'use strict';
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var SLOT = require('internal-slot');
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var $SyntaxError = require('es-errors/syntax');
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var $StopIteration = typeof StopIteration === 'object' ? StopIteration : null;
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/** @type {import('.')} */
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module.exports = function getStopIterationIterator(origIterator) {
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if (!$StopIteration) {
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throw new $SyntaxError('this environment lacks StopIteration');
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}
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SLOT.set(origIterator, '[[Done]]', false);
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/** @template T @typedef {T extends Iterator<infer U> ? U : never} IteratorType */
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/** @typedef {IteratorType<ReturnType<typeof getStopIterationIterator>>} T */
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var siIterator = {
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next: /** @type {() => IteratorResult<T>} */ function next() {
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// eslint-disable-next-line no-extra-parens
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var iterator = /** @type {typeof origIterator} */ (SLOT.get(this, '[[Iterator]]'));
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var done = !!SLOT.get(iterator, '[[Done]]');
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try {
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return {
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done: done,
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// eslint-disable-next-line no-extra-parens
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value: done ? void undefined : /** @type {T} */ (iterator.next())
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};
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} catch (e) {
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SLOT.set(iterator, '[[Done]]', true);
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if (e !== $StopIteration) {
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throw e;
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}
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return {
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done: true,
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value: void undefined
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};
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}
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}
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};
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SLOT.set(siIterator, '[[Iterator]]', origIterator);
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// @ts-expect-error TODO FIXME
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return siIterator;
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};
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