parseAsync method

Implementation

@override
AsyncResult<O2> parseAsync(State<ChunkedData<I>> state) {
  final result = AsyncResult<O2>();
  late AsyncResult<O1> r1;
  var action = 0;
  // TODO:
  void parse() {
    while (true) {
      switch (action) {
        case 0:
          r1 = p.parseAsync(state);
          action = 1;
          if (r1.ok == null) {
            r1.handler = parse;
            return;
          }

          break;
        case 1:
          if ((result.ok = r1.ok) == true) {
            final v1 = r1.value!.value;
            final v2 = f(v1);
            result.value = Result(v2);
          }

          state.input.handler = result.handler;
          action = -1;
          return;
        default:
          throw StateError('Invalid state: $action');
      }
    }
  }

  parse();
  return result;
}