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node_modules/es-abstract/2017/GetIterator.js
| 35 lines
| 874 B
| application/javascript
| JavascriptLexer
|
r789 | 'use strict'; | |||
var GetIntrinsic = require('../GetIntrinsic'); | ||||
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; | ||||
}; | ||||