Query on UTF-32 encodings for letters

[Neil Booth]

Robert Dewar wrote:-

> Ada 2005 requires full support for all planes of UTF-32
> encoding, including the use of letters in identifiers,
> including also proper upper lower case equivalence.
> 
> All this information is obtainable from the 10646 standard,
> but it is non-trivial to generate the predicates Is_Letter,
> and the function To_Lower.
> 
> I wondered if anyone knew of GPL'ed code that did either of
> these two functions before I reinvent the wheel :-)

You should have a look at Tom Lord's hackerlab; it's GPLed
and part of the GNU project I think.  At a glance it seems to
have a very clean unicode implementation.

Neil.