| 'use strict'; |
| |
| var GetIntrinsic = require('get-intrinsic'); |
| |
| var $TypeError = GetIntrinsic('%TypeError%'); |
| |
| var getIteratorMethod = require('../helpers/getIteratorMethod'); |
| var AdvanceStringIndex = require('./AdvanceStringIndex'); |
| var Call = require('./Call'); |
| var GetMethod = require('./GetMethod'); |
| var IsArray = require('./IsArray'); |
| var Type = require('./Type'); |
| |
| // https://ecma-international.org/ecma-262/6.0/#sec-getiterator |
| |
| module.exports = function GetIterator(obj, method) { |
| var actualMethod = method; |
| if (arguments.length < 2) { |
| actualMethod = getIteratorMethod( |
| { |
| AdvanceStringIndex: AdvanceStringIndex, |
| GetMethod: GetMethod, |
| IsArray: IsArray, |
| Type: Type |
| }, |
| obj |
| ); |
| } |
| var iterator = Call(actualMethod, obj); |
| if (Type(iterator) !== 'Object') { |
| throw new $TypeError('iterator must return an object'); |
| } |
| |
| return iterator; |
| }; |