    {-# LANGUAGE DeriveDataTypeable, EmptyDataDecls, ForeignFunctionInterface #-}
    -- |
    -- Module      : Data.Text.ICU.Collate.Internal
    -- Copyright   : (c) 2010 Bryan O'Sullivan
    --
    -- License     : BSD-style
    -- Maintainer  : bos@serpentine.com
    -- Stability   : experimental
    -- Portability : GHC
    --
    -- Internals of the string collation infrastructure.

    module Data.Text.ICU.Number.Internal
        (
        -- * Unicode collation API
          MNumberFormat(..)
        , NumberFormat(..)
        , UNumberFormat
        , withNumberFormat
        , wrap
        )
    where

    import Data.Typeable (Typeable)
    import Foreign.ForeignPtr (ForeignPtr, withForeignPtr)
    import Foreign.Ptr (FunPtr, Ptr)
    import Data.Text.ICU.Internal (newICUPtr)

    -- $api
    --

    data UNumberFormat

    -- | This is the number formatter. It can be created with 'formatter'. Use it to format numbers with the 'format' function.
    data MNumberFormat = MNumberFormat {-# UNPACK #-} !(ForeignPtr UNumberFormat)
                     deriving (Typeable)

    -- | This is the number formatter. It can be created with 'formatter'. Use it to format numbers with the 'format' function.
    newtype NumberFormat = C MNumberFormat
        deriving (Typeable)

    withNumberFormat :: MNumberFormat -> (Ptr UNumberFormat -> IO a) -> IO a
    withNumberFormat :: forall a. MNumberFormat -> (Ptr UNumberFormat -> IO a) -> IO a
    withNumberFormat (MNumberFormat ForeignPtr UNumberFormat
    col) Ptr UNumberFormat -> IO a
    action = ForeignPtr UNumberFormat -> (Ptr UNumberFormat -> IO a) -> IO a
    forall a b. ForeignPtr a -> (Ptr a -> IO b) -> IO b
    withForeignPtr ForeignPtr UNumberFormat
    col Ptr UNumberFormat -> IO a
    action
    {-# INLINE withNumberFormat #-}

    wrap :: IO (Ptr UNumberFormat) -> IO MNumberFormat
    wrap :: IO (Ptr UNumberFormat) -> IO MNumberFormat
    wrap = (ForeignPtr UNumberFormat -> MNumberFormat)
    -> FinalizerPtr UNumberFormat
    -> IO (Ptr UNumberFormat)
    -> IO MNumberFormat
    forall a i.
    (ForeignPtr a -> i) -> FinalizerPtr a -> IO (Ptr a) -> IO i
    newICUPtr ForeignPtr UNumberFormat -> MNumberFormat
    MNumberFormat FinalizerPtr UNumberFormat
    unum_close
    {-# INLINE wrap #-}

    foreign import ccall unsafe "hs_text_icu.h &__hs_unum_close" unum_close
        :: FunPtr (Ptr UNumberFormat -> IO ())