Hello, I've spent so much time without managing to...

# getting-started

[Gilles Barbier]

Hello, I've spent so much time without managing to get any response:

Given a Kfunction obtained from an expression such as obj::method where obj is an instance from a Class.

How can I retrieve the underlying obj from the Kfunction???

[smit01]

class Foo{
fun foo()=println("foo")
}
val obj:Foo = Foo()
val action:()->Unit = obj::foo
action.invoke()
action()

output :-
foo
foo

"If you could elaborate more on which object you want to retrieve and from what"??

[smit01]

Tyep of action KFunction0<Unit>

[Gilles Barbier]

yes, my question is: how do I retrieve obj from action?

[Gilles Barbier]

If I know only action , is there a way to access obj?

[Gilles Barbier]

Internally, obj is stored inside action - it's necessary to invoke it, but I can not find a way to access it

[Kirill Grouchnikov]

KFunction doesn't need to be defined on an object. What happens in that case with your requirements?

[Bhullnatik]

https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.reflect.full/instance-parameter.html

[Gilles Barbier]

@Bhullnatik it's counter intuitive, but instanceParameter is null when you provide an instance (obf::foo) - not null if you use the syntax Foo::foo 🤷‍♂️

[Gilles Barbier]

@Kirill Grouchnikov I understand it can be null, but I'd like to be able to retrieve it when not null

[smit01]

Not sure if this is possible but if someone knows how please explain us in briefly. I tried but still can't figure it out.