kotlin bug?

If I remember it right,

someVariable::class.java

is the same as javas

someVariable.getClass()

. So it does not resolve the type during compile time but at runtime depending on the value. Because of that

someVariable

must not be null. If you want to resolve the type statically you could use

GeneratedMessage::class

That's not an issue.

those

should've been smartcasted to non-nullable

if i use

this

hint is the same, this is just workaround

Well, I'm not really sure what is exactly the problem, probably it's for the sake of Java compatibility, because you may accidentally push a null and Kotlin will treat nullable type as a normal type or something. The solution for type resolution is as @Burkhard suggested, resolve the type statically, but it'll bring overheads of reifing type parameter.

looks like i don't understand, what exactly should i do?

Instead of

this::class.java.name

use

GeneratedMessage::class.java.name

Just use

!!

as suggested by the IDE.

@nestserau where would you put

!!

?

This is a known problem: https://youtrack.jetbrains.com/issue/KT-20778

@Egor Trutenko

those!!::class.java.name