A library for tokenizing, lexing, and parsing Ruby regular expressions.

* Multilayered * A scanner/tokenizer based on Ragel * A lexer that produces a "stream" of token objects. * A parser that produces a "tree" of Expression objects (OO API) * Runs on Ruby 1.9, 2.x, and JRuby (1.9 mode) runtimes. * Recognizes Ruby 1.8, 1.9, and 2.x regular expressions