import type { Option } from './option.js';
type Expect = {
    <Opt extends Option.Any>(msg: string): (option: Opt) => Opt extends Option<infer T> ? T : never;
    <Opt extends Option.Any>(msg: string, option: Opt): Opt extends Option<infer T> ? T : never;
};
/**
 * Unwraps an `Option` value, returning the underlying value if it is `Some`. If the value is `None`, this function
 * panics with the provided error message.
 *
 * @tags option, unwrap, unsafe, right-biased
 */
export declare const expect: Expect;
export {};