From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Helmut Eller Newsgroups: gmane.emacs.devel Subject: Re: Ugly regexps Date: Wed, 03 Mar 2021 08:09:17 +0100 Message-ID: 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="6048"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: emacs-devel@gnu.org Cancel-Lock: sha1:NHvSYKRCv6ivV2R6cX/0BUY0Pn0= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Wed Mar 03 08:18:29 2021 Return-path: Envelope-to: ged-emacs-devel@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 1lHLm9-0001Sn-R1 for ged-emacs-devel@m.gmane-mx.org; Wed, 03 Mar 2021 08:18:29 +0100 Original-Received: from localhost ([::1]:60730 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lHLm7-0006TG-Jy for ged-emacs-devel@m.gmane-mx.org; Wed, 03 Mar 2021 02:18:28 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:51330) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lHLdN-0007wb-Hh for emacs-devel@gnu.org; Wed, 03 Mar 2021 02:09:25 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:42052) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lHLdM-000152-86 for emacs-devel@gnu.org; Wed, 03 Mar 2021 02:09:25 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1lHLdJ-0001vx-BG for emacs-devel@gnu.org; Wed, 03 Mar 2021 08:09:21 +0100 X-Injected-Via-Gmane: http://gmane.org/ Received-SPF: pass client-ip=116.202.254.214; envelope-from=ged-emacs-devel@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: 5 X-Spam_score: 0.5 X-Spam_bar: / X-Spam_report: (0.5 / 5.0 requ) BAYES_00=-1.9, DKIM_ADSP_CUSTOM_MED=0.001, FORGED_GMAIL_RCVD=1, FREEMAIL_FORGED_FROMDOMAIN=0.25, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.25, NML_ADSP_CUSTOM_MED=0.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:265864 Archived-At: On Tue, Mar 02 2021, Stefan Monnier wrote: > BTW, while this theme of ugly regexps keeps coming up, how 'bout we add > a new function `ere` which converts between the ERE style of regexps > where grouping parens are not escaped (and plain chars meant to match > an actual paren need to be escaped instead) to ELisp-style regexps? > > So you can do > > (string-match (ere "\\(def(macro|un|subst) .{1,}")) Better call it (rx (ere STRING)). Namespace pollution may not be prohibited by the law but mother Emacs may thank you anyway :-) Helmut