67 lines
2.2 KiB
JavaScript
67 lines
2.2 KiB
JavaScript
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'use strict';
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var setPrototypeOf = require('es5-ext/object/set-prototype-of')
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, object = require('es5-ext/object/valid-object')
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, value = require('es5-ext/object/valid-value')
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, randomUniq = require('es5-ext/string/random-uniq')
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, d = require('d')
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, getIterator = require('es6-iterator/get')
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, forOf = require('es6-iterator/for-of')
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, toStringTagSymbol = require('es6-symbol').toStringTag
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, isNative = require('./is-native-implemented')
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, isArray = Array.isArray, defineProperty = Object.defineProperty
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, hasOwnProperty = Object.prototype.hasOwnProperty, getPrototypeOf = Object.getPrototypeOf
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, WeakMapPoly;
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module.exports = WeakMapPoly = function (/*iterable*/) {
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var iterable = arguments[0], self;
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if (!(this instanceof WeakMapPoly)) throw new TypeError('Constructor requires \'new\'');
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if (isNative && setPrototypeOf && (WeakMap !== WeakMapPoly)) {
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self = setPrototypeOf(new WeakMap(), getPrototypeOf(this));
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} else {
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self = this;
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}
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if (iterable != null) {
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if (!isArray(iterable)) iterable = getIterator(iterable);
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}
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defineProperty(self, '__weakMapData__', d('c', '$weakMap$' + randomUniq()));
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if (!iterable) return self;
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forOf(iterable, function (val) {
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value(val);
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self.set(val[0], val[1]);
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});
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return self;
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};
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if (isNative) {
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if (setPrototypeOf) setPrototypeOf(WeakMapPoly, WeakMap);
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WeakMapPoly.prototype = Object.create(WeakMap.prototype, {
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constructor: d(WeakMapPoly)
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});
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}
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Object.defineProperties(WeakMapPoly.prototype, {
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delete: d(function (key) {
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if (hasOwnProperty.call(object(key), this.__weakMapData__)) {
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delete key[this.__weakMapData__];
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return true;
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}
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return false;
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}),
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get: d(function (key) {
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if (hasOwnProperty.call(object(key), this.__weakMapData__)) {
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return key[this.__weakMapData__];
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}
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}),
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has: d(function (key) {
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return hasOwnProperty.call(object(key), this.__weakMapData__);
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}),
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set: d(function (key, value) {
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defineProperty(object(key), this.__weakMapData__, d('c', value));
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return this;
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}),
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toString: d(function () { return '[object WeakMap]'; })
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});
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defineProperty(WeakMapPoly.prototype, toStringTagSymbol, d('c', 'WeakMap'));
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