Andrew Gierth <andrew@tao11.riddles.org.uk> writes:
> Obviously, this happens because the locale support functions in
> backend/regex/regc_locale.c are (presumably intentionally) crippled so
> as not to support non-ascii chars, despite all the code there using
> wide chars for everything otherwise.
It's not so much intentional as that no one has gotten around to making
it work. The difficulty is that the wide-char codes we are using might
not match what the <wctype.h> functions expect, and it's unclear what
we could do to fix that.
regards, tom lane