http://quix.github.com/live_ast
Since its initial announcement, live_ast has acquired the ability to
(practically) fully emulate ParseTree for Ruby 1.9. The awkward
ast_eval stand-in for eval is no longer necessary.
The following now works on MRI and JRuby (and will work on Rubinius
when it implements more 1.9.2 features).
% gem install live_ast
% gem install boc
require ‘live_ast/full’
f = eval “lambda { ‘foo’ }”
p f.to_ast
=> s(:iter, s(:call, nil, :lambda, s(:arglist)), nil, s(:str,
“foo”))
IRB support has also been added.
live_ast continues to be a small project written in pure Ruby. The boc
extension gem is a recently-discovered loophole which enables eval to
be replaced. This must be done explicitly, however, and the default
continues to use just pure Ruby (ast_eval).