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