parseAsync method

Implementation

@override
void parseAsync(State<ChunkedData<I>> state, ResultCallback<O2> onDone) {
  void parse() {
    p.parseAsync(state, (result) {
      if (result == null) {
        onDone(null);
      } else {
        final v = f(result.value);
        onDone(Result(v));
      }
    });
  }

  parse();
}