From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Re: Explanation Request for the Function set-transient-map in subr.el Date: Fri, 12 Nov 2021 09:41:07 -0500 Message-ID: References: Reply-To: Stefan Monnier Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="25590"; 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:ldE58GC8w4bvG4pPu8utjEN2f9E= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Nov 12 15:42:22 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 1mlXl0-0006TN-Lt for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 12 Nov 2021 15:42:22 +0100 Original-Received: from localhost ([::1]:35030 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mlXkz-00040t-F0 for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 12 Nov 2021 09:42:21 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:51302) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mlXk0-0003zV-O3 for help-gnu-emacs@gnu.org; Fri, 12 Nov 2021 09:41:21 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:46328) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mlXjz-0003XQ-5F for help-gnu-emacs@gnu.org; Fri, 12 Nov 2021 09:41:20 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1mlXjv-00056F-78 for help-gnu-emacs@gnu.org; Fri, 12 Nov 2021 15:41:15 +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=0.248, 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: 2.1.29 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:134537 Archived-At: > What does this section do? In what situations this-command gets called using > keys of the transient map but it is not equal to itself? What does mc mean? > > ((eq t keep-pred) >   (let ((mc (lookup-key map (this-command-keys-vector)))) >   ;; If the key is unbound `this-command` is >   ;; nil and so is `mc`. >     (and mc (eq this-command mc)))) It checks whether the user used one of the bindings from the `map` as opposed to one of the bindings from other active keymaps (e.g. the global map). Stefan