hsk

var traits = {};

function trait(name, methods) {
    traits[name] = methods;
}

function struct() {
    var args = arguments;

    // インターフェイスを作成

hsk

trait Eq1 {
  fn eq1(&self, o: &Self) -> bool;
}
trait Eq2 {
  fn eq2(&self, o: &Self) -> bool;
}
struct I {i:int} impls Eq1, Eq2 {
  fn eq1(&self, o: &I) -> bool { (*o).i == (*self).i }
  fn eq2(&self, o: &I) -> bool { (*o).i == (*self).i }
}

hsk

// orignal code http://openpear.org/package/IO_MIDI/downloads

package midi
case class Midi(header:Header,tracks:List[Track])
trait Chunk
case class Header(format:Int,numberOfTracks:Int,divisionFlag:Int,division:Int) extends Chunk
case class Track(List[Event]) extends Chunk
trait Event

class IO_MIDI {

hsk

	def classify(xts:List[('a,Type.T)], ini:'b, addf:('b,'a)=>'b, addi:('b,'a,Type.T)=>'b):'b = {
		xts.foldLeft(ini) {
		case (acc, (x, t)) => t match {
				case Type.Unit() => acc
				case Type.Float() => addf(acc, x)
				case _ => addi(acc, x, t)
			}
		}
	}