import { History } from "./history.js";
import { Program } from "./program.js";
/**
 * Create new REPL instance.
 */
export declare function repl(program: Program): Repl;
export declare class Repl {
    private program;
    private server?;
    private history?;
    private autocompleter;
    private successHandler;
    private errorHandler;
    constructor(program: Program);
    attachHistory(history: History): void;
    /**
     * Start the REPL server. This method may change at any time, not
     * intended for public use.
     *
     * @private
     */
    start(): Promise<void>;
    stop(): void;
    /**
     * Emulates promise.then, but saves the callback instead to be executed on
     * each command which resolves.
     */
    then(cb: (value?: unknown) => void): this;
    /**
     * Emulates promise.catch, but saves the callback instead to be executed on
     * each command which rejects.
     */
    catch(cb: (reason?: any) => void): this;
    /**
     * Invokes the autocompleter and passes results to the REPL server.
     */
    private completer;
    /**
     * Uses the bandersnatch program to run commands received by the REPL server.
     */
    private eval;
}