From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Gregory Heytings Newsgroups: gmane.emacs.help Subject: Re: How to test if symbol from string exists? Date: Fri, 16 Apr 2021 09:20:13 +0000 Message-ID: <7dee3f42358324b05f83@heytings.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="21410"; mail-complaints-to="usenet@ciao.gmane.io" Cc: help-gnu-emacs@gnu.org To: Jean Louis Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Apr 16 11:20:52 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 1lXKei-0005K0-3r for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 16 Apr 2021 11:20:52 +0200 Original-Received: from localhost ([::1]:56554 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lXKeh-00067w-8F for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 16 Apr 2021 05:20:51 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:42462) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lXKeF-00067H-BG for help-gnu-emacs@gnu.org; Fri, 16 Apr 2021 05:20:23 -0400 Original-Received: from heytings.org ([95.142.160.155]:44080) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lXKeA-0007EK-JT for help-gnu-emacs@gnu.org; Fri, 16 Apr 2021 05:20:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heytings.org; s=20210101; t=1618564814; bh=+SyMU5dKWmCfGiW4Xb+m9KnZD95gR+xZXZCZQiySph0=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References:From; b=VSXiSOM0I8pVKtBhqM/PIFpBESObS9+J/eUwKl7UhhCNs7mu6NbT6byhZqx3bvY3p tb8eUp0RdZLe98hyoSmopzQtBf6S0Siap/lsniU1TGkEhr57wSYGZvlnZrQr7sSROx iodX3nyhwPrOv04pims6ZNKIVNqHHVxn7OuJhoFAae0cyhPPPYdYvV8RUMDq3JG77s bguuxnD3JI84MQmzwIT8wF5EOI65Q/nH6edaIRH0ISdyEKDC1K/4Z5xi8ILwuTnrCp 5VaKJ+mfJabXB85ouGu8WKwcXI530OuVvcXz1A+1S0n+UyzGiHA+7Smbb7+rc6BpiL 62giwnSY+P1dw== In-Reply-To: Received-SPF: pass client-ip=95.142.160.155; envelope-from=gregory@heytings.org; helo=heytings.org 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 autolearn=ham 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:129006 Archived-At: > > 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") > That's because bound-and-true-p quotes its argument. You can use another macro for that: (defmacro bound-and-true-symbol-p (name) "Return the value of symbol with name NAME if it is bound, else nil." `(and (boundp (intern ,name)) (symbol-value (intern ,name))))