Add test for Trac #15352

2 files changed, 33 insertions, 0 deletions

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 0000000000..d83512f085
--- /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 3f2759132a..035c85d179 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, [''])
+