#
#  Range
#
class Range
  # 15.2.14.4.4
  def each(&block)
    val = self.first
    unless val.respond_to? :succ
      raise TypeError, "can't iterate"
    end

    last = self.last
    return self if (val <=> last) > 0

    while((val <=> last) < 0)
      block.call(val)
      val = val.succ
    end

    block.call(val) unless exclude_end?

    self
  end
end

# include modules
module Enumerable; end
class Range
  include Enumerable
end