From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Unicode confusables and reordering characters considered harmful Date: Wed, 03 Nov 2021 15:35:10 +0200 Message-ID: <83a6ilicq9.fsf@gnu.org> References: <875ytag0hb.fsf@yahoo.com> <87zgqmd5np.fsf@mat.ucm.es> <83wnlqk3rn.fsf@gnu.org> <72dd5c2a-42c7-b12e-05ed-e93adbd89727@gmail.com> <83ilxajyhw.fsf@gnu.org> <83fssejxf8.fsf@gnu.org> <835ytajsv2.fsf@gnu.org> <11d5fecb44af1d388b7f@heytings.org> <87k0hqrocy.fsf@db48x.net> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="13628"; mail-complaints-to="usenet@ciao.gmane.io" Cc: gregory@heytings.org, stefan@marxist.se, monnier@iro.umontreal.ca, cpitclaudel@gmail.com, emacs-devel@gnu.org To: Daniel Brooks Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Wed Nov 03 14:38:31 2021 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1miGTG-0003M0-8i for ged-emacs-devel@m.gmane-mx.org; Wed, 03 Nov 2021 14:38:30 +0100 Original-Received: from localhost ([::1]:36186 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1miGTF-0004ZA-4o for ged-emacs-devel@m.gmane-mx.org; Wed, 03 Nov 2021 09:38:29 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:36996) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1miGQ4-0007q6-RV for emacs-devel@gnu.org; Wed, 03 Nov 2021 09:35:12 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:51220) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1miGQ4-0005TS-Ho; Wed, 03 Nov 2021 09:35:12 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=xn4Bo5oLhyHZVnmiPSLbXjHJksGK8rSXYyAoJkpU9+0=; b=oQC9/j/a3jQk aqeQzL03KkgWJ5ww41X+o2pBNLUs2oEQSEjXirC9XQjMUOxHrhU5D/ViGFvH1UDXkTNr6l2TgdITk vh6NA8Y0l/CQgDegpGHtUFWOw3tYJVNI4frywhexwESoeey16ANpaImPbJb14rae7mHZFqkV7wolm sDAFtYuKkuKcRTMEL5/aoflHfvrHjbzTXxtCPKfhaZeTCEW5yateki+3buF6rnR8lRKTDndSAtxbG FGgjyzfu1+399fHuOrZdEMHr3ge4ct5uwn40cCTC73rGLfZomPYltA3azrWtwECjc9a7ZkIeWXtP9 uftT6NAejkMwxsgXotracg==; Original-Received: from [87.69.77.57] (port=4793 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1miGQ4-0000Cl-2J; Wed, 03 Nov 2021 09:35:12 -0400 In-Reply-To: <87k0hqrocy.fsf@db48x.net> (message from Daniel Brooks on Tue, 02 Nov 2021 18:59:09 -0700) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:278577 Archived-At: > From: Daniel Brooks > Cc: Gregory Heytings , Eli Zaretskii , > Stefan Kangas , cpitclaudel@gmail.com, > emacs-devel@gnu.org > Date: Tue, 02 Nov 2021 18:59:09 -0700 > > One recommendation the paper made was that languages should allow them, > but give a syntax error if they reorder the comment or string delimiters > relative to other text. This would mean the compilers/interpreters will need to implement the Unicode Bidirectional Algorithm, which is IMO and unreasonable requirement, since those tools don't care about display.