source: imaps-frontend/node_modules/es-abstract/2024/IteratorNext.js@ d565449

'use strict';

var $TypeError = require('es-errors/type');

var Call = require('./Call');
var Type = require('./Type');

var isIteratorRecord = require('../helpers/records/iterator-record');

// https://262.ecma-international.org/14.0/#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 (Type(result) !== 'Object') {
                throw new $TypeError('iterator next must return an object'); // step 3
        }
        return result; // step 4
};