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: Buffer-local variables affect general-purpose functions Date: Wed, 26 Mar 2014 22:03:41 +0200 Message-ID: <83wqfgybfm.fsf@gnu.org> References: <831txozsqa.fsf@gnu.org> <53332B35.8050109@cs.ucla.edu> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1395864232 2725 80.91.229.3 (26 Mar 2014 20:03:52 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 26 Mar 2014 20:03:52 +0000 (UTC) Cc: emacs-devel@gnu.org To: Paul Eggert Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Mar 26 21:04:01 2014 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 1WSu3M-0006Hx-JJ for ged-emacs-devel@m.gmane.org; Wed, 26 Mar 2014 21:04:00 +0100 Original-Received: from localhost ([::1]:50008 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WSu3M-0001BC-7R for ged-emacs-devel@m.gmane.org; Wed, 26 Mar 2014 16:04:00 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:53952) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WSu3E-0000ys-GR for emacs-devel@gnu.org; Wed, 26 Mar 2014 16:03:58 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WSu38-0000rT-Nb for emacs-devel@gnu.org; Wed, 26 Mar 2014 16:03:52 -0400 Original-Received: from mtaout21.012.net.il ([80.179.55.169]:63281) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WSu38-0000r1-GD for emacs-devel@gnu.org; Wed, 26 Mar 2014 16:03:46 -0400 Original-Received: from conversion-daemon.a-mtaout21.012.net.il by a-mtaout21.012.net.il (HyperSendmail v2007.08) id <0N3200F007D1VB00@a-mtaout21.012.net.il> for emacs-devel@gnu.org; Wed, 26 Mar 2014 22:03:45 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout21.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0N3200FUT7Q8TT50@a-mtaout21.012.net.il>; Wed, 26 Mar 2014 22:03:45 +0200 (IST) In-reply-to: <53332B35.8050109@cs.ucla.edu> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: Solaris 10 X-Received-From: 80.179.55.169 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:171011 Archived-At: > Date: Wed, 26 Mar 2014 12:32:05 -0700 > From: Paul Eggert > > Eli Zaretskii wrote: > > do we want to do something about that? > > Yes, and we should start by removing the backwards-compatibility hacks > in question. Whether the current buffer is unibyte should not affect > the behavior of general-purpose functions on characters. Well, the change in behavior is not limited to unibyte buffers, as I told in my OP. I think the problem is wider. > Elisp code that blindly extracts bytes from unibyte buffers or strings, > and treats these bytes as characters, is broken anyway. It needs to be > fixed to convert bytes to characters (using 'unibyte-char-to-multibyte', > say) before it gives them to general-purpose character functions like > 'downcase' and 'char-equal'. But there should still be a way to compare bytes and strings of bytes in a unibyte buffer, right? So perhaps we should have special functions just for that purpose, and char-equal should signal an error when presented with unibyte non-ASCII values.