Ripper parses Ruby source and tokenizes or builds an AST.

This gem is meant for Ruby 1.8.x builds. Ruby 1.9.x comes with a functioning
ripper implementation out of the box. This gem is a port of the Ripper 1.9
for Ruby 1.8.x. Ripper was written by Minero Aoki and ported by Loren Segal.

WWW: http://github.com/lsegal/ripper18