looking for Lex/Bison unicode support

Does anybody knows a flex/bison compatible parsing tools that support
unicode and generate c++ code ? I found a tool called zlex that
supports unicode but produces c code.


thanks,
Yaron
[Yacc and its clones parse tokens, not characters, so they shouldn't
be a problem, give or take nits like passing through non-ASCII strings
in C action routines correctly. Lex or flex is harder since all of
the implementations I know of use the character codes as indexes into
tables to implement the lex state machine. But if you do that for
Unicode, you'll have 64K entry tables rather than 256 entry tables and
severe program bloat. I believe that plan 9 has a Unicode lex,
presumably with some hackery to keep the table sizes down. -John]

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