_why's Ruby MethodFinder addition tweaked and revised.

methodfinder_what.rb

require 'methodfinder'

# _why's MethodFinder addition tweaked and revised.
# <http://redhanded.hobix.com/inspect/stickItInYourIrbrcMethodfinder.html>

class MethodFinder
  def self.with_redirected_streams
    redirect_streams
    yield
  ensure
    restore_streams
  end
  
  module What
    def what?(*args, &block)
      Delegate.new(self, args, &block)
    end
    
    class Delegate < BasicObject
      undef_method :!
      undef_method :!=
      undef_method :==
      undef_method :equal?
      
      def initialize(receiver, args, &block)
        @receiver = receiver
        @args = args
        @block = block
      end
      
      def pretty_inspect
        args = @args.pretty_inspect
        args.sub!(/^\[/, '')
        args.sub!(/\]\n$/, '')
        block = @block ? "{}" : ""
        "#{@receiver.pretty_inspect.chomp}.what?(#{args})#{block}"
      end

      def method_missing(m, *args, &block)
        ::MethodFinder.with_redirected_streams do
          @receiver.find_method do |r|
            r.unknown(*@args, &@block).send(m, *args, &block)
          end
        end
      end
    end
  end
end

include MethodFinder::What

MethodFinder::INSTANCE_METHOD_BLACKLIST[:Object] << :what?