``` val newFunction: (a: Int, b: Int) -> Unit = ::sum andThen ::format andThen ::printResult inf...

# arrow

[simon.vergauwen]

val newFunction: (a: Int, b: Int) -> Unit = ::sum andThen ::format andThen ::printResult

infix fun <A, B, C, D> ((A, B) -> C).andThen(f: (C) -> D): (A, B) -> D = { a, b ->
  f(this(a, b))
}

[jtonic]

Thank you Simon for the example.
I tried it but I have a compilation error in the newFunction declaration, first andThen

Error:(35, 59) Kotlin: Unresolved reference. None of the following candidates is applicable because of receiver type mismatch:
public inline infix fun <IP, R> (() -> @ParameterName Int).andThen(crossinline f: (a: Int) -> String): () -> String defined in arrow.syntax.function
public inline infix fun <P1, IP, R> ((???) -> @ParameterName Int).andThen(crossinline f: (a: Int) -> String): (???) -> String defined in arrow.syntax.function

[simon.vergauwen]

Did you add andThen from the snippet?

This works fine for me.

fun sum(a: Int, b: Int) = a + b
fun format(a: Int) = "Result: $a"
fun printResult(result: String) = println(result)
infix fun <A, B, C, D> ((A, B) -> C).andThen(f: (C) -> D): (A, B) -> D = { a, b ->
  f(this(a, b))
}

fun main(args: Array<String>) {
  (::sum andThen ::format andThen ::printResult)(4, 3)
}

[jtonic]

Thank you, Simon.
Yes. It works. And it looks amazing compared to pipe2, in terms of readability.
I am wondering if it makes sense to have at least a few variants of this in arrow library.