module Data.Pipe.IO (fromHandle, toHandle, fromFile, toFile) where
import "monads-tf" Control.Monad.Trans
import Control.Monad.Trans.Control
import Data.Pipe
import System.IO
fromHandle :: MonadIO m => Handle -> Pipe () Char m ()
fromHandle h = liftIO (hGetChar h) >>= (>> fromHandle h) . yield
toHandle :: MonadIO m => Handle -> Pipe Char () m ()
toHandle h = await >>= maybe (return ()) ((>> toHandle h) . liftIO . hPutChar h)
fromFile :: (MonadIO m, MonadBaseControl IO m) => FilePath -> Pipe () Char m ()
fromFile fp = bracket (liftIO $ openFile fp ReadMode) (liftIO . hClose) fromHandle
toFile :: (MonadIO m, MonadBaseControl IO m) => FilePath -> Pipe Char () m ()
toFile fp = bracket (liftIO $ openFile fp WriteMode) (liftIO . hClose) toHandle