aaac7fed
 liuqimichale
add
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'use strict';
var setPrototypeOf = require('es5-ext/object/set-prototype-of')
, object = require('es5-ext/object/valid-object')
, value = 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
, hasOwnProperty = 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\'');
if (isNative && setPrototypeOf && (WeakMap !== WeakMapPoly)) {
self = setPrototypeOf(new WeakMap(), getPrototypeOf(this));
} else {
self = this;
}
if (iterable != null) {
if (!isArray(iterable)) iterable = getIterator(iterable);
}
defineProperty(self, '__weakMapData__', d('c', '$weakMap$' + randomUniq()));
if (!iterable) return self;
forOf(iterable, function (val) {
value(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 (hasOwnProperty.call(object(key), this.__weakMapData__)) {
delete key[this.__weakMapData__];
return true;
}
return false;
}),
get: d(function (key) {
if (hasOwnProperty.call(object(key), this.__weakMapData__)) {
return key[this.__weakMapData__];
}
}),
has: d(function (key) {
return hasOwnProperty.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'));
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