From 82f4a44086b6648cf9082fa8c623100d1aa15748 Mon Sep 17 00:00:00 2001
From: Tim Yung <yungsters@fb.com>
Date: Sat, 12 Oct 2019 15:47:17 -0700
Subject: [PATCH] RN: Delete `toIterator`

Summary:
Deletes `toIterator` because there are no more call sites.

Changelog:
[Internal]

Reviewed By: TheSavior

Differential Revision: D17879834

fbshipit-source-id: 95679d7504c044d0e842bfcbdc07a8c33268f5d6
---
 Libraries/vendor/core/toIterator.js | 170 ----------------------------
 1 file changed, 170 deletions(-)
 delete mode 100644 Libraries/vendor/core/toIterator.js

diff --git a/Libraries/vendor/core/toIterator.js b/Libraries/vendor/core/toIterator.js
deleted file mode 100644
index c580edd2e66..00000000000
--- a/Libraries/vendor/core/toIterator.js
+++ /dev/null
@@ -1,170 +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.
- *
- * @format
- */
-
-'use strict';
-
-/**
- * Given an object `toIterator` will return the itrator for that object. If the
- * object has a `Symbol.iterator` method we just call that. Otherwise we
- * implement the ES6 `Array` and `String` Iterator.
- */
-
-/**
- * Constants
- */
-
-const KIND_KEY = 'key';
-const KIND_VALUE = 'value';
-const KIND_KEY_VAL = 'key+value';
-/*global Symbol: true*/
-const ITERATOR_SYMBOL =
-  typeof Symbol === 'function' ? Symbol.iterator : '@@iterator';
-
-const toIterator = (function() {
-  if (
-    !(Array.prototype[ITERATOR_SYMBOL] && String.prototype[ITERATOR_SYMBOL])
-  ) {
-    // IIFE to avoid creating classes for no reason because of hoisting.
-    return (function() {
-      class ArrayIterator {
-        // 22.1.5.1 CreateArrayIterator Abstract Operation
-        constructor(array, kind) {
-          if (!Array.isArray(array)) {
-            throw new TypeError('Object is not an Array');
-          }
-          this._iteratedObject = array;
-          this._kind = kind;
-          this._nextIndex = 0;
-        }
-
-        // 22.1.5.2.1 %ArrayIteratorPrototype%.next()
-        next() {
-          if (!this instanceof ArrayIterator) {
-            throw new TypeError('Object is not an ArrayIterator');
-          }
-
-          if (this._iteratedObject == null) {
-            return createIterResultObject(undefined, true);
-          }
-
-          const array = this._iteratedObject;
-          const len = this._iteratedObject.length;
-          const index = this._nextIndex;
-          const kind = this._kind;
-
-          if (index >= len) {
-            this._iteratedObject = undefined;
-            return createIterResultObject(undefined, true);
-          }
-
-          this._nextIndex = index + 1;
-
-          if (kind === KIND_KEY) {
-            return createIterResultObject(index, false);
-          } else if (kind === KIND_VALUE) {
-            return createIterResultObject(array[index], false);
-          } else if (kind === KIND_KEY_VAL) {
-            return createIterResultObject([index, array[index]], false);
-          }
-        }
-
-        // 22.1.5.2.2 %ArrayIteratorPrototype%[@@iterator]()
-        '@@iterator'() {
-          return this;
-        }
-      }
-
-      class StringIterator {
-        // 21.1.5.1 CreateStringIterator Abstract Operation
-        constructor(string) {
-          if (typeof string !== 'string') {
-            throw new TypeError('Object is not a string');
-          }
-          this._iteratedString = string;
-          this._nextIndex = 0;
-        }
-
-        // 21.1.5.2.1 %StringIteratorPrototype%.next()
-        next() {
-          if (!this instanceof StringIterator) {
-            throw new TypeError('Object is not a StringIterator');
-          }
-
-          if (this._iteratedString == null) {
-            return createIterResultObject(undefined, true);
-          }
-
-          const index = this._nextIndex;
-          const s = this._iteratedString;
-          const len = s.length;
-
-          if (index >= len) {
-            this._iteratedString = undefined;
-            return createIterResultObject(undefined, true);
-          }
-
-          let ret;
-          const first = s.charCodeAt(index);
-
-          if (first < 0xd800 || first > 0xdbff || index + 1 === len) {
-            ret = s[index];
-          } else {
-            const second = s.charCodeAt(index + 1);
-            if (second < 0xdc00 || second > 0xdfff) {
-              ret = s[index];
-            } else {
-              ret = s[index] + s[index + 1];
-            }
-          }
-
-          this._nextIndex = index + ret.length;
-
-          return createIterResultObject(ret, false);
-        }
-
-        // 21.1.5.2.2 %StringIteratorPrototype%[@@ITERATOR_SYMBOL]()
-        '@@iterator'() {
-          return this;
-        }
-      }
-
-      // 7.4.7 createIterResultObject(value, done)
-      function createIterResultObject(value, done) {
-        return {value: value, done: done};
-      }
-
-      return function(object, kind) {
-        if (typeof object === 'string') {
-          return new StringIterator(object);
-        } else if (Array.isArray(object)) {
-          return new ArrayIterator(object, kind || KIND_VALUE);
-        } else {
-          return object[ITERATOR_SYMBOL]();
-        }
-      };
-    })();
-  } else {
-    return function(object) {
-      return object[ITERATOR_SYMBOL]();
-    };
-  }
-})();
-
-/**
- * Export constants
- */
-
-Object.assign(toIterator, {
-  KIND_KEY,
-  KIND_VALUE,
-  KIND_KEY_VAL,
-  ITERATOR_SYMBOL,
-});
-
-module.exports = toIterator;