diff options
Diffstat (limited to 'tests/pending')
-rw-r--r-- | tests/pending/pos/depmet_implicit_chaining_zw.scala | 28 |
1 files changed, 0 insertions, 28 deletions
diff --git a/tests/pending/pos/depmet_implicit_chaining_zw.scala b/tests/pending/pos/depmet_implicit_chaining_zw.scala deleted file mode 100644 index a9da1e976..000000000 --- a/tests/pending/pos/depmet_implicit_chaining_zw.scala +++ /dev/null @@ -1,28 +0,0 @@ -trait Zero -trait Succ[N] - -trait ZipWith[N, S] { - type T - val x: T = sys.error("") -} - -object ZipWith { - implicit def ZeroZipWith[S]: ZipWith[Zero,S]{type T = Stream[S]} = new ZipWith[Zero, S] { - type T = Stream[S] - } - - implicit def SuccZipWith[N, S, R](implicit zWith : ZipWith[N, R]): ZipWith[Succ[N],S => R]{type T = Stream[S] => zWith.T} = new ZipWith[Succ[N], S => R] { - type T = Stream[S] => zWith.T // dependent types replace the associated types functionality - } - - // can't use implicitly[ZipWith[Succ[Succ[Zero]], Int => String => Boolean]], - // since that will chop of the {type T = ... } refinement in adapt (pt = ZipWith[Succ[Succ[Zero]], Int => String => Boolean]) - // this works - // def zipWith(implicit zw: ZipWith[Succ[Succ[Zero]], Int => String => Boolean]): zw.T = zw.x - // thus, I present ?: implicitly on steroids! - def ?[T <: AnyRef](implicit w: T): w.type = w - - type _2 = Succ[Succ[Zero]] - val zw = ?[ZipWith[_2, Int => String => Boolean]].x // : Stream[Int] => Stream[String] => Stream[Boolean] - // val zw = implicitly[ZipWith[Succ[Succ[Zero]], Int => String => Boolean]{type T = Stream[Int] => Stream[String] => Stream[Boolean]}].x -} |