Teodor Sigaev <teodor@sigaev.ru> writes:
> As I can see, that is because of using isalpha (and other is*), tolower &
> toupper instead of isw* and tow* functions. Is any reason to use them? If not, I
> can modify regc_locale.c similarly to tsearch2 locale part.
The regex code is working with pg_wchar strings, which aren't
necessarily the same representation that the OS' wide-char functions
expect. If we could guarantee compatibility then the above plan
would make sense ...
regards, tom lane