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