HROOT-0.7: src/HROOT/Class/THStack/Interface.hs

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

-- module HROOT.Class.Interface where

module HROOT.Class.THStack.Interface where


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

import HROOT.Class.THStack.RawType

import HROOT.Class.TNamed.Interface


class (ITNamed a) => ITHStack a where

instance Existable THStack where
  data Exist THStack = forall a. (FPtr a, ITHStack a) => ETHStack a

upcastTHStack :: (FPtr a, ITHStack a) => a -> THStack
upcastTHStack h = let fh = get_fptr h
                      fh2 :: ForeignPtr RawTHStack = castForeignPtr fh
                  in cast_fptr_to_obj fh2