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IO

Synopsis

Handle
HandlePosn
IOMode (ReadMode, WriteMode, AppendMode, ReadWriteMode)
BufferMode (NoBuffering, LineBuffering, BlockBuffering)
SeekMode (AbsoluteSeek, RelativeSeek, SeekFromEnd)
stdin
stdout
stderr
openFile
hClose
hFileSize
hIsEOF
isEOF
hSetBuffering
hGetBuffering
hFlush
hGetPosn
hSetPosn
hSeek
hWaitForInput
hReady
hGetChar
hGetLine
hLookAhead
hGetContents
hPutChar
hPutStr
hPutStrLn
hPrint
hIsOpen
hIsClosed
hIsReadable
hIsWritable
hIsSeekable
isAlreadyExistsError
isDoesNotExistError
isAlreadyInUseError
isFullError
isEOFError
isIllegalOperation
isPermissionError
isUserError
ioeGetErrorString
ioeGetHandle
ioeGetFileName
try
bracket :: IO a -> (a -> IO b) -> (a -> IO c) -> IO c
bracket_ :: IO a -> (a -> IO b) -> IO c -> IO c
IO
FilePath
IOError
ioError
userError
catch
interact
putChar
putStr
putStrLn
print
getChar
getLine
getContents
readFile
writeFile
appendFile
readIO
readLn

Documentation
Handle
HandlePosn
IOMode (ReadMode, WriteMode, AppendMode, ReadWriteMode)
BufferMode (NoBuffering, LineBuffering, BlockBuffering)
SeekMode (AbsoluteSeek, RelativeSeek, SeekFromEnd)
stdin
stdout
stderr
openFile
hClose
hFileSize
hIsEOF
isEOF
hSetBuffering
hGetBuffering
hFlush
hGetPosn
hSetPosn
hSeek
hWaitForInput
hReady
hGetChar
hGetLine
hLookAhead
hGetContents
hPutChar
hPutStr
hPutStrLn
hPrint
hIsOpen
hIsClosed
hIsReadable
hIsWritable
hIsSeekable
isAlreadyExistsError
isDoesNotExistError
isAlreadyInUseError
isFullError
isEOFError
isIllegalOperation
isPermissionError
isUserError
ioeGetErrorString
ioeGetHandle
ioeGetFileName
try

bracket :: IO a -> (a -> IO b) -> (a -> IO c) -> IO c | Source

The `bracket` function captures a common allocate, compute, deallocate idiom in which the deallocation step must occur even in the case of an error during computation. This is similar to try-catch-finally in Java. This version handles only IO errors, as defined by Haskell 98. The version of `bracket` in Control.Exception handles all exceptions, and should be used instead.

bracket_ :: IO a -> (a -> IO b) -> IO c -> IO c | Source

A variant of `bracket` where the middle computation doesn't want `x`. This version handles only IO errors, as defined by Haskell 98. The version of `bracket_` in Control.Exception handles all exceptions, and should be used instead.
IO
FilePath
IOError
ioError
userError
catch
interact
putChar
putStr
putStrLn
print
getChar
getLine
getContents
readFile
writeFile
appendFile
readIO
readLn
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