import { Option } from './option';
/**
 * Return contained value of a `Some`
 * or throw a `TypeError`
 * @param option Option to unwrap
 * @returns Contained value
 */
export declare const unwrap: <Value = never>(option: Option<Value>) => Value;
/**
 * Unwrap contained value of a `Some`,
 * or throws an error
 * @param option Option to unwrap
 * @param message Error to throw when `option` does not contain a value
 * @returns Contained value
 */
export declare const unwrapOrErr: <Value = never, Message = Error>(option: Option<Value>, message: Message) => Value;
/**
 * Return contained value of a `Some`
 * or default value
 * @param option Option to unwrap
 * @param def Value to return when `option` does not contain a value
 * @returns Either contained value or `def`
 */
export declare const unwrapOr: <Value = never, Default = Value>(option: Option<Value>, def: Default) => Value | Default;
/**
 * Return contained value of a `Some`
 * or call a function
 * @param option Option to unwrap
 * @param def Function to be called when `option` does not contain a value
 * @returns Either contained value or returning value of `none`
 */
export declare const unwrapOrElse: <Value = never, Default = Value>(option: Option<Value>, def: () => Default) => Value | Default;