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: Fri, 07 Apr 2017 20:23:33 +0200 Organization: nocrew Message-ID: <864ly02i1m.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> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1491589473 5185 195.159.176.226 (7 Apr 2017 18:24:33 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 7 Apr 2017 18:24:33 +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 Fri Apr 07 20:24:29 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 1cwYYR-00084b-L7 for ged-emacs-devel@m.gmane.org; Fri, 07 Apr 2017 20:24:15 +0200 Original-Received: from localhost ([::1]:52149 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cwYYX-0006Ut-K2 for ged-emacs-devel@m.gmane.org; Fri, 07 Apr 2017 14:24:21 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:42722) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cwYY1-0006Uk-CR for emacs-devel@gnu.org; Fri, 07 Apr 2017 14:23:50 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cwYXw-0001da-6c for emacs-devel@gnu.org; Fri, 07 Apr 2017 14:23:49 -0400 Original-Received: from [195.159.176.226] (port=56106 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cwYXw-0001cy-05 for emacs-devel@gnu.org; Fri, 07 Apr 2017 14:23:44 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1cwYXn-0003rS-T5 for emacs-devel@gnu.org; Fri, 07 Apr 2017 20:23:35 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 17 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:L9iwSpcDA8u1+2DHSwPeHDeQ55g= 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:213770 Archived-At: Drew Adams wrote: > If the intention is to add a new kind of sequence, for > example to add a record type and have it be considered > a type of sequence, then I think it should support all > sequence features, just like other sequences. > > If it does not support everything intended by "sequence" > then I think we should not present it as a sequence. In > particular, it should not be documented as a sequence in > that case. > > As to what a sequence is, one guide is to refer to Common > Lisp, which carefully defines sequences and sequence > operations. So what do you think about the byte-code type, which supports many, but not all, sequence operations? Is that a long-standing bug?