public void    test_parser(String s)
  {
    System.out.print("The string \"" + s + "\" ");

    if (T_token_p(s))
      System.out.println("is T.");
    else if (NIL_token_p(s))
      System.out.println("is NIL.");
    else if (INTEGER_token_p(s))
      System.out.println("is an integer.");
    else if (REAL_token_p(s))
      System.out.println("is a double.");
    else if (STRING_token_p(s))
      System.out.println("is a string.");
    else if (SYMBOL_token_p(s))
      System.out.println("is a symbol.");
    else
      System.out.println("is not recognized.");
  }