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package namedparams
class C[type Elem, type Value](val elem: Elem) {
def toVal: Elem = ???
}
abstract class D[type Elem, V](elem: Elem) extends C[Elem, V](elem)
abstract class D2[Elem, V](elem: Elem) extends C[Elem, V](elem) // error
abstract class D3[type Elem, V](x: V) extends C[V, V](x) // error
abstract class D4[type Elem](elem: Elem) extends C[Elem, Elem] // error
object Test {
val c = new C[String, String]("A") {
override def toVal = elem
}
val x: c.Elem = c.elem
val c2: C { type Elem = String } = c
val c3 = new C[Elem = String, Value = Int]("B")
val c4 = new C[Elem = String]("C")
val x2: c2.Elem = c2.elem
val c5 = new C[Elem1 = String, Value0 = Int]("B") // error // error
def d2[E, V](x: E) = new C[Elem = E, Value = V](x)
val dup = d2[E = Int, V = String, E = Boolean](2) // error
val z1 = d2[Elem = Int, Value = String](1) // error // error
val z2 = d2[Value = String, Elem = Int](1) // error // error
val z3 = d2[Elem = Int](1) // error
val z4 = d2[Value = Int]("AAA") // error
val z5 = d2[Elem = Int][Value = String](1) //error // error
}
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