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| Module: | IO |
|---|---|
| Function: | hFlush |
| Type: | Handle -> IO () |
| Description: | Computation hFlush hdl causes any items buffered for output in handle hdl to be sent immediately to the operating system. Error reporting: the hFlush computation may fail with: isFullError if the device is full; isPermissionError if a system resource limit would be exceeded. It is unspecified whether the characters in the buffer are discarded or retained under these circumstances. |
| Related: |
Program source: import IO main = do hdl <- openFile "/tmp/foo.txt" WriteMode hPutStr hdl "Hello," hFlush hdl hPutStr hdl "world!" hFlush hdl hClose hdl hdl <- openFile "/tmp/foo.txt" ReadMode x <- hGetContents hdl putStr x hClose hdl
Output: Hello, world!
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