86 lines
2.7 KiB
JavaScript
86 lines
2.7 KiB
JavaScript
'use strict';
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var redefineAll = require('./_redefine-all');
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var getWeak = require('./_meta').getWeak;
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var anObject = require('./_an-object');
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var isObject = require('./_is-object');
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var anInstance = require('./_an-instance');
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var forOf = require('./_for-of');
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var createArrayMethod = require('./_array-methods');
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var $has = require('./_has');
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var validate = require('./_validate-collection');
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var arrayFind = createArrayMethod(5);
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var arrayFindIndex = createArrayMethod(6);
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var id = 0;
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// fallback for uncaught frozen keys
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var uncaughtFrozenStore = function (that) {
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return that._l || (that._l = new UncaughtFrozenStore());
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};
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var UncaughtFrozenStore = function () {
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this.a = [];
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};
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var findUncaughtFrozen = function (store, key) {
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return arrayFind(store.a, function (it) {
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return it[0] === key;
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});
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};
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UncaughtFrozenStore.prototype = {
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get: function (key) {
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var entry = findUncaughtFrozen(this, key);
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if (entry) return entry[1];
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},
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has: function (key) {
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return !!findUncaughtFrozen(this, key);
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},
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set: function (key, value) {
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var entry = findUncaughtFrozen(this, key);
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if (entry) entry[1] = value;
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else this.a.push([key, value]);
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},
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'delete': function (key) {
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var index = arrayFindIndex(this.a, function (it) {
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return it[0] === key;
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});
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if (~index) this.a.splice(index, 1);
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return !!~index;
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}
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};
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module.exports = {
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getConstructor: function (wrapper, NAME, IS_MAP, ADDER) {
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var C = wrapper(function (that, iterable) {
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anInstance(that, C, NAME, '_i');
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that._t = NAME; // collection type
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that._i = id++; // collection id
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that._l = undefined; // leak store for uncaught frozen objects
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if (iterable != undefined) forOf(iterable, IS_MAP, that[ADDER], that);
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});
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redefineAll(C.prototype, {
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// 23.3.3.2 WeakMap.prototype.delete(key)
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// 23.4.3.3 WeakSet.prototype.delete(value)
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'delete': function (key) {
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if (!isObject(key)) return false;
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var data = getWeak(key);
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if (data === true) return uncaughtFrozenStore(validate(this, NAME))['delete'](key);
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return data && $has(data, this._i) && delete data[this._i];
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},
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// 23.3.3.4 WeakMap.prototype.has(key)
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// 23.4.3.4 WeakSet.prototype.has(value)
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has: function has(key) {
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if (!isObject(key)) return false;
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var data = getWeak(key);
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if (data === true) return uncaughtFrozenStore(validate(this, NAME)).has(key);
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return data && $has(data, this._i);
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}
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});
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return C;
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},
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def: function (that, key, value) {
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var data = getWeak(anObject(key), true);
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if (data === true) uncaughtFrozenStore(that).set(key, value);
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else data[that._i] = value;
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return that;
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},
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ufstore: uncaughtFrozenStore
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};
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