<Kotlin - Why can't I pass this method directly in...

# stackoverflow

[user]

Kotlin - Why can't I pass this method directly into the constructor, why do I need to use a lambda?
I just started to learn Kotlin yesterday, so brace yourself for a potentially stupid question.
class MyCustomViewAdapter(private val callback: (position: Int) -> Unit) : RecyclerView.Adapter() {
...
}

When I try to initialize this class, I need to pass in a callback parameter to receive events.
MyCustomViewAdapter({ position -> onClickFlowerCallback(position)}) // this works

MyCustomViewAdapter(onClickFlowerCallback) // this doesn't work?

private fun onClickFlowerCallback(position:...