``` fun counter():()->Int{ var c=0 fun g():In...

# announcements

[Ifvwm]

fun counter():()->Int{
 var c=0
 fun g():Int{
  c++
  return c
 }
 return g
}

why “Function invocation g() expected”?

[mbonnin]

I guess you need to declare g a val ?

[mbonnin]

val g: (() -> Int) = {
   c++
   c
}

[Dominaezzz]

Try return ::g?

[Ifvwm]

but g is a function, I cannot return a function?

[Ifvwm]

ok, ::g is ok, weird syntax, why it shouldn’t be like return variable?

[Dominaezzz]

g isn't a variable. To return it like a variable you have to do what @mbonnin described.

[mbonnin]

You need an instance of a function type. It's explained there: https://kotlinlang.org/docs/reference/lambdas.html#instantiating-a-function-type

[Ifvwm]

val counter:()->()->Int = {
 var c=0
 val g = {
  c++
  c
 }
 g
}

[Dominaezzz]

val counter:()->()->Int = {
 var c=0
 {
  c++
  c
 }
}

[Dominaezzz]

🙂

[Ifvwm]

wow

[Kroppeb]

isn't c++;c equal to ++c

[Dominaezzz]

True

val counter:()->()->Int = {
 var c=0
 {
  ++c
 }
}