From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.bugs Subject: bug#18088: 24.4.50; `region-extract-function': (1) NEWS, (2) return value Date: Sat, 30 Apr 2016 00:31:11 +0200 Message-ID: <878tzwm4i8.fsf@gnus.org> References: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1461969162 22127 80.91.229.3 (29 Apr 2016 22:32:42 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 29 Apr 2016 22:32:42 +0000 (UTC) Cc: 18088@debbugs.gnu.org To: Drew Adams Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Apr 30 00:32:30 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1awGxa-0005SF-FA for geb-bug-gnu-emacs@m.gmane.org; Sat, 30 Apr 2016 00:32:30 +0200 Original-Received: from localhost ([::1]:56624 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1awGxW-0004Bn-PU for geb-bug-gnu-emacs@m.gmane.org; Fri, 29 Apr 2016 18:32:26 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:52438) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1awGxN-0003xC-Gu for bug-gnu-emacs@gnu.org; Fri, 29 Apr 2016 18:32:23 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1awGxB-0003k5-Ka for bug-gnu-emacs@gnu.org; Fri, 29 Apr 2016 18:32:12 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:43770) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1awGxB-0003hn-HT for bug-gnu-emacs@gnu.org; Fri, 29 Apr 2016 18:32:05 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1awGx8-0008Jm-5o for bug-gnu-emacs@gnu.org; Fri, 29 Apr 2016 18:32:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Lars Ingebrigtsen Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 29 Apr 2016 22:32:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 18088 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 18088-submit@debbugs.gnu.org id=B18088.146196907729867 (code B ref 18088); Fri, 29 Apr 2016 22:32:02 +0000 Original-Received: (at 18088) by debbugs.gnu.org; 29 Apr 2016 22:31:17 +0000 Original-Received: from localhost ([127.0.0.1]:56104 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1awGwO-0007lK-SM for submit@debbugs.gnu.org; Fri, 29 Apr 2016 18:31:17 -0400 Original-Received: from hermes.netfonds.no ([80.91.224.195]:51556) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1awGwN-0007jY-Dt for 18088@debbugs.gnu.org; Fri, 29 Apr 2016 18:31:15 -0400 Original-Received: from cm-84.215.1.64.getinternet.no ([84.215.1.64] helo=mouse) by hermes.netfonds.no with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84_2) (envelope-from ) id 1awGwK-0003lh-V8; Sat, 30 Apr 2016 00:31:14 +0200 In-Reply-To: (Drew Adams's message of "Wed, 23 Jul 2014 09:04:55 -0700 (PDT)") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:117283 Archived-At: Drew Adams writes: > Variable `region-extract-function' was apparently added in Emacs 24.4. > It is used in several key places that affect killing or deleting text. > > 1. It should be called out in NEWS, saying what user-visible behavior > its presence changes. > > 2. The doc string points out that, depending on the value of its > argument, its return value is (a) significant and specified or (b) > insignificant and undefined. > > This is the first time I have seen this for an Emacs function > distributed with GNU Emacs. Certainly it is the first time I've > seen such odd behavior documented. > > This does NOT seem like the kind of thing we should be doing - let > alone *encouraging* by defining a variable whose value will be > user-defined functions that have such twisted behavior. > > Is this unusual design necessary? Seems to be sloppy, error prone, > and an invitation to bad programming habits by users. It seems like a quite complicated thing, but as it has been in a release now, I think it's too late to do anything about that. -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no