export interface Err<A, E> {
    readonly _tag: 'Err';
    readonly ok?: A;
    readonly err: E;
}
export interface Ok<A, E> {
    readonly _tag: 'Ok';
    readonly ok: A;
    readonly err?: E;
}
export type Result<A, E> = Ok<A, E> | Err<A, E>;
export type OkOf<R> = R extends Result<infer A, unknown> ? A : never;
export type ErrOf<R> = R extends Result<unknown, infer E> ? E : never;
export type ResultOf<R> = R extends Ok<infer A, infer E> ? Result<A, E> : R extends Err<infer A, infer E> ? Result<A, E> : R extends Result<infer A, infer E> ? Result<A, E> : never;