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.help Subject: Re: EIEIO accessing class slots Date: Fri, 11 Jun 2021 09:45:17 -0400 Message-ID: References: <87eed9pwyi.fsf@riseup.net> <87mtrxnvp7.fsf@riseup.net> <87bl8dns8v.fsf@riseup.net> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="40855"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: help-gnu-emacs@gnu.org To: pillule Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Jun 11 15:46:34 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 1lrhUY-000ANn-L4 for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 11 Jun 2021 15:46:34 +0200 Original-Received: from localhost ([::1]:60800 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lrhUX-0002mF-Ec for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 11 Jun 2021 09:46:33 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:54608) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lrhTT-0002m6-0p for help-gnu-emacs@gnu.org; Fri, 11 Jun 2021 09:45:27 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:9263) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lrhTP-00062R-QB for help-gnu-emacs@gnu.org; Fri, 11 Jun 2021 09:45:25 -0400 Original-Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 650AB808D9; Fri, 11 Jun 2021 09:45:19 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 04D56807F5; Fri, 11 Jun 2021 09:45:18 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1623419118; bh=fVCDFXuiAE5GVGUqHukxnlVZVxmrIDBwvOJAR9loo3s=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=nT/CFi+aJwM4BubJ6xMcM/yM0MdN7mkXj4nREukUXmRFam2+EvXrBYf1iQQNf7k7W J4yOByAAKSdoL1C3u1rvMUembsRpAtYE8fRI8vhlfBemkhcD99IFqOT53C4qTh4I/N +YyzuSgIZw0ZkZiRkvd5UFgeqCTnhtAPqRicAeHfBppPLfU5qhwrk0qrhqV1U+iqYR Y6hP/d/JfOMPl6kG4Tk05YG81CYjktbx13BKzNgUKQP+iO0pZZkEB4On1Ihq95X8pL LIuNnBlZi+XNsn7A0KoYbF4z5wcGcvJaShHU+n5pd15fDdxaxJGL9RM8LAMfsTHDNd kV1YN5mNg761w== Original-Received: from alfajor (69-196-163-239.dsl.teksavvy.com [69.196.163.239]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id D47A11201C1; Fri, 11 Jun 2021 09:45:17 -0400 (EDT) In-Reply-To: <87bl8dns8v.fsf@riseup.net> (pillule@riseup.net's message of "Fri, 11 Jun 2021 02:23:37 +0200") 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 autolearn=ham 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:130753 Archived-At: >> (oref-default 'moirai-dired-side :display-alist) >> instead of >> (oref-default 'moirai-dired-side 'display-alist) >> ? > because it don't work. Oh, that's right `oref` and `oref-default` are macros, which quote their second arg, contrary to `slot-value` which is a function and is the more "normal" accessor. But there's no `slot-value-default`, indeed. [ Side note: Using the slot name, as in (oref-default 'moirai-dired-side display-alist), is more efficient than using the initarg name, as in (oref-default 'moirai-dired-side :display-alist), which is deprecated. ] >> Also, why do you need to do (oref-default 'moirai-dired-side >> :display-alist), what do you expect it to return? > The default value inherited by some of the objects. But this is a lie :-( The real semantics of the "default value" is a lot more murky. It works like you expect only when the default value is defined as a constant. >> If you expect it to return the ((moirai-dired-p) ...) >> you specified in the `defclass`, then why not do: >> (defvar foo-bar '((moirai-dired-p) ...)) >> so you can get this value without having to ask the class? > Is that terrible to ask to the class ? To the extent that it doesn't exist in CLOS, then I think it's better to avoid using this functionality ;-) Stefan