class Range

  unless defined?(Rails)
    def include_with_range?(value)
      if value.is_a?(::Range)
        operator = exclude_end? && !value.exclude_end? ? :< : :<=
        include?(value.first) && value.last.send(operator, last)
      else
        include?(value)
      end
    end
  end

  unless defined?(Rails)
    def overlaps?(other)
      cover?(other.first) || other.cover?(first)
    end
  end

end