/**
 * Represents the result of a race between a promise and a timeout.
 */
export type RaceWithTimeoutResult<T> = {
    result: T;
    timeout: false;
} | {
    result: undefined;
    timeout: true;
};
/**
 * Executes a given promise and races it against a timeout. If the promise resolves before the timeout,
 * the result of the promise is returned. If the timeout occurs first, a timeout result is returned.
 * @template T - The type of the result that the promise resolves to.
 * @param promise - A function that returns a promise or a value of type T.
 * @param timeout - The timeout duration in milliseconds.
 * @returns A promise that resolves to an object containing either the result of the promise or a timeout flag.
 * @example
 * ```ts
 * const { result, timeout } = await raceWithTimeout(() => fetchData(), 5000);
 * if (timeout) {
 *   console.log('Operation timed out');
 * } else {
 *   console.log('Operation succeeded with result:', result);
 * }
 * ```
 */
export declare function raceWithTimeout<T>(promise: () => Promise<T> | T, timeout: number): Promise<RaceWithTimeoutResult<T>>;