From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.help Subject: Re: Temporary changing the behavior of a function Date: Fri, 06 Nov 2015 19:06:54 +0100 Message-ID: <87k2pvroht.fsf@web.de> References: <87lhaba0kh.fsf@mbork.pl> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1446833259 5047 80.91.229.3 (6 Nov 2015 18:07:39 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 6 Nov 2015 18:07:39 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Nov 06 19:07:30 2015 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZulQ5-0008MO-6Z for geh-help-gnu-emacs@m.gmane.org; Fri, 06 Nov 2015 19:07:25 +0100 Original-Received: from localhost ([::1]:40334 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZulQ4-0000Gy-Bb for geh-help-gnu-emacs@m.gmane.org; Fri, 06 Nov 2015 13:07:24 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:56502) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZulPs-0000Gg-Tp for help-gnu-emacs@gnu.org; Fri, 06 Nov 2015 13:07:13 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZulPo-0000ni-MD for help-gnu-emacs@gnu.org; Fri, 06 Nov 2015 13:07:12 -0500 Original-Received: from plane.gmane.org ([80.91.229.3]:36330) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZulPo-0000n1-Fv for help-gnu-emacs@gnu.org; Fri, 06 Nov 2015 13:07:08 -0500 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ZulPj-000849-OF for help-gnu-emacs@gnu.org; Fri, 06 Nov 2015 19:07:03 +0100 Original-Received: from ip-90-186-1-192.web.vodafone.de ([90.186.1.192]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 06 Nov 2015 19:07:03 +0100 Original-Received: from michael_heerdegen by ip-90-186-1-192.web.vodafone.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 06 Nov 2015 19:07:03 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 25 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: ip-90-186-1-192.web.vodafone.de User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) Cancel-Lock: sha1:+WDOi5bNeqGHJSXXosWAzEdouq8= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 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.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:107978 Archived-At: Marcin Borkowski writes: > so there is this function `foo', which calls the function `bar'. The > function `bar' is responsible for asking the user for some value and > passing that value to the guts of `foo'. > > Now I want to call `foo' in the Mafia-mode;-), i.e., it should ask no > further questions. What do I do? AFAIU, `cl-flet' won't help, since it > is lexical. The best I can think of is to temporarily advice `bar' with > :override - but then, instead of a `let'-like, local construct, I have > to explicitly add and then remove the advice, right? Apart from what already had been suggested, there are two more dirty alternatives: - Use `cl-letf' to create dynamical bindings on the place (symbol-function 'SYMBOL), instead of using `cl-flet'. A common trick in such situations. - If `bar' asks always the same questions, you can push your "answers" to `unread-command-events'. Just a workaround, but can save you from advising at all. Michael.