import { TReferenceProps } from '../../..';
import { IStringProps, TStringValidatorResult } from '../_types';
export interface IIsOctalProps {
}
/**
 * Check if the string is a valid octal number.
 */
export declare const isOctal: (props?: TReferenceProps<IIsOctalProps> & IStringProps) => TStringValidatorResult;