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: Change in files.el Date: Sat, 28 Jan 2017 12:42:22 -0500 Message-ID: References: <83mvebzh0k.fsf@gnu.org> <83bmurz0y9.fsf@gnu.org> <8360kzyxor.fsf@gnu.org> <83ziibxg7j.fsf@gnu.org> <83y3xvxfbs.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1485625380 3423 195.159.176.226 (28 Jan 2017 17:43:00 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 28 Jan 2017 17:43:00 +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 Sat Jan 28 18:42:56 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 1cXX1c-0000Ux-AX for ged-emacs-devel@m.gmane.org; Sat, 28 Jan 2017 18:42:56 +0100 Original-Received: from localhost ([::1]:52686 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cXX1h-0000Wz-RY for ged-emacs-devel@m.gmane.org; Sat, 28 Jan 2017 12:43:01 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:50729) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cXX1P-0000QT-MQ for emacs-devel@gnu.org; Sat, 28 Jan 2017 12:42:44 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cXX1M-00042b-Kj for emacs-devel@gnu.org; Sat, 28 Jan 2017 12:42:43 -0500 Original-Received: from [195.159.176.226] (port=33866 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cXX1M-000425-Dm for emacs-devel@gnu.org; Sat, 28 Jan 2017 12:42:40 -0500 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1cXX1A-0006kp-Kg for emacs-devel@gnu.org; Sat, 28 Jan 2017 18:42:28 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 20 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:PtgVywcW75PezWsZaXGwQxJBXXc= 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:211706 Archived-At: >> Anyway, I definitely see what you mean. I just disagree on the >> seriousness of the problem, and on the impact of the guideline on it. > The issue is not serious enough to prevent people from using the > methods you'd like to see, but I question the wisdom of having a > project-wide guidelines to _always_ use them is similar situations. I think the benefits are the following: - (eventually) more consistency, such as knowing that you can use `add-function` will work right on any *-predicate or *-function variable. - until recently, it was common for such variables to have a nil default value. Without an active effort to reverse this, we'll always end up with such new variables introduced with a nil default value (especially since it's very common for new such variables to have a trivial default behavior, and only accumulating complexity later on, at which point it's a lot more difficult to change the default to be non-nil). Stefan