source: frontend/node_modules/es-iterator-helpers/Iterator.from/implementation.js

'use strict';

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

var GetIteratorFlattenable = require('es-abstract/2025/GetIteratorFlattenable');
var OrdinaryHasInstance = require('es-abstract/2025/OrdinaryHasInstance');
var OrdinaryObjectCreate = require('es-abstract/2025/OrdinaryObjectCreate');

var $Iterator = require('../Iterator/polyfill')();
var $WrapForValidIteratorPrototype = require('../WrapForValidIteratorPrototype');

var SLOT = require('internal-slot');

module.exports = function from(O) {
        if (this instanceof from) {
                throw new $TypeError('`Iterator.from` is not a constructor');
        }

        var iteratorRecord = GetIteratorFlattenable(O, 'ITERATE-STRING-PRIMITIVES'); // step 1

        var hasInstance = OrdinaryHasInstance($Iterator, iteratorRecord['[[Iterator]]']); // step 2

        if (hasInstance) { // step 3
                return iteratorRecord['[[Iterator]]']; // step 3.a
        }

        var wrapper = OrdinaryObjectCreate($WrapForValidIteratorPrototype); // , ['[[Iterated]]']); // step 4

        SLOT.set(wrapper, '[[Iterated]]', iteratorRecord); // step 5

        return wrapper; // step 6
};