haskell: Now, Object is an instance of NFData.

haskell/src/Data/MessagePack/Object.hs

@@ -25,6 +25,7 @@ module Data.MessagePack.Object(
   Result,
   ) where
 
+import Control.DeepSeq
 import Control.Monad
 import Control.Monad.Trans.Error ()
 import qualified Data.ByteString as B
@@ -41,6 +42,17 @@ data Object =
   | ObjectMap [(Object, Object)]
   deriving (Show)
 
+instance NFData Object where
+  rnf obj =
+    case obj of
+      ObjectNil -> ()
+      ObjectBool b -> rnf b
+      ObjectInteger n -> rnf n
+      ObjectDouble d -> rnf d
+      ObjectRAW bs -> bs `seq` ()
+      ObjectArray a -> rnf a
+      ObjectMap m -> rnf m
+
 -- | The class of types serializable to and from MessagePack object
 class OBJECT a where
   -- | Encode a value to MessagePack object