1 | 'use strict';
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2 | var FREEZING = require('../internals/freezing');
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3 | var global = require('../internals/global');
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4 | var uncurryThis = require('../internals/function-uncurry-this');
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5 | var defineBuiltIns = require('../internals/define-built-ins');
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6 | var InternalMetadataModule = require('../internals/internal-metadata');
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7 | var collection = require('../internals/collection');
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8 | var collectionWeak = require('../internals/collection-weak');
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9 | var isObject = require('../internals/is-object');
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10 | var enforceInternalState = require('../internals/internal-state').enforce;
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11 | var fails = require('../internals/fails');
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12 | var NATIVE_WEAK_MAP = require('../internals/weak-map-basic-detection');
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13 |
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14 | var $Object = Object;
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15 |
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16 | var isArray = Array.isArray;
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17 |
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18 | var isExtensible = $Object.isExtensible;
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19 |
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20 | var isFrozen = $Object.isFrozen;
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21 |
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22 | var isSealed = $Object.isSealed;
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23 |
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24 | var freeze = $Object.freeze;
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25 |
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26 | var seal = $Object.seal;
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27 |
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28 | var IS_IE11 = !global.ActiveXObject && 'ActiveXObject' in global;
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29 | var InternalWeakMap;
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30 |
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31 | var wrapper = function (init) {
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32 | return function WeakMap() {
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33 | return init(this, arguments.length ? arguments[0] : undefined);
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34 | };
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35 | };
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36 |
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37 |
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38 |
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39 | var $WeakMap = collection('WeakMap', wrapper, collectionWeak);
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40 | var WeakMapPrototype = $WeakMap.prototype;
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41 | var nativeSet = uncurryThis(WeakMapPrototype.set);
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42 |
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43 |
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44 | var hasMSEdgeFreezingBug = function () {
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45 | return FREEZING && fails(function () {
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46 | var frozenArray = freeze([]);
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47 | nativeSet(new $WeakMap(), frozenArray, 1);
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48 | return !isFrozen(frozenArray);
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49 | });
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50 | };
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51 |
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52 |
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53 |
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54 |
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55 | if (NATIVE_WEAK_MAP) if (IS_IE11) {
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56 | InternalWeakMap = collectionWeak.getConstructor(wrapper, 'WeakMap', true);
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57 | InternalMetadataModule.enable();
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58 | var nativeDelete = uncurryThis(WeakMapPrototype['delete']);
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59 | var nativeHas = uncurryThis(WeakMapPrototype.has);
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60 | var nativeGet = uncurryThis(WeakMapPrototype.get);
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61 | defineBuiltIns(WeakMapPrototype, {
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62 | 'delete': function (key) {
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63 | if (isObject(key) && !isExtensible(key)) {
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64 | var state = enforceInternalState(this);
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65 | if (!state.frozen) state.frozen = new InternalWeakMap();
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66 | return nativeDelete(this, key) || state.frozen['delete'](key);
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67 | } return nativeDelete(this, key);
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68 | },
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69 | has: function has(key) {
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70 | if (isObject(key) && !isExtensible(key)) {
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71 | var state = enforceInternalState(this);
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72 | if (!state.frozen) state.frozen = new InternalWeakMap();
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73 | return nativeHas(this, key) || state.frozen.has(key);
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74 | } return nativeHas(this, key);
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75 | },
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76 | get: function get(key) {
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77 | if (isObject(key) && !isExtensible(key)) {
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78 | var state = enforceInternalState(this);
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79 | if (!state.frozen) state.frozen = new InternalWeakMap();
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80 | return nativeHas(this, key) ? nativeGet(this, key) : state.frozen.get(key);
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81 | } return nativeGet(this, key);
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82 | },
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83 | set: function set(key, value) {
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84 | if (isObject(key) && !isExtensible(key)) {
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85 | var state = enforceInternalState(this);
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86 | if (!state.frozen) state.frozen = new InternalWeakMap();
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87 | nativeHas(this, key) ? nativeSet(this, key, value) : state.frozen.set(key, value);
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88 | } else nativeSet(this, key, value);
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89 | return this;
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90 | }
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91 | });
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92 |
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93 | } else if (hasMSEdgeFreezingBug()) {
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94 | defineBuiltIns(WeakMapPrototype, {
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95 | set: function set(key, value) {
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96 | var arrayIntegrityLevel;
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97 | if (isArray(key)) {
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98 | if (isFrozen(key)) arrayIntegrityLevel = freeze;
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99 | else if (isSealed(key)) arrayIntegrityLevel = seal;
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100 | }
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101 | nativeSet(this, key, value);
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102 | if (arrayIntegrityLevel) arrayIntegrityLevel(key);
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103 | return this;
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104 | }
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105 | });
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106 | }
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