diff options
Diffstat (limited to 'node_modules/core-js/modules/es6.weak-map.js')
| -rw-r--r-- | node_modules/core-js/modules/es6.weak-map.js | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/node_modules/core-js/modules/es6.weak-map.js b/node_modules/core-js/modules/es6.weak-map.js new file mode 100644 index 000000000..4109db336 --- /dev/null +++ b/node_modules/core-js/modules/es6.weak-map.js @@ -0,0 +1,56 @@ +'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); + }); + }); +}
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