final public void generation_scheme() throws ParseException {
    switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
    case FOR:
      jj_consume_token(FOR);
      identifier();
      jj_consume_token(IN);
      range();
      break;
    case IF:
      jj_consume_token(IF);
      expression();
      break;
    default:
      jj_la1[88] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }
  }