From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#459: Zero-length overlays, overlay keymaps, and `overlays-at' Date: Mon, 19 Jul 2021 21:35:28 +0300 Message-ID: <83pmve5ez3.fsf@gnu.org> References: <485D204B.2@dr-qubit.org> <875yx6mijw.fsf@gnus.org> <83y2a25ktq.fsf@gnu.org> <87y2a2i7kc.fsf@gnus.org> <87k0lmi2ms.fsf@gnus.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="28666"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 459@debbugs.gnu.org, monnier@iro.umontreal.ca, t.s.cubitt.98@cantab.net To: Lars Ingebrigtsen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon Jul 19 20:36:09 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1m5Y7c-0007FJ-Vf for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 19 Jul 2021 20:36:08 +0200 Original-Received: from localhost ([::1]:60752 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m5Y7b-0007NW-WC for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 19 Jul 2021 14:36:08 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:60398) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m5Y7W-0007NJ-Pq for bug-gnu-emacs@gnu.org; Mon, 19 Jul 2021 14:36:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:48769) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1m5Y7W-000815-Hh for bug-gnu-emacs@gnu.org; Mon, 19 Jul 2021 14:36:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1m5Y7W-00044D-E9 for bug-gnu-emacs@gnu.org; Mon, 19 Jul 2021 14:36:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 19 Jul 2021 18:36:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 459 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: moreinfo Original-Received: via spool by 459-submit@debbugs.gnu.org id=B459.162671974315607 (code B ref 459); Mon, 19 Jul 2021 18:36:02 +0000 Original-Received: (at 459) by debbugs.gnu.org; 19 Jul 2021 18:35:43 +0000 Original-Received: from localhost ([127.0.0.1]:60315 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m5Y7D-00043f-BM for submit@debbugs.gnu.org; Mon, 19 Jul 2021 14:35:43 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:34336) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m5Y7B-00043T-NI for 459@debbugs.gnu.org; Mon, 19 Jul 2021 14:35:42 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:52180) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m5Y75-0007kP-4J; Mon, 19 Jul 2021 14:35:35 -0400 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:4426 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m5Y74-0007Tq-Os; Mon, 19 Jul 2021 14:35:35 -0400 In-Reply-To: <87k0lmi2ms.fsf@gnus.org> (message from Lars Ingebrigtsen on Mon, 19 Jul 2021 20:23:39 +0200) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:210303 Archived-At: > From: Lars Ingebrigtsen > Cc: Eli Zaretskii , 459@debbugs.gnu.org, > t.s.cubitt.98@cantab.net > Date: Mon, 19 Jul 2021 20:23:39 +0200 > > Stefan Monnier writes: > > > I vote for a) with or without the requirement of a new optional arg. > > The reason I vote for a) rather than b) is because AFAICT `overlays-at` > > does not pay currently attention to from/rear advance properties, so it > > would be weird to do that just for empty overlays. > > That's an excellent point. > > I'll have a look at doing a) tomorrow, then, unless we (in the mean > time) decide to just include these overlays without adding a new > parameter. No, please don't make that the default behavior. It makes no sense to change the default behavior of such a veteran API for the benefit of a rare use case. The gains are very small, and don't justify the risks. An optional argument gets us the best of both worlds, so it's a clear winner.