From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: Calling a function with undefined symbol Date: Sat, 05 Nov 2022 15:32:02 +0100 Message-ID: <87sfixfp5p.fsf@dataswamp.org> References: <87wn8dzh6o.fsf@web.de> <877d0d8g3e.fsf@web.de> <87zgd9ot4p.fsf@dataswamp.org> <87r0yk9tw6.fsf@web.de> <87o7toi68e.fsf@dataswamp.org> <87tu3egbj2.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="33950"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:+QwrhK+wjZZbzLZ2IpM/uoPecuI= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sat Nov 05 16:38:10 2022 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 1orLFJ-0008aL-EG for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 05 Nov 2022 16:38:09 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1orLEx-0001hb-V0; Sat, 05 Nov 2022 11:37:48 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1orKDX-0005Ok-1v for help-gnu-emacs@gnu.org; Sat, 05 Nov 2022 10:32:15 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1orKDV-0001tm-HZ for help-gnu-emacs@gnu.org; Sat, 05 Nov 2022 10:32:14 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1orKDS-000AAv-5o for help-gnu-emacs@gnu.org; Sat, 05 Nov 2022 15:32:10 +0100 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-Mailman-Approved-At: Sat, 05 Nov 2022 11:37:46 -0400 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: "help-gnu-emacs" Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:140690 Archived-At: Michael Heerdegen wrote: >> (setq print-circle t) >> >> (setq x #1=(quote #1#)) >> >> (eq 'x x) ; nil >> (equal 'x x) ; nil >> >> ? > > I don't see any place in your code where a quote-quine is > quoted. You correctly assign a quote-quine to a variable. > But then you only quote the symbol, not the value, and > compare the quote-quine with the symbol you had bound it to. > > IOW: It's a trap! > > So how could a correct `equal'ity test of a quote-quine and > that quote-quine quoted be achieved? Beats me! Because quoting it will just add another level/layer of the same, and in the same way, to something that is already infinite. (setq print-circle t) (setq x #1=(quote #1#)) (equal x #1=(quote #1#)) ; t (equal x (quote #1=(quote #1#))) ; t (equal x (quote (quote #1=(quote #1#)))) ; and so on So I give my tongue to the cat then? -- underground experts united https://dataswamp.org/~incal