Function useReducer

index.js:353–386

(reducer, value, init, options)

  };

  var useReducer = function useReducer(reducer, value, init, options) {
    var i = state.i++;
    var _state = state,
        hook = _state.hook,
        args = _state.args,
        stack = _state.stack,
        length = _state.length;
    if (i === length) state.length = stack.push({});
    var ref = stack[i];
    ref.args = args;

    if (i === length) {
      var fn = typeof init === 'function';

      var _ref = (fn ? options : init) || options || defaults,
          asy = _ref.async,
          always = _ref.always;

      ref.$ = fn ? init(value) : getValue(void 0, value);
      ref._ = asy ? updates.get(hook) || updates.set(hook, reraf()) : hookdate;

      ref.f = function (value) {
        var $value = reducer(ref.$, value);

        if (always || ref.$ !== $value) {
          ref.$ = $value;

          ref._(hook, null, ref.args);
        }
      };
    }

    return [ref.$, ref.f];
  }; // useState

  var useState = function useState(value, options) {
    return useReducer(getValue, value, void 0, options);