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- -----------------------------------------------------------------------------
- -- Standard Library: IO operations, beyond those included in the prelude
- --
- -- WARNING: The names and semantics of functions defined in this module
- -- may change as the details of the IO standard are clarified.
- --
- -- Suitable for use with Hugs 1.3.
- -----------------------------------------------------------------------------
-
- module IO where
-
- -- Functions for inspecting IOErrors:
-
- primitive isUserError :: IOError -> Maybe String
- primitive isIllegalError,
- isAlreadyExists,
- isAlreadyInUse,
- isFullError,
- isEOFError,
- isPermissionError :: IOError -> Bool
- primitive ioeGetHandle :: IOError -> Maybe Handle
- primitive ioeGetFileName :: IOError -> Maybe FilePath
-
- -- Various handle-oriented operations:
-
- data Handle -- builtin datatype of IO handles
-
- data IOMode = ReadMode | WriteMode | AppendMode
- deriving (Eq, Ord, Enum, Show, Read)
-
- primitive stdin :: Handle
- primitive stdout :: Handle
- primitive stderr :: Handle
- primitive hGetContents :: Handle -> IO String
- primitive openFile :: FilePath -> IOMode -> IO Handle
- primitive hClose :: Handle -> IO ()
- primitive hFlush :: Handle -> IO ()
- primitive hIsEOF :: Handle -> IO Bool
- primitive hPutChar :: Handle -> Char -> IO ()
- primitive hPutStr :: Handle -> String -> IO ()
- primitive hGetChar :: Handle -> IO Char
- primitive getCh :: IO Char
-
- isEOF :: IO Bool
- isEOF = hIsEOF stdin
-
- -----------------------------------------------------------------------------
-