From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Searching for line beginning Date: Sat, 13 Aug 2022 12:20:04 -0400 Message-ID: References: <831qtkm9ni.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="34337"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Aug 13 18:28:12 2022 Return-path: 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 ) id 1oMtzg-0008lG-6y for ged-emacs-devel@m.gmane-mx.org; Sat, 13 Aug 2022 18:28:12 +0200 Original-Received: from localhost ([::1]:36594 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oMtzf-0008NT-97 for ged-emacs-devel@m.gmane-mx.org; Sat, 13 Aug 2022 12:28:11 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58808) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oMtrv-0000aN-Om for emacs-devel@gnu.org; Sat, 13 Aug 2022 12:20:15 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:45421) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oMtrt-0004C1-21; Sat, 13 Aug 2022 12:20:10 -0400 Original-Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 033F480796; Sat, 13 Aug 2022 12:20:07 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id BCD8C802A7; Sat, 13 Aug 2022 12:20:05 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1660407605; bh=P8xW9NlrepN5aulbfBsKXKw7kN8mhHjltJeRMTPiwUk=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=QBeroyP/eNorRfJD1ynUjAESx7b5XW/oCNv1k1EYUss1RYg/T5XsnkhlEdeJ8pn/V 14fVvKgIx3+uIGQ9+4POdyXkDTBpkt7kAE1yxwO9RYz5wyiGoVNa7bO3pRkbfn7zQC a31+WChBb+TYBWd/W5a04qdlr7aWMJVYyMGU7flMVFtbljP9k+8998whitMnsMfF09 0RiZl1vQ1+7NziwUZWT/alMSSZbNqu3ImarLyDjs67nXTqdddqnAcUy/gTjQM24HlS 4EFED330GYnIISODh2HmYD115L86UbahTxj/Pzl1yMDTXRu0I4l+zQzyXM6XHkhwV1 m/RO0xBMDkeuQ== Original-Received: from pastel (unknown [45.72.195.111]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 7ECEF120483; Sat, 13 Aug 2022 12:20:05 -0400 (EDT) In-Reply-To: <831qtkm9ni.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 13 Aug 2022 18:43:29 +0300") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:293427 Archived-At: Eli Zaretskii [2022-08-13 18:43:29] wrote: > C-a (move-beginning-of-line) does this to find the line's beginning: > > ;; Move to beginning-of-line, ignoring fields and invisible text. > (skip-chars-backward "^\n") > (while (and (not (bobp)) (invisible-p (1- (point)))) > (goto-char (previous-char-property-change (point))) > (skip-chars-backward "^\n")) > > Apart of the fields part (which can be handled by binding > inhibit-field-text-motion), can anyone see a reason why not use > line-beginning-position instead? The latter is much faster, > especially when lines are very long. You mean instead of `skip-chars-backward`? I can't see a reason, no. Stefan