export declare type JSONGuardResult<To> = {
    error: false;
    value: To;
    force: () => To;
} | {
    error: true;
    message: string;
    force: () => never;
};
export declare type JSONGuard<To, From = unknown> = (x: From) => JSONGuardResult<To>;
export declare const success: <To>(value: To) => {
    error: false;
    value: To;
    force: () => To;
};
export declare const failure: (message: string) => {
    error: true;
    message: string;
    force: () => never;
};