49 lines
1.8 KiB
JavaScript
49 lines
1.8 KiB
JavaScript
'use strict';
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var GetIntrinsic = require('get-intrinsic');
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var $TypeError = GetIntrinsic('%TypeError%');
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var GeneratorStart = require('./GeneratorStart');
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var IsArray = require('es-abstract/2023/IsArray');
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var IsCallable = require('es-abstract/2023/IsCallable');
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var OrdinaryObjectCreate = require('es-abstract/2023/OrdinaryObjectCreate');
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var Type = require('es-abstract/2023/Type');
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var every = require('es-abstract/helpers/every');
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var SLOT = require('internal-slot');
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var safeConcat = require('safe-array-concat');
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var isString = function isString(slot) {
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return Type(slot) === 'String';
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};
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module.exports = function CreateIteratorFromClosure(closure, generatorBrand, proto) {
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if (!IsCallable(closure)) {
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throw new $TypeError('`closure` must be a function');
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}
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if (Type(generatorBrand) !== 'String') {
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throw new $TypeError('`generatorBrand` must be a string');
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}
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var extraSlots = arguments.length > 3 ? arguments[3] : [];
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if (arguments.length > 3) {
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if (!IsArray(extraSlots) || !every(extraSlots, isString)) {
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throw new $TypeError('`extraSlots` must be a List of String internal slot names');
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}
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}
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var internalSlotsList = safeConcat(extraSlots, ['[[GeneratorContext]]', '[[GeneratorBrand]]', '[[GeneratorState]]']); // step 3
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var generator = OrdinaryObjectCreate(proto, internalSlotsList); // steps 4, 6
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SLOT.set(generator, '[[GeneratorBrand]]', generatorBrand); // step 5
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SLOT.assert(closure, '[[Sentinel]]'); // our userland slot
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SLOT.set(generator, '[[Sentinel]]', SLOT.get(closure, '[[Sentinel]]')); // our userland slot
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SLOT.assert(closure, '[[CloseIfAbrupt]]'); // our second userland slot
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SLOT.set(generator, '[[CloseIfAbrupt]]', SLOT.get(closure, '[[CloseIfAbrupt]]')); // our second userland slot
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GeneratorStart(generator, closure); // step 13
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return generator; // step 15
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};
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