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: The purpose of makunbound Date: Thu, 19 Feb 2015 08:33:25 -0500 Message-ID: References: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1424352838 6272 80.91.229.3 (19 Feb 2015 13:33:58 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 19 Feb 2015 13:33:58 +0000 (UTC) Cc: Richard Stallman , emacs-devel@gnu.org To: Kelly Dean Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Feb 19 14:33:51 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 1YOREk-00087L-Du for ged-emacs-devel@m.gmane.org; Thu, 19 Feb 2015 14:33:50 +0100 Original-Received: from localhost ([::1]:56360 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YOREj-0003DD-Uo for ged-emacs-devel@m.gmane.org; Thu, 19 Feb 2015 08:33:49 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:50428) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YORET-00039U-2R for emacs-devel@gnu.org; Thu, 19 Feb 2015 08:33:33 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YORES-0000sX-BN for emacs-devel@gnu.org; Thu, 19 Feb 2015 08:33:33 -0500 Original-Received: from pruche.dit.umontreal.ca ([132.204.246.22]:53384) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YOREM-0000oM-RT; Thu, 19 Feb 2015 08:33:26 -0500 Original-Received: from fmsmemgm.homelinux.net (lechon.iro.umontreal.ca [132.204.27.242]) by pruche.dit.umontreal.ca (8.14.1/8.14.1) with ESMTP id t1JDXPoE023446; Thu, 19 Feb 2015 08:33:26 -0500 Original-Received: by fmsmemgm.homelinux.net (Postfix, from userid 20848) id 8748FAE11B; Thu, 19 Feb 2015 08:33:25 -0500 (EST) In-Reply-To: (Kelly Dean's message of "Thu, 19 Feb 2015 10:45:17 +0000") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) X-NAI-Spam-Flag: NO X-NAI-Spam-Threshold: 5 X-NAI-Spam-Score: 0 X-NAI-Spam-Rules: 1 Rules triggered RV5222=0 X-NAI-Spam-Version: 2.3.0.9393 : core <5222> : inlines <2238> : streams <1392856> : uri <1859322> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 132.204.246.22 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:183297 Archived-At: > To get rid of the ambiguity, I propose always using the term =E2=80=9Fvoi= d=E2=80=9D for what > makunbound sets, and using the =E2=80=9Fbind/unbind=E2=80=9D terminology = exclusively for the > kind of binding that =C2=ABlet=C2=BB does. Here's the problem: I don't see any difference between those two kinds of bindings and the implementation doesn't see them as different either. So if we try and distinguish them, we'll probably end up describing a semantics that doesn't match the implementation. > Just to be clear, the only reason there's any ambiguity in the first place > is because makunbound operates on non-global variables. Dynamically-scoped vars are global. Stefan