s_expression -rc -w =                                                          (say
{                                                                                  (+ 2
  token =                                                                             (* 2
  {                                                                                      2
    pchar string;                                                                     )
    pfixed64 number;                                                               )
    p_s_expression expression;                                                 )
  };

  pchar id;
  int length;
  token tokens[];
};
