In 1.4 there seems to be limitation for functional interfaces - suspend functions are not supported....

# announcements

[Yuri]

In 1.4 there seems to be limitation for functional interfaces - suspend functions are not supported.
Why? Is it final language design decision or temporal limitation of some kind?

fun interface Plugin {
  suspend fun onFinish()
}

‘suspend’ modifier is not allowed on a single abstract member

[dmitriy.novozhilov]

We found critical bug for such fun interfaces shortly before release, so we decide to prohibit them for now and fix in further releases

[Yuri]

Thanks 👌

[Kwabena Berko]

Any updates on this @dmitriy.novozhilov @Yuri?

[Kwabena Berko]

I get the below IDE error but I’m able to compile

[dmitriy.novozhilov]

They are supported since Kotlin 1.5
https://youtrack.jetbrains.com/issue/KT-45836/Broken-support-of-suspend-function-in-SAM-interface-for-JVM-IR

[Kwabena Berko]

Yeah, I don’t get a compilation error. It compiles just fine. It seems to be just an IDE error
Im using Kotlin 1.7.10
Any way to solve this?

[dmitriy.novozhilov]

I can only suggest to update your intellij and Kotlin IDE plugin to latest versions. If it won't help (or you already did this) please report an issue to youtrack

[Kwabena Berko]

Thank you. Just created an issue:
https://youtrack.jetbrains.com/issue/KTIJ-22739/IDE-error-when-using-functional-SAM-interfaces-in-Kotlin-Multiplatform-Projects

[rsktash]

@Suppress("FUN_INTERFACE_WITH_SUSPEND_FUNCTION")