# File lib/ipaddr.rb, line 159
  def include?(other)
    other = coerce_other(other)
    if ipv4_mapped?
      if (@mask_addr >> 32) != 0xffffffffffffffffffffffff
        return false
      end
      mask_addr = (@mask_addr & IN4MASK)
      addr = (@addr & IN4MASK)
      family = Socket::AF_INET
    else
      mask_addr = @mask_addr
      addr = @addr
      family = @family
    end
    if other.ipv4_mapped?
      other_addr = (other.to_i & IN4MASK)
      other_family = Socket::AF_INET
    else
      other_addr = other.to_i
      other_family = other.family
    end

    if family != other_family
      return false
    end
    return ((addr & mask_addr) == (other_addr & mask_addr))
  end