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'use strict';
var global = require('../internals/global');
var uncurryThis = require('../internals/function-uncurry-this');
var redefineAll = require('../internals/redefine-all');
var InternalMetadataModule = require('../internals/internal-metadata');
var collection = require('../internals/collection');
var collectionWeak = require('../internals/collection-weak');
var isObject = require('../internals/is-object');
var enforceIternalState = require('../internals/internal-state').enforce;
var NATIVE_WEAK_MAP = require('../internals/native-weak-map');
var IS_IE11 = !global.ActiveXObject && 'ActiveXObject' in global;
// eslint-disable-next-line es/no-object-isextensible -- safe
var isExtensible = Object.isExtensible;
var InternalWeakMap;
var wrapper = function (init) {
return function WeakMap() {
return init(this, arguments.length ? arguments[0] : undefined);
};
};
// `WeakMap` constructor
// https://tc39.es/ecma262/#sec-weakmap-constructor
var $WeakMap = collection('WeakMap', wrapper, collectionWeak);
// IE11 WeakMap frozen keys fix
// We can't use feature detection because it crash some old IE builds
// https://github.com/zloirock/core-js/issues/485
if (NATIVE_WEAK_MAP && IS_IE11) {
InternalWeakMap = collectionWeak.getConstructor(wrapper, 'WeakMap', true);
InternalMetadataModule.enable();
var WeakMapPrototype = $WeakMap.prototype;
var nativeDelete = uncurryThis(WeakMapPrototype['delete']);
var nativeHas = uncurryThis(WeakMapPrototype.has);
var nativeGet = uncurryThis(WeakMapPrototype.get);
var nativeSet = uncurryThis(WeakMapPrototype.set);
redefineAll(WeakMapPrototype, {
'delete': function (key) {
if (isObject(key) && !isExtensible(key)) {
var state = enforceIternalState(this);
if (!state.frozen) state.frozen = new InternalWeakMap();
return nativeDelete(this, key) || state.frozen['delete'](key);
} return nativeDelete(this, key);
},
has: function has(key) {
if (isObject(key) && !isExtensible(key)) {
var state = enforceIternalState(this);
if (!state.frozen) state.frozen = new InternalWeakMap();
return nativeHas(this, key) || state.frozen.has(key);
} return nativeHas(this, key);
},
get: function get(key) {
if (isObject(key) && !isExtensible(key)) {
var state = enforceIternalState(this);
if (!state.frozen) state.frozen = new InternalWeakMap();
return nativeHas(this, key) ? nativeGet(this, key) : state.frozen.get(key);
} return nativeGet(this, key);
},
set: function set(key, value) {
if (isObject(key) && !isExtensible(key)) {
var state = enforceIternalState(this);
if (!state.frozen) state.frozen = new InternalWeakMap();
nativeHas(this, key) ? nativeSet(this, key, value) : state.frozen.set(key, value);
} else nativeSet(this, key, value);
return this;
}
});
}