From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Drew Adams" Newsgroups: gmane.emacs.devel Subject: RE: mode-line-format - local variableness Date: Sun, 5 Apr 2009 16:37:18 -0700 Message-ID: <004b01c9b647$75e428f0$0200a8c0@us.oracle.com> References: <004901c9b63c$77c768e0$0200a8c0@us.oracle.com> <004a01c9b646$5b15efa0$0200a8c0@us.oracle.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1238974653 32217 80.91.229.12 (5 Apr 2009 23:37:33 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 5 Apr 2009 23:37:33 +0000 (UTC) To: "=?iso-8859-1?Q?'Johan_=22Bockg=E5rd=22'?=" , Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Apr 06 01:38:51 2009 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1LqbvO-0006qH-83 for ged-emacs-devel@m.gmane.org; Mon, 06 Apr 2009 01:38:50 +0200 Original-Received: from localhost ([127.0.0.1]:51588 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Lqbtz-00074b-Vs for ged-emacs-devel@m.gmane.org; Sun, 05 Apr 2009 19:37:24 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Lqbtu-00074M-C2 for emacs-devel@gnu.org; Sun, 05 Apr 2009 19:37:18 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1Lqbtp-000749-M5 for emacs-devel@gnu.org; Sun, 05 Apr 2009 19:37:17 -0400 Original-Received: from [199.232.76.173] (port=42637 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Lqbtp-000745-HZ for emacs-devel@gnu.org; Sun, 05 Apr 2009 19:37:13 -0400 Original-Received: from acsinet12.oracle.com ([141.146.126.234]:57162) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1Lqbtp-00041D-0n for emacs-devel@gnu.org; Sun, 05 Apr 2009 19:37:13 -0400 Original-Received: from rgminet15.oracle.com (rcsinet15.oracle.com [148.87.113.117]) by acsinet12.oracle.com (Switch-3.3.1/Switch-3.3.1) with ESMTP id n35Nadeq017792 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sun, 5 Apr 2009 23:36:41 GMT Original-Received: from acsmt704.oracle.com (acsmt704.oracle.com [141.146.40.82]) by rgminet15.oracle.com (Switch-3.3.1/Switch-3.3.1) with ESMTP id n35NbBNC006507; Sun, 5 Apr 2009 23:37:12 GMT Original-Received: from dradamslap1 (/141.144.64.94) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sun, 05 Apr 2009 23:37:04 +0000 X-Mailer: Microsoft Office Outlook 11 In-Reply-To: <004a01c9b646$5b15efa0$0200a8c0@us.oracle.com> Thread-Index: Acm2QQdl6IEXqC5SS++JLf9HuVN37AAARGdQAAEsSsA= X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3350 X-Source-IP: acsmt704.oracle.com [141.146.40.82] X-Auth-Type: Internal IP X-CT-RefId: str=0001.0A010208.49D940A2.0079:SCFMA4539814,ss=1,fgs=0 X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 1) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:110077 Archived-At: Summary (with no understanding of why, beyond the catechismic don't-use-let-use-setq): This will not work: (defun foo (text &optional buffer) (with-current-buffer (or buffer (current-buffer)) (let ((mode-line-format text)) (force-mode-line-update) (sit-for 2)) (force-mode-line-update))) This works (ugh!): (defun foo (text &optional buffer) (with-current-buffer (or buffer (current-buffer)) (let ((old-mode-line-format mode-line-format)) (setq mode-line-format text) (force-mode-line-update) (sit-for 2) (setq mode-line-format old-mode-line-format)) (force-mode-line-update))) Don't `let'-bind `mode-line-format', but you can `let'-bind something to its value and then restore that later. Ugh!