asyncerator/src/operator/after.ts

Provide supporting types for AsyncIterable/AsyncIterableIterators, promisified stream.pipeline implementation, and Array-like utility operators, sources and sinks.

// operator/after.ts

/*
 * Copyright (c) 2021-2024 Check Digit, LLC
 *
 * This code is licensed under the MIT license (see LICENSE.txt for details).
 */

import type { Asyncerator } from '../asyncerator';

import type { Operator } from './index';

/**
 * Emit a value after stream completes.
 * @param value
 */
export default function <Input>(value: Input): Operator<Input, Input> {
  return async function* (iterator: Asyncerator<Input>) {
    yield* iterator;
    yield value;
  };
}