@@ -4,6 +4,7 @@
4{-# LANGUAGE FlexibleInstances #-}
4{-# LANGUAGE FlexibleInstances #-}
5{-# LANGUAGE UndecidableInstances #-}
5{-# LANGUAGE UndecidableInstances #-}
6{-# LANGUAGE DataKinds #-}
6{-# LANGUAGE DataKinds #-}
7+{-# LANGUAGE PolyKinds #-}
7{-# LANGUAGE GeneralizedNewtypeDeriving #-}
8{-# LANGUAGE GeneralizedNewtypeDeriving #-}
9-- | See "Control.Monad.Trans.State.Strict".
10-- | See "Control.Monad.Trans.State.Strict".