From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Pascal J. Bourguignon" Newsgroups: gmane.emacs.help Subject: Re: Lexical binding and macros. Date: Sun, 12 Dec 2010 18:23:25 +0100 Organization: Informatimago Message-ID: <87r5dmkir6.fsf@kuiper.lan.informatimago.com> References: NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Trace: dough.gmane.org 1292262018 6090 80.91.229.12 (13 Dec 2010 17:40:18 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Mon, 13 Dec 2010 17:40:18 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Dec 13 18:40:12 2010 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 1PSCNf-0008U1-8w for geh-help-gnu-emacs@m.gmane.org; Mon, 13 Dec 2010 18:40:11 +0100 Original-Received: from localhost ([127.0.0.1]:44695 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PSBpu-00014w-EX for geh-help-gnu-emacs@m.gmane.org; Mon, 13 Dec 2010 12:05:18 -0500 Original-Path: usenet.stanford.edu!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 23 Original-X-Trace: individual.net Be0ZJi5lBVieQ/vwdlFmfAf+WZ4TC3qFdbanbGqvsLJ+jDLbcf Cancel-Lock: sha1:YWJlNjQzZjQ4ZWMyN2NlODNlMzY3N2FlZGMwNjY2ZWVmMWE5NzBiYg== sha1:Ks1u1LzxVQaTrHhmVn5RUCS04xs= Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAABlBMVEUAAAD///+l2Z/dAAAA oElEQVR4nK3OsRHCMAwF0O8YQufUNIQRGIAja9CxSA55AxZgFO4coMgYrEDDQZWPIlNAjwq9 033pbOBPtbXuB6PKNBn5gZkhGa86Z4x2wE67O+06WxGD/HCOGR0deY3f9Ijwwt7rNGNf6Oac l/GuZTF1wFGKiYYHKSFAkjIo1b6sCYS1sVmFhhhahKQssRjRT90ITWUk6vvK3RsPGs+M1RuR mV+hO/VvFAAAAABJRU5ErkJggg== X-Accept-Language: fr, es, en X-Disabled: X-No-Archive: no User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux) Original-Xref: usenet.stanford.edu gnu.emacs.help:183189 X-Mailman-Approved-At: Mon, 13 Dec 2010 12:00:01 -0500 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:77457 Archived-At: LanX writes: > On 12 Dez., 05:10, Barry Margolin wrote: >> In article , >>  Alin Soare wrote: >> >> > Are the macros and closures equivalent ? >> >> No.  Emacs Lisp has macros, it doesn't have closures.  But in dialects >> of Lisp that have both, they're completely different. > > > ehm ... isn't "lexical-let" from the common lisp extension supposed to > support closures? They're not really closures. Closures are equivalent to objects, so you can simulate them by creating a kind of object, and this is what lexical-let does. But given emacs lisp VM, it cannot do it quite efficiently. -- __Pascal Bourguignon__ http://www.informatimago.com/ A bad day in () is better than a good day in {}.