56 lines
1.8 KiB
JavaScript
56 lines
1.8 KiB
JavaScript
'use strict';
|
|
var each = require('./_array-methods')(0)
|
|
, redefine = require('./_redefine')
|
|
, meta = require('./_meta')
|
|
, assign = require('./_object-assign')
|
|
, weak = require('./_collection-weak')
|
|
, isObject = require('./_is-object')
|
|
, getWeak = meta.getWeak
|
|
, isExtensible = Object.isExtensible
|
|
, uncaughtFrozenStore = weak.ufstore
|
|
, tmp = {}
|
|
, InternalMap;
|
|
|
|
var wrapper = function(get){
|
|
return function WeakMap(){
|
|
return get(this, arguments.length > 0 ? arguments[0] : undefined);
|
|
};
|
|
};
|
|
|
|
var methods = {
|
|
// 23.3.3.3 WeakMap.prototype.get(key)
|
|
get: function get(key){
|
|
if(isObject(key)){
|
|
var data = getWeak(key);
|
|
if(data === true)return uncaughtFrozenStore(this).get(key);
|
|
return data ? data[this._i] : undefined;
|
|
}
|
|
},
|
|
// 23.3.3.5 WeakMap.prototype.set(key, value)
|
|
set: function set(key, value){
|
|
return weak.def(this, key, value);
|
|
}
|
|
};
|
|
|
|
// 23.3 WeakMap Objects
|
|
var $WeakMap = module.exports = require('./_collection')('WeakMap', wrapper, methods, weak, true, true);
|
|
|
|
// IE11 WeakMap frozen keys fix
|
|
if(new $WeakMap().set((Object.freeze || Object)(tmp), 7).get(tmp) != 7){
|
|
InternalMap = weak.getConstructor(wrapper);
|
|
assign(InternalMap.prototype, methods);
|
|
meta.NEED = true;
|
|
each(['delete', 'has', 'get', 'set'], function(key){
|
|
var proto = $WeakMap.prototype
|
|
, method = proto[key];
|
|
redefine(proto, key, function(a, b){
|
|
// store frozen objects on internal weakmap shim
|
|
if(isObject(a) && !isExtensible(a)){
|
|
if(!this._f)this._f = new InternalMap;
|
|
var result = this._f[key](a, b);
|
|
return key == 'set' ? this : result;
|
|
// store all the rest on native weakmap
|
|
} return method.call(this, a, b);
|
|
});
|
|
});
|
|
} |