needs Rank2Types

ekmett · Jun 10, 2015 · f57ac83 · f57ac83
1 parent 79db48a
commit f57ac83
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/Math/Monad/Atkey.hs b/src/Math/Monad/Atkey.hs
@@ -1,5 +1,6 @@
 {-# LANGUAGE GADTs #-}
 {-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE RankNTypes #-}
 
 module Math.Monad.Atkey 
   ( At(..)