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Message: [QUOTE="Charles Oliver Nutter, post: 4633022"] Not impossible...there's just been practically *zero* demand, limited resources, and other things that needed more attention. I'm not opposed to supporting PT in JRuby, but it's never been a very high priority. And now that ruby_parser can be used for almost all the offline PT-based tools, there's even less motivation. I've also had an issue with PT basically just *being* MRI's AST. We've made numerous changes to the structure of the AST, some of them for very good reasons. We've also unified a number of constructs that MRI still keeps separate. In short, we've evolved, and while PT did a good job exposing the general structure of MRI's AST, it also exposes MRI's implementation warts. We don't feel a strong need to emulate those warts. But it's doable :) The fact that it hasn't been done says more about the demand for it than the challenge of making it happen. ruby_parser handles some of this, but it's another all-at-once parser; you can't stop and start it or handle subsections of code easily. Really, it's just a port of MRI's Yacc/Bison parser to Racc. - Charlie [/QUOTE]