hidden_proxy.rb

require 'delegate'
class HiddenDelegator < SimpleDelegator

  def initialize(obj)
    super
  end

  def class
    __getobj__.class
  end

  def inspect
    __getobj__.inspect
  end

  def method_missing(m, *a, &b)
    case m.to_s
    when /^(.+)!$/
      m = __getobj__.respond_to?(m) ? m : $1
      obj = __getobj__.send(m, *a, &b)
      return nil if obj.nil?
      __setobj__(obj)
      return self
    else
      obj = super
      obj.is_a?(HiddenDelegator) ? obj : HiddenDelegator.new(obj)
    end
  end

  def to_s(*args)
    HiddenDelegator.new(__getobj__.to_s(*args))
  end

  def is_a?(klass)
    super || __getobj__.is_a?(klass)
  end

  def coerce(other)
    [self, other]
  end
end

class Module
  alias _hidden_delegator_case ===
  def ===(other)
    _hidden_delegator_case(other) || other.is_a?(self)
  end
end