{-# LANGUAGE EmptyDataDecls, ExistentialQuantification,
  FlexibleContexts, FlexibleInstances, ForeignFunctionInterface,
  MultiParamTypeClasses, ScopedTypeVariables, TypeFamilies,
  TypeSynonymInstances #-}
module OGDF.GraphIO.Interface where
import Data.Word
import Data.Int
import Foreign.C
import Foreign.Ptr
import FFICXX.Runtime.Cast
import OGDF.GraphIO.RawType
import STD.Deletable.Interface

class (IDeletable a) => IGraphIO a where

upcastGraphIO :: forall a . (FPtr a, IGraphIO a) => a -> GraphIO
upcastGraphIO h
  = let fh = get_fptr h
        fh2 :: Ptr RawGraphIO = castPtr fh
      in cast_fptr_to_obj fh2

downcastGraphIO :: forall a . (FPtr a, IGraphIO a) => GraphIO -> a
downcastGraphIO h
  = let fh = get_fptr h
        fh2 = castPtr fh
      in cast_fptr_to_obj fh2
