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: case-insensitive string comparison Date: Tue, 26 Jul 2022 15:21:01 +0300 Message-ID: <83tu74cbf6.fsf@gnu.org> References: <87ilnsq4cr.fsf@gnu.org> 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="27702"; mail-complaints-to="usenet@ciao.gmane.io" Cc: rms@gnu.org, sds@gnu.org, emacs-devel@gnu.org To: Helmut Eller Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Jul 26 14:24:46 2022 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 1oGJcC-0006xk-3V for ged-emacs-devel@m.gmane-mx.org; Tue, 26 Jul 2022 14:24:44 +0200 Original-Received: from localhost ([::1]:57696 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oGJcA-0004v5-Vk for ged-emacs-devel@m.gmane-mx.org; Tue, 26 Jul 2022 08:24:43 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:33462) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oGJYa-0002b2-OY for emacs-devel@gnu.org; Tue, 26 Jul 2022 08:21:00 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:37684) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oGJYa-0007iW-5x; Tue, 26 Jul 2022 08:21:00 -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=ufYK3eChFSuag+Frxqu2aCvdunY76M7tsibCeuSjTOU=; b=C01rZKl440Pj1bhJWWSD xev1l5JnJm0FJagM0QtJdtJhsnhCw2zaDB2iFqhc4l80r5sxjwizJKRRvmLq/snpSDwkeXOmhLRCP qL2X9nZoOl4MteIFpHxv0rJ3HoQqj1sCEH7RPqVFLqEUgLCu1LbI8NbA0gFw0OFQ3nbz3QZ5WJV6c LoslCsongVoVPW/2D2lT9n76uIlR7o1v9+6cdT+V5sGYCK59oMGDvxX5j0OY5abF2FTq9rZjEYI7x tLp4Iv1i+qXAbV3gHOJaReZlR2cNKeLRKZo+VLlXMLOQ1k8XAozXh8Ef83TkjSfd/l/TvihewmfMa 4uXK94G3QRj1yA==; Original-Received: from [87.69.77.57] (port=1124 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 1oGJYW-0006k0-MT; Tue, 26 Jul 2022 08:20:57 -0400 In-Reply-To: (message from Helmut Eller on Tue, 26 Jul 2022 10:00:43 +0200) 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:292680 Archived-At: > From: Helmut Eller > Cc: sds@gnu.org, emacs-devel@gnu.org > Date: Tue, 26 Jul 2022 10:00:43 +0200 > > On Mon, Jul 25 2022, Richard Stallman wrote: > > > How to integrate something like that into Emacs, and in > > general how to handle `ß' properly in case conversion, calls for more > > thought. > > Unicode defines a LATIN CAPITAL LETTER SHARP S `ẞ' U+1E9E. So maybe > that's an easy problem now. Not sure what typographers think about it. They are in disagreement, AFAIU. The Unicode Character Database (UCD) doesn't define ß and ẞ as a case-pair: the latter down-cases to the former, but the former doesn't up-case to the latter. So it is still a "special-casing" situation (and AFAIU different languages have different views on its usage).