From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" Newsgroups: gmane.emacs.bugs Subject: bug#67008: 30.0.50; Multiple major mode parents Date: Mon, 13 Nov 2023 12:46:41 -0500 Message-ID: References: <445405AC-C0DA-4914-984E-B42671AB536D@gmail.com> <7C4E82A5-0F5A-4E04-B2BD-AD6DEC56A8C0@gmail.com> <2D8636AB-AB86-4FB5-BCCB-E10D0B9CD8C8@gmail.com> Reply-To: Stefan Monnier Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="30305"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Cc: 67008@debbugs.gnu.org, Ikumi Keita , Yuan Fu , Dmitry Gutov To: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon Nov 13 18:51:36 2023 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 1r2b5y-0007ci-Bk for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 13 Nov 2023 18:51:34 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r2b53-000338-4H; Mon, 13 Nov 2023 12:50:37 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r2b4t-00030o-Cm for bug-gnu-emacs@gnu.org; Mon, 13 Nov 2023 12:50:30 -0500 Original-Received: from debbugs.gnu.org ([2001:470:142:5::43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1r2b4m-0003yc-Ge for bug-gnu-emacs@gnu.org; Mon, 13 Nov 2023 12:50:26 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1r2b5R-0006eS-VG for bug-gnu-emacs@gnu.org; Mon, 13 Nov 2023 12:51:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 13 Nov 2023 17:51:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 67008 X-GNU-PR-Package: emacs Original-Received: via spool by 67008-submit@debbugs.gnu.org id=B67008.169989780325497 (code B ref 67008); Mon, 13 Nov 2023 17:51:01 +0000 Original-Received: (at 67008) by debbugs.gnu.org; 13 Nov 2023 17:50:03 +0000 Original-Received: from localhost ([127.0.0.1]:59296 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1r2b4V-0006dA-E8 for submit@debbugs.gnu.org; Mon, 13 Nov 2023 12:50:03 -0500 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:15942) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1r2b4S-0006cb-Sx for 67008@debbugs.gnu.org; Mon, 13 Nov 2023 12:50:01 -0500 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 445B9100068; Mon, 13 Nov 2023 12:49:13 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1699897748; bh=1HgRCU5UYaEOqJ+C5JKlDw7s7Ujy2xZ/9pVrBUnYMX0=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=cm9IRxDmabVuAxXzUrxdqyMi8B+Jtm7qr34j4eRHDTVPStons5loIvbjpwoDvQSAo MVG1tFrBX4+g6jAaJ/49YeCs2QBKrrSKrT67TjDJbQ+pRBfCjKG2Pv4amcbvuB2Jzu oDxlslqbRUnoTroQ4cS2/wu6+yRnaHxOCULJOG1NDIaHAlX6BbKPb6w/4LjoVDXVlw kk/s/DlUWjG44XP+3lQ8CY+CDo+0yCvNZrQ6dZGfiwHUnR44wE7t8LXDOpv/uwmqoY e4yqqi5BS3yBZkbZOMdBmCcFgQCGpFG/6gUmKyrcYeSHrL98TLjQIZeawHKfEKgJBf if/BAwQoNdKWg== Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 73B84100033; Mon, 13 Nov 2023 12:49:08 -0500 (EST) Original-Received: from lechazo (lechon.iro.umontreal.ca [132.204.27.242]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 5B59E12040A; Mon, 13 Nov 2023 12:49:08 -0500 (EST) In-Reply-To: <2D8636AB-AB86-4FB5-BCCB-E10D0B9CD8C8@gmail.com> ("Mattias =?UTF-8?Q?Engdeg=C3=A5rd?="'s message of "Mon, 13 Nov 2023 17:44:24 +0100") 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-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:274279 Archived-At: > Intuitively though, wouldn't we distinguish vertical (class-parent) edges > from horizontal (parent-parent) ones? Use stiffer springs when building > the former? Yes we strictly obey the vertical edges (and call `error-function` when that's not an option) and we use the horizontal edges when there's a choice. E.g. for (B A) (C A) (D B) (E D C) -> (E D B C A) vs (E D C) (B A) (C A) (D B) -> (E D C B A) the vertical edges force the "E D" at the beginning and the "A" at the end but it's the horizontal edges that make us prefer "B C" in the first case and "C B" in the other. This is because after removing the "E D" which are uniquely determined by the vertical dependencies we're left with: (B A) (C A) (B) (C) vs (C) (B A) (C A) (B) So we continue with "B" in the first case and with "C" in the second. Stefan