1 | 'use strict';
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2 | var NATIVE_WEAK_MAP = require('../internals/weak-map-basic-detection');
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3 | var globalThis = require('../internals/global-this');
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4 | var isObject = require('../internals/is-object');
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5 | var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
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6 | var hasOwn = require('../internals/has-own-property');
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7 | var shared = require('../internals/shared-store');
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8 | var sharedKey = require('../internals/shared-key');
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9 | var hiddenKeys = require('../internals/hidden-keys');
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10 |
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11 | var OBJECT_ALREADY_INITIALIZED = 'Object already initialized';
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12 | var TypeError = globalThis.TypeError;
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13 | var WeakMap = globalThis.WeakMap;
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14 | var set, get, has;
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15 |
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16 | var enforce = function (it) {
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17 | return has(it) ? get(it) : set(it, {});
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18 | };
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19 |
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20 | var getterFor = function (TYPE) {
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21 | return function (it) {
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22 | var state;
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23 | if (!isObject(it) || (state = get(it)).type !== TYPE) {
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24 | throw new TypeError('Incompatible receiver, ' + TYPE + ' required');
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25 | } return state;
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26 | };
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27 | };
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28 |
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29 | if (NATIVE_WEAK_MAP || shared.state) {
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30 | var store = shared.state || (shared.state = new WeakMap());
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31 | /* eslint-disable no-self-assign -- prototype methods protection */
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32 | store.get = store.get;
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33 | store.has = store.has;
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34 | store.set = store.set;
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35 | /* eslint-enable no-self-assign -- prototype methods protection */
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36 | set = function (it, metadata) {
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37 | if (store.has(it)) throw new TypeError(OBJECT_ALREADY_INITIALIZED);
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38 | metadata.facade = it;
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39 | store.set(it, metadata);
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40 | return metadata;
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41 | };
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42 | get = function (it) {
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43 | return store.get(it) || {};
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44 | };
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45 | has = function (it) {
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46 | return store.has(it);
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47 | };
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48 | } else {
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49 | var STATE = sharedKey('state');
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50 | hiddenKeys[STATE] = true;
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51 | set = function (it, metadata) {
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52 | if (hasOwn(it, STATE)) throw new TypeError(OBJECT_ALREADY_INITIALIZED);
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53 | metadata.facade = it;
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54 | createNonEnumerableProperty(it, STATE, metadata);
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55 | return metadata;
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56 | };
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57 | get = function (it) {
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58 | return hasOwn(it, STATE) ? it[STATE] : {};
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59 | };
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60 | has = function (it) {
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61 | return hasOwn(it, STATE);
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62 | };
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63 | }
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64 |
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65 | module.exports = {
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66 | set: set,
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67 | get: get,
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68 | has: has,
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69 | enforce: enforce,
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70 | getterFor: getterFor
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71 | };
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