import type { Result } from '../result/result.js';
import type { Option } from './option.js';
type OkOr = {
    <Opt extends Option.Any, E>(defaultErr: E): (option: Opt) => Result<Option.Type<Opt>, E>;
    <Opt extends Option.Any, E>(defaultErr: E, option: Opt): Result<Option.Type<Opt>, E>;
};
/**
 * Transforms `Some(v)` to `Ok(v)`, and `None` to a value of `Err` using the provided default error value.
 *
 * @tags option, transform, transform-option, right-biased, unwrap, result
 * @see https://doc.rust-lang.org/std/option/enum.Option.html#method.ok_or
 */
export declare const okOr: OkOr;
export {};