.config/coc/extensions/node_modules/coc-prettier/node_modules/core-js/modules/esnext.iterator.constructor.js

   1 'use strict';
   2 // https://github.com/tc39/proposal-iterator-helpers
   3 var $ = require('../internals/export');
   4 var global = require('../internals/global');
   5 var anInstance = require('../internals/an-instance');
   6 var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
   7 var fails = require('../internals/fails');
   8 var has = require('../internals/has');
   9 var wellKnownSymbol = require('../internals/well-known-symbol');
  10 var IteratorPrototype = require('../internals/iterators-core').IteratorPrototype;
  11 var IS_PURE = require('../internals/is-pure');
  12
  13 var ITERATOR = wellKnownSymbol('iterator');
  14 var TO_STRING_TAG = wellKnownSymbol('toStringTag');
  15
  16 var NativeIterator = global.Iterator;
  17
  18 // FF56- have non-standard global helper `Iterator`
  19 var FORCED = IS_PURE
  20   || typeof NativeIterator != 'function'
  21   || NativeIterator.prototype !== IteratorPrototype
  22   // FF44- non-standard `Iterator` passes previous tests
  23   || !fails(function () { NativeIterator({}); });
  24
  25 var IteratorConstructor = function Iterator() {
  26   anInstance(this, IteratorConstructor);
  27 };
  28
  29 if (IS_PURE) {
  30   IteratorPrototype = {};
  31   createNonEnumerableProperty(IteratorPrototype, ITERATOR, function () {
  32     return this;
  33   });
  34 }
  35
  36 if (!has(IteratorPrototype, TO_STRING_TAG)) {
  37   createNonEnumerableProperty(IteratorPrototype, TO_STRING_TAG, 'Iterator');
  38 }
  39
  40 if (FORCED || !has(IteratorPrototype, 'constructor') || IteratorPrototype.constructor === Object) {
  41   createNonEnumerableProperty(IteratorPrototype, 'constructor', IteratorConstructor);
  42 }
  43
  44 IteratorConstructor.prototype = IteratorPrototype;
  45
  46 $({ global: true, forced: FORCED }, {
  47   Iterator: IteratorConstructor
  48 });