From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Re: [External] : Re: Which Elisp types are mutable? Date: Mon, 05 Jul 2021 22:58:59 +0200 Message-ID: <878s2kcwa4.fsf@zoho.eu> References: <0404DE66-DD17-41F2-B6CC-EC06937CD152@gmail.com> <874keca73x.fsf@mbork.pl> <70773EA8-6549-4C03-941C-FADAB1BE441A@gmail.com> <8735tw9l14.fsf@mbork.pl> <4AA1E624-B979-4B08-8AE0-E33A1C9A0E94@gmail.com> <834kd8ha0c.fsf@gnu.org> <20210705185503.GD6395@tuxteam.de> <20210705194034.GE6395@tuxteam.de> <20210705201253.GF6395@tuxteam.de> Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="13651"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:jHnkFdQR0m4tm35ukQWA0Ol9SXQ= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Jul 05 22:59:49 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 1m0Vgz-0003Ou-Bc for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 05 Jul 2021 22:59:49 +0200 Original-Received: from localhost ([::1]:35110 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m0Vgy-000630-8H for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 05 Jul 2021 16:59:48 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:44360) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m0VgP-00062r-8R for help-gnu-emacs@gnu.org; Mon, 05 Jul 2021 16:59:13 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:41456) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m0VgN-0007jg-SD for help-gnu-emacs@gnu.org; Mon, 05 Jul 2021 16:59:13 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1m0VgL-0002em-Sd for help-gnu-emacs@gnu.org; Mon, 05 Jul 2021 22:59:09 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action 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:131504 Archived-At: Drew Adams wrote: >> Hm. If you change a variable's value... does that count as >> "mutating the symbol"? If you change the binding (e.g. >> by entering another scope or by leaving it)? > > (Changing a symbol's binding, with `let' etc. is more > complicated. I mentioned global value.) > > If you look at a Lisp symbol as being an object with > properties, then yes; changing its variable value changes > the object - its mutable state. You can change the symbol as a practically employed instance but not as a concept... -- underground experts united https://dataswamp.org/~incal