HROOT-graf-0.9: src/HROOT/Graf/TArc/Cast.hs

{-# LANGUAGE FlexibleInstances, FlexibleContexts, TypeFamilies,
  MultiParamTypeClasses, OverlappingInstances, IncoherentInstances
  #-}
module HROOT.Graf.TArc.Cast where
import Foreign.Ptr
import FFICXX.Runtime.Cast
import System.IO.Unsafe
import HROOT.Graf.TArc.RawType
import HROOT.Graf.TArc.Interface

instance (ITArc a, FPtr a) => Castable a (Ptr RawTArc) where
        cast x f = f (castPtr (get_fptr x))
        uncast x f = f (cast_fptr_to_obj (castPtr x))

instance Castable TArc (Ptr RawTArc) where
        cast x f = f (castPtr (get_fptr x))
        uncast x f = f (cast_fptr_to_obj (castPtr x))