ix/asynciterable/create.mjs

The Interactive Extensions for JavaScript

import { __asyncGenerator, __await } from "tslib";
import { AsyncIterableX } from './asynciterablex.mjs';
import { throwIfAborted } from '../aborterror.mjs';
class AnonymousAsyncIterable extends AsyncIterableX {
    constructor(fn) {
        super();
        this._fn = fn;
    }
    [Symbol.asyncIterator](signal) {
        return __asyncGenerator(this, arguments, function* _a() {
            throwIfAborted(signal);
            const it = yield __await(this._fn(signal));
            let next;
            while (!(next = yield __await(it.next())).done) {
                yield yield __await(next.value);
            }
        });
    }
}
/**
 * Creates a new iterable using the specified function implementing the members of AsyncIterable
 *
 * @template T The type of the elements returned by the enumerable sequence.
 * @param {((signal?: AbortSignal) => AsyncIterator<T> | Promise<AsyncIterator<T>>)} fn The function that creates the [Symbol.asyncIterator]() method
 * @returns {AsyncIterableX<T>} A new async-iterable instance.
 */
export function create(fn) {
    return new AnonymousAsyncIterable(fn);
}

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