ruby-parser.rb

require 'parser/runner'

module Parser

  class Runner::RubyParse < Parser::Runner

    class PrawnProcessor < Parser::AST::Processor
      def on_send(node)
        p node.to_s

        node.children.each do |child_node|
          p child_node.class
          p child_node.type
        end
      end

      def on_if(node)
        p "Nice, an if node\n"
      end
    end

    private

    def runner_name
      'ruby-parse'
    end

    def process(buffer)
      ast = @parser.parse(buffer)

      PrawnProcessor.new.process(ast)
    end
  end

end