From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: carlmarcos--- via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Executing function only if another function is defined Date: Sun, 24 Jul 2022 13:35:15 +0200 (CEST) Message-ID: Reply-To: carlmarcos@tutanota.com Mime-Version: 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="6149"; mail-complaints-to="usenet@ciao.gmane.io" To: Help Gnu Emacs Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sun Jul 24 13:35:45 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 1oFZth-0001Ok-Hk for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 24 Jul 2022 13:35:45 +0200 Original-Received: from localhost ([::1]:53974 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oFZtg-0001LK-3s for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 24 Jul 2022 07:35:44 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:49348) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oFZtG-0001LB-KJ for help-gnu-emacs@gnu.org; Sun, 24 Jul 2022 07:35:18 -0400 Original-Received: from w1.tutanota.de ([81.3.6.162]:36712) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oFZtE-0000g9-Ur for help-gnu-emacs@gnu.org; Sun, 24 Jul 2022 07:35:18 -0400 Original-Received: from w3.tutanota.de (unknown [192.168.1.164]) by w1.tutanota.de (Postfix) with ESMTP id 36E8CFBF70B for ; Sun, 24 Jul 2022 11:35:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1658662515; s=s1; d=tutanota.com; h=From:From:To:To:Subject:Subject:Content-Description:Content-ID:Content-Type:Content-Type:Content-Transfer-Encoding:Content-Transfer-Encoding:Cc:Date:Date:In-Reply-To:MIME-Version:MIME-Version:Message-ID:Message-ID:Reply-To:References:Sender; bh=fx3mbCeeB+9mXv/JX6+k4/wjklgxrXOz5GTBb1PJAPI=; b=2bm4rGE+5S42YSg6r0CTQDeu0UU6vAzLN0MbygBtUVUfLr/R+W2fOlDSFuDeeeP9 LOBxAGTY5+y0OeYxhQRSw3tyhdc8mCJ0yvoklOcKWErNFpu5qsT1hMl28TSkp/zhXRM 19HnB7N8O2u0r8s42sFPFfGio+Ic3uJdzUbaTQlby4UjTFXmISsvh6hxeqtpXFJns4c EzsT3gyXmo6zaXJER6GSCVOL+aqngHi6Z05O4n97lF2D3WczDGpzl3QSFPfegJI0tEP byIkKd4s2elun2Bll4SlCfNYXBduFb4Ep6XGnCsur/OCPR8ju/huDcnCLKSErf61tGC C2YN4k1ZJg== Received-SPF: pass client-ip=81.3.6.162; envelope-from=carlmarcos@tutanota.com; helo=w1.tutanota.de 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, SPF_HELO_PASS=-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: 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" Xref: news.gmane.io gmane.emacs.help:138589 Archived-At: The following function appends additional text to the `docstring' of the fu= nction `toucan'. Because it may be possible that some functions are not available (e.g. duri= ng testing or debugging phases), I would like to test whether the function = `toucan' has been defined before I call `docboost'.=C2=A0 What can I do?=20 (defun toucan-usage () =C2=A0 "TODO" =C2=A0=C2=A0=C2=A0 =C2=A0 (docboost 'toucan "Usage Information"))