Suspense-kompatibler Streaming Async Iterable Reader

function wrapAsyncIterable(asyncIterable) {
  const iterator = asyncIterable[Symbol.asyncIterator]();
  let status = 'pending';
  let result;
  let suspender = iterator.next().then(
    res => { status = 'fulfilled'; result = res; },
    err => { status = 'rejected'; result = err; }
  );
  return {
    readNext() {
      if (status === 'pending') throw suspender;
      if (status === 'rejected') throw result;
      if (result.done) return { done: true };
      const current = result.value;
      status = 'pending';
      suspender = iterator.next().then(
        res => { status = 'fulfilled'; result = res; },
        err => { status = 'rejected'; result = err; }
      );
      return { done: false, value: current };
    }
  };
}