parseAsync method

Implementation

@override
void parseAsync(State<ChunkedData<I>> state, ResultCallback<O> onDone) {
  final input = state.input;
  void parse3() {
    p3.parseAsync(state, (result) {
      onDone(result);
    });
  }

  void parse2() {
    p2.parseAsync(state, (result) {
      if (result == null) {
        input.handle(parse3);
      } else {
        onDone(result);
      }
    });
  }

  void parse() {
    p1.parseAsync(state, (result) {
      if (result == null) {
        input.handle(parse2);
      } else {
        onDone(result);
      }
    });
  }

  parse();
}