Kokorone/packages/shared/src/result.ts

export type Result<T, E = string> = { ok: true; value: T } | { ok: false; error: E };

export function ok<T>(value: T): Result<T, never> {
  return { ok: true, value };
}

export function err<E>(error: E): Result<never, E> {
  return { ok: false, error };
}

export function isOk<T, E>(result: Result<T, E>): result is { ok: true; value: T } {
  return result.ok;
}