From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: Replacement for Common Lisp's GENSYM in Emacs Lisp Date: Sun, 07 Mar 2010 23:55:26 -0500 Message-ID: References: <87tysssj78.fsf@rapttech.com.au> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: dough.gmane.org 1272990667 7288 80.91.229.12 (4 May 2010 16:31:07 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 4 May 2010 16:31:07 +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 18:31:06 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 1O9L1P-0001dW-5H for geh-help-gnu-emacs@m.gmane.org; Tue, 04 May 2010 18:30:59 +0200 Original-Received: from localhost ([127.0.0.1]:38763 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1O9L1O-0005Sk-FX for geh-help-gnu-emacs@m.gmane.org; Tue, 04 May 2010 12:30:58 -0400 Original-Path: usenet.stanford.edu!postnews.google.com!news2.google.com!border1.nntp.dca.giganews.com!border2.nntp.dca.giganews.com!nntp.giganews.com!npeer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!post01.iad.highwinds-media.com!newsfe23.iad.POSTED!7564ea0f!not-for-mail Original-Newsgroups: gnu.emacs.help User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.93 (gnu/linux) Cancel-Lock: sha1:78vYkdHyAYqRa+lGN7iE39we/2M= Original-Lines: 19 Original-X-Complaints-To: abuse@UsenetServer.com Original-NNTP-Posting-Date: Mon, 08 Mar 2010 04:55:26 UTC X-Original-Bytes: 1494 Original-Xref: usenet.stanford.edu gnu.emacs.help:177396 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:72931 Archived-At: >> (defmacro dotimes (xl e) >> (let ((x (car xl)) >> (l (cadr xl))) >> `(let ((body (lambda (,x) ,e)) >> (list ,l)) >> (while (consp list) >> (funcall body (car list)) >> (setq list (cdr list)))))) >> >> Notice how the expressions `l' and `e' are evaluated in a context where >> neither of `body', nor `list' exist. No need for gensym. > What makes you think that body and list aren't bound in e? Nothing, but luckily it doesn't make any difference whether they are or not. Stefan