From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: problems with flet on last emacs Date: Sat, 10 Nov 2012 18:38:53 -0500 Message-ID: References: <87pq8lnd7v.fsf@gmail.com> <87zk7oq5qr.fsf@kuiper.lan.informatimago.com> <871ul0j5ac.fsf@visionobjects.com> <877gurgae5.fsf@gmail.com> <87mx3m7jyd.fsf@googlemail.com> <8762aaljzd.fsf@gmail.com> <87ehohfkxo.fsf@kanis.fr> <871ukhhqua.fsf@googlemail.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1352590744 13837 80.91.229.3 (10 Nov 2012 23:39:04 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 10 Nov 2012 23:39:04 +0000 (UTC) Cc: Thierry Volpiatto , Ivan Kanis , emacs-devel@gnu.org To: =?iso-8859-1?Q?Jo=E3o_T=E1vora?= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Nov 11 00:39:14 2012 Return-path: Envelope-to: ged-emacs-devel@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 1TXKdt-0005JP-97 for ged-emacs-devel@m.gmane.org; Sun, 11 Nov 2012 00:39:13 +0100 Original-Received: from localhost ([::1]:60081 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TXKdj-0001PO-WB for ged-emacs-devel@m.gmane.org; Sat, 10 Nov 2012 18:39:03 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:36332) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TXKde-0001P4-Ap for emacs-devel@gnu.org; Sat, 10 Nov 2012 18:39:01 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TXKdb-00087l-8i for emacs-devel@gnu.org; Sat, 10 Nov 2012 18:38:58 -0500 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.182]:11903) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TXKdb-00087h-4a for emacs-devel@gnu.org; Sat, 10 Nov 2012 18:38:55 -0500 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av0EAG6Zu09sr+ZY/2dsb2JhbABEtBGBCIIWAQVWIxALNBIUGA0kiCG6CZBEA4hCmnGBWIMH X-IronPort-AV: E=Sophos;i="4.75,637,1330923600"; d="scan'208";a="206909788" Original-Received: from 108-175-230-88.dsl.teksavvy.com (HELO fmsmemgm.homelinux.net) ([108.175.230.88]) by ironport2-out.teksavvy.com with ESMTP/TLS/ADH-AES256-SHA; 10 Nov 2012 18:38:54 -0500 Original-Received: by fmsmemgm.homelinux.net (Postfix, from userid 20848) id E8EC3AE4B5; Sat, 10 Nov 2012 18:38:53 -0500 (EST) In-Reply-To: (=?iso-8859-1?Q?=22Jo=E3o_T=E1vora=22's?= message of "Sat, 10 Nov 2012 23:07:05 +0000") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 206.248.154.182 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:154813 Archived-At: > (let ((saved (symbol-function 'foo))) > (unwind-protect > (progn > (fset 'foo #'(lambda () > (message "bar!"))) > (meta-foo)) > (fset 'foo saved))) Same problem as with flet: the redefinition is hard to find, dynamically scoped, etc... Better use (defvar foo-bar nil) (defadvice foo (around blabla activate) (if foo-bar (message "bar!") ad-do-it)) and then ... (let ((foo-bar t)) ...) So C-h f foo RET will tell you about the redefinition and you can recover the non-redefined behavior with a simple (setq foo-bar nil). Stefan