1 files changed, 3 insertions, 2 deletions
diff --git a/src/Array.hs b/src/Array.hs
index 0d585a9..d7dadbf 100644
--- a/src/Array.hs
+++ b/src/Array.hs
@@ -1,6 +1,7 @@
-{-# LANGUAGE KindSignatures #-}
 {-# LANGUAGE DataKinds #-}
+{-# LANGUAGE DeriveTraversable #-}
 {-# LANGUAGE GADTs #-}
+{-# LANGUAGE KindSignatures #-}
 {-# LANGUAGE StandaloneDeriving #-}
 {-# LANGUAGE TupleSections #-}
 module Array where
@@ -47,7 +48,7 @@ emptyShape (SS m) = emptyShape m `ShCons` 0
 
 -- | TODO: this Vector is a boxed vector, which is horrendously inefficient.
 data Array (n :: Nat) t = Array (Shape n) (Vector t)
-  deriving (Show)
+  deriving (Show, Functor, Foldable, Traversable)
 
 arrayShape :: Array n t -> Shape n
 arrayShape (Array sh _) = sh