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System.IO.UTF8

Portability | portable
Stability | experimental
Maintainer | emertens@galois.com

Description
String IO preserving UTF8 encoding.
Synopsis

print :: Show a => a -> IO ()
putStr :: String -> IO ()
putStrLn :: String -> IO ()
getLine :: IO String
readLn :: Read a => IO a
openBinaryFile :: FilePath -> IOMode -> IO Handle
withBinaryFile :: FilePath -> IOMode -> (Handle -> IO a) -> IO a
readFile :: FilePath -> IO String
writeFile :: FilePath -> String -> IO ()
appendFile :: FilePath -> String -> IO ()
interact :: (String -> String) -> IO ()
getContents :: IO String
hGetLine :: Handle -> IO String
hGetContents :: Handle -> IO String
hPutStr :: Handle -> String -> IO ()
hPutStrLn :: Handle -> String -> IO ()

Documentation

print :: Show a => a -> IO () | Source

The `print` function outputs a value of any printable type to the standard output device. This function differs from the System.IO.print in that it preserves any UTF8 encoding of the shown value.

putStr :: String -> IO () | Source

Write a UTF8 string to the standard output device

putStrLn :: String -> IO () | Source

The same as `putStr`, but adds a newline character.

getLine :: IO String | Source

Read a UTF8 line from the standard input device

readLn :: Read a => IO a | Source

The `readLn` function combines `getLine` and readIO, preserving UTF8

openBinaryFile :: FilePath -> IOMode -> IO Handle | Source

withBinaryFile :: FilePath -> IOMode -> (Handle -> IO a) -> IO a | Source

readFile :: FilePath -> IO String | Source

The `readFile` function reads a file and returns the contents of the file as a UTF8 string. The file is read lazily, on demand, as with `getContents`.

writeFile :: FilePath -> String -> IO () | Source

The computation `writeFile` `file str` function writes the UTF8 string `str`, to the file `file`.

appendFile :: FilePath -> String -> IO () | Source

The computation `appendFile` `file str` function appends the UTF8 string `str`, to the file `file`.

interact :: (String -> String) -> IO () | Source

getContents :: IO String | Source

Lazily read stdin as a UTF8 string.

hGetLine :: Handle -> IO String | Source

Read a UTF8 line from a Handle

hGetContents :: Handle -> IO String | Source

Lazily read a UTF8 string from a Handle

hPutStr :: Handle -> String -> IO () | Source

Write a UTF8 string to a Handle.

hPutStrLn :: Handle -> String -> IO () | Source

Write a UTF8 string to a Handle, appending a newline.
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