class WEBrick::HTTPVersion

def initialize(version)
  case version
  when HTTPVersion
    @major, @minor = version.major, version.minor
  when String
    if /^(\d+)\.(\d+)$/ =~ version
      @major, @minor = $1.to_i, $2.to_i
    end
  end
  if @major.nil? || @minor.nil?
    raise ArgumentError,
      format("cannot convert %s into %s", version.class, self.class)
  end
end