'use strict'; var $RangeError = require('es-errors/range'); var $TypeError = require('es-errors/type'); var CompletionRecord = require('es-abstract/2023/CompletionRecord'); var CreateIteratorFromClosure = require('../aos/CreateIteratorFromClosure'); var GetIteratorDirect = require('../aos/GetIteratorDirect'); var IteratorClose = require('../aos/IteratorClose'); var IteratorStepValue = require('../aos/IteratorStepValue'); var NormalCompletion = require('es-abstract/2023/NormalCompletion'); var ToIntegerOrInfinity = require('es-abstract/2023/ToIntegerOrInfinity'); var ToNumber = require('es-abstract/2023/ToNumber'); var Type = require('es-abstract/2023/Type'); var iterHelperProto = require('../IteratorHelperPrototype'); var isNaN = require('es-abstract/helpers/isNaN'); var SLOT = require('internal-slot'); module.exports = function take(limit) { if (this instanceof take) { throw new $TypeError('`take` is not a constructor'); } var O = this; // step 1 if (Type(O) !== 'Object') { throw new $TypeError('`this` value must be an Object'); // step 2 } var numLimit = ToNumber(limit); // step 2 if (isNaN(numLimit)) { throw new $RangeError('`limit` must be a non-NaN number'); // step 3 } var iterated = GetIteratorDirect(O); // step 4 var integerLimit = ToIntegerOrInfinity(numLimit); // step 7 if (integerLimit < 0) { throw new $RangeError('`limit` must be a >= 0'); // step 8 } var closeIfAbrupt = function (abruptCompletion) { if (!(abruptCompletion instanceof CompletionRecord)) { throw new $TypeError('`abruptCompletion` must be a Completion Record'); } IteratorClose( iterated, abruptCompletion ); }; var sentinel = {}; var remaining = integerLimit; // step 9.a var closure = function () { // step 9 // while (true) { // step 9.b if (remaining === 0) { // step 9.b.i return IteratorClose( // step 9.b.i.1 iterated, NormalCompletion(sentinel) ); } if (remaining !== Infinity) { // step 9.b.ii remaining -= 1; // step 9.b.ii.1 } var value = IteratorStepValue(iterated); // step 6.b.i if (iterated['[[Done]]']) { return sentinel; // step 6.b.ii } return value; // step 9.b.iv // } }; SLOT.set(closure, '[[Sentinel]]', sentinel); // for the userland implementation SLOT.set(closure, '[[CloseIfAbrupt]]', closeIfAbrupt); // for the userland implementation var result = CreateIteratorFromClosure(closure, 'Iterator Helper', iterHelperProto, ['[[UnderlyingIterator]]']); // step 7 SLOT.set(result, '[[UnderlyingIterator]]', iterated); // step 8 return result; // step 9 };