[commit: ghc] master: Add test for Trac #15352 (81d8b17)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/81d8b1792d01e0645468e35e23e758dd9c7a6349/ghc

>---------------------------------------------------------------

commit 81d8b1792d01e0645468e35e23e758dd9c7a6349
Author: Simon Peyton Jones <simonpj at microsoft.com>
Date:   Wed Jul 11 12:04:46 2018 +0100

    Add test for Trac #15352


>---------------------------------------------------------------

81d8b1792d01e0645468e35e23e758dd9c7a6349
 .../tests/indexed-types/should_compile/T15352.hs   | 31 ++++++++++++++++++++++
 testsuite/tests/indexed-types/should_compile/all.T |  2 ++
 2 files changed, 33 insertions(+)

diff --git a/testsuite/tests/indexed-types/should_compile/T15352.hs b/testsuite/tests/indexed-types/should_compile/T15352.hs
new file mode 100644
index 0000000..d83512f
--- /dev/null
+++ b/testsuite/tests/indexed-types/should_compile/T15352.hs
@@ -0,0 +1,31 @@
+{-# LANGUAGE TypeInType #-} -- or PolyKinds
+{-# LANGUAGE MultiParamTypeClasses #-}
+{-# LANGUAGE TypeFamilies #-}
+
+module T15352 where
+
+import Data.Kind
+
+class C (x :: Type) (y :: k) where
+  type F y
+
+
+type Hom k = k -> k -> Type
+
+type family Ob (p :: Hom k) :: k -> Constraint
+
+class ( obP ~ Ob p
+      , opP ~ Dom p
+      , obQ ~ Ob q
+      , opQ ~ Dom q
+      , p ~ Dom f
+      , q ~ Cod f
+      ) => Functor' (obP :: i -> Constraint)
+                    (opP :: Hom i)
+                    (p :: Hom i)
+                    (obQ :: j -> Constraint)
+                    (opQ :: Hom j)
+                    (q :: Hom j)
+                    (f :: i -> j) where
+  type Dom f :: Hom i
+  type Cod f :: Hom j
diff --git a/testsuite/tests/indexed-types/should_compile/all.T b/testsuite/tests/indexed-types/should_compile/all.T
index 3f27591..035c85d 100644
--- a/testsuite/tests/indexed-types/should_compile/all.T
+++ b/testsuite/tests/indexed-types/should_compile/all.T
@@ -288,3 +288,5 @@ test('T15318', normal, compile, [''])
 test('T15322', normal, compile, [''])
 test('T15322a', normal, compile_fail, [''])
 test('T15142', normal, compile, [''])
+test('T15352', normal, compile, [''])
+