import { Exp, ExpMeta } from "../../exp";
import { Core } from "../../core";
import { Ctx } from "../../ctx";
import { Value } from "../../value";
export declare class Either extends Exp {
    meta: ExpMeta;
    left_t: Exp;
    right_t: Exp;
    constructor(left_t: Exp, right_t: 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;
}