invokedynamic-binders.scala

  // a little one-time boilerplate
  def clazz[T](implicit manifest: M[T]) = manifest.erasure.asInstanceOf[Class[_ <: T]]
  def methodType[F: M] : MethodType = {
    val classes = manifest[F].typeArguments map (_.erasure)
    MethodType.methodType(classes.last, classes.init.toArray[Class[_]])
  }
  def from[F](implicit m: Manifest[F]): Binder = {
    val classes = manifest[F].typeArguments map (_.erasure)
    Binder.from(classes.last, classes.init.toArray).cast(methodType[F])
  }

  // fun with syntax
  def testType() {
    var binder = from[(String, String) => Int]
    assertEquals(methodType[(String, String) => Int], binder.`type`)
    binder = binder drop 1
    assertEquals(methodType[String => Int], binder.`type`)
  }

  def testInvoke() {
    val target = SBinderTest.concatHandle()
    val handle = from[(String, String) => String] invoke target
    
    assertEquals(methodType[(String, String) => String], handle.`type`)
    assertEquals("Hello, world", handle.invokeWithArguments("Hello, ", "world"))
  }