# File lib/rdoc/parser/ruby.rb, line 307
  def get_constant
    res = ""
    skip_tkspace false
    tk = get_tk

    while TkCOLON2 === tk or TkCOLON3 === tk or TkCONSTANT === tk do
      res += tk.name
      tk = get_tk
    end

#      if res.empty?
#        warn("Unexpected token #{tk} in constant")
#      end
    unget_tk(tk)
    res
  end