From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Thorsten Jolitz Newsgroups: gmane.emacs.help Subject: Re: regexp question: match anything but not a group? Date: Thu, 03 Apr 2014 21:36:01 +0200 Message-ID: <874n2ai4ta.fsf@gmail.com> References: <87zjk4louc.fsf@gmail.com> <533BA65E.3030408@easy-emacs.de> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1396553901 14005 80.91.229.3 (3 Apr 2014 19:38:21 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 3 Apr 2014 19:38:21 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Thu Apr 03 21:38:14 2014 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WVnSm-0004gI-1h for geh-help-gnu-emacs@m.gmane.org; Thu, 03 Apr 2014 21:38:12 +0200 Original-Received: from localhost ([::1]:45981 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WVnSl-0003dj-Mw for geh-help-gnu-emacs@m.gmane.org; Thu, 03 Apr 2014 15:38:11 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:39022) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WVnSO-0003Xj-HQ for help-gnu-emacs@gnu.org; Thu, 03 Apr 2014 15:37:54 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WVnSH-0005mv-KY for help-gnu-emacs@gnu.org; Thu, 03 Apr 2014 15:37:48 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:43150) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WVnPk-0004bN-QF for help-gnu-emacs@gnu.org; Thu, 03 Apr 2014 15:35:04 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1WVnPj-0002EV-PX for help-gnu-emacs@gnu.org; Thu, 03 Apr 2014 21:35:03 +0200 Original-Received: from g231227208.adsl.alicedsl.de ([92.231.227.208]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 03 Apr 2014 21:35:03 +0200 Original-Received: from tjolitz by g231227208.adsl.alicedsl.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 03 Apr 2014 21:35:03 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 37 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: g231227208.adsl.alicedsl.de User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) Cancel-Lock: sha1:iYz0pw80cxgh/1DoTXn2d7E5PFw= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:96952 Archived-At: Andreas Röhler writes: > Am 01.04.2014 23:30, schrieb Thorsten Jolitz: >> >> Hi List, >> >> how can I write a regexp that acts like e.g. >> >> ,------ >> | ".*?" >> `------ >> > > BTW looks wrong. .* might much nothing, if non-greedy it remains > nothing (?) But it still seems valid to protect against greedyness? ,--------------------------------------------------------------------- | '*?', '+?', '??' | These are "non-greedy" variants of the operators '*', '+' and '? | '. Where those operators match the largest possible substring | (consistent with matching the entire containing expression), the | non-greedy variants match the smallest possible substring | (consistent with matching the entire containing expression). | | For example, the regular expression 'c[ad]*a' when applied to | the string 'cdaaada' matches the whole string; but the regular | expression 'c[ad]*?a', applied to that same string, matches just | 'cda'. (The smallest possible match here for '[ad]*?' that | permits the whole expression to match is 'd'.) `--------------------------------------------------------------------- -- cheers, Thorsten