From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail
From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: [PATCH] Remove obsolete fast-lock and lazy-lock libraries
Date: Mon, 10 Aug 2020 17:02:48 +0300
Message-ID: <83y2mm4n07.fsf@gnu.org>
References: <fd4kpbeib0.fsf@norden.tntech.edu>
 <jwvpn7z38mn.fsf-monnier+emacs@gnu.org> <83364v5j28.fsf@gnu.org>
 <jwvr1sf177n.fsf-monnier+emacs@gnu.org>
Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214";
	logging-data="6499"; mail-complaints-to="usenet@ciao.gmane.io"
Cc: stefankangas@gmail.com, jnorden@tntech.edu, emacs-devel@gnu.org
To: Stefan Monnier <monnier@iro.umontreal.ca>
Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Aug 10 16:03:57 2020
Return-path: <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>
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 <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>)
	id 1k58P6-0001Yo-RY
	for ged-emacs-devel@m.gmane-mx.org; Mon, 10 Aug 2020 16:03:56 +0200
Original-Received: from localhost ([::1]:33696 helo=lists1p.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.90_1)
	(envelope-from <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>)
	id 1k58P5-0006Si-RV
	for ged-emacs-devel@m.gmane-mx.org; Mon, 10 Aug 2020 10:03:55 -0400
Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:56504)
 by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.90_1) (envelope-from <eliz@gnu.org>) id 1k58OF-0005d1-Oc
 for emacs-devel@gnu.org; Mon, 10 Aug 2020 10:03:03 -0400
Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:50648)
 by eggs.gnu.org with esmtp (Exim 4.90_1)
 (envelope-from <eliz@gnu.org>)
 id 1k58OE-0004iu-Lk; Mon, 10 Aug 2020 10:03:02 -0400
Original-Received: from [176.228.60.248] (port=2245 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 1k58OE-000721-4M; Mon, 10 Aug 2020 10:03:02 -0400
In-Reply-To: <jwvr1sf177n.fsf-monnier+emacs@gnu.org> (message from Stefan
 Monnier on Mon, 10 Aug 2020 00:02:01 -0400)
X-BeenThere: emacs-devel@gnu.org
X-Mailman-Version: 2.1.23
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: <https://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-mx.org@gnu.org
Original-Sender: "Emacs-devel"
 <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>
Xref: news.gmane.io gmane.emacs.devel:253587
Archived-At: <http://permalink.gmane.org/gmane.emacs.devel/253587>

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Mon, 10 Aug 2020 00:02:01 -0400
> Cc: stefankangas@gmail.com, jnorden@tntech.edu, emacs-devel@gnu.org
> 
> >> IMNSHO, that variable should not be a defcustom any more and we
> >> shouldn't encourage users to touch it.  IOW we should mark it obsolete.
> > Could you please elaborate on your rationale for this?
> 
> AFAIK the only use for it is debugging.
> In non-debugging contexts, font-lock-with-jit-lock should "always" give
> better behavior than font-lock-without-jit-lock.

OK, but why does that mean we should demote it from being a defcustom?
People who need to debug font-lock are also users, and being unable to
change the value through "M-x set-variable" is an annoyance, at least
for me.

Do you see any harm in keeping it as a defcustom?