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: Why is booleanp defined this way? Date: Sat, 18 Apr 2015 03:23:22 +0200 Organization: Informatimago Message-ID: <87fv7ymdpx.fsf@kuiper.lan.informatimago.com> References: <87siby7au6.fsf@mbork.pl> <877ftapd6v.fsf@debian.uxu> <87oammmfn4.fsf@kuiper.lan.informatimago.com> <871tjint39.fsf@debian.uxu> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1429320748 29502 80.91.229.3 (18 Apr 2015 01:32:28 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 18 Apr 2015 01:32:28 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sat Apr 18 03:32:19 2015 Return-path: Envelope-to: geh-help-gnu-emacs@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 1YjHcI-00082U-Rf for geh-help-gnu-emacs@m.gmane.org; Sat, 18 Apr 2015 03:32:18 +0200 Original-Received: from localhost ([::1]:44196 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YjHcI-0006j9-7h for geh-help-gnu-emacs@m.gmane.org; Fri, 17 Apr 2015 21:32:18 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:35113) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YjHc8-0006j1-Gn for help-gnu-emacs@gnu.org; Fri, 17 Apr 2015 21:32:09 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YjHc5-0006jc-B7 for help-gnu-emacs@gnu.org; Fri, 17 Apr 2015 21:32:08 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:42006) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YjHc5-0006jV-3x for help-gnu-emacs@gnu.org; Fri, 17 Apr 2015 21:32:05 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1YjHc3-0007pa-Ek for help-gnu-emacs@gnu.org; Sat, 18 Apr 2015 03:32:03 +0200 Original-Received: from amontsouris-654-1-71-164.w82-123.abo.wanadoo.fr ([82.123.138.164]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 18 Apr 2015 03:32:03 +0200 Original-Received: from pjb by amontsouris-654-1-71-164.w82-123.abo.wanadoo.fr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 18 Apr 2015 03:32:03 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 28 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: amontsouris-654-1-71-164.w82-123.abo.wanadoo.fr Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAABlBMVEUAAAD///+l2Z/dAAAA oElEQVR4nK3OsRHCMAwF0O8YQufUNIQRGIAja9CxSA55AxZgFO4coMgYrEDDQZWPIlNAjwq9 033pbOBPtbXuB6PKNBn5gZkhGa86Z4x2wE67O+06WxGD/HCOGR0deY3f9Ijwwt7rNGNf6Oac l/GuZTF1wFGKiYYHKSFAkjIo1b6sCYS1sVmFhhhahKQssRjRT90ITWUk6vvK3RsPGs+M1RuR mV+hO/VvFAAAAABJRU5ErkJggg== X-Accept-Language: fr, es, en User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) Cancel-Lock: sha1:N2Y3MDQ2NWExZTIxMzNmOWZmZTg4N2M2ZTM1N2MwMDgzNDk4N2EwOQ== X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:103792 Archived-At: Emanuel Berg writes: > Are you saying (not (not x)) generates more efficient > byte-code? I hate to break it to you, but the > Commodore 64 demo era is long gone :) That's what I'm saying, in the case of a lisp VM (emacs lisp, clisp). In the case of a not too dumb native compiler, both should generate the same native code. >>> So I think `booleanp' shouldn't be thought of as >>> a normalizer but rather as a type predicate, much >>> like them `stringp', `integerp', and so on. >> >> Of course. That's what the "p" in "booleanp" means! > > If that is "of course" then what are we talking about? I'm just stating that you are stating the obvious. Obviously :-) -- __Pascal Bourguignon__ http://www.informatimago.com/ “The factory of the future will have only two employees, a man and a dog. The man will be there to feed the dog. The dog will be there to keep the man from touching the equipment.” -- Carl Bass CEO Autodesk