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: Comparing hash table objects Date: Mon, 13 Jun 2022 09:02:41 -0400 Message-ID: References: <871qvz4kdw.fsf@localhost> <87leu7tsyc.fsf@localhost> <878rq3d9wm.fsf@localhost> <87leu1l9nn.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="17058"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Jun 13 15:09:02 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 1o0joT-0004DG-6U for ged-emacs-devel@m.gmane-mx.org; Mon, 13 Jun 2022 15:09:01 +0200 Original-Received: from localhost ([::1]:50354 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1o0joR-0006rw-QI for ged-emacs-devel@m.gmane-mx.org; Mon, 13 Jun 2022 09:08:59 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:54790) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o0jiY-0001ON-89 for emacs-devel@gnu.org; Mon, 13 Jun 2022 09:02:55 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:19499) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o0jiU-0000Wy-02 for emacs-devel@gnu.org; Mon, 13 Jun 2022 09:02:51 -0400 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id E9B7210029E; Mon, 13 Jun 2022 09:02:48 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 353D3100178; Mon, 13 Jun 2022 09:02:43 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1655125363; bh=cW0Y2vLeBqDKMA8qDqWfVkIslMyyZZv3T5TiVgwU5HA=; h=From:To:Subject:References:Date:In-Reply-To:From; b=JdbKJJJsN6zHbJ13UTRcF5LnA5geb1/urBkRkczpz19a5GtHjOwlQ3EZJWeIqkRxd GAvu9b9828uAO2YhPxTNjrXiDPQL+fEPU9SeOE0J+Fj1Mu5c3cvQT2ngJuKz7TiHtC fNsC7a4wPYZ3bLTswthfQIQIJY72dNPcJtgA2nKh2lILkmq82XINHHB7yrWqJ6us3U +Kxg5AX03pHoQXNydjsfYKgzUg+2w4sNKnVuzztPHlpwdeqw+kXfiHYctOO/3GMPlC f2rU30LEcvBu6MwyMhhTtvF/smf6v2Vcn+faw/PqkAs0uTx6fvN86WNkAo1S0lIg1J 8K2j+gCbO1GCQ== Original-Received: from pastel (unknown [45.72.221.51]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id F163212043F; Mon, 13 Jun 2022 09:02:42 -0400 (EDT) In-Reply-To: <87leu1l9nn.fsf@gnu.org> (Sam Steingold's message of "Sun, 12 Jun 2022 19:55:08 -0400") 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:291140 Archived-At: Sam Steingold [2022-06-12 19:55:08] wrote: > The way Python does it could be a good starting point: > unless a class defines __eq__ method, the comparison is Lisp eq. > So, if a class has structure, it should define the comparison method. > See https://docs.python.org/3/reference/datamodel.html#object.__eq__ Seems like the exact same way ELisp works. The problem we have right now (translated into Python) is that some people now want to add a `__eq__` method to the class `hash-table` (they argue that the lack of it was an oversight). It's easy to do what they ask for, but it breaks backward compatibility. Stefan