From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Lars Brinkhoff Newsgroups: gmane.emacs.devel Subject: Re: If records are not sequences, why does aref work on records? Date: Sat, 08 Apr 2017 17:24:53 +0200 Organization: nocrew Message-ID: <86efx22a7u.fsf@molnjunk.nocrew.org> References: <86pogo4vty.fsf@molnjunk.nocrew.org> <8360igof0k.fsf@gnu.org> <867f2w4qdk.fsf@molnjunk.nocrew.org> <0e6a0a16-8133-b2bc-404a-d0016f0c655e@cs.ucla.edu> <86h9202knq.fsf@molnjunk.nocrew.org> <4f2a1d4c-8703-4f07-a721-ea28c348631d@default> <864ly02i1m.fsf@molnjunk.nocrew.org> <7342364e-98f9-87d5-72d2-2f2d46d239f3@gmail.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: blaine.gmane.org 1491665127 29898 195.159.176.226 (8 Apr 2017 15:25:27 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 8 Apr 2017 15:25:27 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Apr 08 17:25:23 2017 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cwsEl-0006il-VN for ged-emacs-devel@m.gmane.org; Sat, 08 Apr 2017 17:25:16 +0200 Original-Received: from localhost ([::1]:55562 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cwsEr-0002dg-OW for ged-emacs-devel@m.gmane.org; Sat, 08 Apr 2017 11:25:21 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:59169) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cwsEg-0002ZD-1y for emacs-devel@gnu.org; Sat, 08 Apr 2017 11:25:10 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cwsEc-0002QC-Vd for emacs-devel@gnu.org; Sat, 08 Apr 2017 11:25:10 -0400 Original-Received: from [195.159.176.226] (port=52802 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cwsEc-0002PS-PB for emacs-devel@gnu.org; Sat, 08 Apr 2017 11:25:06 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1cwsEP-0004bO-R5 for emacs-devel@gnu.org; Sat, 08 Apr 2017 17:24:53 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 18 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:i2bL1Ydwq1cxP9Lm2W2/TBFkq4c= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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" Xref: news.gmane.org gmane.emacs.devel:213812 Archived-At: Clément Pit-Claudel wrote: > It doesn't need to: since vectors and lists are used, it's natural to > use vector and list functions on these objects. It goes further: the > cl-struct predicates are explicitly *documented* to work fine on > vectors: > > Given any Lisp object X, ‘(person-p X)’ returns true if X looks > like a ‘person’, and false otherwise. (Again, in Common Lisp this > predicate would be exact; in Emacs Lisp the best it can do is > verify that X is a vector of the correct length that starts with > the correct tag symbol.) Not any more. When I made my change, I found this part of the manual and deleted the text in parentheses. And also changed much of the other places you quoted. This is not to say that I weigh in on any side of this debate. I think both sides make good arguments.