import { i as Pipe } from '../errors-B5taetnA.js';
import '@standard-schema/spec';
import '../utils/types.js';

declare const isString: (err?: string) => Pipe<string, string>;
declare const isNumber: (err?: string) => Pipe<number, number>;
declare const isBoolean: (err?: string) => Pipe<boolean, boolean>;
declare const isNull: (err?: string) => Pipe<null, null>;
declare const isUndefined: (err?: string) => Pipe<undefined, undefined>;
declare const isAny: <T>() => Pipe<T, T>;
declare const isInstanceOf: <T>(classDef: abstract new (...args: any[]) => T, err?: string) => Pipe<T, T>;

export { isAny as any, isBoolean as boolean, isInstanceOf as instanceOf, isNull as null, isNumber as number, isString as string, isUndefined as undefined };