Subject: Re: bug#16731: 24.3.50; Latin small letter sharp s is not considered lower-case

From: Andreas Röhler <[email-masked]>
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 <[email-masked]>
>> CC: [email-masked]
>>
>> Am 12.02.2014 21:16, schrieb Eli Zaretskii:
>>>> Date: Wed, 12 Feb 2014 21:10:57 +0100
>>>> From: Andreas Röhler <[email-masked]>
>>>> CC: [email-masked]
>>>>
>>>> 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"?