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 Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Re: Which Elisp types are mutable? Date: Sat, 05 Jun 2021 10:25:15 -0400 Message-ID: References: <87h7ifa932.fsf@mbork.pl> <0404DE66-DD17-41F2-B6CC-EC06937CD152@gmail.com> <874keca73x.fsf@mbork.pl> <70773EA8-6549-4C03-941C-FADAB1BE441A@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="21797"; 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:a3tHm5COE/voJsd+RHHgMGH/v8w= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sat Jun 05 16:25:53 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 1lpXFJ-0005VN-5C for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 05 Jun 2021 16:25:53 +0200 Original-Received: from localhost ([::1]:57912 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lpXFH-0001WU-Cj for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 05 Jun 2021 10:25:51 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:59020) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lpXEs-0001WI-6C for help-gnu-emacs@gnu.org; Sat, 05 Jun 2021 10:25:26 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:40814) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lpXEq-0002VM-M0 for help-gnu-emacs@gnu.org; Sat, 05 Jun 2021 10:25:25 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1lpXEl-0004ix-LY for help-gnu-emacs@gnu.org; Sat, 05 Jun 2021 16:25:19 +0200 X-Injected-Via-Gmane: http://gmane.org/ 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:130548 Archived-At: > "You must not mutate them" is the definition of immutable. Not necessarily: where I come from "immutable" means that the object cannot and will not be mutated. Stefan