ix/asynciterable/never.mjs

The Interactive Extensions for JavaScript

import { __asyncGenerator, __await } from "tslib";
import { AsyncIterableX } from './asynciterablex.mjs';
import { throwIfAborted, AbortError } from '../aborterror.mjs';
/** @ignore */
export class NeverAsyncIterable extends AsyncIterableX {
    constructor() {
        super();
    }
    [Symbol.asyncIterator](signal) {
        return __asyncGenerator(this, arguments, function* _a() {
            throwIfAborted(signal);
            yield __await(new Promise((_, reject) => {
                if (signal) {
                    signal.addEventListener('abort', () => reject(new AbortError()), { once: true });
                }
            }));
        });
    }
}
/**
 * An async-iterable sequence that never returns a value.
 *
 * @returns {AsyncIterableX<never>} An async-iterable sequence that never returns a value.
 */
export function never() {
    return new NeverAsyncIterable();
}

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