.config/coc/extensions/node_modules/coc-prettier/node_modules/core-js/modules/es.weak-map.js

   1 'use strict';
   2 var global = require('../internals/global');
   3 var redefineAll = require('../internals/redefine-all');
   4 var InternalMetadataModule = require('../internals/internal-metadata');
   5 var collection = require('../internals/collection');
   6 var collectionWeak = require('../internals/collection-weak');
   7 var isObject = require('../internals/is-object');
   8 var enforceIternalState = require('../internals/internal-state').enforce;
   9 var NATIVE_WEAK_MAP = require('../internals/native-weak-map');
  10
  11 var IS_IE11 = !global.ActiveXObject && 'ActiveXObject' in global;
  12 var isExtensible = Object.isExtensible;
  13 var InternalWeakMap;
  14
  15 var wrapper = function (init) {
  16   return function WeakMap() {
  17     return init(this, arguments.length ? arguments[0] : undefined);
  18   };
  19 };
  20
  21 // `WeakMap` constructor
  22 // https://tc39.es/ecma262/#sec-weakmap-constructor
  23 var $WeakMap = module.exports = collection('WeakMap', wrapper, collectionWeak);
  24
  25 // IE11 WeakMap frozen keys fix
  26 // We can't use feature detection because it crash some old IE builds
  27 // https://github.com/zloirock/core-js/issues/485
  28 if (NATIVE_WEAK_MAP && IS_IE11) {
  29   InternalWeakMap = collectionWeak.getConstructor(wrapper, 'WeakMap', true);
  30   InternalMetadataModule.REQUIRED = true;
  31   var WeakMapPrototype = $WeakMap.prototype;
  32   var nativeDelete = WeakMapPrototype['delete'];
  33   var nativeHas = WeakMapPrototype.has;
  34   var nativeGet = WeakMapPrototype.get;
  35   var nativeSet = WeakMapPrototype.set;
  36   redefineAll(WeakMapPrototype, {
  37     'delete': function (key) {
  38       if (isObject(key) && !isExtensible(key)) {
  39         var state = enforceIternalState(this);
  40         if (!state.frozen) state.frozen = new InternalWeakMap();
  41         return nativeDelete.call(this, key) || state.frozen['delete'](key);
  42       } return nativeDelete.call(this, key);
  43     },
  44     has: function has(key) {
  45       if (isObject(key) && !isExtensible(key)) {
  46         var state = enforceIternalState(this);
  47         if (!state.frozen) state.frozen = new InternalWeakMap();
  48         return nativeHas.call(this, key) || state.frozen.has(key);
  49       } return nativeHas.call(this, key);
  50     },
  51     get: function get(key) {
  52       if (isObject(key) && !isExtensible(key)) {
  53         var state = enforceIternalState(this);
  54         if (!state.frozen) state.frozen = new InternalWeakMap();
  55         return nativeHas.call(this, key) ? nativeGet.call(this, key) : state.frozen.get(key);
  56       } return nativeGet.call(this, key);
  57     },
  58     set: function set(key, value) {
  59       if (isObject(key) && !isExtensible(key)) {
  60         var state = enforceIternalState(this);
  61         if (!state.frozen) state.frozen = new InternalWeakMap();
  62         nativeHas.call(this, key) ? nativeSet.call(this, key, value) : state.frozen.set(key, value);
  63       } else nativeSet.call(this, key, value);
  64       return this;
  65     }
  66   });
  67 }