From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: bojohan+news@dd.chalmers.se (Johan =?utf-8?Q?Bockg=C3=A5rd?=) Newsgroups: gmane.emacs.devel Subject: Re: What is the difference between looking-at and an anchored search? Date: Thu, 17 Jul 2008 14:29:25 +0200 Message-ID: References: <487F2985.9080103@gmail.com> 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 1216297816 6784 80.91.229.12 (17 Jul 2008 12:30:16 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 17 Jul 2008 12:30:16 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Jul 17 14:30:54 2008 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1KJSdE-0007PW-2Q for ged-emacs-devel@m.gmane.org; Thu, 17 Jul 2008 14:30:48 +0200 Original-Received: from localhost ([127.0.0.1]:43807 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KJScL-0000Uc-EP for ged-emacs-devel@m.gmane.org; Thu, 17 Jul 2008 08:29:53 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1KJSc6-0000Pf-8p for emacs-devel@gnu.org; Thu, 17 Jul 2008 08:29:38 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1KJSc5-0000Os-Ek for emacs-devel@gnu.org; Thu, 17 Jul 2008 08:29:37 -0400 Original-Received: from [199.232.76.173] (port=42731 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KJSc4-0000Ob-WF for emacs-devel@gnu.org; Thu, 17 Jul 2008 08:29:37 -0400 Original-Received: from main.gmane.org ([80.91.229.2]:45253 helo=ciao.gmane.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1KJSc2-00010P-0P for emacs-devel@gnu.org; Thu, 17 Jul 2008 08:29:35 -0400 Original-Received: from list by ciao.gmane.org with local (Exim 4.43) id 1KJSc0-0005a9-35 for emacs-devel@gnu.org; Thu, 17 Jul 2008 12:29:32 +0000 Original-Received: from remote5.student.chalmers.se ([129.16.29.83]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 17 Jul 2008 12:29:32 +0000 Original-Received: from bojohan+news by remote5.student.chalmers.se with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 17 Jul 2008 12:29:32 +0000 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: emacs-devel@gnu.org Original-Lines: 19 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: remote5.student.chalmers.se Mail-Copies-To: never User-Agent: Gnus/5.110009 (No Gnus v0.9) Emacs/23.0.60 (gnu/linux) Cancel-Lock: sha1:mfM9kvUbulVPXT07aTrJaRYP6JQ= X-detected-kernel: by monty-python.gnu.org: Linux 2.6, seldom 2.4 (older, 4) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:100881 Archived-At: "Lennart Borgman" writes: >> If you want to reject matches that extend past some point, just do >> something like: >> >> (and (looking-at REGEXP) (<= (match-end 0) BOUND)) > > > Thanks Miles, > > Yes, that is one possibility. But then perhaps I would assume that > re-search-forward better might optimize that search since it can (in > theory) cut off the searching at BOUND. In the case I am looking at > performance is important. You can try narrowing the buffer. -- Johan Bockgård