GNU bug report logs - #16731
24.3.50; Latin small letter sharp s is not considered lower-case

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Package: emacs;

Reported by: Jorgen Schaefer <forcer <at> forcix.cx>

Date: Wed, 12 Feb 2014 17:31:02 UTC

Severity: normal

Merged with 10576

Found in version 24.3.50

Fixed in version 28.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Andreas Röhler <andreas.roehler <at> easy-emacs.de>
Cc: 16731 <at> debbugs.gnu.org
Subject: bug#16731: 24.3.50; Latin small letter sharp s is not considered lower-case
Date: Wed, 12 Feb 2014 22:16:40 +0200

> Date: Wed, 12 Feb 2014 21:10:57 +0100
> From: Andreas Röhler <andreas.roehler <at> easy-emacs.de>
> CC: 16731 <at> debbugs.gnu.org
> 
> While upcase1 can't succeed, downcase should - if "ß" is a member of downcase_table.

But which character do you want to downcase in this case?

This whole logic works only for _pairs_ of characters (and the
char-table used here is populated by calls to set-case-syntax-pair).
Such machinery cannot possibly work when there's no pair.

The only way I can see out of this conundrum is to consult the
Lowercase Unicode property of the character as fallback, assuming that
won't slow down regex search too much.
This bug report was last modified 3 years and 311 days ago.

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