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abstract class F {
type mType <: M
}
abstract class M { self =>
type mType <: M
type fType = F {type mType >: self.mType }
def fs: List[fType]
}
abstract class A0 extends M {
type mType = A0
def fs: List[fType] = Nil
}
object A extends A0 {}
abstract class B0 extends M {
type mType = B0
def fs: List[fType] = Nil
}
object B extends B0 {}
object C {
def ab = List(A) ::: List(B)
// the following compiles successfully:
// def ab = List(A) ::: List[M](B)
}
|
