import type { Maybe } from "@vangware/types";
import type { CronLastValue } from "../types/CronLastValue.js";
/**
 * Parses a string into a `CronLastValue`.
 *
 * @category Parsers
 * @example
 * ```typescript
 * parseStringLastValue("5L"); // { last: 5 }
 * parseStringLastValue("INVALID"); // undefined
 * ```
 * @param source string to be parsed.
 * @returns A `CronLastValue` or `undefined` if invalid.
 */
export declare const parseStringLastValue: (
	source: string,
) => Maybe<CronLastValue>;