From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: "Perry E. Metzger" Newsgroups: gmane.emacs.devel Subject: Re: regex.c simplification Date: Sat, 16 Jun 2018 12:35:49 -0400 Message-ID: <20180616123549.3203b454@jabberwock.cb.piermont.com> References: NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Trace: blaine.gmane.org 1529166867 28712 195.159.176.226 (16 Jun 2018 16:34:27 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 16 Jun 2018 16:34:27 +0000 (UTC) Cc: emacs-devel@gnu.org To: "Daniel Colascione" Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Jun 16 18:34:23 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 1fUE9e-0007Mp-NN for ged-emacs-devel@m.gmane.org; Sat, 16 Jun 2018 18:34:22 +0200 Original-Received: from localhost ([::1]:52168 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fUEBm-0005BY-2O for ged-emacs-devel@m.gmane.org; Sat, 16 Jun 2018 12:36:34 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:47935) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fUEB5-0005BS-N7 for emacs-devel@gnu.org; Sat, 16 Jun 2018 12:35:52 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fUEB4-0007Vk-Kb for emacs-devel@gnu.org; Sat, 16 Jun 2018 12:35:51 -0400 Original-Received: from hacklheber.piermont.com ([2001:470:30:84:e276:63ff:fe62:3400]:45114) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fUEB4-0007VH-GS for emacs-devel@gnu.org; Sat, 16 Jun 2018 12:35:50 -0400 Original-Received: from snark.cb.piermont.com (localhost [127.0.0.1]) by hacklheber.piermont.com (Postfix) with ESMTP id 06FC82F1; Sat, 16 Jun 2018 12:35:50 -0400 (EDT) Original-Received: from jabberwock.cb.piermont.com (jabberwock.cb.piermont.com [10.160.2.107]) by snark.cb.piermont.com (Postfix) with ESMTP id E14A92DEC43; Sat, 16 Jun 2018 12:35:49 -0400 (EDT) In-Reply-To: X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2001:470:30:84:e276:63ff:fe62:3400 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:226376 Archived-At: On Sat, 16 Jun 2018 08:35:34 -0700 "Daniel Colascione" wrote: > I was doing some work on regex.c just now, and I was frustrated > that the code is unnecessarily complicated by the ifdefs necessary > to support some theoretical non-Emacs use case. Is all of this > complexity really necessary? Are we sure the !emacs case even > compiles? Are there non-Emacs users of the Emacs regex code? Can we > just fork the implementation? How about baking in switches like > MATCH_MAY_ALLOCATE? The emacs regex code is hardly state of the art. I would suggest that there are many other, better, free software implementations of regexes. Indeed, arguably at some point the Emacs regex code could use an overhaul. Perry -- Perry E. Metzger perry@piermont.com