import { EnsureBaseOptions, EnsureIsOptional, EnsureDefault } from '../ensure'; declare function ensureRegExp(value: any, options?: EnsureBaseOptions): RegExp; declare function ensureRegExp(value: any, options?: EnsureBaseOptions & EnsureIsOptional): RegExp | null; declare function ensureRegExp(value: any, options?: EnsureBaseOptions & EnsureIsOptional & EnsureDefault): RegExp; export default ensureRegExp;