{-# LANGUAGE EmptyDataDecls, ExistentialQuantification,
  FlexibleContexts, FlexibleInstances, ForeignFunctionInterface,
  MultiParamTypeClasses, ScopedTypeVariables, TypeFamilies,
  TypeSynonymInstances #-}
module HROOT.Core.TKey.Interface where
import Data.Word
import Foreign.C
import Foreign.Ptr
import FFICXX.Runtime.Cast
import HROOT.Core.TKey.RawType
import HROOT.Core.TNamed.Interface
import {-# SOURCE #-} HROOT.Core.TClass.Interface
import {-# SOURCE #-} HROOT.Core.TDirectory.Interface

class ITNamed a => ITKey a

upcastTKey :: forall a . (FPtr a, ITKey a) => a -> TKey
upcastTKey h
  = let fh = get_fptr h
        fh2 :: Ptr RawTKey = castPtr fh
      in cast_fptr_to_obj fh2

downcastTKey :: forall a . (FPtr a, ITKey a) => TKey -> a
downcastTKey h
  = let fh = get_fptr h
        fh2 = castPtr fh
      in cast_fptr_to_obj fh2