parseAsync method

Implementation

@override
AsyncResult<O> parseAsync(State<ChunkedData<I>> state) {
  final result = AsyncResult<O>();
  late AsyncResult<O> r1;
  final failPos = state.failPos;
  final errorCount = state.errorCount;
  var action = 0;
  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) {
            result.value = r1.value;
          } else {
            if (state.canHandleError(failPos, errorCount)) {
              if (state.pos == state.failPos) {
                state.clearErrors(failPos, errorCount);
                state.fail<Object?>(ErrorExpectedTag(tag));
              }
            }
          }

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

  parse();
  return result;
}