Both Scala3 and Kotlin allow you to annotate functions with @tailrec which will give you a compiler warning if the compiler can’t optimize. And if you use the x

Both Scala3 and Kotlin allow you to annotate functions with @tailrec which will give you a compiler warning if the compiler can’t optimize. And if you use the xfatal-warn compiler flag the Scala code won’t compile if your function is not tail call.