stuff

buildfiles/node_modules/core-js/internals/collection-weak.js

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+'use strict';
+var redefineAll = require('../internals/redefine-all');
+var getWeakData = require('../internals/internal-metadata').getWeakData;
+var anObject = require('../internals/an-object');
+var isObject = require('../internals/is-object');
+var anInstance = require('../internals/an-instance');
+var iterate = require('../internals/iterate');
+var ArrayIterationModule = require('../internals/array-iteration');
+var $has = require('../internals/has');
+var InternalStateModule = require('../internals/internal-state');
+
+var setInternalState = InternalStateModule.set;
+var internalStateGetterFor = InternalStateModule.getterFor;
+var find = ArrayIterationModule.find;
+var findIndex = ArrayIterationModule.findIndex;
+var id = 0;
+
+// fallback for uncaught frozen keys
+var uncaughtFrozenStore = function (store) {
+  return store.frozen || (store.frozen = new UncaughtFrozenStore());
+};
+
+var UncaughtFrozenStore = function () {
+  this.entries = [];
+};
+
+var findUncaughtFrozen = function (store, key) {
+  return find(store.entries, function (it) {
+    return it[0] === key;
+  });
+};
+
+UncaughtFrozenStore.prototype = {
+  get: function (key) {
+    var entry = findUncaughtFrozen(this, key);
+    if (entry) return entry[1];
+  },
+  has: function (key) {
+    return !!findUncaughtFrozen(this, key);
+  },
+  set: function (key, value) {
+    var entry = findUncaughtFrozen(this, key);
+    if (entry) entry[1] = value;
+    else this.entries.push([key, value]);
+  },
+  'delete': function (key) {
+    var index = findIndex(this.entries, function (it) {
+      return it[0] === key;
+    });
+    if (~index) this.entries.splice(index, 1);
+    return !!~index;
+  }
+};
+
+module.exports = {
+  getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {
+    var C = wrapper(function (that, iterable) {
+      anInstance(that, C, CONSTRUCTOR_NAME);
+      setInternalState(that, {
+        type: CONSTRUCTOR_NAME,
+        id: id++,
+        frozen: undefined
+      });
+      if (iterable != undefined) iterate(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
+    });
+
+    var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);
+
+    var define = function (that, key, value) {
+      var state = getInternalState(that);
+      var data = getWeakData(anObject(key), true);
+      if (data === true) uncaughtFrozenStore(state).set(key, value);
+      else data[state.id] = value;
+      return that;
+    };
+
+    redefineAll(C.prototype, {
+      // 23.3.3.2 WeakMap.prototype.delete(key)
+      // 23.4.3.3 WeakSet.prototype.delete(value)
+      'delete': function (key) {
+        var state = getInternalState(this);
+        if (!isObject(key)) return false;
+        var data = getWeakData(key);
+        if (data === true) return uncaughtFrozenStore(state)['delete'](key);
+        return data && $has(data, state.id) && delete data[state.id];
+      },
+      // 23.3.3.4 WeakMap.prototype.has(key)
+      // 23.4.3.4 WeakSet.prototype.has(value)
+      has: function has(key) {
+        var state = getInternalState(this);
+        if (!isObject(key)) return false;
+        var data = getWeakData(key);
+        if (data === true) return uncaughtFrozenStore(state).has(key);
+        return data && $has(data, state.id);
+      }
+    });
+
+    redefineAll(C.prototype, IS_MAP ? {
+      // 23.3.3.3 WeakMap.prototype.get(key)
+      get: function get(key) {
+        var state = getInternalState(this);
+        if (isObject(key)) {
+          var data = getWeakData(key);
+          if (data === true) return uncaughtFrozenStore(state).get(key);
+          return data ? data[state.id] : undefined;
+        }
+      },
+      // 23.3.3.5 WeakMap.prototype.set(key, value)
+      set: function set(key, value) {
+        return define(this, key, value);
+      }
+    } : {
+      // 23.4.3.1 WeakSet.prototype.add(value)
+      add: function add(value) {
+        return define(this, value, true);
+      }
+    });
+
+    return C;
+  }
+};