserv.net!newsfeed.freenet.de!border-2.ams.xsnews.nl!feed.xsnews.nl!border-1.ams.xsnews.nl!sn-xt-ams-06!sn-xt-ams-08!sn-post-ams-02!sn-post-sjc-01!supernews.com!corp.supernews.com!not-for-mail Original-Newsgroups: gnu.emacs.help User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/23.0.50 (gnu/linux) Cancel-Lock: sha1:MO4f2vWV9r3CNQOrk+EeBU97JIQ= Original-X-Complaints-To: abuse@supernews.com Original-Lines: 25 Original-Xref: shelby.stanford.edu gnu.emacs.help:153852 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:49280 Archived-At: bojohan+news@dd.chalmers.se (Johan Bockgård) writes: > Giorgos Keramidas writes: > >> There's a minor 'catch' here, which may prove interesting. The >> `character-classes' supported by the regexp engine of Emacs >> consider the end of a line a [[:space:]] character > > There are several modes where this is not true, including Lisp and C. In > these modes newlines have `endcomment' syntax. > isn't this controlled by the syntax table? As you can modify the syntax table, you can modify how such things work. I seem to remember seeing a bit of elisp that did this to make the regexp easier to write when needing to do re-search. from memory, I think it temporarily changed the newline syntax entry in the local syntax table, performed the search and since this was all done within a saved context, everything is restored afterwards. I remember it because at the time I remember thinking "thats a neat little trick to simplify the regexp" Tim -- tcross (at) rapttech dot com dot au