this seems weird to me - i have a kotlin class that implements an interface by a delegate (using the...

# getting-started

[gjesse]

this seems weird to me - i have a kotlin class that implements an interface by a delegate (using the by keyword). the interface is defined in java and has some default methods. my class does not override those methods. i was expecting them to be forwarded to the delegate, but instead the default version is used. do i have to explicitly override all default methods in order to forward them to the delegate?

[diesieben07]

I think this was fixed in 1.4 wiht the new IR (https://blog.jetbrains.com/kotlin/2020/07/kotlin-1-4-m3-generating-default-methods-in-interfaces/, see "Fixing an issue with delegates" section)

[gjesse]

that doesn’t quite seem to be it - i tried recompiling with -Xjvm-default=all and it’d didn’t make a difference. also this is a java interface, so i’m not sure it’s the same issue

[diesieben07]

Hm, maybe they did not add it for Java interfaces, which seems like a bug to me.

[diesieben07]

Are you using the new IR?

[diesieben07]

Or is that the default already? 🤔

[gjesse]

IR?

[diesieben07]

https://kotlinlang.org/docs/reference/whatsnew14.html#new-jvm-ir-backend

[gjesse]

thanks.. i’ve been out of kotlin for a bit 🙂

[diesieben07]

I think the new default handling is a feature of the new IR

[gjesse]

i am not

[diesieben07]

That would probably explain why it has no effect

[gjesse]

eh.. either i can’t figure out the right incantation with maven or it’s not the issue. oh well thanks for your help