Scalaz Endo

gistfile1.scala

//https://github.com/debasishg/scala-snippets/blob/master/src/main/scala/endofluent.scala
//http://debasishg.blogspot.com.au/2013/02/a-dsl-with-endo-monoids-for-free.html
object Somescala extends App {
// import endodsl._
//  val now = Calendar.getInstance.getTime
//  val p = 
//    project("xenos", now) {
//      for {
//        a <- task("study requirements")
//        b <- task("do analysis")
//        _ <- b dependsOn a
//        c <- task("design & code")
//        _ <- c dependsOn b
//        d <- c dependsOn a
//      } yield d
//    }
//  println(p)
  case class Cup(content:List[String]=Nil)
  
  val withSugar:Endo[Cup] = ((cup:Cup)=>cup.copy(content="sugar"::cup.content)).endo 
  val withCoffee:Endo[Cup] = ((cup:Cup)=>cup.copy(content="coffee"::cup.content)).endo
  val withWater:Endo[Cup] = ((cup:Cup)=>cup.copy(content="water"::cup.content)).endo
  def cup():Endo[Cup]=((cup:Cup) => Cup()).endo
  
  val emptyCup=Monoid[Endo[Cup]].zero
  println(emptyCup compose withSugar )
  
  //def cupOfCoffee(cup:Cup)=(withCoffee |+| withSugar |+| withWater).zero
   

  
}