From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail
From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: modern regexes in emacs
Date: Fri, 15 Feb 2019 16:18:12 +0200
Message-ID: <83r2c9m8yj.fsf@gnu.org>
References: <20180616123704.7123f6d7@jabberwock.cb.piermont.com>
	<87po0qs6re.fsf@gmail.com>
	<CADtN0WKcKW9P5u5J=rY0kq4cBvrrvcv6FbRAD-rSXsDMSsF-zg@mail.gmail.com>
	<A74AC1AD-9D65-43F9-9BD5-17B3D40E554A@acm.org>
	<CAGK7Mr5w_iy-799OnYQEPwbbn5YvzPst+0SLuCj3qB_UQakKrw@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226";
	logging-data="191565"; mail-complaints-to="usenet@blaine.gmane.org"
Cc: mattiase@acm.org, perry@piermont.com, jaygkamat@gmail.com,
	lokedhs@gmail.com, emacs-devel@gnu.org
To: Philippe Vaucher <philippe.vaucher@gmail.com>
Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Feb 15 15:19:31 2019
Return-path: <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org>
Envelope-to: ged-emacs-devel@m.gmane.org
Original-Received: from lists.gnu.org ([209.51.188.17])
	by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256)
	(Exim 4.89)
	(envelope-from <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org>)
	id 1gueKw-000ngj-S2
	for ged-emacs-devel@m.gmane.org; Fri, 15 Feb 2019 15:19:30 +0100
Original-Received: from localhost ([127.0.0.1]:40641 helo=lists.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org>)
	id 1gueKv-00053t-SP
	for ged-emacs-devel@m.gmane.org; Fri, 15 Feb 2019 09:19:29 -0500
Original-Received: from eggs.gnu.org ([209.51.188.92]:57139)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <eliz@gnu.org>) id 1gueKB-00053d-Fz
	for emacs-devel@gnu.org; Fri, 15 Feb 2019 09:18:45 -0500
Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:46374)
	by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <eliz@gnu.org>)
	id 1gueJy-0002N1-OZ; Fri, 15 Feb 2019 09:18:33 -0500
Original-Received: from [176.228.60.248] (port=1137 helo=home-c4e4a596f7)
	by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256)
	(Exim 4.82) (envelope-from <eliz@gnu.org>)
	id 1gueJv-0000wt-Qx; Fri, 15 Feb 2019 09:18:30 -0500
In-reply-to: <CAGK7Mr5w_iy-799OnYQEPwbbn5YvzPst+0SLuCj3qB_UQakKrw@mail.gmail.com>
	(message from Philippe Vaucher on Fri, 15 Feb 2019 14:42:43 +0100)
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]
X-BeenThere: emacs-devel@gnu.org
X-Mailman-Version: 2.1.21
Precedence: list
List-Id: "Emacs development discussions." <emacs-devel.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-devel>,
	<mailto:emacs-devel-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/emacs-devel/>
List-Post: <mailto:emacs-devel@gnu.org>
List-Help: <mailto:emacs-devel-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-devel>,
	<mailto:emacs-devel-request@gnu.org?subject=subscribe>
Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org
Original-Sender: "Emacs-devel" <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org>
Xref: news.gmane.org gmane.emacs.devel:233373
Archived-At: <http://permalink.gmane.org/gmane.emacs.devel/233373>

> From: Philippe Vaucher <philippe.vaucher@gmail.com>
> Date: Fri, 15 Feb 2019 14:42:43 +0100
> Cc: emacs-devel <emacs-devel@gnu.org>, Jay Kamat <jaygkamat@gmail.com>,
> 	Elias Mårtenson <lokedhs@gmail.com>,
> 	"Perry E. Metzger" <perry@piermont.com>
> 
> I think the purpose of this thread is to ask for emacs to support PCRE regexpes in commands like
> `query-replace-regexp`.
> 
> Would this even be possible? I can imagine a whole lot of packages breaking if the regexp syntax changed,
> and changing it just for the user input in interactive functions looks a bit sketchy.

It should be possible if we introduce new functions for PCRE, or if we
mark PCRE regexps in some special way, like put a special text
property on the string.