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Don't use * as Type in the presence of TypeOperators #148

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Merged
kolmodin merged 1 commit into from
Jun 7, 2018
Merged

Don't use * as Type in the presence of TypeOperators #148

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13 changes: 12 additions & 1 deletion src/Data/Binary/Generic.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,10 @@
{-# LANGUAGE Safe #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}

#if __GLASGOW_HASKELL__ >= 800
#define HAS_DATA_KIND
#endif

-----------------------------------------------------------------------------
-- |
-- Module : Data.Binary.Generic
Expand All @@ -27,6 +31,9 @@ import Data.Binary.Put
import Data.Bits
import Data.Word
import Data.Monoid ((<>))
#ifdef HAS_DATA_KIND
import Data.Kind
#endif
import GHC.Generics
import Prelude -- Silence AMP warning.

Expand Down Expand Up @@ -136,7 +143,11 @@ instance GBinaryPut a => GSumPut (C1 c a) where
class SumSize f where
sumSize :: Tagged f Word64

newtype Tagged (s :: * -> *) b = Tagged {unTagged :: b}
#ifdef HAS_DATA_KIND
newtype Tagged (s :: Type -> Type) b = Tagged {unTagged :: b}
#else
newtype Tagged (s :: * -> *) b = Tagged {unTagged :: b}
#endif

instance (SumSize a, SumSize b) => SumSize (a :+: b) where
sumSize = Tagged $ unTagged (sumSize :: Tagged a Word64) +
Expand Down