final public void logical_operator() throws ParseException {
    switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
    case AND:
      jj_consume_token(AND);
      break;
    case OR:
      jj_consume_token(OR);
      break;
    case NAND:
      jj_consume_token(NAND);
      break;
    case NOR:
      jj_consume_token(NOR);
      break;
    case XOR:
      jj_consume_token(XOR);
      break;
    case XNOR:
      jj_consume_token(XNOR);
      break;
    default:
      jj_la1[127] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }
  }