import type { Option } from './option.js';
type UnwrapOr = {
    <Opt extends Option.Any, T extends Option.Type<Opt>>(defaultValue: T): (option: Opt) => Option.Type<Opt>;
    <Opt extends Option.Any, T extends Option.Type<Opt>>(defaultValue: T, option: Opt): Option.Type<Opt>;
};
/**
 * Extract value from a `Some` or use a fallback value if a `None`
 *
 * @tags option, unwrap, transform, transform-option, recover, errors, left-biased
 * @see https://doc.rust-lang.org/core/option/enum.Option.html#method.unwrap_or
 */
export declare const unwrapOr: UnwrapOr;
export {};