export type Err<T = any> = {
  kind: 'Err'
  value: T
  isErr: true
  isOk: false
}

export type Ok<T = any> = {
  kind: 'Ok'
  value: T
  isErr: false
  isOk: true
}

export type Result<T = any, E = string> = Err<E> | Ok<T>

export const Err = <E = string>(value: E): Err<E> => {
  const err: Err = {
    kind: 'Err',
    value,
    isErr: true,
    isOk: false,
  }
  return err
}

export const Ok = <T, E = string>(value: T): Result<T, E> => {
  const ok: Ok<T> = {
    kind: 'Ok',
    value,
    isErr: false,
    isOk: true,
  }
  return ok
}