From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Dr Rainer Woitok Newsgroups: gmane.emacs.help Subject: RE: [External] : Re: (interactive) and &optional Date: Sat, 25 Mar 2023 16:36:39 +0100 Message-ID: <25631.5383.194807.881566@woitok.gmail.com> References: <25628.42021.832534.376361@woitok.gmail.com> <87jzz746ma.fsf@posteo.net> <25630.60070.913514.100455@woitok.gmail.com> <87fs9t3rfz.fsf@posteo.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="35412"; mail-complaints-to="usenet@ciao.gmane.io" Cc: "help-gnu-emacs@gnu.org" To: Drew Adams Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sat Mar 25 16:37:15 2023 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 1pg5xD-00090t-0s for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 25 Mar 2023 16:37:15 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pg5wj-0001i4-Cz; Sat, 25 Mar 2023 11:36:45 -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 1pg5wi-0001hh-9I for help-gnu-emacs@gnu.org; Sat, 25 Mar 2023 11:36:44 -0400 Original-Received: from mail-wm1-x32a.google.com ([2a00:1450:4864:20::32a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1pg5wg-0005LR-Qz for help-gnu-emacs@gnu.org; Sat, 25 Mar 2023 11:36:43 -0400 Original-Received: by mail-wm1-x32a.google.com with SMTP id u1so2680774wmn.5 for ; Sat, 25 Mar 2023 08:36:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1679758601; h=references:in-reply-to:subject:cc:to:message-id :content-transfer-encoding:mime-version:date:from:from:to:cc:subject :date:message-id:reply-to; bh=89e8XfMK9HuKHwsf3HRdmBvqASaZMm+YKSvjpVyFWlQ=; b=G5y4Tsz0ZRohi+8B6yWHcWGwpFMAI5ba2ZPMhn0gz5zGT66p9I+4DqFRPJehQ59+1H /I+XlwGIcn+e7+J4mZTgZ1ETSYKZt3VTPhfmu+2PJ2noNdj4hn0rBPAiZ+piLZEVDQoV PM1RXhSz7zApj4n6Lkoebx190ga/jq0zCXzG5hEOZDscSKQ3rR8j6Afq4lW6XDsUAaGo Ugduv0wDR73hC0IfTqDBTAFjR05MVe2xBqM/4mNjpXDnDxo6R4XECyD9jExYdjdUw0M8 uFwer8YR1IDQIVme54/Sg1mo9SP6ujcKMfHTKo5UpMLsKVLUPYFm25Srnx/Eca4DpqLF kBSg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1679758601; h=references:in-reply-to:subject:cc:to:message-id :content-transfer-encoding:mime-version:date:from:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=89e8XfMK9HuKHwsf3HRdmBvqASaZMm+YKSvjpVyFWlQ=; b=7JlM8OWtEAGk94VXroEC39HJDLjCKz3xn7jU+XXfAJqmWXlqEeTYZzn4yruyaa/STx KlP+7w7A+TKlQu9KTrkbHR3nzDKcCNVF2qajFD31iksgEaGtsWfUaG/kyLd7eRZC9Zcy tIIpgDgHcVx+nIu6l+gmBVW77o1ncUHBjgrDFowf6lmQeOYWZnPbor+yGQNHeFOFT/AG 1LkuieFLGjaeVCG+lraGCBTF2BtEGD58XJW5Bh4b3tHTKNi+gc/EXnc68JAGN6ARq1th Q1CaI7S1kdDjxcYOzYrsJRGLiR0Kq3AhR9M6HPbhQ1NfEHZRAtwZUGQuJD24vamwduS4 gwgg== X-Gm-Message-State: AO0yUKU+vz6wu4CQTlcESb0zwb8BTwNIrnvST0ZLF1N4rrzFRIeB8qpy CGs/vmvW5MoW9m9/Vv9cXLs= X-Google-Smtp-Source: AK7set/x2KDUo13hgDyZ5HRB1OTicqtR0wwafei0rAAmx/Z3tL346oEIbE0c8WUp5rm5aYvVLRlXPA== X-Received: by 2002:a05:600c:ac3:b0:3ed:af6b:7faa with SMTP id c3-20020a05600c0ac300b003edaf6b7faamr4887716wmr.17.1679758600975; Sat, 25 Mar 2023 08:36:40 -0700 (PDT) Original-Received: from gmail.com (p200300df0703367dec9d611ecd73f259.dip0.t-ipconnect.de. [2003:df:703:367d:ec9d:611e:cd73:f259]) by smtp.gmail.com with ESMTPSA id v4-20020a05600c214400b003ef62deb830sm2123060wml.25.2023.03.25.08.36.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 25 Mar 2023 08:36:40 -0700 (PDT) X-Google-Original-From: Dr Rainer Woitok In-Reply-To: Msg of 2023-03-25 14:33:46 +0000 from drew.adams@oracle.com X-Mailer: VM 8.2.0b under 28.2 (x86_64-pc-linux-gnu) Received-SPF: pass client-ip=2a00:1450:4864:20::32a; envelope-from=rainer.woitok@gmail.com; helo=mail-wm1-x32a.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 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-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:143113 Archived-At: Drew, On Saturday, 2023-03-25 14:33:46 +0000, you wrote: > ... > > > Does an empty symbol have an external representation like an empty list or string, allowing the use of "eq"? > > Yes: ## Thanks for that piece of information! This lets me get rid of the awk- ward (in my opinion) call "(string-empty-p arg)", where "arg" contains a possibly empty symbol. Sincerely, Rainer