Function updateReducerImpl

docs/index.js:7398–7502

(hook, current, reducer)

  return updateReducerImpl(hook, currentHook, reducer);
}
function updateReducerImpl(hook, current, reducer) {
  var queue = hook.queue;
  if (null === queue) throw Error(formatProdErrorMessage(311));
  queue.lastRenderedReducer = reducer;
  var baseQueue = hook.baseQueue,
    pendingQueue = queue.pending;
  if (null !== pendingQueue) {
    if (null !== baseQueue) {
      var baseFirst = baseQueue.next;
      baseQueue.next = pendingQueue.next;
      pendingQueue.next = baseFirst;
    }
    current.baseQueue = baseQueue = pendingQueue;
    queue.pending = null;
  }
  pendingQueue = hook.baseState;
  if (null === baseQueue) hook.memoizedState = pendingQueue;
  else {
    current = baseQueue.next;
    var newBaseQueueFirst = (baseFirst = null),
      newBaseQueueLast = null,
      update = current,
      didReadFromEntangledAsyncAction$54 = !1;
    do {
      var updateLane = update.lane & -536870913;
      if (
        updateLane !== update.lane
          ? (workInProgressRootRenderLanes & updateLane) === updateLane
          : (renderLanes & updateLane) === updateLane
      ) {
        var revertLane = update.revertLane;
        if (0 === revertLane)
          null !== newBaseQueueLast &&
            (newBaseQueueLast = newBaseQueueLast.next =
              {
                lane: 0,
                revertLane: 0,
                action: update.action,
                hasEagerState: update.hasEagerState,
                eagerState: update.eagerState,
                next: null
              }),
            updateLane === currentEntangledLane &&
              (didReadFromEntangledAsyncAction$54 = !0);
        else if ((renderLanes & revertLane) === revertLane) {
          update = update.next;
          revertLane === currentEntangledLane &&
            (didReadFromEntangledAsyncAction$54 = !0);
          continue;
        } else
          (updateLane = {
            lane: 0,
            revertLane: update.revertLane,
            action: update.action,
            hasEagerState: update.hasEagerState,
            eagerState: update.eagerState,
            next: null
          }),