final public GrammarSection.Combine AssignOp() throws ParseException {
    switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
    case 2:
      jj_consume_token(2);
        {if (true) return null;}
      break;
    case 4:
      jj_consume_token(4);
           {if (true) return GrammarSection.COMBINE_CHOICE;}
      break;
    case 3:
      jj_consume_token(3);
           {if (true) return GrammarSection.COMBINE_INTERLEAVE;}
      break;
    default:
      jj_la1[40] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }
    throw new Error("Missing return statement in function");
  }