import { Guard } from './global';
export declare const isString: (x: unknown) => x is string;
export declare const isNumber: (x: unknown) => x is number;
export declare const isBoolean: (x: unknown) => x is boolean;
export declare const isNull: (x: unknown) => x is null;
export declare const isObject: (x: unknown) => x is object;
export declare const isEnum: <T>(enumObject: T) => (token: unknown) => token is T[keyof T];
export declare const isArray: <T>(elemGuard: Guard<T>) => (x: unknown) => x is T[];