From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: Emacs 26.1 release branch created Date: Mon, 25 Sep 2017 15:25:11 -0700 Organization: UCLA Computer Science Department Message-ID: References: <20170922193511.GC7229@ACM> <20170922220700.GD7229@ACM> <20170924143939.GC5725@ACM> <20170924194139.GA6793@ACM> <20170925190357.GA4651@ACM> <855b1231-2279-4fd7-a2d6-be65435bb8be@default> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Trace: blaine.gmane.org 1506378360 10790 195.159.176.226 (25 Sep 2017 22:26:00 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 25 Sep 2017 22:26:00 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 To: Drew Adams , Alan Mackenzie , emacs-devel@gnu.org, Eli Zaretskii , rms@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Sep 26 00:25:56 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 1dwbp5-0002Vm-LL for ged-emacs-devel@m.gmane.org; Tue, 26 Sep 2017 00:25:55 +0200 Original-Received: from localhost ([::1]:44581 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dwbpC-0002Ld-RB for ged-emacs-devel@m.gmane.org; Mon, 25 Sep 2017 18:26:02 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:60573) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dwboY-0002Jk-Kk for emacs-devel@gnu.org; Mon, 25 Sep 2017 18:25:23 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dwboX-0000ez-JG for emacs-devel@gnu.org; Mon, 25 Sep 2017 18:25:22 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:36478) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dwboS-0000dR-P0; Mon, 25 Sep 2017 18:25:16 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id EB6E5160CFC; Mon, 25 Sep 2017 15:25:12 -0700 (PDT) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id 50eQOlWCSdhi; Mon, 25 Sep 2017 15:25:12 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 319CC160CFE; Mon, 25 Sep 2017 15:25:12 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id jWT6yOsBhKzB; Mon, 25 Sep 2017 15:25:12 -0700 (PDT) Original-Received: from Penguin.CS.UCLA.EDU (Penguin.CS.UCLA.EDU [131.179.64.200]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 170E7160CFC; Mon, 25 Sep 2017 15:25:12 -0700 (PDT) In-Reply-To: Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 131.179.128.68 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:218789 Archived-At: On 09/25/2017 01:24 PM, John Wiegley wrote: > Why not mention both ways of resolving the matter in the documentation? > (message "%s") for all the simple cases (which should be most of them),= and > let-binding text-quoting-style for the complex cases. Because the complex cases are where the let-binding style falls down.=20 For example, this plausible-looking code: =C2=A0=C2=A0 (let ((text-quoting-style 'grave)) =C2=A0=C2=A0 =C2=A0 (message "(setq coding-system '%S)" =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (fi= nd-operation-coding-system 'write-region "x"))) is incorrect, because it changes the quoting style not just for the=20 message, but also for the internals of find-operation-coding-system,=20 internals that are unrelated to the message and which will behave=20 contrary to user preference. In contrast, this: =C2=A0 (message "%s" (format "(setq coding-system '%S)" =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (find-= operation-coding-system 'write-region "x"))) limits the style override to just the format, which is what is typically=20 wanted for messages.As the size of the 'let' increases, this sort of=20 error becomes more likely. The let-binding approach is appropriate only for simple cases where you=20 know all the code that will be executed inside the 'let', and know that=20 you want to override user preference for all of the code. It is=20 inflexible and error-prone compared to the easier-to-use '(message "%s"=20 ...)' style that Emacs has used for decades.This is not a close call: we=20 should document what has worked rather than try to promote an=20 experimental alternative that has no significant technical advantages.