split

# File lib/uri/rfc3986_parser.rb, line 14
    def split(uri) #:nodoc:
      begin
        uri = uri.to_str
      rescue NoMethodError
        raise InvalidURIError, "bad URI(is not URI?): #{uri.inspect}"
      end
      uri.ascii_only? or
        raise InvalidURIError, "URI must be ascii only #{uri.dump}"
      if m = RFC3986_URI.match(uri)
        query = m["query".freeze]
        scheme = m["scheme".freeze]
        opaque = m["path-rootless".freeze]
        if opaque
          opaque << "?#{query}" if query
          [ scheme,
            nil, # userinfo
            nil, # host
            nil, # port
            nil, # registry
            nil, # path
            opaque,
            nil, # query
            m["fragment".freeze]
          ]
        else # normal
          [ scheme,
            m["userinfo".freeze],
            m["host".freeze],
            m["port".freeze],
            nil, # registry
            (m["path-abempty".freeze] ||
             m["path-absolute".freeze] ||
             m["path-empty".freeze]),
            nil, # opaque
            query,
            m["fragment".freeze]
          ]
        end
      elsif m = RFC3986_relative_ref.match(uri)
        [ nil, # scheme
          m["userinfo".freeze],
          m["host".freeze],
          m["port".freeze],
          nil, # registry,
          (m["path-abempty".freeze] ||
           m["path-absolute".freeze] ||
           m["path-noscheme".freeze] ||
           m["path-empty".freeze]),
          nil, # opaque
          m["query".freeze],
          m["fragment".freeze]
        ]
      else
        raise InvalidURIError, "bad URI(is not URI?): #{uri.inspect}"
      end
    end