{- |
Copyright  : Will Thompson, Iñaki García Etxebarria and Jonas Platte
License    : LGPL-2.1
Maintainer : Iñaki García Etxebarria (garetxe@gmail.com)

The 'GI.GLib.Structs.Data.Data' struct is an opaque data structure to represent a
[Keyed Data List][glib-Keyed-Data-Lists]. It should only be
accessed via the following functions.
-}

module GI.GLib.Structs.Data
    ( 

-- * Exported types
    Data(..)                                ,
    noData                                  ,


    ) where

import Data.GI.Base.ShortPrelude
import qualified Data.GI.Base.ShortPrelude as SP
import qualified Data.GI.Base.Overloading as O
import qualified Prelude as P

import qualified Data.GI.Base.Attributes as GI.Attributes
import qualified Data.GI.Base.ManagedPtr as B.ManagedPtr
import qualified Data.GI.Base.GError as B.GError
import qualified Data.GI.Base.GVariant as B.GVariant
import qualified Data.GI.Base.GParamSpec as B.GParamSpec
import qualified Data.GI.Base.CallStack as B.CallStack
import qualified Data.Text as T
import qualified Data.ByteString.Char8 as B
import qualified Data.Map as Map
import qualified Foreign.Ptr as FP


newtype Data = Data (ManagedPtr Data)
-- XXX Wrapping a foreign struct/union with no known destructor or size, leak?
instance WrappedPtr Data where
    wrappedPtrCalloc = return nullPtr
    wrappedPtrCopy = return
    wrappedPtrFree = Nothing

noData :: Maybe Data
noData = Nothing


instance O.HasAttributeList Data
type instance O.AttributeList Data = DataAttributeList
type DataAttributeList = ('[ ] :: [(Symbol, *)])

type family ResolveDataMethod (t :: Symbol) (o :: *) :: * where
    ResolveDataMethod l o = O.MethodResolutionFailed l o

instance (info ~ ResolveDataMethod t Data, O.MethodInfo info Data p) => O.IsLabelProxy t (Data -> p) where
    fromLabelProxy _ = O.overloadedMethod (O.MethodProxy :: O.MethodProxy info)

#if MIN_VERSION_base(4,9,0)
instance (info ~ ResolveDataMethod t Data, O.MethodInfo info Data p) => O.IsLabel t (Data -> p) where
    fromLabel _ = O.overloadedMethod (O.MethodProxy :: O.MethodProxy info)
#endif