import { Exp, ExpMeta } from "../../exp";
import { Core } from "../../core";
import { Ctx } from "../../ctx";
import { Value } from "../../value";
export declare class Cons extends Exp {
    meta: ExpMeta;
    car: Exp;
    cdr: Exp;
    constructor(car: Exp, cdr: Exp, meta: ExpMeta);
    free_names(bound_names: Set<string>): Set<string>;
    subst(name: string, exp: Exp): Exp;
    check(ctx: Ctx, t: Value): Core;
    repr(): string;
}