From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.help Subject: Re: Question about cl-flet and cl-letf Date: Sun, 29 Oct 2023 02:14:10 +0200 Message-ID: <87msw2gu99.fsf@web.de> References: <87pm11aw56.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="13996"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:GGnKmEywBnxLbOmEpt0i6NZgAgM= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sun Oct 29 02:14:28 2023 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 1qwtRk-0003S6-8z for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 29 Oct 2023 02:14:28 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qwtRX-00051W-3m; Sat, 28 Oct 2023 20:14:15 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qwtRV-00051N-Rz for help-gnu-emacs@gnu.org; Sat, 28 Oct 2023 20:14:13 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qwtRT-0000Up-CG for help-gnu-emacs@gnu.org; Sat, 28 Oct 2023 20:14:13 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1qwtRQ-00033R-MT for help-gnu-emacs@gnu.org; Sun, 29 Oct 2023 02:14:08 +0200 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: -13 X-Spam_score: -1.4 X-Spam_bar: - X-Spam_report: (-1.4 / 5.0 requ) BAYES_00=-1.9, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.25, 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-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:145411 Archived-At: Arash Esbati writes: > Michael Heerdegen writes: > > > No - they very different. `cl-flet' creates lexical bindings. Your > > `cl-letf' call OTOH temporarily changes the function binding of the > > symbol `y-or-n-p' - which more or less gives you dynamical binding. > > Thanks for your response. I basically want to temporarily make > `y-or-n-p' act like `always'; and from what I read in the docstrings, > both version should work, but `cl-flet' does not. Are the bindings > relevant in this case? Yes. Please read about scoping rules: (info "(elisp) Variable Scoping") the analogue rules apply for function bindings. When the call of `y-or-n-p' does not occur textually inside the `cl-flet' form, it will not be affected by a lexical function binding. Michael.