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Re: case-insensitive string comparison

From: Eli Zaretskii
Subject: Re: case-insensitive string comparison
Date: Tue, 26 Jul 2022 15:21:01 +0300

> From: Helmut Eller <eller.helmut@gmail.com>
> 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).

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