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Use th-abstraction to make GHC 9.0.1 compatible #12

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Use th-abstraction to make GHC 9.0.1 compatible #12

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3 changes: 2 additions & 1 deletion sdl2-image.cabal
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Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,8 @@ library
bytestring >= 0.10.4.0,
sdl2 >= 2.0,
text >= 1.1.0.0,
template-haskell
template-haskell,
th-abstraction >= 0.4.0.0

default-language:
Haskell2010
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7 changes: 4 additions & 3 deletions src/SDL/Raw/Helper.hs
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Expand Up @@ -17,9 +17,10 @@ inlined MonadIO variant. Use this to simplify the package's SDL.Raw.* modules.

module SDL.Raw.Helper (liftF) where

import Control.Monad (replicateM)
import Control.Monad.IO.Class (MonadIO, liftIO)
import Control.Monad (replicateM)
import Control.Monad.IO.Class (MonadIO, liftIO)
import Language.Haskell.TH
import Language.Haskell.TH.Datatype.TyVarBndr (plainTVSpecified)

-- | Given a name @fname@, a name of a C function @cname@ and the desired
-- Haskell type @ftype@, this function generates:
Expand Down Expand Up @@ -81,7 +82,7 @@ liftType = \case
m <- newName "m"
return $
ForallT
[PlainTV m]
[plainTVSpecified m]
[AppT (ConT ''MonadIO) $ VarT m]
(AppT (VarT m) t)
t -> return t