Haskell: read input character from console immediately, not after newline

Question

I\'ve tried this:

main = do
    hSetBuffering stdin NoBuffering 
    c <- getChar

but it waits until the enter is pressed, which is not

Answer 1

The Haskeline package worked for me.

If you need it for individual characters, then just change the sample slightly.

1. getInputLine becomes getInputChar
2. "quit" becomes 'q'
3. ++ input becomes ++ [input]

main = runInputT defaultSettings loop
    where 
        loop :: InputT IO ()
        loop = do
            minput <- getInputChar "% "
            case minput of
                Nothing -> return ()
                Just 'q' -> return ()
                Just input -> do outputStrLn $ "Input was: " ++ [input]
                                 loop