export declare const regexToString: (r: string | RegExp) => string;
export declare const stringToRegex: (r: string | RegExp, flags?: string) => RegExp;
export interface MergeRexesOptions {
    flags?: string;
    join?: string;
    groupify?: boolean;
    groupAll?: boolean;
}
export declare const mergeRegexes: (regexes: (RegExp | string)[], options?: MergeRexesOptions) => RegExp;
export declare const EMAIL_REGEXP: RegExp;
export declare const EMAIL_REGEXP_WITH_BRACKETS: RegExp;