ср, 12 мая 2021 г. в 12:58, Antony Polukhin <antoshkka@gmail.com>:
<...>
> Should we care about those users?

Looks like the answer is "yes". There are tests for that in
22_locale/ctype/requirements/explicit_instantiation.cc and
22_locale/money_get/cons/3.cc

Attaching a patch with review fixes (with ctype specialization for basic_string)

-- 
Best regards,
Antony Polukhin