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: Questions about isearch Date: Mon, 30 Nov 2015 17:53:36 +0200 Message-ID: <83poyrmqkf.fsf@gnu.org> References: <83lh9lx6oi.fsf@gnu.org> <83a8q1x1cn.fsf@gnu.org> <87h9k74pkw.fsf@gmail.com> <83bnafse4f.fsf@gnu.org> <878u5jrvih.fsf@rub.de> <87mvtyqzyx.fsf@mbork.pl> <831tbaqwwv.fsf@gnu.org> <565AC7BA.7070400@online.de> <83poysolaf.fsf@gnu.org> <565C1961.9010501@online.de> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE X-Trace: ger.gmane.org 1448898852 2044 80.91.229.3 (30 Nov 2015 15:54:12 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 30 Nov 2015 15:54:12 +0000 (UTC) Cc: bruce.connor.am@gmail.com, emacs-devel@gnu.org To: Andreas =?utf-8?Q?R=C3=B6hler?= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Nov 30 16:54:03 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 1a3Qm8-0003qs-KH for ged-emacs-devel@m.gmane.org; Mon, 30 Nov 2015 16:54:00 +0100 Original-Received: from localhost ([::1]:41681 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a3Qm8-0002zf-1H for ged-emacs-devel@m.gmane.org; Mon, 30 Nov 2015 10:54:00 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:47968) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a3Qlu-0002yf-J9 for emacs-devel@gnu.org; Mon, 30 Nov 2015 10:53:47 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1a3Qlq-0004OK-HN for emacs-devel@gnu.org; Mon, 30 Nov 2015 10:53:46 -0500 Original-Received: from mtaout26.012.net.il ([80.179.55.182]:54178) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a3Qlq-0004Nt-9E for emacs-devel@gnu.org; Mon, 30 Nov 2015 10:53:42 -0500 Original-Received: from conversion-daemon.mtaout26.012.net.il by mtaout26.012.net.il (HyperSendmail v2007.08) id <0NYM00100XDV5W00@mtaout26.012.net.il> for emacs-devel@gnu.org; Mon, 30 Nov 2015 17:56:26 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([84.94.185.246]) by mtaout26.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NYM00MF6XM10C40@mtaout26.012.net.il>; Mon, 30 Nov 2015 17:56:26 +0200 (IST) In-reply-to: <565C1961.9010501@online.de> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 80.179.55.182 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:195611 Archived-At: > Cc: emacs-devel@gnu.org, bruce.connor.am@gmail.com, mbork@mbork.pl > From: Andreas R=C3=B6hler > Date: Mon, 30 Nov 2015 10:39:45 +0100 >=20 > Emacs's search capabilities are language-agnostic. >=20 > AFAIU notion of case-folding refers to the idea of upper- or lowerc= ase - which makes sense only with a couple of languages. That appears to be incorrect, because UCD, the Unicode Character Database, is not tailored to any language in particular, and yet it does specify letter-case pairs for many characters beyond ASCII. The language-specific variations to this basic data are then provided by further databases, such as CLDR. Emacs currently supports only the language-independent part of case folding, character equivalences, and other related features. Additio= n of new languages does not and cannot affect that. > If case-folding is off by default, there should not be no harm. Case folding was ON by default in Emacs since about forever. It is natural to many, and can be easily turned off by those who don't like it. That is why, IMO, we hear almost no complaints about it.