import { type InitializedRootObservable } from '../types/index.mjs';
/**
 * Creates an Observable that holds a single static value and immediately
 * completes. Useful inside `switchMap` to emit a fallback value when no
 * asynchronous work is needed.
 *
 * @template A - The type of the value
 * @param value - The value to emit
 * @returns An initialized Observable that holds the value and is already completed
 *
 * @example
 * ```ts
 * const greeting$ = just('hello');
 *
 * const valueHistory: string[] = [];
 *
 * greeting$.subscribe(
 *   (value) => {
 *     valueHistory.push(value);
 *   },
 *   () => {
 *     // onComplete — called immediately since just() completes right away
 *   },
 * );
 *
 * assert.deepStrictEqual(valueHistory, ['hello']);
 *
 * assert.strictEqual(greeting$.isCompleted, true);
 * ```
 */
export declare const just: <const A>(value: A) => InitializedRootObservable<A>;
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