say I have two functions with the same signature, is it possible to somehow delegate to the other wi...

# announcements

[robstoll]

say I have two functions with the same signature, is it possible to somehow delegate to the other without the need to specify the arguments?

fun foo(i: Int): String = ...
fun bar(i: Int): String by foo // does not work, is there another syntax?

[Mark Murphy]

fun foo(i: Int) = i * i

val bar = ::foo

fun main() {
  println(bar(3))
}

This assigns a function reference to bar , which you can then use as a function.

[robstoll]

good hint but not exactly what I need though. It has to be a function as it is declared this way in the interface

[Tim McCormack]

Why?

[tynn]

Why not just fun bar(i: Int) = foo(i) ?

[robstoll]

because

is it possible to somehow delegate to the other without the need to specify the arguments?

[Tim McCormack]

So why doesn't val bar = ::foo work for you?

[Tim McCormack]

That makes bar the same function as foo.

[robstoll]

as I wrote, it has to fulfil the definition of an interface, for instance:

interface A{
    fun bar(i: Int)
}
class B: A{
    fun foo(i: Int) = TODO()
    override val bar = ::foo  // does not override something
}

[Tim McCormack]

Ahhh, I see.