From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Unary / Date: Thu, 15 Oct 2015 09:31:02 -0400 Message-ID: References: <87pp0gweri.fsf@fencepost.gnu.org> <22047.37539.943171.429065@turnbull.sk.tsukuba.ac.jp> <877fmouyt3.fsf@gnu.org> <87d1wgwclb.fsf@fencepost.gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1444915959 7978 80.91.229.3 (15 Oct 2015 13:32:39 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 15 Oct 2015 13:32:39 +0000 (UTC) Cc: "Stephen J. Turnbull" , emacs-devel@gnu.org To: David Kastrup Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Oct 15 15:32:29 2015 Return-path: Envelope-to: ged-emacs-devel@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 1Zmidt-0003CG-Db for ged-emacs-devel@m.gmane.org; Thu, 15 Oct 2015 15:32:25 +0200 Original-Received: from localhost ([::1]:47516 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zmidn-0004UR-Qs for ged-emacs-devel@m.gmane.org; Thu, 15 Oct 2015 09:32:19 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:44253) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zmicf-0004Pd-HD for emacs-devel@gnu.org; Thu, 15 Oct 2015 09:31:10 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zmice-00017n-P2 for emacs-devel@gnu.org; Thu, 15 Oct 2015 09:31:09 -0400 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.181]:59648) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zmica-00016c-C2; Thu, 15 Oct 2015 09:31:04 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0A+FgA731xV/0qOCkxcgxCEAoVVwwsEAgKBPD0QAQEBAQEBAYEKQQWDXQEBAwFWIwULCw4mEhQYDSSINwjPIwEBAQcCAR+LOoUFB4QtBbM/gUUjgWaCLiKCeAEBAQ X-IPAS-Result: A0A+FgA731xV/0qOCkxcgxCEAoVVwwsEAgKBPD0QAQEBAQEBAYEKQQWDXQEBAwFWIwULCw4mEhQYDSSINwjPIwEBAQcCAR+LOoUFB4QtBbM/gUUjgWaCLiKCeAEBAQ X-IronPort-AV: E=Sophos;i="5.13,465,1427774400"; d="scan'208";a="169631608" Original-Received: from 76-10-142-74.dsl.teksavvy.com (HELO pastel.home) ([76.10.142.74]) by ironport2-out.teksavvy.com with ESMTP; 15 Oct 2015 09:31:03 -0400 Original-Received: by pastel.home (Postfix, from userid 20848) id F079E6287E; Thu, 15 Oct 2015 09:31:02 -0400 (EDT) In-Reply-To: <87d1wgwclb.fsf@fencepost.gnu.org> (David Kastrup's message of "Thu, 15 Oct 2015 14:17:04 +0200") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 206.248.154.181 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:191641 Archived-At: > Ah, so there will not be a lot of legacy code relying on the current > semantics. This would be [...] > Since there are about a dozen apparently unrelated changes, the question > is whether anything specifically relied on this change. I don't remember the specific case that motivated the change. IIRC I changed it mostly because the limitation was arbitrary (as you can see in the patch, which doesn't actually change the code). I didn't know that CL had decided to give a completely different meaning to the unary / than the natural generalization of the behavior of (/ X1 X2 ... Xn). It seems backward to me, so I guess my sense of aesthetics would incite me to simply revert my patch, adding a comment that for the semantics of the unary / there is a conflict between the natural choice and CL compatibility. Stefan