doesNotWork.scala

//This doesn't actually work, since function application has the highest precedence in Scala.
def repeat(self: String, times: Int) = self * times

val x = "ABC"
x~repeat(5)

extensionMethods.scala

object Extension {
  implicit def from[A](a: A): Extension[A] = Extension(a)
}

case class Extension[A](a: A) {
  def ~[R](f: A => R): R = f(a)
  def ~[R, B](f: (A, B) => R): B => R = f(a, _)
  def ~[R, B, C](f: (A, B, C) => R): (B, C) => R = f(a, _, _)
  def ~[R, B, C, D](f: (A, B, C, D) => R): (B, C, D) => R = f(a, _, _, _)
  //...etc
}