/**
 * Check if a value is a valid date string or Date object
 * @public
 */
export declare function isDateValue(value: unknown): boolean;
/**
 * Compare two numbers
 * @returns negative if a < b, positive if a > b, 0 if equal
 * @public
 */
export declare function compareNumbers(a: number, b: number): number;
/**
 * Compare two dates (Date objects or date strings)
 * @returns negative if a < b, positive if a > b, 0 if equal
 * @public
 */
export declare function compareDates(a: string | Date, b: string | Date): number;
/**
 * Compare two strings with locale support
 * Handles numeric strings (e.g., "100", "$1,234.56")
 * @returns negative if a < b, positive if a > b, 0 if equal
 * @public
 */
export declare function compareStrings(a: string, b: string): number;
/**
 * Compare two values with smart type detection
 * Handles: null/undefined, number, date, string (including currency/numeric strings)
 * @returns negative if a < b, positive if a > b, 0 if equal
 */
export declare function compareAllValues<T>(a: T, b: T): number;