/**
 * A custom error type for decoding, which stores the path at which a decode operation
 * may have failed.
 */
export declare class DecodeError extends Error {
    private baseMessage;
    path?: string[] | undefined;
    constructor(baseMessage: string, path?: string[] | undefined);
    /**
     *
     * @param path the link in the path at which this decode operation failed
     * @returns a new {@linkcode DecodeError} which
     */
    extend(path: string | number): DecodeError;
    /**
     *
     * @param expected name of the expected type for the decoder
     * @param actual value which failed to decode
     * @returns a {@linkcode DecodeError} indicating a failure to decode due to mismatched types
     */
    static forType: (expected: string, actual: unknown) => DecodeError;
}