declare class Result<OkType, ErrType> {
    private whether_ok;
    private value;
    static createOk<ValueType, ErrType = never>(value: ValueType): Result<ValueType, ErrType>;
    static createErr<ValueType, OkType = never>(value: ValueType): Result<OkType, ValueType>;
    static fromOk<ValueType>(result: Result<ValueType, unknown>): Result<ValueType, never>;
    static fromErr<ValueType>(result: Result<unknown, ValueType>): Result<never, ValueType>;
    isOk(): this is Result<OkType, never>;
    isErr(): this is Result<never, ErrType>;
    unwrapOk(): OkType;
    unwrapErr(): ErrType;
    constructor(whether_ok: true, value: OkType);
    constructor(whether_ok: false, value: ErrType);
}

export { Result };