From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: User-defined record types, v2 Date: Sun, 19 Mar 2017 08:50:24 -0400 Message-ID: References: <86y3w2tt2n.fsf@molnjunk.nocrew.org> <86tw6qtt01.fsf@molnjunk.nocrew.org> <86k27mtsnv.fsf@molnjunk.nocrew.org> <86fuiatsh3.fsf@molnjunk.nocrew.org> <86bmsyts9f.fsf@molnjunk.nocrew.org> <8337eaxzc3.fsf@gnu.org> <8637eatm6f.fsf@molnjunk.nocrew.org> <86wpblsk0g.fsf@molnjunk.nocrew.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1489928435 7963 195.159.176.226 (19 Mar 2017 13:00:35 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 19 Mar 2017 13:00:35 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Mar 19 14:00:26 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 1cpaRe-0000Ti-Ca for ged-emacs-devel@m.gmane.org; Sun, 19 Mar 2017 14:00:26 +0100 Original-Received: from localhost ([::1]:56807 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cpaRf-0005Dj-4E for ged-emacs-devel@m.gmane.org; Sun, 19 Mar 2017 09:00:27 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:53586) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cpaRY-0005DP-Ca for emacs-devel@gnu.org; Sun, 19 Mar 2017 09:00:21 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cpaRT-0002K5-Bm for emacs-devel@gnu.org; Sun, 19 Mar 2017 09:00:19 -0400 Original-Received: from [195.159.176.226] (port=46777 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cpaRT-0002JK-57 for emacs-devel@gnu.org; Sun, 19 Mar 2017 09:00:15 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1cpaRJ-0007Tj-Lx for emacs-devel@gnu.org; Sun, 19 Mar 2017 14:00:05 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 21 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:gc6zITWLjUavnVVMKR/otae/A4U= 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:213152 Archived-At: >> But I'm not even sure we should enforce this in the `record` and >> `make-record` primitives. After all, it's not needed for safety. And >> since we allow (aset 0 ) we can circumvent this check >> anyway. > Not quite. `aset' does the check too. Hm... so this slows down every use of `aset` on records, 99.99% of which affect another slot anyway! > But then, so much else in Emacs depends on people doing sensible > things, so maybe no check is needed at all. Exactly. > If we come up with a need for a check, we know where to add it. If not, > I can just delete the unused code. That'd be my choice. Stefan