From b9798d6269e3f6aef6d5aa32eb42c5447e587e9f Mon Sep 17 00:00:00 2001
From: Janic Duplessis <janicduplessis@gmail.com>
Date: Sun, 23 Sep 2018 23:29:01 -0400
Subject: [PATCH] Remove global babelHelpers and regenerator

---
 .../RCTRootViewIntegrationTestApp.js          |   2 -
 Libraries/Core/InitializeCore.js              |  12 -
 Libraries/polyfills/babelHelpers.js           | 606 ------------------
 jest/setup.js                                 |   2 -
 rn-get-polyfills.js                           |   1 -
 5 files changed, 623 deletions(-)
 delete mode 100644 Libraries/polyfills/babelHelpers.js

diff --git a/IntegrationTests/RCTRootViewIntegrationTestApp.js b/IntegrationTests/RCTRootViewIntegrationTestApp.js
index edc64819c132fd..2466b6378586eb 100644
--- a/IntegrationTests/RCTRootViewIntegrationTestApp.js
+++ b/IntegrationTests/RCTRootViewIntegrationTestApp.js
@@ -9,8 +9,6 @@
 
 'use strict';
 
-require('regenerator-runtime/runtime');
-
 const React = require('react');
 const ReactNative = require('react-native');
 
diff --git a/Libraries/Core/InitializeCore.js b/Libraries/Core/InitializeCore.js
index 5fcceab22909fb..db1eb480ab09bd 100644
--- a/Libraries/Core/InitializeCore.js
+++ b/Libraries/Core/InitializeCore.js
@@ -86,18 +86,6 @@ ReactNativeVersionCheck.checkVersions();
 // ERROR: Event loop not supported.
 polyfillGlobal('Promise', () => require('Promise'));
 
-// Set up regenerator.
-polyfillGlobal('regeneratorRuntime', () => {
-  // The require just sets up the global, so make sure when we first
-  // invoke it the global does not exist
-  delete global.regeneratorRuntime;
-  /* $FlowFixMe(>=0.54.0 site=react_native_oss) This comment suppresses an
-   * error found when Flow v0.54 was deployed. To see the error delete this
-   * comment and run Flow. */
-  require('regenerator-runtime/runtime');
-  return global.regeneratorRuntime;
-});
-
 // Set up timers
 const defineLazyTimer = name => {
   polyfillGlobal(name, () => require('JSTimers')[name]);
diff --git a/Libraries/polyfills/babelHelpers.js b/Libraries/polyfills/babelHelpers.js
deleted file mode 100644
index 47bc2440094200..00000000000000
--- a/Libraries/polyfills/babelHelpers.js
+++ /dev/null
@@ -1,606 +0,0 @@
-/**
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * Regenerate through
- *    `js1 upgrade babel-helpers` + manual tweaks
- *
- * Components used for this file;
- *   - arrayWithHoles
- *   - arrayWithoutHoles
- *   - assertThisInitialized
- *   - classCallCheck
- *   - construct
- *   - createClass
- *   - defineProperty
- *   - extends
- *   - get
- *   - getPrototypeOf
- *   - inherits
- *   - interopRequireDefault
- *   - interopRequireWildcard
- *   - iterableToArray
- *   - iterableToArrayLimit
- *   - nonIterableRest
- *   - nonIterableSpread
- *   - objectSpread
- *   - objectWithoutProperties
- *   - possibleConstructorReturn
- *   - setPrototypeOf
- *   - slicedToArray
- *   - superPropBase
- *   - taggedTemplateLiteral
- *   - taggedTemplateLiteralLoose
- *   - toArray
- *   - toConsumableArray
- *   - wrapNativeSuper
- *
- * @flow
- * @generated (with babel 7.0.0-beta.47)
- * @format
- * @nolint
- * @polyfill
- */
-
-'use strict';
-
-var babelHelpers = (global.babelHelpers = {});
-
-// ### classCallCheck ###
-
-function _classCallCheck(instance, Constructor) {
-  if (!(instance instanceof Constructor)) {
-    throw new TypeError('Cannot call a class as a function');
-  }
-}
-
-babelHelpers.classCallCheck = _classCallCheck;
-
-// ### createClass ###
-
-function _defineProperties(target, props) {
-  for (var i = 0; i < props.length; i++) {
-    var descriptor = props[i];
-    descriptor.enumerable = descriptor.enumerable || false;
-    descriptor.configurable = true;
-    if ('value' in descriptor) {
-      descriptor.writable = true;
-    }
-    Object.defineProperty(target, descriptor.key, descriptor);
-  }
-}
-
-function _createClass(Constructor, protoProps, staticProps) {
-  if (protoProps) {
-    _defineProperties(Constructor.prototype, protoProps);
-  }
-  if (staticProps) {
-    _defineProperties(Constructor, staticProps);
-  }
-  return Constructor;
-}
-
-babelHelpers.createClass = _createClass;
-
-// ### defineProperty ###
-
-function _defineProperty(obj, key, value) {
-  if (key in obj) {
-    Object.defineProperty(obj, key, {
-      value: value,
-      enumerable: true,
-      configurable: true,
-      writable: true,
-    });
-  } else {
-    obj[key] = value;
-  }
-
-  return obj;
-}
-
-babelHelpers.defineProperty = _defineProperty;
-
-// ### extends ###
-
-function _extends() {
-  babelHelpers.extends = _extends =
-    Object.assign ||
-    function(target) {
-      for (var i = 1; i < arguments.length; i++) {
-        var source = arguments[i];
-
-        for (var key in source) {
-          if (Object.prototype.hasOwnProperty.call(source, key)) {
-            target[key] = source[key];
-          }
-        }
-      }
-
-      return target;
-    };
-
-  return _extends.apply(this, arguments);
-}
-
-babelHelpers.extends = _extends;
-
-// ### setPrototypeOf ###
-
-function _setPrototypeOf(o, p) {
-  babelHelpers.setPrototypeOf = _setPrototypeOf =
-    Object.setPrototypeOf ||
-    function _setPrototypeOf(o, p) {
-      o.__proto__ = p;
-      return o;
-    };
-
-  return _setPrototypeOf(o, p);
-}
-
-babelHelpers.setPrototypeOf = _setPrototypeOf;
-
-// ### superPropBase ###
-
-function _superPropBase(object, property) {
-  while (!Object.prototype.hasOwnProperty.call(object, property)) {
-    object = babelHelpers.getPrototypeOf(object);
-    if (object === null) {
-      break;
-    }
-  }
-
-  return object;
-}
-
-babelHelpers.superPropBase = _superPropBase;
-
-// ### get ###
-
-// FB:
-// TODO: prepack does not like Reflect (and we can use the fallback just fine)
-// function _get(target, property, receiver) {
-//   if (typeof Reflect !== 'undefined' && Reflect.get) {
-//     babelHelpers.get = _get = Reflect.get;
-//   } else {
-//     babelHelpers.get = _get = function _get(target, property, receiver) {
-//       var base = babelHelpers.superPropBase(target, property);
-//       if (!base) {
-//         return;
-//       }
-//       var desc = Object.getOwnPropertyDescriptor(base, property);
-//
-//       if (desc.get) {
-//         return desc.get.call(receiver);
-//       }
-//
-//       return desc.value;
-//     };
-//   }
-//
-//   return _get(target, property, receiver || target);
-// }
-//
-// babelHelpers.get = _get;
-
-babelHelpers.get = function _get(target, property, receiver = target) {
-  var base = babelHelpers.superPropBase(target, property);
-  if (!base) {
-    return;
-  }
-  var desc = Object.getOwnPropertyDescriptor(base, property);
-
-  if (desc.get) {
-    return desc.get.call(receiver);
-  }
-
-  return desc.value;
-};
-
-// ### inherits ###
-
-function _inherits(subClass, superClass) {
-  if (typeof superClass !== 'function' && superClass !== null) {
-    throw new TypeError('Super expression must either be null or a function');
-  }
-
-  babelHelpers.setPrototypeOf(
-    subClass.prototype,
-    superClass && superClass.prototype,
-  );
-  if (superClass) {
-    babelHelpers.setPrototypeOf(subClass, superClass);
-  }
-}
-
-babelHelpers.inherits = _inherits;
-
-// ### construct ###
-
-function _construct(Parent, args, Class) {
-  // FB:
-  // TODO: prepack does not like this line (and we can use the fallback just fine)
-  // if (typeof Reflect !== 'undefined' && Reflect.construct) {
-  //   babelHelpers.construct = _construct = Reflect.construct;
-  // } else {
-  babelHelpers.construct = _construct = function _construct(
-    Parent,
-    args,
-    Class,
-  ) {
-    var a = [null];
-    a.push.apply(a, args);
-    var Constructor = Parent.bind.apply(Parent, a);
-    var instance = new Constructor();
-    if (Class) {
-      babelHelpers.setPrototypeOf(instance, Class.prototype);
-    }
-    return instance;
-  };
-  // }
-
-  return _construct.apply(null, arguments);
-}
-
-babelHelpers.construct = _construct;
-
-// ### getPrototypeOf ###
-
-function _getPrototypeOf(o) {
-  babelHelpers.getPrototypeOf = _getPrototypeOf =
-    Object.getPrototypeOf ||
-    function _getPrototypeOf(o) {
-      return o.__proto__;
-    };
-
-  return _getPrototypeOf(o);
-}
-
-babelHelpers.getPrototypeOf = _getPrototypeOf;
-
-// ### assertThisInitialized ###
-
-function _assertThisInitialized(self) {
-  if (self === void 0) {
-    throw new ReferenceError(
-      "this hasn't been initialised - super() hasn't been called",
-    );
-  }
-
-  return self;
-}
-
-babelHelpers.assertThisInitialized = _assertThisInitialized;
-
-// ### wrapNativeSuper ###
-
-function _wrapNativeSuper(Class) {
-  var _cache = typeof Map === 'function' ? new Map() : undefined;
-
-  babelHelpers.wrapNativeSuper = _wrapNativeSuper = function _wrapNativeSuper(
-    Class,
-  ) {
-    if (typeof Class !== 'function') {
-      throw new TypeError('Super expression must either be null or a function');
-    }
-
-    if (typeof _cache !== 'undefined') {
-      if (_cache.has(Class)) {
-        return _cache.get(Class);
-      }
-
-      _cache.set(Class, Wrapper);
-    }
-
-    function Wrapper() {
-      // FB:
-      // this is a temporary fix for a babel bug (it's invoking the wrong func
-      // when you do `super()`)
-      return _construct(Class, arguments, _getPrototypeOf(this).constructor);
-    }
-
-    Wrapper.prototype = Object.create(Class.prototype, {
-      constructor: {
-        value: Wrapper,
-        enumerable: false,
-        writable: true,
-        configurable: true,
-      },
-    });
-    return babelHelpers.setPrototypeOf(
-      Wrapper,
-      babelHelpers.setPrototypeOf(function Super() {
-        return babelHelpers.construct(
-          Class,
-          arguments,
-          babelHelpers.getPrototypeOf(this).constructor,
-        );
-      }, Class),
-    );
-  };
-
-  return _wrapNativeSuper(Class);
-}
-
-babelHelpers.wrapNativeSuper = _wrapNativeSuper;
-
-// ### interopRequireDefault ###
-
-function _interopRequireDefault(obj) {
-  return obj && obj.__esModule
-    ? obj
-    : {
-        default: obj,
-      };
-}
-
-babelHelpers.interopRequireDefault = _interopRequireDefault;
-
-// ### interopRequireWildcard ###
-
-function _interopRequireWildcard(obj) {
-  if (obj && obj.__esModule) {
-    return obj;
-  } else {
-    var newObj = {};
-
-    if (obj != null) {
-      for (var key in obj) {
-        if (Object.prototype.hasOwnProperty.call(obj, key)) {
-          var desc =
-            Object.defineProperty && Object.getOwnPropertyDescriptor
-              ? Object.getOwnPropertyDescriptor(obj, key)
-              : {};
-
-          if (desc.get || desc.set) {
-            Object.defineProperty(newObj, key, desc);
-          } else {
-            newObj[key] = obj[key];
-          }
-        }
-      }
-    }
-
-    newObj.default = obj;
-    return newObj;
-  }
-}
-
-babelHelpers.interopRequireWildcard = _interopRequireWildcard;
-
-// ### objectWithoutProperties ###
-
-function _objectWithoutProperties(source, excluded) {
-  if (source == null) {
-    return {};
-  }
-  var target = {};
-  var sourceKeys = Object.keys(source);
-  var key, i;
-
-  for (i = 0; i < sourceKeys.length; i++) {
-    key = sourceKeys[i];
-    if (excluded.indexOf(key) >= 0) {
-      continue;
-    }
-    target[key] = source[key];
-  }
-
-  if (Object.getOwnPropertySymbols) {
-    var sourceSymbolKeys = Object.getOwnPropertySymbols(source);
-
-    for (i = 0; i < sourceSymbolKeys.length; i++) {
-      key = sourceSymbolKeys[i];
-      if (excluded.indexOf(key) >= 0) {
-        continue;
-      }
-      if (!Object.prototype.propertyIsEnumerable.call(source, key)) {
-        continue;
-      }
-      target[key] = source[key];
-    }
-  }
-
-  return target;
-}
-
-babelHelpers.objectWithoutProperties = _objectWithoutProperties;
-
-// ### possibleConstructorReturn ###
-
-function _possibleConstructorReturn(self, call) {
-  if (call && (typeof call === 'object' || typeof call === 'function')) {
-    return call;
-  }
-
-  return babelHelpers.assertThisInitialized(self);
-}
-
-babelHelpers.possibleConstructorReturn = _possibleConstructorReturn;
-
-// ### arrayWithHoles ###
-
-function _arrayWithHoles(arr) {
-  if (Array.isArray(arr)) {
-    return arr;
-  }
-}
-
-babelHelpers.arrayWithHoles = _arrayWithHoles;
-
-// ### arrayWithoutHoles ###
-
-function _arrayWithoutHoles(arr) {
-  if (Array.isArray(arr)) {
-    for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) {
-      arr2[i] = arr[i];
-    }
-
-    return arr2;
-  }
-}
-
-babelHelpers.arrayWithoutHoles = _arrayWithoutHoles;
-
-// ### iterableToArrayLimit ###
-
-function _iterableToArrayLimit(arr, i) {
-  var _arr = [];
-  var _n = true;
-  var _d = false;
-  var _e = undefined;
-
-  try {
-    for (
-      var _i = arr[Symbol.iterator](), _s;
-      !(_n = (_s = _i.next()).done);
-      _n = true
-    ) {
-      _arr.push(_s.value);
-
-      if (i && _arr.length === i) {
-        break;
-      }
-    }
-  } catch (err) {
-    _d = true;
-    _e = err;
-  } finally {
-    try {
-      if (!_n && _i.return != null) {
-        _i.return();
-      }
-    } finally {
-      if (_d) {
-        throw _e;
-      }
-    }
-  }
-
-  return _arr;
-}
-
-babelHelpers.iterableToArrayLimit = _iterableToArrayLimit;
-
-// ### nonIterableRest ###
-
-function _nonIterableRest() {
-  throw new TypeError('Invalid attempt to destructure non-iterable instance');
-}
-
-babelHelpers.nonIterableRest = _nonIterableRest;
-
-// ### nonIterableSpread ###
-
-function _nonIterableSpread() {
-  throw new TypeError('Invalid attempt to spread non-iterable instance');
-}
-
-babelHelpers.nonIterableSpread = _nonIterableSpread;
-
-// ### slicedToArray ###
-
-function _slicedToArray(arr, i) {
-  return (
-    babelHelpers.arrayWithHoles(arr) ||
-    babelHelpers.iterableToArrayLimit(arr, i) ||
-    babelHelpers.nonIterableRest()
-  );
-}
-
-babelHelpers.slicedToArray = _slicedToArray;
-
-// ### taggedTemplateLiteral ###
-
-function _taggedTemplateLiteral(strings, raw) {
-  if (!raw) {
-    raw = strings.slice(0);
-  }
-
-  return Object.freeze(
-    Object.defineProperties(strings, {
-      raw: {
-        value: Object.freeze(raw),
-      },
-    }),
-  );
-}
-
-babelHelpers.taggedTemplateLiteral = _taggedTemplateLiteral;
-
-// ### toArray ###
-
-function _toArray(arr) {
-  return (
-    babelHelpers.arrayWithHoles(arr) ||
-    babelHelpers.iterableToArray(arr) ||
-    babelHelpers.nonIterableRest()
-  );
-}
-
-babelHelpers.toArray = _toArray;
-
-// ### toConsumableArray ###
-
-function _toConsumableArray(arr) {
-  return (
-    babelHelpers.arrayWithoutHoles(arr) ||
-    babelHelpers.iterableToArray(arr) ||
-    babelHelpers.nonIterableSpread()
-  );
-}
-
-babelHelpers.toConsumableArray = _toConsumableArray;
-
-// ### taggedTemplateLiteralLoose ###
-
-function _taggedTemplateLiteralLoose(strings, raw) {
-  if (!raw) {
-    raw = strings.slice(0);
-  }
-
-  strings.raw = raw;
-  return strings;
-}
-
-babelHelpers.taggedTemplateLiteralLoose = _taggedTemplateLiteralLoose;
-
-// ### objectSpread ###
-
-function _objectSpread(target) {
-  for (var i = 1; i < arguments.length; i++) {
-    var source = arguments[i] != null ? arguments[i] : {};
-    var ownKeys = Object.keys(source);
-
-    if (typeof Object.getOwnPropertySymbols === 'function') {
-      ownKeys = ownKeys.concat(
-        Object.getOwnPropertySymbols(source).filter(function(sym) {
-          return Object.getOwnPropertyDescriptor(source, sym).enumerable;
-        }),
-      );
-    }
-
-    ownKeys.forEach(function(key) {
-      babelHelpers.defineProperty(target, key, source[key]);
-    });
-  }
-
-  return target;
-}
-
-babelHelpers.objectSpread = _objectSpread;
-
-// ### iterableToArray ###
-
-function _iterableToArray(iter) {
-  if (
-    Symbol.iterator in Object(iter) ||
-    Object.prototype.toString.call(iter) === '[object Arguments]'
-  ) {
-    return Array.from(iter);
-  }
-}
-
-babelHelpers.iterableToArray = _iterableToArray;
diff --git a/jest/setup.js b/jest/setup.js
index 1587b431f0e2e0..0e1fdd17555342 100644
--- a/jest/setup.js
+++ b/jest/setup.js
@@ -12,7 +12,6 @@
 const MockNativeMethods = require.requireActual('./MockNativeMethods');
 const mockComponent = require.requireActual('./mockComponent');
 
-require.requireActual('../Libraries/polyfills/babelHelpers.js');
 require.requireActual('../Libraries/polyfills/Object.es7.js');
 require.requireActual('../Libraries/polyfills/error-guard');
 
@@ -92,7 +91,6 @@ jest
   })
   .mock('ensureComponentIsNative', () => () => true);
 
-const mockEmptyObject = {};
 const mockNativeModules = {
   AlertManager: {
     alertWithArgs: jest.fn(),
diff --git a/rn-get-polyfills.js b/rn-get-polyfills.js
index 769bf876b925c0..121fa00ab66543 100644
--- a/rn-get-polyfills.js
+++ b/rn-get-polyfills.js
@@ -18,5 +18,4 @@ module.exports = () => [
   require.resolve('./Libraries/polyfills/Array.prototype.es6.js'),
   require.resolve('./Libraries/polyfills/Array.es6.js'),
   require.resolve('./Libraries/polyfills/Object.es7.js'),
-  require.resolve('./Libraries/polyfills/babelHelpers.js'),
 ];