export interface Result<T, E = Error> {
    /**
     * Returns `true` if the {@link Result} is {@link Ok}, or `false` otherwise.
     */
    isOk(): this is Ok<T, E>;
    /**
     * Returns `true` if the {@link Result} is {@link Err}, or `false` otherwise.
     */
    isErr(): this is Err<T, E>;
    /**
     * Returns `T` if the {@link Result} is {@link Ok}, or throws `E` otherwise.
     */
    unwrap(): T;
    /**
     * Returns `T` if the {@link Result} is {@link Ok}, or `undefined` otherwise.
     */
    ok(): T | undefined;
    /**
     * Returns `E` if the {@link Result} is {@link Err}, or `undefined` otherwise.
     */
    err(): E | undefined;
}
export interface Ok<T, E = Error> extends Result<T, E> {
    isOk(): this is Ok<T, E>;
    isErr(): this is Err<T, E>;
    unwrap(): T;
    ok(): T;
    err(): undefined;
}
export interface Err<T, E = Error> extends Result<T, E> {
    isOk(): this is Ok<T, E>;
    isErr(): this is Err<T, E>;
    unwrap(): never;
    ok(): undefined;
    err(): E;
}
export declare function Ok<T, E = Error>(value: T): Result<T, E>;
export declare function Err<T, E = Error>(error: E): Result<T, E>;