Improve the Hoogle backend's treatment of type families (#808)

Fixes parts 1 and 2 of #806.

1 files changed, 23 insertions, 0 deletions

diff --git a/hoogle-test/src/Bug806/Bug806.hs b/hoogle-test/src/Bug806/Bug806.hs
new file mode 100644
index 00000000..6efcb5cf
--- /dev/null
+++ b/hoogle-test/src/Bug806/Bug806.hs
@@ -0,0 +1,23 @@
+{-# LANGUAGE KindSignatures #-}
+{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE UndecidableInstances #-}
+module Bug806 where
+
+import Data.Proxy
+
+-- | 'F1' docs
+type family F1 a b :: * -> *
+-- | 'F2' docs
+type family F2 a b :: * -> * where
+  F2 Int b = Maybe
+  F2 a   b = []
+-- | 'D' docs
+data family D a :: * -> *
+
+v :: Int
+v = 42
+
+-- | 'C' docs
+class C a where
+  -- | 'AT' docs
+  type AT a