import { Expr, Literal } from '../node/index.mjs';
import { Token } from '../keywords/index.mjs';

declare const BaseDataTag: {
    OBJECT: symbol;
    ARRAY: symbol;
    RANGE: symbol;
    FN: symbol;
    FN_TASK: symbol;
    FN_LAMBDA: symbol;
};
declare function isToken(expr: Expr): boolean;
declare function isNilLiteral(expr: Literal): boolean;
declare function isNil(input: any): boolean;
declare function isBuilInObject(expr: Token | Expr): boolean;
declare function isFunction(fn: any): boolean;
declare function isInSideModule(_: Record<string, any>): boolean;
declare function isClass(fn: Object): boolean;
declare function isPromise(value: any): boolean;

export { BaseDataTag, isBuilInObject, isClass, isFunction, isInSideModule, isNil, isNilLiteral, isPromise, isToken };