From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jean Louis Newsgroups: gmane.emacs.help Subject: How to test if symbol from string exists? Date: Fri, 16 Apr 2021 12:09:22 +0300 Message-ID: Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="18311"; 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 Fri Apr 16 11:11:28 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 1lXKVa-0004aE-Q0 for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 16 Apr 2021 11:11:26 +0200 Original-Received: from localhost ([::1]:52472 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lXKVZ-0003By-TC for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 16 Apr 2021 05:11:25 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:40530) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lXKUY-0003Ai-LG for help-gnu-emacs@gnu.org; Fri, 16 Apr 2021 05:10:22 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:40463) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lXKUP-0001A4-GJ for help-gnu-emacs@gnu.org; Fri, 16 Apr 2021 05:10:16 -0400 Original-Received: from localhost ([::ffff:197.157.34.191]) (AUTH: PLAIN securesender, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 00000000000280CA.0000000060795453.00006B1D; Fri, 16 Apr 2021 02:09:38 -0700 Received-SPF: pass client-ip=217.170.207.13; envelope-from=support1@rcdrun.com; helo=stw1.rcdrun.com 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_PASS=-0.001, SPF_PASS=-0.001 autolearn=no 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:129005 Archived-At: I would like to test if symbol exists and is true. First I have string, like "people", then I can do this: (symbol-value (intern "rcd-db-people-mode-map")) and it gives me result. But before asking for the value, I would like to test if symbol exists. So I am trying this: (bound-and-true-p (intern "rcd-db-people-mode-map")) and I get error: Wrong type argument: symbolp, (intern "rcd-db-people-mode-map") as what I am trying to accomplish is to stop updating this function with the one below that still does not work: (defun rcd-db-table-mode-map (table) (cond ((string= "accounts" table) rcd-db-accounts-mode-map) ((string= "acks" table) rcd-db-acks-mode-map) ((string= "addressbookentries" table) rcd-db-addressbookentries-mode-map) ((string= "areas" table) rcd-db-areas-mode-map) ((string= "categories" table) rcd-db-categories-mode-map) ((string= "countries" table) rcd-db-countries-mode-map) ((string= "devt" table) rcd-db-devt-mode-map) ((string= "edit" table) rcd-db-edit-mode-map) ((string= "emails" table) rcd-db-emails-mode-map) ((string= "groups" table) rcd-db-groups-mode-map) ((string= "locationsets" table) rcd-db-locationsets-mode-map) ((string= "mailinglistoptions" table) rcd-db-mailinglistoptions-mode-map) ((string= "notes" table) rcd-db-notes-mode-map) ((string= "pages" table) rcd-db-pages-mode-map) ((string= "people" table) rcd-db-people-mode-map) ((string= "skills" table) rcd-db-skills-mode-map) ((string= "sms" table) rcd-db-sms-mode-map) ((string= "statsdefinitions" table) rcd-db-statsdefinitions-mode-map) (t rcd-db-mode-map))) so I would like replacing above function with the one here below, which is now not working until I solve the problem how to verify for the symbol existence, which symbol name I get from string. (defun rcd-db-table-mode-map (table) (let ((symbol (intern (format "rcd-db-%s-mode-map" table)))) (if (bound-and-true-p symbol) (symbol-value symbol) rcd-db-mode-map))) Thank you, Jean