From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eric Abrahamsen Newsgroups: gmane.emacs.help Subject: Re: Making a regex string that matches ( Date: Thu, 10 Mar 2022 09:48:01 -0800 Message-ID: <87czititri.fsf@ericabrahamsen.net> References: <87y21hzxbs.fsf@zoho.eu> <87tuc5g61n.fsf@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="21405"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:tRokyeTEUcSgSS6dPkaWsgYXWQM= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Mar 10 18:57:31 2022 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nSN2Z-0005OM-DY for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 10 Mar 2022 18:57:31 +0100 Original-Received: from localhost ([::1]:52646 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nSN2Y-0000GU-9Q for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 10 Mar 2022 12:57:30 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:38782) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nSMvN-0000Ze-C5 for help-gnu-emacs@gnu.org; Thu, 10 Mar 2022 12:50:05 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:55754) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nSMvL-0008IA-H7 for help-gnu-emacs@gnu.org; Thu, 10 Mar 2022 12:50:05 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1nSMvK-0005kn-4p for help-gnu-emacs@gnu.org; Thu, 10 Mar 2022 18:50:02 +0100 X-Injected-Via-Gmane: http://gmane.org/ Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Thu, 10 Mar 2022 12:56:54 -0500 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 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-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:136433 Archived-At: goncholden writes: > ------- Original Message ------- > On Thursday, March 10th, 2022 at 3:51 PM, Robert Pluim wrote: >> > > > > > On Thu, 10 Mar 2022 15:39:03 +0100, Emanuel Berg via Users >> > list for the GNU Emacs text editor help-gnu-emacs@gnu.org said: >> >> Emanuel> angelomolina--- via Users list for the GNU Emacs text editor wrote: >> >> >> How can I make a regex string if I want to search for (. >> >> Emanuel> Uhm ... how much is a 50¢ stamp? >> >> Emanuel> (re-search-forward "(") >> >> And since youʼre searching for a literal '(', you can use >> >> `search-forward'. >> >> Robert > > Have come up with the following function. Would this be enough to count the number > oy opening parantheses in a region ? > > (defun bracketing-count (region-start region-end) > "Counts opening and closing bracketing marks. > Interactive functions enable them to be called using `M-x`" > (interactive "r") ; gets region start and end > > (message "Counting bracketing marks ...") > (save-excursion > (let (count) > (setq count 0) > (goto-char region-start) > > (while (and (< (point) region-end) > (search-forward "\(" region-end t)) > (setq count (1+ count))) )))) Not to detract from your achievement, but there's already a `count-matches' function, if you go back to using a regexp.