kotlin bug?

# announcements

[camkadev]

kotlin bug?

[Burkhard]

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

[Egor Trutenko]

That's not an issue. those should've been smartcasted to non-nullable

[camkadev]

if i use this hint is the same, this is just workaround

[Egor Trutenko]

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.

[camkadev]

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

[Egor Trutenko]

Instead of this::class.java.name use GeneratedMessage::class.java.name

[nestserau]

Just use !! as suggested by the IDE.

[nestserau]

Apparently it cannot be smartcasted, which is a bummer, but then it’s safe to use !!.

[nestserau]

What happens BTW if you just write: val those = this?

[Egor Trutenko]

@nestserau where would you put !!?

[udalov]

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

[nestserau]

@Egor Trutenko those!!::class.java.name

[nestserau]

But from the link above I see that it won’t help either.