Interface.hs

{-# LANGUAGE EmptyDataDecls, ExistentialQuantification,
  FlexibleContexts, FlexibleInstances, ForeignFunctionInterface,
  MultiParamTypeClasses, ScopedTypeVariables, TypeFamilies,
  TypeSynonymInstances #-}
module GDAL.OGRCurve.Interface where
import Data.Word
import Data.Int
import Foreign.C
import Foreign.Ptr
import FFICXX.Runtime.Cast
import GDAL.OGRCurve.RawType
import GDAL.OGRPointIterator.RawType
import GDAL.OGRGeometry.Interface

class (IOGRGeometry a) => IOGRCurve a where
        getNumPoints :: () => a -> IO CInt
        
        getPointIterator :: () => a -> IO OGRPointIterator

upcastOGRCurve :: forall a . (FPtr a, IOGRCurve a) => a -> OGRCurve
upcastOGRCurve h
  = let fh = get_fptr h
        fh2 :: Ptr RawOGRCurve = castPtr fh
      in cast_fptr_to_obj fh2

downcastOGRCurve ::
                 forall a . (FPtr a, IOGRCurve a) => OGRCurve -> a
downcastOGRCurve h
  = let fh = get_fptr h
        fh2 = castPtr fh
      in cast_fptr_to_obj fh2