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

class (IDeletable a) => IGraph a where

upcastGraph :: forall a . (FPtr a, IGraph a) => a -> Graph
upcastGraph h
  = let fh = get_fptr h
        fh2 :: Ptr RawGraph = castPtr fh
      in cast_fptr_to_obj fh2

downcastGraph :: forall a . (FPtr a, IGraph a) => Graph -> a
downcastGraph h
  = let fh = get_fptr h
        fh2 = castPtr fh
      in cast_fptr_to_obj fh2
