From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: RCS: (vc-next-action 1) only New Backend Date: Sun, 20 Sep 2015 09:03:16 +0300 Message-ID: <83k2rlpqzf.fsf@gnu.org> References: <87mvwjohyi.fsf@mat.ucm.es> <838u83r6hl.fsf@gnu.org> <87k2rn5ucg.fsf@mat.ucm.es> <837fnmrizs.fsf@gnu.org> <877fnm4wzn.fsf@mat.ucm.es> <876136lr83.fsf@fencepost.gnu.org> <83y4g2pxh3.fsf@gnu.org> <871tdulodu.fsf@fencepost.gnu.org> <83twqqpu91.fsf@gnu.org> <55FD87DE.3030506@yandex.ru> <83pp1epb17.fsf@gnu.org> <55FD9E4D.8080909@yandex.ru> <83lhc2pae8.fsf@gnu.org> <55FDBB3B.1070706@yandex.ru> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1442729020 986 80.91.229.3 (20 Sep 2015 06:03:40 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 20 Sep 2015 06:03:40 +0000 (UTC) Cc: oub@mat.ucm.es, dak@gnu.org, emacs-devel@gnu.org To: Dmitry Gutov Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Sep 20 08:03:31 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 1ZdXij-0006QU-D3 for ged-emacs-devel@m.gmane.org; Sun, 20 Sep 2015 08:03:29 +0200 Original-Received: from localhost ([::1]:50155 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZdXii-0003Qd-Kx for ged-emacs-devel@m.gmane.org; Sun, 20 Sep 2015 02:03:28 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:53557) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZdXiV-0003QO-Ls for emacs-devel@gnu.org; Sun, 20 Sep 2015 02:03:16 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZdXiU-0003mL-Ov for emacs-devel@gnu.org; Sun, 20 Sep 2015 02:03:15 -0400 Original-Received: from mtaout29.012.net.il ([80.179.55.185]:57201) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZdXiR-0003kl-0k; Sun, 20 Sep 2015 02:03:11 -0400 Original-Received: from conversion-daemon.mtaout29.012.net.il by mtaout29.012.net.il (HyperSendmail v2007.08) id <0NUY00800OP4CQ00@mtaout29.012.net.il>; Sun, 20 Sep 2015 09:03:46 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([84.94.185.246]) by mtaout29.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NUY0033OOUAGS60@mtaout29.012.net.il>; Sun, 20 Sep 2015 09:03:46 +0300 (IDT) In-reply-to: <55FDBB3B.1070706@yandex.ru> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 80.179.55.185 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:190120 Archived-At: > Cc: dak@gnu.org, oub@mat.ucm.es, emacs-devel@gnu.org > From: Dmitry Gutov > Date: Sat, 19 Sep 2015 22:44:59 +0300 > > On 09/19/2015 08:49 PM, Eli Zaretskii wrote: > > > I think an optional argument that any back-end is free to ignore has a > > very low (though non-zero) cost. > > Either way, it's inappropriate, considering that so few backends support > this. The only reason to have it is to try to preserve the feature that > some users rely on. I don't see how it could be "inappropriate". Different back-ends have different features, and you cannot always have unified APIs without losing some features, unless you accept the notion of optional arguments that some back-ends will ignore.