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Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\nvar MAX_SIGNED_31_BIT_INT = 1073741823;\n\n// Inlined Object.is polyfill.\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is\nfunction objectIs(x, y) {\n  if (x === y) {\n    return x !== 0 || 1 / x === 1 / y;\n  } else {\n    return x !== x && y !== y;\n  }\n}\n\nfunction createEventEmitter(value) {\n  var handlers = [];\n  return {\n    on: function on(handler) {\n      handlers.push(handler);\n    },\n    off: function off(handler) {\n      handlers = handlers.filter(function (h) {\n        return h !== handler;\n      });\n    },\n    get: function get() {\n      return value;\n    },\n    set: function set(newValue, changedBits) {\n      value = newValue;\n      handlers.forEach(function (handler) {\n        return handler(value, changedBits);\n      });\n    }\n  };\n}\n\nfunction onlyChild(children) {\n  return Array.isArray(children) ? children[0] : children;\n}\n\nfunction createReactContext(defaultValue, calculateChangedBits) {\n  var _Provider$childContex, _Consumer$contextType;\n\n  var contextProp = '__create-react-context-' + (0, _gud2.default)() + '__';\n\n  var Provider = function (_Component) {\n    _inherits(Provider, _Component);\n\n    function Provider() {\n      var _temp, _this, _ret;\n\n      _classCallCheck(this, Provider);\n\n      for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      return _ret = (_temp = (_this = _possibleConstructorReturn(this, _Component.call.apply(_Component, [this].concat(args))), _this), _this.emitter = createEventEmitter(_this.props.value), _temp), _possibleConstructorReturn(_this, _ret);\n    }\n\n    Provider.prototype.getChildContext = function getChildContext() {\n      var _ref;\n\n      return _ref = {}, _ref[contextProp] = this.emitter, _ref;\n    };\n\n    Provider.prototype.componentWillReceiveProps = function componentWillReceiveProps(nextProps) {\n      if (this.props.value !== nextProps.value) {\n        var oldValue = this.props.value;\n        var newValue = nextProps.value;\n        var changedBits = void 0;\n\n        if (objectIs(oldValue, newValue)) {\n          changedBits = 0; // No change\n        } else {\n          changedBits = typeof calculateChangedBits === 'function' ? calculateChangedBits(oldValue, newValue) : MAX_SIGNED_31_BIT_INT;\n          if (process.env.NODE_ENV !== 'production') {\n            (0, _warning2.default)((changedBits & MAX_SIGNED_31_BIT_INT) === changedBits, 'calculateChangedBits: Expected the return value to be a ' + '31-bit integer. Instead received: %s', changedBits);\n          }\n\n          changedBits |= 0;\n\n          if (changedBits !== 0) {\n            this.emitter.set(nextProps.value, changedBits);\n          }\n        }\n      }\n    };\n\n    Provider.prototype.render = function render() {\n      return this.props.children;\n    };\n\n    return Provider;\n  }(_react.Component);\n\n  Provider.childContextTypes = (_Provider$childContex = {}, _Provider$childContex[contextProp] = _propTypes2.default.object.isRequired, _Provider$childContex);\n\n  var Consumer = function (_Component2) {\n    _inherits(Consumer, _Component2);\n\n    function Consumer() {\n      var _temp2, _this2, _ret2;\n\n      _classCallCheck(this, Consumer);\n\n      for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n        args[_key2] = arguments[_key2];\n      }\n\n      return _ret2 = (_temp2 = (_this2 = _possibleConstructorReturn(this, _Component2.call.apply(_Component2, [this].concat(args))), _this2), _this2.state = {\n        value: _this2.getValue()\n      }, _this2.onUpdate = function (newValue, changedBits) {\n        var observedBits = _this2.observedBits | 0;\n        if ((observedBits & changedBits) !== 0) {\n          _this2.setState({ value: _this2.getValue() });\n        }\n      }, _temp2), _possibleConstructorReturn(_this2, _ret2);\n    }\n\n    Consumer.prototype.componentWillReceiveProps = function componentWillReceiveProps(nextProps) {\n      var observedBits = nextProps.observedBits;\n\n      this.observedBits = observedBits === undefined || observedBits === null ? MAX_SIGNED_31_BIT_INT // Subscribe to all changes by default\n      : observedBits;\n    };\n\n    Consumer.prototype.componentDidMount = function componentDidMount() {\n      if (this.context[contextProp]) {\n        this.context[contextProp].on(this.onUpdate);\n      }\n      var observedBits = this.props.observedBits;\n\n      this.observedBits = observedBits === undefined || observedBits === null ? MAX_SIGNED_31_BIT_INT // Subscribe to all changes by default\n      : observedBits;\n    };\n\n    Consumer.prototype.componentWillUnmount = function componentWillUnmount() {\n      if (this.context[contextProp]) {\n        this.context[contextProp].off(this.onUpdate);\n      }\n    };\n\n    Consumer.prototype.getValue = function getValue() {\n      if (this.context[contextProp]) {\n        return this.context[contextProp].get();\n      } else {\n        return defaultValue;\n      }\n    };\n\n    Consumer.prototype.render = function render() {\n      return onlyChild(this.props.children)(this.state.value);\n    };\n\n    return Consumer;\n  }(_react.Component);\n\n  Consumer.contextTypes = (_Consumer$contextType = {}, _Consumer$contextType[contextProp] = _propTypes2.default.object, _Consumer$contextType);\n\n\n  return {\n    Provider: Provider,\n    Consumer: Consumer\n  };\n}\n\nexports.default = createReactContext;\nmodule.exports = exports['default'];"],"sourceRoot":""}