Question

Does there exist a general enrichment for f: A => B => ... => Z in scala/scalaz/shapeless/etc. such that f.uncurried:(A, B, ...) => Z?

Currently I have this, but I believe there must be a pre-existing, more general solution somewhere.

implicit def enrichMyCurriedFunction[A, B, C] = new EnrichedCurriedFunction[A, B, C](_)

class EnrichedCurriedFunction[A, B, C](f: A => B => C) {
  def uncurried: (A, B) => C = (a, b) => f(a)(b)
}

Answer 1

There indeed is a builtin function:

val foo = (x: Int) => (y: Int) => x+y
foo: Int => (Int => Int) = <function1>

Function.uncurried(foo)
res16: (Int, Int) => Int = <function2>