import { Options, ParseOptions } from "./types.js";
import { Schedule } from "./schedule.js";
export { Schedule } from "./schedule.js";
export { Unit, Options } from "./types.js";
/**
 * Parses a cron string
 *
 * @param str The string to parse
 * @param options Parse options
 * @return The cron schedule as an array
 */
export declare function stringToArray(str: string, options?: Partial<ParseOptions>): number[][];
/**
 * Parses a 2-dimentional array of integers and serializes it to a string
 *
 * @param arr The array to parse
 * @return The cron schedule as a string
 */
export declare function arrayToString(arr: number[][], options?: Partial<Options>): string;
/**
 * Returns the schedule iterator
 *
 * @param arr The cron schedule as an array
 * @param now An optional reference `Date`
 * @param timezone An optional timezone string
 * @return A schedule iterator
 */
export declare function getSchedule(arr: number[][], now?: Date | string, timezone?: string): Schedule;
/**
 * Returns a readonly array of cron units.
 * These specify the minimum and maximum values
 * for each part of a cron expression, as well as
 * the unit name and any alternative respresentations
 * for the values of that unit.
 *
 * @returns The `units` array
 */
export declare function getUnits(): readonly import("./types.js").Unit[];