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

-- module HROOT.Class.Interface where

module HROOT.Class.TGraphQQ.Interface where


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

import HROOT.Class.TGraphQQ.RawType

import HROOT.Class.TGraph.Interface


class (ITGraph a) => ITGraphQQ a where

instance Existable TGraphQQ where
  data Exist TGraphQQ = forall a. (FPtr a, ITGraphQQ a) => ETGraphQQ a

upcastTGraphQQ :: (FPtr a, ITGraphQQ a) => a -> TGraphQQ
upcastTGraphQQ h = let fh = get_fptr h
                       fh2 :: ForeignPtr RawTGraphQQ = castForeignPtr fh
                   in cast_fptr_to_obj fh2