pipe2.scala

extension [A, B] (t: Tuple2[A, B])
  inline infix def ||>[C](inline f: (A, B) => C): C =
    f(t._1, t._2)

extension [T] (t: T)
  infix def |>[B](f: T => B): B =
    f(t)

def add(a:Int, b: Int):String = (a + b).toString

@main
def main():Unit =
  (1, 2) ||> add |> println