/**
 * Type check
 */
type Primitive = string | number | boolean | null | undefined | symbol | bigint;
type JSONValue = string | number | boolean | null | JSONObject | JSONArray;
interface JSONObject {
    [key: string]: JSONValue;
}
interface JSONArray extends Array<JSONValue> {
}
export declare const isArguments: (obj: any) => obj is IArguments;
export declare const isSymbol: (obj: any) => obj is symbol;
export declare const isSet: (obj: any) => obj is Set<any>;
export declare const isWeakSet: (obj: any) => obj is WeakSet<any>;
export declare const isMap: (obj: any) => obj is Map<any, any>;
export declare const isWeakMap: (obj: any) => obj is WeakMap<any, any>;
export declare function isArray(obj: any): obj is Array<any>;
export declare function isDate(obj: any): obj is Date;
export declare function isRegExp(obj: any): obj is RegExp;
export declare function isError(obj: any): obj is Error;
export declare function isSyntaxError(obj: any): obj is SyntaxError;
export declare function isTypeError(obj: any): obj is TypeError;
export declare function isRangeError(obj: any): obj is RangeError;
export declare function isObject(obj: any): obj is Record<string, any>;
export declare function isFunction(obj: any): obj is Function;
export declare function isNull(obj: any): obj is null;
export declare function isUndefined(obj: any): obj is undefined;
export declare function isNill(obj: any): obj is null | undefined;
export declare function isBoolean(obj: any): obj is boolean;
export declare function isString(obj: any): obj is string;
export declare function isChar(obj: any): obj is string;
export declare function isNumber(obj: any, warn?: boolean): obj is number;
export declare function isNaN(obj: any): boolean;
export declare function isRealNumber(obj: any): obj is number;
export declare function isPrimitive(obj: any): obj is Primitive;
export declare function isSpreadable(obj: any): obj is Array<any> | Record<string, any>;
export declare function isJSON(obj: any): obj is JSONValue;
export interface ObjectExtensions {
    isEmpty: (obj: any, ownCheck?: boolean) => boolean;
    isEmptyOwn: (obj: any) => boolean;
    isFlat: (obj: any) => boolean;
}
export interface NumberExtensions {
    decimal: (obj: any) => boolean;
    integer: (obj: any) => boolean;
    odd: (obj: any) => boolean;
    even: (obj: any) => boolean;
}
export declare function getTypeOf(obj: any): string;
export {};