|
|
- 'use strict';
-
- var GetIntrinsic = require('./GetIntrinsic');
-
- var ES2016 = require('./es2016');
- var assign = require('./helpers/assign');
- var forEach = require('./helpers/forEach');
- var callBind = require('./helpers/callBind');
-
- var $TypeError = GetIntrinsic('%TypeError%');
- var callBound = require('./helpers/callBound');
- var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable');
- var $pushApply = callBind.apply(GetIntrinsic('%Array.prototype.push%'));
- var $arrayPush = callBound('Array.prototype.push');
-
- var ES2017 = assign(assign({}, ES2016), {
- ToIndex: function ToIndex(value) {
- if (typeof value === 'undefined') {
- return 0;
- }
- var integerIndex = this.ToInteger(value);
- if (integerIndex < 0) {
- throw new RangeError('index must be >= 0');
- }
- var index = this.ToLength(integerIndex);
- if (!this.SameValueZero(integerIndex, index)) {
- throw new RangeError('index must be >= 0 and < 2 ** 53 - 1');
- }
- return index;
- },
-
- // https://www.ecma-international.org/ecma-262/8.0/#sec-enumerableownproperties
- EnumerableOwnProperties: function EnumerableOwnProperties(O, kind) {
- var keys = ES2016.EnumerableOwnNames(O);
- if (kind === 'key') {
- return keys;
- }
- if (kind === 'value' || kind === 'key+value') {
- var results = [];
- forEach(keys, function (key) {
- if ($isEnumerable(O, key)) {
- $pushApply(results, [
- kind === 'value' ? O[key] : [key, O[key]]
- ]);
- }
- });
- return results;
- }
- throw new $TypeError('Assertion failed: "kind" is not "key", "value", or "key+value": ' + kind);
- },
-
- // https://www.ecma-international.org/ecma-262/8.0/#sec-iterabletolist
- IterableToList: function IterableToList(items, method) {
- var iterator = this.GetIterator(items, method);
- var values = [];
- var next = true;
- while (next) {
- next = this.IteratorStep(iterator);
- if (next) {
- var nextValue = this.IteratorValue(next);
- $arrayPush(values, nextValue);
- }
- }
- return values;
- }
- });
-
- delete ES2017.EnumerableOwnNames; // replaced with EnumerableOwnProperties
- delete ES2017.IterableToArrayLike; // replaced with IterableToList
-
- module.exports = ES2017;
|