/**
 * A deferred promise with externally accessible resolve and reject
 */
export interface Deferred<T> {
    promise: Promise<T>;
    resolve: (value: T | PromiseLike<T>) => void;
    reject: (reason?: unknown) => void;
}
/**
 * Creates a deferred promise whose resolve and reject can be
 * called externally
 * @returns {Deferred<T>} An object with promise, resolve, and reject
 * @example
 * const d = defer<number>();
 * d.resolve(42);
 * const value = await d.promise;
 */
export declare const defer: <T>() => Deferred<T>;