I'm looking for a ruby language parser written in ruby, that I can hack
to play about with generating other ruby-like languages.

I've found RubyParser. Are there any other options I should be looking
at?

* I see ruby 1.9 has ripper, but it's written as a C extension. I want
something in pure ruby.

* ParseTree is also in C I believe.

* Possibly could look at the internals of rubinius?

* Anything else?

Thanks,

Brian.
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