appName =? "xmobar" --> liftX . withDisplay . (io .) . flip raiseWindow =<< ask
Couldn't match expected type `Endo WindowSet' with actual type `()'
Expected type: Display -> Window -> IO (Endo WindowSet)
Actual type: Display -> Window -> IO ()
In the first argument of `flip', namely `raiseWindow'
In the second argument of `(.)', namely `flip raiseWindow'
But I'll try to get back to the list with a version that works (for future reference).
*sigh* I always forget mangling it back to the type ManageHook expects...
appName =? "xmobar" --> (liftX . withDisplay . (io .) . flip raiseWindow =<< ask) <+> idHook
and may require extra parentheses depending on how you mix it into an existing ManageHook.
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