From: casiano.rodriguez.leon@gmail.com   
      
   Hello,   
      
   >BTW, besides your tool, there are other modules for parser construction   
   >in Perl: Parse::Yapp (written by Francois Desarmien) and   
   >Parse::RecDescent (written by Damian Conway).   
      
   I have written Parse::Eyapp (available at   
   http://search.cpan.org/perldoc?Parse::Eyapp).   
   Parse::Eyapp extends yacc/Parse::Yapp syntax with functionalities like   
      
   - Named attributes,   
   - EBNF-like expressions   
   - Modifiable default action   
   - Automatic Abstract Syntax Tree building   
   - Automatic Directed Acyclic Graph building   
   - Translation schemes   
   - A language for tree transformations   
   - Tools for scope analysis support,   
      
   and a few more. I have used in a Compiler Construction Course for several   
   years.   
   Consider it if you intend to do parsing or compiler construction in Perl.   
      
      
   Regards   
      
   Casiano   
      
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