You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
263 lines
11 KiB
263 lines
11 KiB
'use strict';
|
|
var $ = require('../internals/export');
|
|
var global = require('../internals/global');
|
|
var call = require('../internals/function-call');
|
|
var uncurryThis = require('../internals/function-uncurry-this');
|
|
var IS_PURE = require('../internals/is-pure');
|
|
var DESCRIPTORS = require('../internals/descriptors');
|
|
var NATIVE_SYMBOL = require('../internals/symbol-constructor-detection');
|
|
var fails = require('../internals/fails');
|
|
var hasOwn = require('../internals/has-own-property');
|
|
var isPrototypeOf = require('../internals/object-is-prototype-of');
|
|
var anObject = require('../internals/an-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 definePropertiesModule = require('../internals/object-define-properties');
|
|
var propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');
|
|
var defineBuiltIn = require('../internals/define-built-in');
|
|
var defineBuiltInAccessor = require('../internals/define-built-in-accessor');
|
|
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/well-known-symbol-define');
|
|
var defineSymbolToPrimitive = require('../internals/symbol-define-to-primitive');
|
|
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 setInternalState = InternalStateModule.set;
|
|
var getInternalState = InternalStateModule.getterFor(SYMBOL);
|
|
|
|
var ObjectPrototype = Object[PROTOTYPE];
|
|
var $Symbol = global.Symbol;
|
|
var SymbolPrototype = $Symbol && $Symbol[PROTOTYPE];
|
|
var RangeError = global.RangeError;
|
|
var TypeError = global.TypeError;
|
|
var QObject = global.QObject;
|
|
var nativeGetOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;
|
|
var nativeDefineProperty = definePropertyModule.f;
|
|
var nativeGetOwnPropertyNames = getOwnPropertyNamesExternal.f;
|
|
var nativePropertyIsEnumerable = propertyIsEnumerableModule.f;
|
|
var push = uncurryThis([].push);
|
|
|
|
var AllSymbols = shared('symbols');
|
|
var ObjectPrototypeSymbols = shared('op-symbols');
|
|
var WellKnownSymbolsStore = shared('wks');
|
|
|
|
// 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 fallbackDefineProperty = 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);
|
|
}
|
|
};
|
|
|
|
var setSymbolDescriptor = DESCRIPTORS && fails(function () {
|
|
return nativeObjectCreate(nativeDefineProperty({}, 'a', {
|
|
get: function () { return nativeDefineProperty(this, 'a', { value: 7 }).a; }
|
|
})).a !== 7;
|
|
}) ? fallbackDefineProperty : nativeDefineProperty;
|
|
|
|
var wrap = function (tag, description) {
|
|
var symbol = AllSymbols[tag] = nativeObjectCreate(SymbolPrototype);
|
|
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));
|
|
$forEach(keys, function (key) {
|
|
if (!DESCRIPTORS || call($propertyIsEnumerable, 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 = call(nativePropertyIsEnumerable, 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)) push(result, key);
|
|
});
|
|
return result;
|
|
};
|
|
|
|
var $getOwnPropertySymbols = function (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))) {
|
|
push(result, AllSymbols[key]);
|
|
}
|
|
});
|
|
return result;
|
|
};
|
|
|
|
// `Symbol` constructor
|
|
// https://tc39.es/ecma262/#sec-symbol-constructor
|
|
if (!NATIVE_SYMBOL) {
|
|
$Symbol = function Symbol() {
|
|
if (isPrototypeOf(SymbolPrototype, this)) throw new 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) {
|
|
var $this = this === undefined ? global : this;
|
|
if ($this === ObjectPrototype) call(setter, ObjectPrototypeSymbols, value);
|
|
if (hasOwn($this, HIDDEN) && hasOwn($this[HIDDEN], tag)) $this[HIDDEN][tag] = false;
|
|
var descriptor = createPropertyDescriptor(1, value);
|
|
try {
|
|
setSymbolDescriptor($this, tag, descriptor);
|
|
} catch (error) {
|
|
if (!(error instanceof RangeError)) throw error;
|
|
fallbackDefineProperty($this, tag, descriptor);
|
|
}
|
|
};
|
|
if (DESCRIPTORS && USE_SETTER) setSymbolDescriptor(ObjectPrototype, tag, { configurable: true, set: setter });
|
|
return wrap(tag, description);
|
|
};
|
|
|
|
SymbolPrototype = $Symbol[PROTOTYPE];
|
|
|
|
defineBuiltIn(SymbolPrototype, 'toString', function toString() {
|
|
return getInternalState(this).tag;
|
|
});
|
|
|
|
defineBuiltIn($Symbol, 'withoutSetter', function (description) {
|
|
return wrap(uid(description), description);
|
|
});
|
|
|
|
propertyIsEnumerableModule.f = $propertyIsEnumerable;
|
|
definePropertyModule.f = $defineProperty;
|
|
definePropertiesModule.f = $defineProperties;
|
|
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
|
|
defineBuiltInAccessor(SymbolPrototype, 'description', {
|
|
configurable: true,
|
|
get: function description() {
|
|
return getInternalState(this).description;
|
|
}
|
|
});
|
|
if (!IS_PURE) {
|
|
defineBuiltIn(ObjectPrototype, 'propertyIsEnumerable', $propertyIsEnumerable, { unsafe: true });
|
|
}
|
|
}
|
|
}
|
|
|
|
$({ global: true, constructor: 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 }, {
|
|
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: $getOwnPropertyNames
|
|
});
|
|
|
|
// `Symbol.prototype[@@toPrimitive]` method
|
|
// https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive
|
|
defineSymbolToPrimitive();
|
|
|
|
// `Symbol.prototype[@@toStringTag]` property
|
|
// https://tc39.es/ecma262/#sec-symbol.prototype-@@tostringtag
|
|
setToStringTag($Symbol, SYMBOL);
|
|
|
|
hiddenKeys[HIDDEN] = true;
|
|
|