From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.devel Subject: Use of `window-system' as a predicate is deprecated. Why? Date: Sat, 9 Jul 2022 12:22:41 +0000 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="30442"; mail-complaints-to="usenet@ciao.gmane.io" To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Jul 09 14:23:48 2022 Return-path: Envelope-to: ged-emacs-devel@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 1oA9Ux-0007qZ-Py for ged-emacs-devel@m.gmane-mx.org; Sat, 09 Jul 2022 14:23:47 +0200 Original-Received: from localhost ([::1]:49718 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oA9Uw-0006j6-D9 for ged-emacs-devel@m.gmane-mx.org; Sat, 09 Jul 2022 08:23:46 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:35062) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oA9Tz-000621-8L for emacs-devel@gnu.org; Sat, 09 Jul 2022 08:22:47 -0400 Original-Received: from colin.muc.de ([193.149.48.1]:33248 helo=mail.muc.de) by eggs.gnu.org with smtp (Exim 4.90_1) (envelope-from ) id 1oA9Tx-00043a-6V for emacs-devel@gnu.org; Sat, 09 Jul 2022 08:22:46 -0400 Original-Received: (qmail 61861 invoked by uid 3782); 9 Jul 2022 12:22:42 -0000 Original-Received: from acm.muc.de (p4fe15f65.dip0.t-ipconnect.de [79.225.95.101]) (using STARTTLS) by colin.muc.de (tmda-ofmipd) with ESMTP; Sat, 09 Jul 2022 14:22:42 +0200 Original-Received: (qmail 6486 invoked by uid 1000); 9 Jul 2022 12:22:41 -0000 Content-Disposition: inline X-Submission-Agent: TMDA/1.3.x (Ph3nix) X-Primary-Address: acm@muc.de Received-SPF: pass client-ip=193.149.48.1; envelope-from=acm@muc.de; helo=mail.muc.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, SPF_HELO_NONE=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: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:291984 Archived-At: Hello, Emacs. The doc string for window-system and its Elisp manual entry say that the function should not be used. The manual entry says: Do _not_ use `window-system' and `initial-window-system' as predicates or boolean flag variables, if you want to write code that works differently on text terminals and graphic displays. That is because `window-system' is not a good indicator of Emacs capabilities on a given display type. Instead, use `display-graphic-p' or any of the other `display-*-p' predicates described in Display Feature Testing. .. I am amending minibuf.c and wish to know only whether the current terminal->focus_frame_hook is validly set. The manual entry seems to be to be unnecessarily patronising. It insinuates that the only possible "capabilities" a user could be interested in are graphic capabilities. Surely I should not have to go such ridiculous lengths as calling a lisp function which has nothing to do with what I need, and then interpreting its result. So, how should I find out whether terminal->focus_frame_hook is valid or not, if I'm not allowed to use Fwindow_system? -- Alan Mackenzie (Nuremberg, Germany).