[Spirit-general] [Spirit.Qi] How do I use UTF-8 encoding with Qi

I came across old thread
http://sourceforge.net/mailarchive/forum.php?forum_name=spirit-general&max_rows=25&offset=7&style=nested&viewmonth=200811&viewday=25,
between OvermindDL1 and Joel and Hartmut about the support of unicode/UTF8.
It was like 1-2 year ago, in 2008 ?

I don't see much example in the pdf documentation about using UTF8 encoding
for Qi and apologize if there is already a thread on this.

I believe by default Qi does not enable UTF8 support and one would encounter
the below assertion.

Assertion failed: isascii_(ch), file
c:\src\is2\public\ext\boost_1_41\boost\spirit\home\support\char_encoding\ascii.hpp,
line
256

I see that there is utf8.hpp file in support/char_encoding. I am hoping that
the support for utf8 is already in Spirit .Qi.

Thanks

Henry