export type OkResult<T> = {
    readonly ok: true;
    readonly value: T;
};
export type ErrResult<E extends Error> = {
    readonly ok: false;
    readonly error: E;
};
export type Result<T, E extends Error = Error> = OkResult<T> | ErrResult<E>;
export declare const Ok: <T>(value: T) => OkResult<T>;
export declare const Err: <E extends Error>(error: E) => ErrResult<E>;
export declare const isOk: <T, E extends Error>(result: Result<T, E>) => result is OkResult<T>;
export declare const isErr: <T, E extends Error>(result: Result<T, E>) => result is ErrResult<E>;
export declare const mapResult: <T, U, E extends Error>(result: Result<T, E>, fn: (value: T) => U) => Result<U, E>;
export declare const flatMapResult: <T, U, E extends Error>(result: Result<T, E>, fn: (value: T) => Result<U, E>) => Result<U, E>;
export declare const unwrap: <T, E extends Error>(result: Result<T, E>) => T;
export declare const unwrapOr: <T, E extends Error>(result: Result<T, E>, defaultValue: T) => T;
export declare const trySync: <T>(fn: () => T) => Result<T, Error>;
export declare const tryAsync: <T>(fn: () => Promise<T>) => Promise<Result<T, Error>>;
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