From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.bugs Subject: bug#55395: What does (1 2 3 . #2) mean? Date: Fri, 13 May 2022 17:22:13 +0200 Message-ID: <87ilq931ay.fsf@gnus.org> References: <4B70C9BE-B784-4B74-A081-7A8B3F8D5136@acm.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="4717"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: 55395@debbugs.gnu.org, Stefan Monnier To: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri May 13 17:23:12 2022 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1npX8J-0000vS-Kp for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 13 May 2022 17:23:11 +0200 Original-Received: from localhost ([::1]:45416 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1npX8I-0001Fs-97 for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 13 May 2022 11:23:10 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:41176) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1npX8B-0001FP-5V for bug-gnu-emacs@gnu.org; Fri, 13 May 2022 11:23:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:50717) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1npX8A-0004tR-Sl for bug-gnu-emacs@gnu.org; Fri, 13 May 2022 11:23:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1npX8A-0002fU-Pm for bug-gnu-emacs@gnu.org; Fri, 13 May 2022 11:23:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Lars Ingebrigtsen Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 13 May 2022 15:23:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 55395 X-GNU-PR-Package: emacs Original-Received: via spool by 55395-submit@debbugs.gnu.org id=B55395.165245534610157 (code B ref 55395); Fri, 13 May 2022 15:23:02 +0000 Original-Received: (at 55395) by debbugs.gnu.org; 13 May 2022 15:22:26 +0000 Original-Received: from localhost ([127.0.0.1]:44609 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1npX7a-0002dl-7n for submit@debbugs.gnu.org; Fri, 13 May 2022 11:22:26 -0400 Original-Received: from quimby.gnus.org ([95.216.78.240]:38692) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1npX7Z-0002dV-75 for 55395@debbugs.gnu.org; Fri, 13 May 2022 11:22:25 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Message-ID :In-Reply-To:Date:References:Subject:Cc:To:From:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=wh7aUAW5EiIGtGnrLiJyBR4B71+5aJ3/ARis/ADol5M=; b=b07IHX4IF56vZIAx0cExWM2wB/ 59A6iTSQ6vSg085trSEH+QKsuuDk1Pv4IU6M8ngf/ThjPoAZmdvyXdKxGJyAmLXZ8p/5gPJ69kPbM PYbgy5an9H+0lW2w8TCdHJzpny5fWffl6qq4VhJL3CCesRLi0S/hetn86FenqihgZQCI=; Original-Received: from [84.212.220.105] (helo=xo) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1npX7O-00020w-1j; Fri, 13 May 2022 17:22:16 +0200 X-Now-Playing: Colourbox's _Colourbox (PolyGram)_: "Baby I Love You So" In-Reply-To: <4B70C9BE-B784-4B74-A081-7A8B3F8D5136@acm.org> ("Mattias =?UTF-8?Q?Engdeg=C3=A5rd?="'s message of "Fri, 13 May 2022 13:32:34 +0200") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:232163 Archived-At: Mattias Engdeg=C3=A5rd writes: > It may have made more sense before the switch of cycle-detection algorith= m from Floyd to Brent. This can be fixed by hand-coding the list iteration = and explicitly remembering the index of the tortoise, but would that be cor= rect? What's the spec? I don't think I've ever considered #x to be meaningful outside of print-circle, but I guess if we wanted to have some semantics here, I think I would have expected the index of the tortoise? But... > If #N means 'Nth object from the top along the path to the current object= , starting at 0' then we should have > > (rho 2 3) =3D> (1 2 3 4 5 . #2) > (list (rho 2 3)) =3D> ((1 2 3 4 5 . #3)) > > ie, adding the print depth to the index in the list. Do you agree? I've added Stefan to the CCs; I'm sure he has an opinion. --=20 (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no