122 lines
3.8 KiB
JavaScript
122 lines
3.8 KiB
JavaScript
'use strict';
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var redefineAll = require('../internals/redefine-all');
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var getWeakData = require('../internals/internal-metadata').getWeakData;
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var anObject = require('../internals/an-object');
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var isObject = require('../internals/is-object');
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var anInstance = require('../internals/an-instance');
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var iterate = require('../internals/iterate');
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var ArrayIterationModule = require('../internals/array-iteration');
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var $has = require('../internals/has');
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var InternalStateModule = require('../internals/internal-state');
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var setInternalState = InternalStateModule.set;
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var internalStateGetterFor = InternalStateModule.getterFor;
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var find = ArrayIterationModule.find;
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var findIndex = ArrayIterationModule.findIndex;
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var id = 0;
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// fallback for uncaught frozen keys
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var uncaughtFrozenStore = function (store) {
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return store.frozen || (store.frozen = new UncaughtFrozenStore());
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};
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var UncaughtFrozenStore = function () {
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this.entries = [];
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};
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var findUncaughtFrozen = function (store, key) {
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return find(store.entries, 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.entries.push([key, value]);
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},
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'delete': function (key) {
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var index = findIndex(this.entries, function (it) {
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return it[0] === key;
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});
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if (~index) this.entries.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, CONSTRUCTOR_NAME, IS_MAP, ADDER) {
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var C = wrapper(function (that, iterable) {
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anInstance(that, C, CONSTRUCTOR_NAME);
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setInternalState(that, {
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type: CONSTRUCTOR_NAME,
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id: id++,
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frozen: undefined
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});
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if (iterable != undefined) iterate(iterable, that[ADDER], that, IS_MAP);
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});
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var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);
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var define = function (that, key, value) {
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var state = getInternalState(that);
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var data = getWeakData(anObject(key), true);
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if (data === true) uncaughtFrozenStore(state).set(key, value);
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else data[state.id] = value;
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return 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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var state = getInternalState(this);
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if (!isObject(key)) return false;
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var data = getWeakData(key);
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if (data === true) return uncaughtFrozenStore(state)['delete'](key);
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return data && $has(data, state.id) && delete data[state.id];
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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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var state = getInternalState(this);
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if (!isObject(key)) return false;
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var data = getWeakData(key);
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if (data === true) return uncaughtFrozenStore(state).has(key);
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return data && $has(data, state.id);
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}
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});
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redefineAll(C.prototype, IS_MAP ? {
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// 23.3.3.3 WeakMap.prototype.get(key)
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get: function get(key) {
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var state = getInternalState(this);
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if (isObject(key)) {
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var data = getWeakData(key);
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if (data === true) return uncaughtFrozenStore(state).get(key);
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return data ? data[state.id] : undefined;
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}
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},
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// 23.3.3.5 WeakMap.prototype.set(key, value)
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set: function set(key, value) {
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return define(this, key, value);
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}
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} : {
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// 23.4.3.1 WeakSet.prototype.add(value)
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add: function add(value) {
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return define(this, value, true);
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}
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});
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return C;
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}
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};
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