[project @ 2005-09-18 10:01:57 by panne]

[ghc-base.git] / GHC / IOBase.lhs

diff --git a/GHC/IOBase.lhs b/GHC/IOBase.lhs
index 233148b..f0ce8de 100644 (file)
--- a/GHC/IOBase.lhs
+++ b/GHC/IOBase.lhs
@@ -14,14 +14,41 @@
 --
 -----------------------------------------------------------------------------
 
-module GHC.IOBase where
-
+-- #hide
+module GHC.IOBase(
+    IO(..), unIO, failIO, liftIO, bindIO, thenIO, returnIO, 
+    unsafePerformIO, unsafeInterleaveIO,
+  
+       -- To and from from ST
+    stToIO, ioToST, unsafeIOToST,
+
+       -- References
+    IORef(..), newIORef, readIORef, writeIORef, 
+    IOArray(..), newIOArray, readIOArray, writeIOArray, unsafeReadIOArray, unsafeWriteIOArray,
+    MVar(..),
+
+       -- Handles, file descriptors,
+    FilePath,  
+    Handle(..), Handle__(..), HandleType(..), IOMode(..), FD, 
+    isReadableHandleType, isWritableHandleType, isReadWriteHandleType, showHandle,
+  
+       -- Buffers
+    Buffer(..), RawBuffer, BufferState(..), BufferList(..), BufferMode(..),
+    bufferIsWritable, bufferEmpty, bufferFull, 
+
+       -- Exceptions
+    Exception(..), ArithException(..), AsyncException(..), ArrayException(..),
+    stackOverflow, heapOverflow, throw, throwIO, ioException, 
+    IOError, IOException(..), IOErrorType(..), ioError, userError,
+    ExitCode(..) 
+  ) where
+       
 import GHC.ST
 import GHC.Arr -- to derive Ix class
 import GHC.Enum -- to derive Enum class
 import GHC.STRef
 import GHC.Base
-import GHC.Num -- To get fromInteger etc, needed because of -fno-implicit-prelude
+--  import GHC.Num     -- To get fromInteger etc, needed because of -fno-implicit-prelude
 import Data.Maybe  ( Maybe(..) )
 import GHC.Show
 import GHC.List
@@ -396,6 +423,9 @@ isWritableHandleType WriteHandle     = True
 isWritableHandleType ReadWriteHandle = True
 isWritableHandleType _              = False
 
+isReadWriteHandleType ReadWriteHandle{} = True
+isReadWriteHandleType _                 = False
+
 -- | File and directory names are values of type 'String', whose precise
 -- meaning is operating system dependent. Files can be opened, yielding a
 -- handle which can then be used to operate on the contents of that file.