how to "borrow" the RDoc::RubyParser and HTMLGenerator

[Phlip]

Rubies:

I feel like syntax-highlighting some Ruby code, just the same way as RDoc
does.

(Put another way, I'm trying to find a way to extend RDoc.)

So if I have some Ruby, such as 'foo(42)', how do I parse than with RDoc::
RubyParser, to create a stream of tokens? And how do I route those tokens
into Generator::HTMLGenerator, and get a string of HTML
containing 'foo(42)' with the correct colors?

The source code is kind'a snarled together, and I can't find the correct
entry points!