From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Barry Margolin Newsgroups: gmane.emacs.help Subject: Re: How to put this in a macro Date: Fri, 16 Apr 2010 23:08:42 -0400 Organization: A noiseless patient Spider Message-ID: References: <87pr1zw164.fsf@linux-lqcw.site> NNTP-Posting-Host: lo.gmane.org X-Trace: dough.gmane.org 1273008380 16287 80.91.229.12 (4 May 2010 21:26:20 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 4 May 2010 21:26:20 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Tue May 04 23:26:18 2010 connect(): No such file or directory Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1O9PdB-0005bx-2Q for geh-help-gnu-emacs@m.gmane.org; Tue, 04 May 2010 23:26:17 +0200 Original-Received: from localhost ([127.0.0.1]:53029 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1O9PdA-0005g2-8x for geh-help-gnu-emacs@m.gmane.org; Tue, 04 May 2010 17:26:16 -0400 Original-Path: usenet.stanford.edu!news.glorb.com!news2.glorb.com!feeder.erje.net!feeder.eternal-september.org!eternal-september.org!barmar.motzarella.org!.POSTED!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 31 Injection-Date: Sat, 17 Apr 2010 03:08:43 +0000 (UTC) Injection-Info: barmar.motzarella.org; posting-host="+bxBiZT/p0ZLLuDb5H+JCw"; logging-data="24378"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+CdApG8UDolb8kJEO1mmw5" User-Agent: MT-NewsWatcher/3.5.3b3 (Intel Mac OS X) Cancel-Lock: sha1:yBUCK2fiwW4f3+Z8OEErgY502E0= Original-Xref: usenet.stanford.edu gnu.emacs.help:177737 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:73184 Archived-At: In article <87pr1zw164.fsf@linux-lqcw.site>, Cecil Westerhof wrote: > In my code I use the following code on several places: > (if (equal start end) > (setq start (point-min) > end (point-max)) > (setq start (or start (point-min))) > (setq end (or end (point-max)))) > > I think it would be good to put this in a macro. How would I write a > macro for this code? > > Or could it be done with a function? (defmacro canonicalize-start-end (start-var end-var) `(if (equal ,start-var ,end-var) (setq ,start-var (point-min) ,end-var (point-max)) (setq ,start-var (or ,start-var (point-min)) ,end-var (or ,end-var (point-max)))) You then use this as: (canonicalize-start-end start end) -- Barry Margolin, barmar@alum.mit.edu Arlington, MA *** PLEASE post questions in newsgroups, not directly to me *** *** PLEASE don't copy me on replies, I'll read them in the group ***