Final remarks

• It's very easy to write very slow parsers.
• Current version is 1.78.
• Available on CPAN.
• Written in 100% Perl.
• Kudos to Damian Conway for creating this package.
• There is a lot more than what you have seen now.

References

• Aho and Ullman: The Theory of Parsing, Translating, and Compiling, Volume I Prentice-Hall: 1972.
• Hopcroft and Ullman: Introduction to Automata Theory, Languages, and Computation Addison Wesley: 1979.
• Aho, Sethi, Ullman: Compilers Principles, Techniques, and Tools Addison Wesley: 1986.