> Any ideas on this? It's using Ruby2Ruby and ParseTree. Is it because it's
> based around C extensions? Anyone know how to do it on the CLR?

http://parsetree.rubyforge.org/

ParseTree hooks into MRI's internals and exposes the parse tree for a given 
chunk of Ruby code. For this to work on IronRuby you'd have to rewrite the 
C-extension-portion of this library to look at the DLR trees (may require 
changes to ironruby as well to expose the tree, but I'm not sure).

Ruby2Ruby is just a Ruby parser written in Ruby, but depends on racc, which 
uses a C extension, though it seems like you can run racc without it.

~Jimmy
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