Internal Program Version: Parse::Yapp  1.21.5.42.0

Parse::Yapp (Yet Another Perl Parser compiler) is a collection of modules
that let you generate and use yacc like thread safe (reentrant) parsers
with perl object oriented interface.

The script yapp is a front-end to the Parse::Yapp module and let you easily
create a Perl OO parser from an input grammar file.

http://search.cpan.org/dist/Parse-Yapp