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Yeah this one also makes complete sense, I tried implementing a more verbose version of the same exact method like this: def testImpl[T, U >: T : ClassTag, L <: T : ClassTag]: T = { println(classTag[L]); println(classTag[U]; null.asInstanceOf[T] }, and then delegating the implementation is test[T] method to testImpl[T, T, T]. And what I saw is that both upper bound and lower bounds of T are Nothing, so it makes sense that T is also Nothing!

AminMal
– AminMal

2022-12-23 17:09:46 +00:00
Commented Dec 23, 2022 at 17:09
I guess at least in Scala2, this problem cannot be solved, it should be handled with alternatives such as Either or something. @KamilKloch

AminMal
– AminMal

2022-12-23 17:12:24 +00:00
Commented Dec 23, 2022 at 17:12
@AminMal Well, I solved it eventually but with macros.

Dmytro Mitin
– Dmytro Mitin

2022-12-23 20:21:14 +00:00
Commented Dec 23, 2022 at 20:21

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