Function updateMemoComponent

docs/index.js:8961–9012

(
  current,
  workInProgress,
  Component,
  nextProps,
  renderLanes
)

  return workInProgress.child;
}
function updateMemoComponent(
  current,
  workInProgress,
  Component,
  nextProps,
  renderLanes
) {
  if (null === current) {
    var type = Component.type;
    if (
      "function" === typeof type &&
      !shouldConstruct(type) &&
      void 0 === type.defaultProps &&
      null === Component.compare
    )
      return (
        (workInProgress.tag = 15),
        (workInProgress.type = type),
        updateSimpleMemoComponent(
          current,
          workInProgress,
          type,
          nextProps,
          renderLanes
        )
      );
    current = createFiberFromTypeAndProps(
      Component.type,
      null,
      nextProps,
      workInProgress,
      workInProgress.mode,
      renderLanes
    );
    current.ref = workInProgress.ref;
    current.return = workInProgress;
    return (workInProgress.child = current);
  }
  type = current.child;
  if (!checkScheduledUpdateOrContext(current, renderLanes)) {
    var prevProps = type.memoizedProps;
    Component = Component.compare;
    Component = null !== Component ? Component : shallowEqual;
    if (Component(prevProps, nextProps) && current.ref === workInProgress.ref)
      return bailoutOnAlreadyFinishedWork(current, workInProgress, renderLanes);
  }
  workInProgress.flags |= 1;
  current = createWorkInProgress(type, nextProps);
  current.ref = workInProgress.ref;
  current.return = workInProgress;
  return (workInProgress.child = current);
}
function updateSimpleMemoComponent(
  current,
  workInProgress,