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65 lines
2.2 KiB
65 lines
2.2 KiB
"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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