| 1 | import { AsyncSink } from './asyncsink';
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| 2 | import { memoize } from './operators/memoize';
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| 3 | /**
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| 4 | * Converts a Node.js style error first callback to an async-iterable sequence.
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| 5 | *
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| 6 | * @export
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| 7 | * @template TSource The type of the returned value from the callback.
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| 8 | * @param {Function} func The Node.js error first callback to convert to an async-iterable.
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| 9 | * @returns {(...args: any[]) => AsyncIterableX<TSource>} A function, when invoked, contains the result of the callback as an async-iterable.
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| 10 | */
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| 11 | export function asyncifyErrback(func) {
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| 12 | return function (...args) {
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| 13 | const sink = new AsyncSink();
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| 14 | const handler = function (err, ...innerArgs) {
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| 15 | if (err) {
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| 16 | sink.error(err);
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| 17 | sink.end();
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| 18 | }
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| 19 | else {
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| 20 | sink.write(innerArgs.length === 1 ? innerArgs[0] : innerArgs);
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| 21 | sink.end();
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| 22 | }
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| 23 | };
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| 24 | try {
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| 25 | func(...args.concat(handler));
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| 26 | }
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| 27 | catch (e) {
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| 28 | sink.error(e);
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| 29 | sink.end();
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| 30 | }
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| 31 | const yielder = async function* () {
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| 32 | for (let next; !(next = await sink.next()).done;) {
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| 33 | yield next.value;
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| 34 | }
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| 35 | };
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| 36 | return memoize()(yielder());
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| 37 | };
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| 38 | }
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| 39 |
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| 40 | //# sourceMappingURL=asyncifyerrback.mjs.map
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