'use strict';
var $TypeError = require('es-errors/type');
var isObject = require('es-object-atoms/isObject');
var Call = require('./Call');
var isIteratorRecord = require('../helpers/records/iterator-record');
// https://262.ecma-international.org/15.0/#sec-iteratornext
module.exports = function IteratorNext(iteratorRecord) {
if (!isIteratorRecord(iteratorRecord)) {
throw new $TypeError('Assertion failed: `iteratorRecord` must be an Iterator Record'); // step 1
}
var result;
if (arguments.length < 2) { // step 1
result = Call(iteratorRecord['[[NextMethod]]'], iteratorRecord['[[Iterator]]']); // step 1.a
} else { // step 2
result = Call(iteratorRecord['[[NextMethod]]'], iteratorRecord['[[Iterator]]'], [arguments[1]]); // step 2.a
}
if (!isObject(result)) {
throw new $TypeError('iterator next must return an object'); // step 3
}
return result; // step 4
};