type Looper<T> = (index: number) => Promise<T>;
declare class TooManyRetriesError extends Error {
    #private;
    readonly name: string;
    constructor(options?: ErrorOptions);
    static from(cause: unknown): TooManyRetriesError;
}
type Looped<T> = Cancel<T> | Retry<T> | Skip<T>;
declare namespace Looped {
    type Infer<T> = Cancel.Infer<T> | Skip.Infer<T> | Retry.Infer<T>;
    type Inner<T> = Cancel.Inner<T> | Skip.Inner<T> | Retry.Inner<T>;
}
declare class Cancel<T> {
    readonly inner: T;
    constructor(inner: T);
    static new<T>(inner: T): Cancel<T>;
    isCancel(): this is Cancel<T>;
    isRetry(): false;
    isSkip(): false;
}
declare namespace Cancel {
    type Infer<T> = Cancel<Inner<T>>;
    type Inner<T> = T extends Cancel<infer Inner> ? Inner : never;
}
declare class Retry<T> {
    readonly inner: T;
    constructor(inner: T);
    static new<T>(inner: T): Retry<T>;
    isCancel(): false;
    isRetry(): this is Retry<T>;
    isSkip(): false;
}
declare namespace Retry {
    type Infer<T> = Retry<Inner<T>>;
    type Inner<T> = T extends Retry<infer Inner> ? Inner : never;
    function runSync<T>(f: () => T): T;
    function run<T>(f: () => Promise<T>): Promise<T>;
}
declare class Skip<T> {
    readonly inner: T;
    constructor(inner: T);
    static new<T>(inner: T): Skip<T>;
    isCancel(): false;
    isRetry(): false;
    isSkip(): this is Skip<T>;
}
declare namespace Skip {
    type Infer<T> = Skip<Inner<T>>;
    type Inner<T> = T extends Skip<infer Inner> ? Inner : never;
    function runSync<T>(f: () => T): T;
    function run<T>(f: () => Promise<T>): Promise<T>;
}
interface LoopOptions {
    readonly init?: number;
    readonly base?: number;
    readonly max?: number;
}
declare function loopOrThrow<T>(looper: Looper<T>, options?: LoopOptions): Promise<T>;

export { Cancel, type LoopOptions, Looped, type Looper, Retry, Skip, TooManyRetriesError, loopOrThrow };