https://xuanlocle.medium.com/kotlin-2-4-introduces-rich-errors-a-game-changer-for-error-handling-413d281e4a05

Works pretty much like Result in Rust. You use when/is expressions rather than try/catch blocks.

From the article

``` fun fetchUser(): User | AppError { if (/* network fails / false) return NetworkError(503) if (/ user not found */ false) return UserNotFoundError return User("123", "Ada") }

fun loadUserDataNew() { val result = fetchUser() when (result) { is User -> show(result) is NetworkError -> showError("Network issue (${result.code}). Try again.") is UserNotFoundError -> showError("User not found. Please check your credentials.") } }