From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: Is it alright to define-derived-mode dynamically? Date: Fri, 25 Dec 2020 12:34:23 -0500 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="38403"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:OGsmWSYatznVJpx3prgAbXosz34= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Dec 25 18:35:02 2020 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 1ksqzV-0009pH-BT for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 25 Dec 2020 18:35:01 +0100 Original-Received: from localhost ([::1]:41646 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ksqzU-0007oW-BB for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 25 Dec 2020 12:35:00 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:47604) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ksqz2-0007oH-N0 for help-gnu-emacs@gnu.org; Fri, 25 Dec 2020 12:34:32 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:45498) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ksqz1-0007P7-7i for help-gnu-emacs@gnu.org; Fri, 25 Dec 2020 12:34:32 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1ksqyy-0009CS-J6 for help-gnu-emacs@gnu.org; Fri, 25 Dec 2020 18:34:28 +0100 X-Injected-Via-Gmane: http://gmane.org/ Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io 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_NONE=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:126762 Archived-At: > Problem was invoking another derived mode from tabulated-list-mode > where the other mode did appear and it was populated but it was not > visible. The text I could not see but entries were there and the lines > in existence, just everything white. There can only be one major mode active in a buffer at a time. So whenever you call a major mode function, it "removes" the previously set major mode. >> - Don't use global variables's names for local variables. > > Did you mean: > > (defvar-local rcd-tabulated-marked-items nil > "Collects IDs for tabulated list modes") So, I meant "local" as in let-bound variables or in your particular case formal arguments of functions. Stefan