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.help Subject: Re: Does defvar-local has same effect as make-variable-buffer-local? Date: Sun, 16 May 2021 11:55:18 +0300 Message-ID: <83mtsvukg9.fsf@gnu.org> References: <838s4fwc5q.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="17061"; mail-complaints-to="usenet@ciao.gmane.io" To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sun May 16 10:56:22 2021 Return-path: Envelope-to: geh-help-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 1liCZR-0004FW-14 for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 16 May 2021 10:56:21 +0200 Original-Received: from localhost ([::1]:33180 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1liCZQ-0000fC-1X for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 16 May 2021 04:56:20 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:33784) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1liCYQ-0000cW-0K for help-gnu-emacs@gnu.org; Sun, 16 May 2021 04:55:18 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:44802) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1liCYP-0008Al-PM for help-gnu-emacs@gnu.org; Sun, 16 May 2021 04:55:17 -0400 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:4249 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 1liCYO-0005iZ-8V for help-gnu-emacs@gnu.org; Sun, 16 May 2021 04:55:17 -0400 In-Reply-To: (message from Jean Louis on Sun, 16 May 2021 11:09:02 +0300) X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:129829 Archived-At: > Date: Sun, 16 May 2021 11:09:02 +0300 > From: Jean Louis > Cc: help-gnu-emacs@gnu.org > > * Eli Zaretskii [2021-05-16 07:12]: > > > Date: Sat, 15 May 2021 23:14:38 +0300 > > > From: Jean Louis > > > > > > I did read the documentation, yet I need assurance on this subject. > > > > Why not look at the source? Then you could be absolutely sure. > > Because I read the other sources (not source of definition) I get > confused, example in simple.el: > > (defvar minibuffer-history-isearch-message-overlay) > (make-variable-buffer-local 'minibuffer-history-isearch-message-overlay) > > Then I ask myself why did not author straight write like: > > (defvar-local minibuffer-history-isearch-message-overlay) > > I ask myself why that, what is the difference... then I need > assistance in clarification. The doc string of defvar-local answers that question as well: (defvar-local VAR VAL &optional DOCSTRING) Probably introduced at or before Emacs version 24.3. ^^^^^^^^^^^^ So code written before that version couldn't use defvar-local.