{-# LANGUAGE ForeignFunctionInterface, TypeFamilies, MultiParamTypeClasses, 
             FlexibleInstances, TypeSynonymInstances, 
             EmptyDataDecls, ExistentialQuantification, ScopedTypeVariables #-}

-- module HROOT.Class.Interface where

module HROOT.Class.TAtt3D.Interface where


import Data.Word
import Foreign.ForeignPtr
import HROOT.TypeCast

import HROOT.Class.TAtt3D.RawType

import HROOT.Class.Deletable.Interface


class (IDeletable a) => ITAtt3D a where

instance Existable TAtt3D where
  data Exist TAtt3D = forall a. (FPtr a, ITAtt3D a) => ETAtt3D a

upcastTAtt3D :: (FPtr a, ITAtt3D a) => a -> TAtt3D
upcastTAtt3D h = let fh = get_fptr h
                     fh2 :: ForeignPtr RawTAtt3D = castForeignPtr fh
                 in cast_fptr_to_obj fh2