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

-- module HROOT.Class.Interface where

module HROOT.Class.TQObject.Interface where


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

import HROOT.Class.TQObject.RawType

import HROOT.Class.Deletable.Interface


class (IDeletable a) => ITQObject a where

instance Existable TQObject where
  data Exist TQObject = forall a. (FPtr a, ITQObject a) => ETQObject a

upcastTQObject :: (FPtr a, ITQObject a) => a -> TQObject
upcastTQObject h = let fh = get_fptr h
                       fh2 :: ForeignPtr RawTQObject = castForeignPtr fh
                   in cast_fptr_to_obj fh2