export namespace types {
    export function string(instance: any): boolean;
    export function number(instance: any): boolean;
    export function integer(instance: any): boolean;
    export function boolean(instance: any): boolean;
    export function array(instance: any): boolean;
    export function _null(instance: any): boolean;
    export { _null as null };
    export function date(instance: any): boolean;
    export function any(): boolean;
    export function object(instance: any): any;
}
export const FORMAT_REGEXPS: {
    'date-time': RegExp;
    date: RegExp;
    time: RegExp;
    email: RegExp;
    'ip-address': RegExp;
    ipv6: RegExp;
    uri: RegExp;
    color: RegExp;
    hostname: RegExp;
    'host-name': RegExp;
    alpha: RegExp;
    alphanumeric: RegExp;
    'utc-millisec': (input: any) => boolean;
    regex(input: any): boolean;
    style: RegExp;
    phone: RegExp;
};
export function isFormat(input: any, format: any): any;
declare const _default: {};
export default _default;