This module provides a stateful, IO-based interface to Haskeline, which may be easier to
integrate into some existing programs or libraries.
It is strongly recommended to use the safer, monadic API of
System.Console.Haskeline, if possible, rather than the explicit state management
functions of this module.
The equivalent REPL example is:
import System.Console.Haskeline
import System.Console.Haskeline.IO
import Control.Concurrent
main = bracketOnError (initializeInput defaultSettings)
cancelInput -- This will only be called if an exception such
-- as a SigINT is received.
(\hd -> loop hd >> closeInput hd)
where
loop :: InputState -> IO ()
loop hd = do
minput <- queryInput hd (getInputLine "% ")
case minput of
Nothing -> return ()
Just "quit" -> return ()
Just input -> do queryInput hd $ outputStrLn
$ "Input was: " ++ input
loop hd
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