Rewriting Project

1 files changed, 311 insertions, 0 deletions

diff --git a/node_modules/core-js/modules/es.symbol.js b/node_modules/core-js/modules/es.symbol.js
new file mode 100644
index 0000000..07f1ee9
--- /dev/null
+++ b/node_modules/core-js/modules/es.symbol.js
@@ -0,0 +1,311 @@
+'use strict';
+var $ = require('../internals/export');
+var global = require('../internals/global');
+var getBuiltIn = require('../internals/get-built-in');
+var IS_PURE = require('../internals/is-pure');
+var DESCRIPTORS = require('../internals/descriptors');
+var NATIVE_SYMBOL = require('../internals/native-symbol');
+var USE_SYMBOL_AS_UID = require('../internals/use-symbol-as-uid');
+var fails = require('../internals/fails');
+var has = require('../internals/has');
+var isArray = require('../internals/is-array');
+var isObject = require('../internals/is-object');
+var anObject = require('../internals/an-object');
+var toObject = require('../internals/to-object');
+var toIndexedObject = require('../internals/to-indexed-object');
+var toPrimitive = require('../internals/to-primitive');
+var createPropertyDescriptor = require('../internals/create-property-descriptor');
+var nativeObjectCreate = require('../internals/object-create');
+var objectKeys = require('../internals/object-keys');
+var getOwnPropertyNamesModule = require('../internals/object-get-own-property-names');
+var getOwnPropertyNamesExternal = require('../internals/object-get-own-property-names-external');
+var getOwnPropertySymbolsModule = require('../internals/object-get-own-property-symbols');
+var getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');
+var definePropertyModule = require('../internals/object-define-property');
+var propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');
+var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
+var redefine = require('../internals/redefine');
+var shared = require('../internals/shared');
+var sharedKey = require('../internals/shared-key');
+var hiddenKeys = require('../internals/hidden-keys');
+var uid = require('../internals/uid');
+var wellKnownSymbol = require('../internals/well-known-symbol');
+var wrappedWellKnownSymbolModule = require('../internals/well-known-symbol-wrapped');
+var defineWellKnownSymbol = require('../internals/define-well-known-symbol');
+var setToStringTag = require('../internals/set-to-string-tag');
+var InternalStateModule = require('../internals/internal-state');
+var $forEach = require('../internals/array-iteration').forEach;
+
+var HIDDEN = sharedKey('hidden');
+var SYMBOL = 'Symbol';
+var PROTOTYPE = 'prototype';
+var TO_PRIMITIVE = wellKnownSymbol('toPrimitive');
+var setInternalState = InternalStateModule.set;
+var getInternalState = InternalStateModule.getterFor(SYMBOL);
+var ObjectPrototype = Object[PROTOTYPE];
+var $Symbol = global.Symbol;
+var $stringify = getBuiltIn('JSON', 'stringify');
+var nativeGetOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;
+var nativeDefineProperty = definePropertyModule.f;
+var nativeGetOwnPropertyNames = getOwnPropertyNamesExternal.f;
+var nativePropertyIsEnumerable = propertyIsEnumerableModule.f;
+var AllSymbols = shared('symbols');
+var ObjectPrototypeSymbols = shared('op-symbols');
+var StringToSymbolRegistry = shared('string-to-symbol-registry');
+var SymbolToStringRegistry = shared('symbol-to-string-registry');
+var WellKnownSymbolsStore = shared('wks');
+var QObject = global.QObject;
+// Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173
+var USE_SETTER = !QObject || !QObject[PROTOTYPE] || !QObject[PROTOTYPE].findChild;
+
+// fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687
+var setSymbolDescriptor = DESCRIPTORS && fails(function () {
+  return nativeObjectCreate(nativeDefineProperty({}, 'a', {
+    get: function () { return nativeDefineProperty(this, 'a', { value: 7 }).a; }
+  })).a != 7;
+}) ? function (O, P, Attributes) {
+  var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor(ObjectPrototype, P);
+  if (ObjectPrototypeDescriptor) delete ObjectPrototype[P];
+  nativeDefineProperty(O, P, Attributes);
+  if (ObjectPrototypeDescriptor && O !== ObjectPrototype) {
+    nativeDefineProperty(ObjectPrototype, P, ObjectPrototypeDescriptor);
+  }
+} : nativeDefineProperty;
+
+var wrap = function (tag, description) {
+  var symbol = AllSymbols[tag] = nativeObjectCreate($Symbol[PROTOTYPE]);
+  setInternalState(symbol, {
+    type: SYMBOL,
+    tag: tag,
+    description: description
+  });
+  if (!DESCRIPTORS) symbol.description = description;
+  return symbol;
+};
+
+var isSymbol = USE_SYMBOL_AS_UID ? function (it) {
+  return typeof it == 'symbol';
+} : function (it) {
+  return Object(it) instanceof $Symbol;
+};
+
+var $defineProperty = function defineProperty(O, P, Attributes) {
+  if (O === ObjectPrototype) $defineProperty(ObjectPrototypeSymbols, P, Attributes);
+  anObject(O);
+  var key = toPrimitive(P, true);
+  anObject(Attributes);
+  if (has(AllSymbols, key)) {
+    if (!Attributes.enumerable) {
+      if (!has(O, HIDDEN)) nativeDefineProperty(O, HIDDEN, createPropertyDescriptor(1, {}));
+      O[HIDDEN][key] = true;
+    } else {
+      if (has(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
+      Attributes = nativeObjectCreate(Attributes, { enumerable: createPropertyDescriptor(0, false) });
+    } return setSymbolDescriptor(O, key, Attributes);
+  } return nativeDefineProperty(O, key, Attributes);
+};
+
+var $defineProperties = function defineProperties(O, Properties) {
+  anObject(O);
+  var properties = toIndexedObject(Properties);
+  var keys = objectKeys(properties).concat($getOwnPropertySymbols(properties));
+  $forEach(keys, function (key) {
+    if (!DESCRIPTORS || $propertyIsEnumerable.call(properties, key)) $defineProperty(O, key, properties[key]);
+  });
+  return O;
+};
+
+var $create = function create(O, Properties) {
+  return Properties === undefined ? nativeObjectCreate(O) : $defineProperties(nativeObjectCreate(O), Properties);
+};
+
+var $propertyIsEnumerable = function propertyIsEnumerable(V) {
+  var P = toPrimitive(V, true);
+  var enumerable = nativePropertyIsEnumerable.call(this, P);
+  if (this === ObjectPrototype && has(AllSymbols, P) && !has(ObjectPrototypeSymbols, P)) return false;
+  return enumerable || !has(this, P) || !has(AllSymbols, P) || has(this, HIDDEN) && this[HIDDEN][P] ? enumerable : true;
+};
+
+var $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(O, P) {
+  var it = toIndexedObject(O);
+  var key = toPrimitive(P, true);
+  if (it === ObjectPrototype && has(AllSymbols, key) && !has(ObjectPrototypeSymbols, key)) return;
+  var descriptor = nativeGetOwnPropertyDescriptor(it, key);
+  if (descriptor && has(AllSymbols, key) && !(has(it, HIDDEN) && it[HIDDEN][key])) {
+    descriptor.enumerable = true;
+  }
+  return descriptor;
+};
+
+var $getOwnPropertyNames = function getOwnPropertyNames(O) {
+  var names = nativeGetOwnPropertyNames(toIndexedObject(O));
+  var result = [];
+  $forEach(names, function (key) {
+    if (!has(AllSymbols, key) && !has(hiddenKeys, key)) result.push(key);
+  });
+  return result;
+};
+
+var $getOwnPropertySymbols = function getOwnPropertySymbols(O) {
+  var IS_OBJECT_PROTOTYPE = O === ObjectPrototype;
+  var names = nativeGetOwnPropertyNames(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject(O));
+  var result = [];
+  $forEach(names, function (key) {
+    if (has(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has(ObjectPrototype, key))) {
+      result.push(AllSymbols[key]);
+    }
+  });
+  return result;
+};
+
+// `Symbol` constructor
+// https://tc39.github.io/ecma262/#sec-symbol-constructor
+if (!NATIVE_SYMBOL) {
+  $Symbol = function Symbol() {
+    if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor');
+    var description = !arguments.length || arguments[0] === undefined ? undefined : String(arguments[0]);
+    var tag = uid(description);
+    var setter = function (value) {
+      if (this === ObjectPrototype) setter.call(ObjectPrototypeSymbols, value);
+      if (has(this, HIDDEN) && has(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
+      setSymbolDescriptor(this, tag, createPropertyDescriptor(1, value));
+    };
+    if (DESCRIPTORS && USE_SETTER) setSymbolDescriptor(ObjectPrototype, tag, { configurable: true, set: setter });
+    return wrap(tag, description);
+  };
+
+  redefine($Symbol[PROTOTYPE], 'toString', function toString() {
+    return getInternalState(this).tag;
+  });
+
+  redefine($Symbol, 'withoutSetter', function (description) {
+    return wrap(uid(description), description);
+  });
+
+  propertyIsEnumerableModule.f = $propertyIsEnumerable;
+  definePropertyModule.f = $defineProperty;
+  getOwnPropertyDescriptorModule.f = $getOwnPropertyDescriptor;
+  getOwnPropertyNamesModule.f = getOwnPropertyNamesExternal.f = $getOwnPropertyNames;
+  getOwnPropertySymbolsModule.f = $getOwnPropertySymbols;
+
+  wrappedWellKnownSymbolModule.f = function (name) {
+    return wrap(wellKnownSymbol(name), name);
+  };
+
+  if (DESCRIPTORS) {
+    // https://github.com/tc39/proposal-Symbol-description
+    nativeDefineProperty($Symbol[PROTOTYPE], 'description', {
+      configurable: true,
+      get: function description() {
+        return getInternalState(this).description;
+      }
+    });
+    if (!IS_PURE) {
+      redefine(ObjectPrototype, 'propertyIsEnumerable', $propertyIsEnumerable, { unsafe: true });
+    }
+  }
+}
+
+$({ global: true, wrap: true, forced: !NATIVE_SYMBOL, sham: !NATIVE_SYMBOL }, {
+  Symbol: $Symbol
+});
+
+$forEach(objectKeys(WellKnownSymbolsStore), function (name) {
+  defineWellKnownSymbol(name);
+});
+
+$({ target: SYMBOL, stat: true, forced: !NATIVE_SYMBOL }, {
+  // `Symbol.for` method
+  // https://tc39.github.io/ecma262/#sec-symbol.for
+  'for': function (key) {
+    var string = String(key);
+    if (has(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];
+    var symbol = $Symbol(string);
+    StringToSymbolRegistry[string] = symbol;
+    SymbolToStringRegistry[symbol] = string;
+    return symbol;
+  },
+  // `Symbol.keyFor` method
+  // https://tc39.github.io/ecma262/#sec-symbol.keyfor
+  keyFor: function keyFor(sym) {
+    if (!isSymbol(sym)) throw TypeError(sym + ' is not a symbol');
+    if (has(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];
+  },
+  useSetter: function () { USE_SETTER = true; },
+  useSimple: function () { USE_SETTER = false; }
+});
+
+$({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL, sham: !DESCRIPTORS }, {
+  // `Object.create` method
+  // https://tc39.github.io/ecma262/#sec-object.create
+  create: $create,
+  // `Object.defineProperty` method
+  // https://tc39.github.io/ecma262/#sec-object.defineproperty
+  defineProperty: $defineProperty,
+  // `Object.defineProperties` method
+  // https://tc39.github.io/ecma262/#sec-object.defineproperties
+  defineProperties: $defineProperties,
+  // `Object.getOwnPropertyDescriptor` method
+  // https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptors
+  getOwnPropertyDescriptor: $getOwnPropertyDescriptor
+});
+
+$({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL }, {
+  // `Object.getOwnPropertyNames` method
+  // https://tc39.github.io/ecma262/#sec-object.getownpropertynames
+  getOwnPropertyNames: $getOwnPropertyNames,
+  // `Object.getOwnPropertySymbols` method
+  // https://tc39.github.io/ecma262/#sec-object.getownpropertysymbols
+  getOwnPropertySymbols: $getOwnPropertySymbols
+});
+
+// Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives
+// https://bugs.chromium.org/p/v8/issues/detail?id=3443
+$({ target: 'Object', stat: true, forced: fails(function () { getOwnPropertySymbolsModule.f(1); }) }, {
+  getOwnPropertySymbols: function getOwnPropertySymbols(it) {
+    return getOwnPropertySymbolsModule.f(toObject(it));
+  }
+});
+
+// `JSON.stringify` method behavior with symbols
+// https://tc39.github.io/ecma262/#sec-json.stringify
+if ($stringify) {
+  var FORCED_JSON_STRINGIFY = !NATIVE_SYMBOL || fails(function () {
+    var symbol = $Symbol();
+    // MS Edge converts symbol values to JSON as {}
+    return $stringify([symbol]) != '[null]'
+      // WebKit converts symbol values to JSON as null
+      || $stringify({ a: symbol }) != '{}'
+      // V8 throws on boxed symbols
+      || $stringify(Object(symbol)) != '{}';
+  });
+
+  $({ target: 'JSON', stat: true, forced: FORCED_JSON_STRINGIFY }, {
+    // eslint-disable-next-line no-unused-vars
+    stringify: function stringify(it, replacer, space) {
+      var args = [it];
+      var index = 1;
+      var $replacer;
+      while (arguments.length > index) args.push(arguments[index++]);
+      $replacer = replacer;
+      if (!isObject(replacer) && it === undefined || isSymbol(it)) return; // IE8 returns string on undefined
+      if (!isArray(replacer)) replacer = function (key, value) {
+        if (typeof $replacer == 'function') value = $replacer.call(this, key, value);
+        if (!isSymbol(value)) return value;
+      };
+      args[1] = replacer;
+      return $stringify.apply(null, args);
+    }
+  });
+}
+
+// `Symbol.prototype[@@toPrimitive]` method
+// https://tc39.github.io/ecma262/#sec-symbol.prototype-@@toprimitive
+if (!$Symbol[PROTOTYPE][TO_PRIMITIVE]) {
+  createNonEnumerableProperty($Symbol[PROTOTYPE], TO_PRIMITIVE, $Symbol[PROTOTYPE].valueOf);
+}
+// `Symbol.prototype[@@toStringTag]` property
+// https://tc39.github.io/ecma262/#sec-symbol.prototype-@@tostringtag
+setToStringTag($Symbol, SYMBOL);
+
+hiddenKeys[HIDDEN] = true;