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

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Message #34 received at 16731 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Röhler <andreas.roehler <at> easy-emacs.de>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Juanma Barranquero <lekktu <at> gmail.com>, 16731 <at> debbugs.gnu.org
Subject: Re: bug#16731: 24.3.50; Latin small letter sharp s is not considered
 lower-case
Date: Thu, 13 Feb 2014 09:27:43 +0100

Am 13.02.2014 04:46, schrieb Eli Zaretskii:
>> Date: Wed, 12 Feb 2014 21:33:31 +0100
>> From: Andreas Röhler <andreas.roehler <at> easy-emacs.de>
>> CC: 16731 <at> debbugs.gnu.org
>>
>> Am 12.02.2014 21:16, schrieb Eli Zaretskii:
>>>> 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).
>>
>> So populate it differently, resp. allow empty slots.
>
> How will we then be able to distinguish between lower-case characters
> that have no upcase variant and characters that are not lower-case
> characters at all?
>
>> You can do (downcase "d") for example, which results in "d".
>>
>> Instead of
>>
>> upcase1 (c) != c
>>
>> what about
>>
>> downcase (c) == c
>>
>> ?
>
> The same is true for any non-letter, like punctuation.
>
>

Okay, right.

So it seems upcase_table is populated wrongly with "ß"?

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