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Diffstat (limited to 'test/files/pos/t8170b.scala')
-rw-r--r-- | test/files/pos/t8170b.scala | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/test/files/pos/t8170b.scala b/test/files/pos/t8170b.scala new file mode 100644 index 0000000000..53036f6c8a --- /dev/null +++ b/test/files/pos/t8170b.scala @@ -0,0 +1,25 @@ +import language._ + +object ScalaZeee { + trait HFold[M[_], U] { + type Apply[E, A <: U] <: U + } + trait GenericCons[M[_], H, +T <: GenericList[M]] extends GenericList[M] { + val tail: T + override type Folded[N[X] >: M[X], U, F <: HFold[N, U]] = F#Apply[H, tail.Folded[N, U, F]] + } + val KNil: GenericList[Nothing] = ??? + sealed trait GenericList[+M[_]] { + type Folded[N[X] >: M[X], U, F <: HFold[N, U]] <: U + } +} + +object TypelevelUsage { + import ScalaZeee._ + type T = GenericCons[Some, String, KNil.type] + val klist1: T = ??? + type T2 = klist1.Folded[Option, Int, HFold[Option, Int]] + val count2: T2 = ??? + + count2.ensuring(x => true).toChar // trigger an implicit search +} |