yeah, I've removed it, it says construction is not yet supported in inline functions

It is supported starting from 1.2-M1, see this post https://blog.jetbrains.com/kotlin/2017/06/early-access-program-for-kotlin-1-2-has-been-started/

Awesome stuff! That would obviously allow me to get rid of the

noinline

hacks. Would that also allow me to this?

inline fun blah(
    f1: (em: EM) -> Unit = { },
    f2: (em: EM) -> Any? = { null } 
): Result {
    f1(em)
    val res = f2(em)
    return Result()
}

blah {
   // no statement here
}

and

blah {
   "a string statement" // statement which can be picked up by `val res = f2(em)`
}

In both cases the lambda is passed as the

f2

argument.

Currently scenario 1 doesn't compile, should it?

blah {
   // no statement here
}

Expected a value of Any?

Even when I reduce it to:

val ffun: (em: EntityManager) -> Any? = { null }

inline fun blah(
    noinline f: (em: EM) -> Any? = ffun
): Result {
    val res = f(em)
    return Result()
}

I think it should. If it's not, please report a bug.

cool, will do so