From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Yuan Fu Newsgroups: gmane.emacs.devel Subject: Understanding end-of-defun Date: Tue, 25 Oct 2022 19:22:27 -0700 Message-ID: <46FF2036-9AB4-4C57-82B5-51260D287FC5@gmail.com> Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3696.120.41.1.1\)) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="2755"; mail-complaints-to="usenet@ciao.gmane.io" To: emacs-devel Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Wed Oct 26 04:24:00 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 1onW5I-0000Sm-DF for ged-emacs-devel@m.gmane-mx.org; Wed, 26 Oct 2022 04:24:00 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1onW3w-0002bP-Vu; Tue, 25 Oct 2022 22:22:38 -0400 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 1onW3t-0002M8-9D for emacs-devel@gnu.org; Tue, 25 Oct 2022 22:22:33 -0400 Original-Received: from mail-pg1-x52c.google.com ([2607:f8b0:4864:20::52c]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1onW3r-0002xG-Qh for emacs-devel@gnu.org; Tue, 25 Oct 2022 22:22:33 -0400 Original-Received: by mail-pg1-x52c.google.com with SMTP id q1so13443583pgl.11 for ; Tue, 25 Oct 2022 19:22:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=to:date:message-id:subject:mime-version:content-transfer-encoding :from:from:to:cc:subject:date:message-id:reply-to; bh=y0bFJ7xOXbmqmYLoj3c2wR9WhTEKnUEbTH5mGm7lBQQ=; b=mUiUSYOVl2L/XdwB8DTGjZHtVreK+OyQo73YFt6uboZCNKPR0RnNUEwkCoGauESr6L ex6g6rqMSjhJU9Jlh5hjbh9n2TksvYlBiWN9McOjJxe9lwIxoRgHHIBs/v5B0+Waw6hW 2SWIfuIIKUxpS1oFD1R1NMEYMTwB9GgbkR36TSiVCWu12af5BJPmw8D9ThykXq3j9F1q GRX66DRFPBMEy+syYXzQT2quZjkMndlLoKgI6WsuaRbLuwH08gx+YpCb/2Dz305nAURn hizWVZcVs6KC0jLb+Hz66wG9UHghFtNeYyvEY6mlGSO08jysOjWDsT4d3DiuJH0ee3eo 5Ifw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:date:message-id:subject:mime-version:content-transfer-encoding :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=y0bFJ7xOXbmqmYLoj3c2wR9WhTEKnUEbTH5mGm7lBQQ=; b=VGFx17W+67geWJEwK9hxBaePYnMmnuk2Tzpu2GJiExCavCzBn+1m2YZSt/qhEgHJdO wYLrl7YUnh704iPMkrHGQ+OaQag0o8Ymj5obRjDDLfT7jCt9wBUPDxRhe2kDjcJWIWnm wLe0ezWZyTIKaTQEoVn2agmM9P2/pEX0oaphr0js2/5I2WvhRKwM2yczoHmFn1nQY2X8 iMfp0EyjYA7WdaR9mHRuFmuXFKjkgweC18X9Pj5AIscgftiNzGI2Xnx0yQ8bFimBgI/1 J6gI6BJ5IP3cC+KLixzYVRhQ5gLl15NJzruLL+CXntjL6jDXuGx6NRE5ym9tmj6EaL4T 571A== X-Gm-Message-State: ACrzQf23mxhOfKwYNcNsUa4vTXsn3o1frsZPKDDCDtgNSv+1zIzMLb1F C/jN/+1KapErTwaja5QG67KZpYJ33/M= X-Google-Smtp-Source: AMsMyM6t9J1M+RUceSAIGHs4idqof2MgEMf8hFhMAU0vaa5ve5AYxfG3v2JHIk+VReIe2Jl/GmQMtA== X-Received: by 2002:a63:5658:0:b0:43c:dac:9e24 with SMTP id g24-20020a635658000000b0043c0dac9e24mr34866964pgm.562.1666750949973; Tue, 25 Oct 2022 19:22:29 -0700 (PDT) Original-Received: from smtpclient.apple (cpe-172-117-161-177.socal.res.rr.com. [172.117.161.177]) by smtp.gmail.com with ESMTPSA id f13-20020a170902684d00b0018661d627d7sm1823515pln.59.2022.10.25.19.22.28 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 25 Oct 2022 19:22:29 -0700 (PDT) X-Mailer: Apple Mail (2.3696.120.41.1.1) Received-SPF: pass client-ip=2607:f8b0:4864:20::52c; envelope-from=casouri@gmail.com; helo=mail-pg1-x52c.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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: , Original-Sender: "Emacs-devel" Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:298507 Archived-At: I=E2=80=99m looking at end-of-defun=E2=80=99s definition, and these two = lines looks weird: Line 570 in lisp.el: (unless (zerop arg) (beginning-of-defun-raw (- arg)) (funcall end-of-defun-function)) Presumably this makes us go to the next arg=E2=80=99h begining-of-defun, = and goes to the end of that defun. However, what if = beginning-of-defun-raw couldn=E2=80=99t find any defun beyond point, = didn=E2=80=99t move point, and returned nil? At that point calling = end-of-defun-function breaks the assumption that we only call it when = point is at the beginning of a defun. Am I missing something? Yuan=