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author | Martin Odersky <odersky@gmail.com> | 2015-06-25 09:47:26 +0200 |
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committer | Martin Odersky <odersky@gmail.com> | 2015-06-25 09:47:26 +0200 |
commit | 1e9ffd45ed3c7782ae2f21ed0361e776a122897b (patch) | |
tree | c18a53f41cc2aa4892eb8394d99771d6ed04fc9d /tests/pending/pos | |
parent | f3f75cad600d616db43138b09b01fcea93affd58 (diff) | |
download | dotty-1e9ffd45ed3c7782ae2f21ed0361e776a122897b.tar.gz dotty-1e9ffd45ed3c7782ae2f21ed0361e776a122897b.tar.bz2 dotty-1e9ffd45ed3c7782ae2f21ed0361e776a122897b.zip |
Add test from pending.
Diffstat (limited to 'tests/pending/pos')
-rw-r--r-- | tests/pending/pos/depmet_implicit_chaining_zw.scala | 32 |
1 files changed, 0 insertions, 32 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 f0e8a373b..000000000 --- a/tests/pending/pos/depmet_implicit_chaining_zw.scala +++ /dev/null @@ -1,32 +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 _0 = Zero - type _1 = Succ[Zero] - type _2 = Succ[Succ[Zero]] - val zw = ?[ZipWith[_2, Int => String => Boolean]]( - SuccZipWith[_1, Int, String => Boolean]( - SuccZipWith[_0, String, Boolean])).x - // val zw = implicitly[ZipWith[Succ[Succ[Zero]], Int => String => Boolean]{type T = Stream[Int] => Stream[String] => Stream[Boolean]}].x -} |