From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eric Abrahamsen Newsgroups: gmane.emacs.devel Subject: Re: rx.el sexp regexp syntax Date: Fri, 25 May 2018 11:56:09 -0700 Message-ID: <87in7bd0om.fsf@ericabrahamsen.net> References: <87h8mw3yoc.fsf@gmail.com> <20180525155126.GA4096@ACM> <87lgc7hebk.fsf@gmail.com> <87r2lzd375.fsf@ericabrahamsen.net> <87in7bhaff.fsf@gmail.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1527274636 28080 195.159.176.226 (25 May 2018 18:57:16 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 25 May 2018 18:57:16 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri May 25 20:57:12 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fMHtn-0007DC-J1 for ged-emacs-devel@m.gmane.org; Fri, 25 May 2018 20:57:11 +0200 Original-Received: from localhost ([::1]:46428 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fMHvu-0002DD-MJ for ged-emacs-devel@m.gmane.org; Fri, 25 May 2018 14:59:22 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:55719) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fMHvl-0002Cu-QF for emacs-devel@gnu.org; Fri, 25 May 2018 14:59:14 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fMHvh-0004bh-Va for emacs-devel@gnu.org; Fri, 25 May 2018 14:59:13 -0400 Original-Received: from [195.159.176.226] (port=57272 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fMHvh-0004bL-LL for emacs-devel@gnu.org; Fri, 25 May 2018 14:59:09 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1fMHtW-0006rx-61 for emacs-devel@gnu.org; Fri, 25 May 2018 20:56:54 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 16 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:sfd9LE1IQKckwavkDSRCUUjX6B8= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:225722 Archived-At: Pierre Neidhardt writes: > Eric Abrahamsen writes: > >> Slightly off-topic: I wouldn't ever use rx unless I was writing a really >> brutal regexp, > > Why not? I think it's just what Alan is saying: if you're familiar with regexp, it's easier to write them directly. Each of us has a different level of familiarity, thus each of us has a different point at which we might break off and use rx. A regexp that would make my eyes cross (with "\\(\\(\\(") could be perfectly comprehensible to someone else. Personally, I'd use rx with more than two nested layers of group-capture, but that's only me.