From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: [RFC] caar/cadr/cdar/cddr Date: Thu, 12 Jul 2012 15:43:09 -0700 Organization: UCLA Computer Science Department Message-ID: <4FFF52FD.1050209@cs.ucla.edu> References: <4FFEFA98.3060509@yandex.ru> <4FFF00F9.4070806@cs.ucla.edu> <4FFF0CE4.2020706@yandex.ru> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1342133007 15375 80.91.229.3 (12 Jul 2012 22:43:27 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Thu, 12 Jul 2012 22:43:27 +0000 (UTC) Cc: Emacs development discussions To: Dmitry Antipov Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Jul 13 00:43:26 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 1SpS6X-0002wK-5P for ged-emacs-devel@m.gmane.org; Fri, 13 Jul 2012 00:43:25 +0200 Original-Received: from localhost ([::1]:57141 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SpS6V-0006wD-PQ for ged-emacs-devel@m.gmane.org; Thu, 12 Jul 2012 18:43:23 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:55052) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SpS6T-0006w8-6L for emacs-devel@gnu.org; Thu, 12 Jul 2012 18:43:22 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SpS6R-0002wD-Pd for emacs-devel@gnu.org; Thu, 12 Jul 2012 18:43:21 -0400 Original-Received: from smtp.cs.ucla.edu ([131.179.128.62]:46436) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SpS6R-0002oM-Jr for emacs-devel@gnu.org; Thu, 12 Jul 2012 18:43:19 -0400 Original-Received: from localhost (localhost.localdomain [127.0.0.1]) by smtp.cs.ucla.edu (Postfix) with ESMTP id C4F6339E800B; Thu, 12 Jul 2012 15:43:11 -0700 (PDT) X-Virus-Scanned: amavisd-new at smtp.cs.ucla.edu Original-Received: from smtp.cs.ucla.edu ([127.0.0.1]) by localhost (smtp.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DBTYMC-0CIac; Thu, 12 Jul 2012 15:43:11 -0700 (PDT) Original-Received: from [192.168.1.4] (pool-108-23-119-2.lsanca.fios.verizon.net [108.23.119.2]) by smtp.cs.ucla.edu (Postfix) with ESMTPSA id 5717A39E8008; Thu, 12 Jul 2012 15:43:11 -0700 (PDT) User-Agent: Mozilla/5.0 (X11; Linux i686; rv:13.0) Gecko/20120615 Thunderbird/13.0.1 In-Reply-To: <4FFF0CE4.2020706@yandex.ru> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 131.179.128.62 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:151569 Archived-At: On 07/12/2012 10:44 AM, Dmitry Antipov wrote: > This Fcaar is 6 insns smaller than the obvious CAR (CAR (x)) And it also loops forever when given a pair whose car is itself. Let's stick with the obvious and reliable version, if we need this sort of thing (we don't have performance numbers yet).