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1 files changed, 59 insertions, 0 deletions

diff --git a/node_modules/core-js/library/modules/es6.weak-map.js b/node_modules/core-js/library/modules/es6.weak-map.js
new file mode 100644
index 00000000..f21556d7
--- /dev/null
+++ b/node_modules/core-js/library/modules/es6.weak-map.js
@@ -0,0 +1,59 @@
+'use strict';
+var each = require('./_array-methods')(0);
+var redefine = require('./_redefine');
+var meta = require('./_meta');
+var assign = require('./_object-assign');
+var weak = require('./_collection-weak');
+var isObject = require('./_is-object');
+var fails = require('./_fails');
+var validate = require('./_validate-collection');
+var WEAK_MAP = 'WeakMap';
+var getWeak = meta.getWeak;
+var isExtensible = Object.isExtensible;
+var uncaughtFrozenStore = weak.ufstore;
+var tmp = {};
+var 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(validate(this, WEAK_MAP)).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(validate(this, WEAK_MAP), key, value);
+  }
+};
+
+// 23.3 WeakMap Objects
+var $WeakMap = module.exports = require('./_collection')(WEAK_MAP, wrapper, methods, weak, true, true);
+
+// IE11 WeakMap frozen keys fix
+if (fails(function () { return new $WeakMap().set((Object.freeze || Object)(tmp), 7).get(tmp) != 7; })) {
+  InternalMap = weak.getConstructor(wrapper, WEAK_MAP);
+  assign(InternalMap.prototype, methods);
+  meta.NEED = true;
+  each(['delete', 'has', 'get', 'set'], function (key) {
+    var proto = $WeakMap.prototype;
+    var 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);
+    });
+  });
+}