| | |
| | | '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 fails = require('../internals/fails'); |
| | | var hasOwn = require('../internals/has-own-property'); |
| | | var isArray = require('../internals/is-array'); |
| | | var isCallable = require('../internals/is-callable'); |
| | | var isObject = require('../internals/is-object'); |
| | | var isSymbol = require('../internals/is-symbol'); |
| | | var anObject = require('../internals/an-object'); |
| | | var toObject = require('../internals/to-object'); |
| | | var toIndexedObject = require('../internals/to-indexed-object'); |
| | | var toPropertyKey = require('../internals/to-property-key'); |
| | | var $toString = require('../internals/to-string'); |
| | | 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 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 $defineProperty = function defineProperty(O, P, Attributes) { |
| | | if (O === ObjectPrototype) $defineProperty(ObjectPrototypeSymbols, P, Attributes); |
| | | anObject(O); |
| | | var key = toPropertyKey(P); |
| | | anObject(Attributes); |
| | | if (hasOwn(AllSymbols, key)) { |
| | | if (!Attributes.enumerable) { |
| | | if (!hasOwn(O, HIDDEN)) nativeDefineProperty(O, HIDDEN, createPropertyDescriptor(1, {})); |
| | | O[HIDDEN][key] = true; |
| | | } else { |
| | | if (hasOwn(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 = toPropertyKey(V); |
| | | var enumerable = nativePropertyIsEnumerable.call(this, P); |
| | | if (this === ObjectPrototype && hasOwn(AllSymbols, P) && !hasOwn(ObjectPrototypeSymbols, P)) return false; |
| | | return enumerable || !hasOwn(this, P) || !hasOwn(AllSymbols, P) || hasOwn(this, HIDDEN) && this[HIDDEN][P] |
| | | ? enumerable : true; |
| | | }; |
| | | |
| | | var $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(O, P) { |
| | | var it = toIndexedObject(O); |
| | | var key = toPropertyKey(P); |
| | | if (it === ObjectPrototype && hasOwn(AllSymbols, key) && !hasOwn(ObjectPrototypeSymbols, key)) return; |
| | | var descriptor = nativeGetOwnPropertyDescriptor(it, key); |
| | | if (descriptor && hasOwn(AllSymbols, key) && !(hasOwn(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 (!hasOwn(AllSymbols, key) && !hasOwn(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 (hasOwn(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || hasOwn(ObjectPrototype, key))) { |
| | | result.push(AllSymbols[key]); |
| | | } |
| | | }); |
| | | return result; |
| | | }; |
| | | |
| | | // `Symbol` constructor |
| | | // https://tc39.es/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 : $toString(arguments[0]); |
| | | var tag = uid(description); |
| | | var setter = function (value) { |
| | | if (this === ObjectPrototype) setter.call(ObjectPrototypeSymbols, value); |
| | | if (hasOwn(this, HIDDEN) && hasOwn(this[HIDDEN], tag)) this[HIDDEN][tag] = false; |
| | | setSymbolDescriptor(this, tag, createPropertyDescriptor(1, value)); |
| | | }; |
| | | if (DESCRIPTORS && USE_SETTER) setSymbolDescriptor(ObjectPrototype, tag, { configurable: true, set: setter }); |
| | | return wrap(tag, description); |
| | | }; |
| | | |
| | | redefine($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.es/ecma262/#sec-symbol.for |
| | | 'for': function (key) { |
| | | var string = $toString(key); |
| | | if (hasOwn(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string]; |
| | | var symbol = $Symbol(string); |
| | | StringToSymbolRegistry[string] = symbol; |
| | | SymbolToStringRegistry[symbol] = string; |
| | | return symbol; |
| | | }, |
| | | // `Symbol.keyFor` method |
| | | // https://tc39.es/ecma262/#sec-symbol.keyfor |
| | | keyFor: function keyFor(sym) { |
| | | if (!isSymbol(sym)) throw TypeError(sym + ' is not a symbol'); |
| | | if (hasOwn(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.es/ecma262/#sec-object.create |
| | | create: $create, |
| | | // `Object.defineProperty` method |
| | | // https://tc39.es/ecma262/#sec-object.defineproperty |
| | | defineProperty: $defineProperty, |
| | | // `Object.defineProperties` method |
| | | // https://tc39.es/ecma262/#sec-object.defineproperties |
| | | defineProperties: $defineProperties, |
| | | // `Object.getOwnPropertyDescriptor` method |
| | | // https://tc39.es/ecma262/#sec-object.getownpropertydescriptors |
| | | getOwnPropertyDescriptor: $getOwnPropertyDescriptor |
| | | }); |
| | | |
| | | $({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL }, { |
| | | // `Object.getOwnPropertyNames` method |
| | | // https://tc39.es/ecma262/#sec-object.getownpropertynames |
| | | getOwnPropertyNames: $getOwnPropertyNames, |
| | | // `Object.getOwnPropertySymbols` method |
| | | // https://tc39.es/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 |
| | | $({ target: 'Object', stat: true, forced: fails(function () { getOwnPropertySymbolsModule.f(1); }) }, { |
| | | getOwnPropertySymbols: function getOwnPropertySymbols(it) { |
| | | return getOwnPropertySymbolsModule.f(toObject(it)); |
| | | } |
| | | }); |
| | | |
| | | // `JSON.stringify` method behavior with symbols |
| | | // https://tc39.es/ecma262/#sec-json.stringify |
| | | if ($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 -- required for `.length` |
| | | stringify: function stringify(it, replacer, space) { |
| | | var args = [it]; |
| | | var index = 1; |
| | | var $replacer; |
| | | while (arguments.length > index) args.push(arguments[index++]); |
| | | $replacer = replacer; |
| | | if (!isObject(replacer) && it === undefined || isSymbol(it)) return; // IE8 returns string on undefined |
| | | if (!isArray(replacer)) replacer = function (key, value) { |
| | | if (isCallable($replacer)) value = $replacer.call(this, key, value); |
| | | if (!isSymbol(value)) return value; |
| | | }; |
| | | args[1] = replacer; |
| | | return $stringify.apply(null, args); |
| | | } |
| | | }); |
| | | } |
| | | |
| | | // `Symbol.prototype[@@toPrimitive]` method |
| | | // https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive |
| | | if (!$Symbol[PROTOTYPE][TO_PRIMITIVE]) { |
| | | var valueOf = $Symbol[PROTOTYPE].valueOf; |
| | | redefine($Symbol[PROTOTYPE], TO_PRIMITIVE, function () { |
| | | return valueOf.apply(this, arguments); |
| | | }); |
| | | } |
| | | // `Symbol.prototype[@@toStringTag]` property |
| | | // https://tc39.es/ecma262/#sec-symbol.prototype-@@tostringtag |
| | | setToStringTag($Symbol, SYMBOL); |
| | | |
| | | hiddenKeys[HIDDEN] = true; |
| | | // TODO: Remove this module from `core-js@4` since it's split to modules listed below |
| | | require('../modules/es.symbol.constructor'); |
| | | require('../modules/es.symbol.for'); |
| | | require('../modules/es.symbol.key-for'); |
| | | require('../modules/es.json.stringify'); |
| | | require('../modules/es.object.get-own-property-symbols'); |