# File lib/uri/generic.rb, line 156
    def initialize(scheme, 
                   userinfo, host, port, registry, 
                   path, opaque, 
                   query, 
                   fragment,
                   arg_check = false)
      @scheme = nil
      @user = nil
      @password = nil
      @host = nil
      @port = nil
      @path = nil
      @query = nil
      @opaque = nil
      @registry = nil
      @fragment = nil

      if arg_check
        self.scheme = scheme
        self.userinfo = userinfo
        self.host = host
        self.port = port
        self.path = path
        self.query = query
        self.opaque = opaque
        self.registry = registry
        self.fragment = fragment
      else
        self.set_scheme(scheme)
        self.set_userinfo(userinfo)
        self.set_host(host)
        self.set_port(port)
        self.set_path(path)
        self.set_query(query)
        self.set_opaque(opaque)
        self.set_registry(registry)
        self.set_fragment(fragment)
      end
      if @registry && !self.class.use_registry
        raise InvalidURIError, 
          "the scheme #{@scheme} does not accept registry part: #{@registry} (or bad hostname?)"
      end
      
      @scheme.freeze if @scheme
      self.set_path('') if !@path && !@opaque # (see RFC2396 Section 5.2)
      self.set_port(self.default_port) if self.default_port && !@port
    end