I've been working on a SRFI 14 implementation manipulating the full
Unicode character set, based partially on the data structure described here:

https://mailman.iro.umontreal.ca/pipermail/gambit-list/2023-May/009665.html

I guess I should have asked here first whether there are any existing
implementations manipulating the full Unicode set.  If so, please
enlighten me.

My code passes the minimal tests in Olin's test suite. I'm looking now
for more extensive test suites, ones that may use characters outside the
Latin1 range, and particularly in the upper (> 16 bit) range of the
Unicode character set.

Brad