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 21:30:51 +0200 Message-ID: <83cznhghp0.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> <11d5fecb449846dc0851@heytings.org> <875yt932ar.fsf@igel.home> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="21875"; mail-complaints-to="usenet@ciao.gmane.io" Cc: stefan@marxist.se, gregory@heytings.org, schwab@linux-m68k.org, cpitclaudel@gmail.com, emacs-devel@gnu.org To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Wed Nov 03 20:32:08 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 1miLzU-0005SG-1W for ged-emacs-devel@m.gmane-mx.org; Wed, 03 Nov 2021 20:32:08 +0100 Original-Received: from localhost ([::1]:60234 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1miLzS-0001V0-P7 for ged-emacs-devel@m.gmane-mx.org; Wed, 03 Nov 2021 15:32:06 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:47336) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1miLyO-0000co-8X for emacs-devel@gnu.org; Wed, 03 Nov 2021 15:31:00 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:38162) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1miLyJ-0007EG-9C; Wed, 03 Nov 2021 15:30:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=GM17Rie51Cvui+v9WXTksJCBoesHgla8Cuqkg+c6Vp0=; b=AyW3xxRuWoze84uvI84p mV97b2MlsgQrKyd8tb22bsLmIbQ/5cTmCUm9gwdVWhbLakBKD29+vUcFOmHESpc3nxPJp+4OGmRB5 e8BGu+PVI74zJTqPKPG+04NapUkfWo4NTGrD5znqhCwfhoQ86/+4LefrYxgYhg4OxD0q9ZRxGt84y exoF2ty8+0Rwx28uNfQyw4s0g9JVva2UjTaNZnZ7EA4r5O+uUgKoQuS6c55z5fr6WvmBKfe11BO6j wJjyQnolTPT2R7+sEDPblL+KiS/UbZCpyA+yOYkg08m/9qr2qWt17bf5oeaKUSEwG/6Dh18jIzGKa HH6S6HTEYOEmVQ==; Original-Received: from [87.69.77.57] (port=3052 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 1miLyH-00076F-HE; Wed, 03 Nov 2021 15:30:54 -0400 In-Reply-To: (message from Stefan Monnier on Wed, 03 Nov 2021 14:47:26 -0400) 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:278611 Archived-At: > From: Stefan Monnier > Cc: Gregory Heytings , Eli Zaretskii , > Stefan Kangas , cpitclaudel@gmail.com, > emacs-devel@gnu.org > Date: Wed, 03 Nov 2021 14:47:26 -0400 > > >> + (aset buffer-display-table ?‪ [?→]) > >> + (aset buffer-display-table ?‫ [?←]) > >> + (aset buffer-display-table ?‭ [?→]) > >> + (aset buffer-display-table ?‮ [?←]) > >> + (aset buffer-display-table ?⁦ [?→]) > >> + (aset buffer-display-table ?⁧ [?←]) > >> + (aset buffer-display-table ?⁨ [?↓]) > >> + (aset buffer-display-table ?‬ [?↑]) > >> + (aset buffer-display-table ?⁩ [?↑]) > > > > A perfect example of how legitimate use of these characters can mess up > > your source. :-) > > FWIW, I think the source would be clearer if it used `?\u{CHARNAME}` > instead of the literal chars. Huh? What's unclear in a line like this one: (aset buffer-display-table ?‫ [?←])