From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jean Abou Samra Newsgroups: gmane.emacs.help Subject: Re: Calling a function with undefined symbol Date: Mon, 31 Oct 2022 10:24:45 +0100 Message-ID: <4D4045F3-B3DF-4FE1-A5C4-4BB5E3256BF5@abou-samra.fr> References: Mime-Version: 1.0 (1.0) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="9260"; mail-complaints-to="usenet@ciao.gmane.io" Cc: tomas@tuxteam.de, help-gnu-emacs@gnu.org To: Heime Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Oct 31 10:25:34 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 1opR30-00027T-Dr for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 31 Oct 2022 10:25:34 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1opR2Y-0001fP-Dx; Mon, 31 Oct 2022 05:25:06 -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 1opR2X-0001fI-5p for help-gnu-emacs@gnu.org; Mon, 31 Oct 2022 05:25:05 -0400 Original-Received: from mout.kundenserver.de ([212.227.126.134]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1opR2V-0004PA-HH for help-gnu-emacs@gnu.org; Mon, 31 Oct 2022 05:25:04 -0400 Original-Received: from smtpclient.apple ([37.170.43.154]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.168]) with ESMTPSA (Nemesis) id 1Mbies-1pKeWI0JLi-00dI60; Mon, 31 Oct 2022 10:25:00 +0100 In-Reply-To: X-Mailer: iPhone Mail (20A380) X-Provags-ID: V03:K1:y1MyFnqeDCfFf/5xu04RrZ+4wjQOVvixlxcNaGqSfHd2bRy3uKw ZxzR2QPbvXxSeADD3np9FMUKz0wAl0rUM1VSwq/0y3dZL92oNIpgshiUWZaijzKjRkxiRjq khqheh6nsXq+cIjiCX8ebi/+7tQfxyCBiF049YUM02pP7ZEY7GM/HbO4+Xc1HUJYD899Jv0 keOkwQA2CumBQ+QhjyQxw== X-UI-Out-Filterresults: notjunk:1;V03:K0:oAKCrVlpLB0=:G0zmiHMBzDMG+75PacSpD4 hWqsWZytq/4xG43ROv6ZdjpzIqY/jpJIbTlx0c1geKtVW2JtwAKwxf/wEj7T9K66HCtICwLCy N6i6srOmXe9IJWnnV4Ycta3Xy5JlQ4+mQmrZ7rfwsf9ASFrFwFVnuFu1HJrx6o7q5rG93ZSkR 7h+KN21N7Ty+vX5KDW5roo6H0fMV1Lk32XJe4RmUykyhqSliY3obSVFUhWKxQ/f+PdNzwZIVD tgeIt/MmoB3k935x7vbIexkrI64opcp7hgoUlkkW7d6DiyEJrIdoJ5i/ZClGp3LYkN/RjeNVq 568GHsNV0dXjdGzTo/XN9O9RyK6dVQHTLV5Qka2IJQY+AEWZY/z0xn9IvCEqI3AhQRbQRiLwo agpQ0dzIDSUhKMzUknFNzLBTyBSK1vYidA20pJWu6hsXf/UVeGFPd2tWvs/K4rtL0hPFlM7VU B7ScaGFvUdIPNbqjx+iX9BIbk6CEHpj2iA4o4N+Wq552B+vOIXIpKOPJ3zDR2rB1SprTWSX3G srWFAZCU5L/tGGUBkhJ7VjhFrLGElqANSyzhInnbNm+p/A2rDHoWahqHuU5jwM7a3aOu9I6sP dKQjVjdxQLzcibGIwjt+ClOYM7kQJDP1gGD4c/XqqKCg08UOkX3LteJBy4mK5iZ+It7zHuDqH 2U0IbeEgJtHkKshZANIvZPKj49P147rRJih6J3maw94iVmpJetodBMGyt0QfU1XOW9E8Ofu6y mIJx5RUe5xOAen8vSNL87T+533Tj6V99uENnZfObUWxfh/b/QsoZd6QFClxt/e8CxhmQ0CAp Received-SPF: none client-ip=212.227.126.134; envelope-from=jean@abou-samra.fr; helo=mout.kundenserver.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_NONE=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: , 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:140528 Archived-At: > Le 31 oct. 2022 =C3=A0 09:59, Heime a =C3=A9c= rit : >=20 > Yes, I have got really confused about what symbols are exactly. Even > after reading several times. I have never seen anybody make a symbol, > only variables. So, what is a symbol? Imagine parents who are planning to have a child and decide they will call i= t, say Deborah. They will say things like =E2=80=9CI like the name Deborah b= etter than Mary=E2=80=9D. Those are sentences about the names themselves, no= t some children. The names don=E2=80=99t need children in order to exist as w= ords. Then, the child is born and sentences like =E2=80=9CDeborah weighs 3kg= =E2=80=9D (referring to the child named Deborah) start to make sense. When you do 'symbol in Lisp, this gives you a bare name, or a =E2=80=9Csymbo= l=E2=80=9D. With symbol-value, you get what value is associated with this sy= mbol, if any (the child with that name). But you don=E2=80=99t need a value b= ound to the symbol (a child called Deborah) before you start using the symbo= l itself (the name =E2=80=9CDeborah=E2=80=9D).=