/**
 * Some Alpha Regex helpers.
 * https://github.com/chriso/validator.js/blob/master/src/lib/alpha.js
 */
export declare const alpha: {
    [k: string]: RegExp;
};
export declare const alphaSpaces: {
    [k: string]: RegExp;
};
export declare const alphanumeric: {
    [k: string]: RegExp;
};
export declare const alphaDash: {
    [k: string]: RegExp;
};