Created
February 6, 2020 08:51
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scala> trait Eff[+R[_], A] | |
// defined trait Eff | |
scala> enum Reader[I, A] { case Ask[I]() extends Reader[I, I] } | |
// defined class Reader | |
scala> enum Writer[W, A] { case Tell[W](value: W) extends Writer[W, Unit] } | |
// defined class Writer | |
scala> def run[A](eff: Eff[Nothing, A]): A = ??? | |
def run[A](eff: Eff[Nothing, A]): A | |
scala> def runWriter[W, R[_], A](eff: Eff[[A] =>> Writer[W, A] | R[A], A]): Eff[R, (W, A)] = ??? | |
def runWriter | |
[W, R[_$2], A](eff: Eff[[A] => Writer[W, A] | R[A], A]): Eff[R, (W, A)] | |
scala> def runReader[I, R[_], A](i: I)(eff: Eff[[A] =>> Reader[I, A] | R[A], A]): Eff[R, A] = ??? | |
def runReader | |
[I, R[_$2], A](i: I)(eff: Eff[[A] => Reader[I, A] | R[A], A]): Eff[R, A] | |
scala> def e: Eff[[A] =>> Writer[String, A] | Reader[Int, A], Int] = ??? | |
def e: Eff[[A] => Writer[String, A] | Reader[Int, A], Int] | |
scala> def r = run(runReader(0)(runWriter(e))) | |
def r: (String, Int) |
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