From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Marcin Borkowski Newsgroups: gmane.emacs.help Subject: Re: Lookarounds and recursion in Emacs regexes Date: Fri, 27 Jan 2023 19:12:52 +0100 Message-ID: <87h6wbeti3.fsf@mbork.pl> References: Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="29057"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: mu4e 1.1.0; emacs 29.0.50 Cc: help-gnu-emacs@gnu.org To: Evan Aad Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Jan 27 19:13:16 2023 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 1pLTDv-0007Ij-Up for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 27 Jan 2023 19:13:15 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pLTDh-0006Hh-6G; Fri, 27 Jan 2023 13:13:01 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pLTDg-0006HZ-4b for help-gnu-emacs@gnu.org; Fri, 27 Jan 2023 13:13:00 -0500 Original-Received: from mail.mojserwer.eu ([195.110.48.8]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pLTDe-0002dH-JA for help-gnu-emacs@gnu.org; Fri, 27 Jan 2023 13:12:59 -0500 Original-Received: from localhost (localhost [127.0.0.1]) by mail.mojserwer.eu (Postfix) with ESMTP id F24077B3A1E; Fri, 27 Jan 2023 19:12:56 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at mail.mojserwer.eu Original-Received: from mail.mojserwer.eu ([127.0.0.1]) by localhost (mail.mojserwer.eu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id pHeNCmplXABh; Fri, 27 Jan 2023 19:12:53 +0100 (CET) Original-Received: from localhost (83.21.46.142.ipv4.supernova.orange.pl [83.21.46.142]) by mail.mojserwer.eu (Postfix) with ESMTPSA id 073707E5DA2; Fri, 27 Jan 2023 19:12:53 +0100 (CET) In-reply-to: Received-SPF: pass client-ip=195.110.48.8; envelope-from=mbork@mbork.pl; helo=mail.mojserwer.eu X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:142539 Archived-At: On 2023-01-27, at 15:11, Evan Aad wrote: > Are there plans to extend Emacs regexes with lookarounds? With > recursion? If so, when are these enhancements expected? > > Other text editors, such as Notepad++, EditPad, and Sublime Text > natively use regex flavors that support lookarounds and recursion. The > same applies to popular programming languages such as C#, Java, Perl, > and Python. > > Compared with platforms whose regexes support lookarounds and > recursion, Emacs regexes have limited power, expressivity, and ease of > use. True, but what they don't have is Elisp;-), which makes up for the limited regexen. Best, -- Marcin Borkowski http://mbork.pl