import { Option } from './option';
/**
 * Return `left` if it contains a value,
 * otherwise return `right`
 * @param left Option to match against
 * @param right Option to return when `left` does not contain a value
 * @returns Either `left` or `right`
 */
export declare const or: <Value = never>(left: Option<Value>, right: Option<Value>) => Option<Value>;
/**
 * Return `left` if it contains a value,
 * otherwise call `right` and return the result
 * @param left Option to match against
 * @param right Function to call when `left` does not contain a value
 * @returns Either `left` or return value of `right`
 */
export declare const orElse: <Value = never>(left: Option<Value>, right: () => Option<Value>) => Option<Value>;