66 lines
2.2 KiB
JavaScript
66 lines
2.2 KiB
JavaScript
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"use strict";
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var isValue = require("es5-ext/object/is-value")
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, setPrototypeOf = require("es5-ext/object/set-prototype-of")
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, object = require("es5-ext/object/valid-object")
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, ensureValue = 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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, objHasOwnProperty = 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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self = isNative && setPrototypeOf && (WeakMap !== WeakMapPoly)
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? setPrototypeOf(new WeakMap(), getPrototypeOf(this)) : this;
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if (isValue(iterable)) {
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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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ensureValue(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, { constructor: d(WeakMapPoly) });
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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 (objHasOwnProperty.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 (!objHasOwnProperty.call(object(key), this.__weakMapData__)) return undefined;
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return key[this.__weakMapData__];
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}),
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has: d(function (key) {
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return objHasOwnProperty.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 () {
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return "[object WeakMap]";
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})
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});
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defineProperty(WeakMapPoly.prototype, toStringTagSymbol, d("c", "WeakMap"));
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