$ ruby LPCTreeRewrites.rb --lexer-name "LPC::Lexer" --parser-name "LPC::Parser" --parser-rule "translation_unit" < foobar.cpp

/usr/home/pope/.rvm/gems/ruby-1.8.7-p248/gems/antlr3-1.8.8/lib/antlr3/main.rb:576:in `send': nil is not a symbol (TypeError)
        from /usr/home/pope/.rvm/gems/ruby-1.8.7-p248/gems/antlr3-1.8.8/lib/antlr3/main.rb:576:in `recognize'
        from /usr/home/pope/.rvm/gems/ruby-1.8.7-p248/gems/antlr3-1.8.8/lib/antlr3/main.rb:162:in `execute'
        from /usr/home/pope/.rvm/gems/ruby-1.8.7-p248/gems/antlr3-1.8.8/lib/antlr3/tree.rb:108:in `main'
        from LPCTreeRewrites.rb:297
        from LPCTreeRewrites.rb:297