Hello I have an interface like the following. For some reason, if I try to pass a method reference l...

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[Justin Breitfeller]

Hello I have an interface like the following. For some reason, if I try to pass a method reference like MyJavaClass::hasData as an IsStateRunningCheck argument I get the following error. Found KFunction1 and not my interface. Is this an instance of SAM conversion not working properly or is there something I can do to make this possible.

@FunctionalInterface
protected interface IsStateRunningCheck<T> {
    boolean isStateRunning(T state);
}

For instance:

fun myFooMethod(stateCheck: IsStateRunnningCheck<Int>) { ... }

fun test() {
   myFooMethod(MyJavaClass::hasData) // fails to compile
   myFooMyethod( { it.hasData() }) // works fine
}

// I don't think it matters if this is java or not
class MyJavaClass<Int> { 
  boolean hasData(int x) { return true; }
}

[E.Kisaragi]

SAM is 1.4 or later IIRC

[Justin Breitfeller]

Gotcha thank you. I thought it had something but maybe not.

[Justin Breitfeller]

Actually, looking at it again, we have a Java interface and from what I understand Kotlin 1.4 is only adding SAM conversion for Kotlin interfaces. How I read it is 1.3 should already support Java SAM conversion