Function updateReducer

docs/index.js:7394–7397

(reducer)

  return "function" === typeof action ? action(state) : action;
}
function updateReducer(reducer) {
  var hook = updateWorkInProgressHook();
  return updateReducerImpl(hook, currentHook, reducer);
}
function updateReducerImpl(hook, current, reducer) {
  var queue = hook.queue;
  if (null === queue) throw Error(formatProdErrorMessage(311));