get_tk

# File lib/rdoc/parser/ruby.rb, line 1671
  def get_tk
    tk = nil
    if @tokens.empty?
      tk = @scanner.token
      @read.push @scanner.get_read
      puts "get_tk1 => #{tk.inspect}" if $TOKEN_DEBUG
    else
      @read.push @unget_read.shift
      tk = @tokens.shift
      puts "get_tk2 => #{tk.inspect}" if $TOKEN_DEBUG
    end

    if TkSYMBEG === tk then
      set_token_position(tk.line_no, tk.char_no)
      tk1 = get_tk
      if TkId === tk1 or TkOp === tk1 or TkSTRING === tk1 then
        if tk1.respond_to?(:name)
          tk = Token(TkSYMBOL).set_text(":" + tk1.name)
        else
          tk = Token(TkSYMBOL).set_text(":" + tk1.text)
        end
        # remove the identifier we just read (we're about to
        # replace it with a symbol)
        @token_listeners.each do |obj|
          obj.pop_token
        end if @token_listeners
      else
        warn("':' not followed by identifier or operator")
        tk = tk1
      end
    end

    # inform any listeners of our shiny new token
    @token_listeners.each do |obj|
      obj.add_token(tk)
    end if @token_listeners

    tk
  end