Replace liftM with fmap

XMonad/Actions/GroupNavigation.hs

@@ -127,7 +127,7 @@ focusNextMatchOrDo qry act = findM (runQuery qry)
 -- Returns the list of windows ordered by workspace as specified in
 -- ~/.xmonad/xmonad.hs
 orderedWindowList :: Direction -> X (Seq Window)
-orderedWindowList History = liftM (\(HistoryDB w ws) -> maybe ws (ws |>) w) XS.get
+orderedWindowList History = fmap (\(HistoryDB w ws) -> maybe ws (ws |>) w) XS.get
 orderedWindowList dir     = withWindowSet $ \ss -> do
   wsids <- asks (Seq.fromList . workspaces . config)
   let wspcs = orderedWorkspaceList ss wsids

XMonad/Actions/RandomBackground.hs

@@ -55,7 +55,7 @@ randPermutation xs g = swap $ zip (randoms g) xs
 
 -- | @randomBg'@ produces a random hex number in the form @'#xxyyzz'@
 randomBg' ::  (MonadIO m) => RandomColor -> m String
-randomBg' (RGB l h) = io $ liftM (toHex . take 3 . randomRs (l,h)) newStdGen
+randomBg' (RGB l h) = io $ fmap (toHex . take 3 . randomRs (l,h)) newStdGen
 randomBg' (HSV s v) = io $ do
     g <- newStdGen
     let x = (^(2::Int)) $ fst $ randomR (0,sqrt $ pi / 3) g

XMonad/Actions/WorkspaceCursors.hs

@@ -162,7 +162,7 @@ focusDepth (End  _) = 0
 
 descend :: Monad m =>(W.Stack (Cursors a) -> m (W.Stack (Cursors a)))-> Int-> Cursors a-> m (Cursors a)
 descend f 1 (Cons x) = Cons <$> f x
-descend f n (Cons x) | n > 1 = liftM Cons $ descend f (pred n) `onFocus` x
+descend f n (Cons x) | n > 1 = fmap Cons $ descend f (pred n) `onFocus` x
 descend _ _ x = return x
 
 onFocus :: (Monad m) => (a1 -> m a1) -> W.Stack a1 -> m (W.Stack a1)

XMonad/Layout/IndependentScreens.hs

@@ -121,7 +121,7 @@ onCurrentScreen f vws = screen . current >>= f . flip marshall vws
 -- >     }
 --
 countScreens :: (MonadIO m, Integral i) => m i
-countScreens = liftM genericLength . liftIO $ openDisplay "" >>= liftA2 (<*) getScreenInfo closeDisplay
+countScreens = fmap genericLength . liftIO $ openDisplay "" >>= liftA2 (<*) getScreenInfo closeDisplay
 
 -- | This turns a naive pretty-printer into one that is aware of the
 -- independent screens. That is, you can write your pretty printer to behave

XMonad/Layout/Master.hs

@@ -90,7 +90,7 @@ data FixMaster a = FixMaster (AddMaster a) deriving (Show, Read)
 instance LayoutModifier FixMaster Window where
     modifyLayout (FixMaster (AddMaster k d f)) = applyMaster True k d f
     modifierDescription (FixMaster a) = "Fix" ++ modifierDescription a
-    pureMess (FixMaster a) m = liftM FixMaster (pureMess a m)
+    pureMess (FixMaster a) m = fmap FixMaster (pureMess a m)
 
 fixMastered :: (LayoutClass l a) =>
        Rational -- ^ @delta@, the ratio of the screen to resize by

XMonad/Prompt.hs

@@ -1204,7 +1204,7 @@ pasteString = pasteString' id
 -- | A variant of 'pasteString' which allows modifying the X selection before
 -- pasting.
 pasteString' :: (String -> String) -> XP ()
-pasteString' f = join $ io $ liftM (insertString . f) getSelection
+pasteString' f = join $ io $ fmap (insertString . f) getSelection
 
 -- | Remove a character at the cursor position
 deleteString :: Direction1D -> XP ()

XMonad/Prompt/AppendFile.hs

@@ -60,7 +60,7 @@ import Control.Exception.Extensible (bracket)
 -- before saving into the file. Previous example with date can be rewritten as:
 --
 -- > ,  ((modm .|. controlMask, xK_n), do
--- >            date <- io $ liftM (formatTime defaultTimeLocale "[%Y-%m-%d %H:%M] ") getZonedTime
+-- >            date <- io $ fmap (formatTime defaultTimeLocale "[%Y-%m-%d %H:%M] ") getZonedTime
 -- >            appendFilePrompt' def (date ++) $ "/home/me/NOTES"
 -- >        )
 --

XMonad/Prompt/DirExec.hs

@@ -103,5 +103,5 @@ getDirectoryExecutables path =
         filterM (\x -> let x' = path ++ x in
             liftA2 (&&)
                 (doesFileExist x')
-                (liftM executable (getPermissions x'))))
+                (fmap executable (getPermissions x'))))
     `E.catch` econst []

XMonad/Prompt/RunOrRaise.hs

@@ -76,7 +76,7 @@ pidof x = io $ (runProcessWithInput "pidof" [x] [] >>= readIO) `E.catch` econst
 pid :: Query Int
 pid = ask >>= (\w -> liftX $ withDisplay $ \d -> getPID d w)
     where getPID d w = getAtom "_NET_WM_PID" >>= \a -> io $
-                       liftM getPID' (getWindowProperty32 d a w)
+                       fmap getPID' (getWindowProperty32 d a w)
           getPID' (Just (x:_)) = fromIntegral x
           getPID' (Just [])     = -1
           getPID' (Nothing)     = -1

XMonad/Util/Dmenu.hs

@@ -58,7 +58,7 @@ menu menuCmd opts = menuArgs menuCmd [] opts
 
 -- | Like 'menu' but also takes a list of command line arguments.
 menuArgs :: MonadIO m => String -> [String] -> [String] -> m String
-menuArgs menuCmd args opts = liftM (filter (/='\n')) $
+menuArgs menuCmd args opts = fmap (filter (/='\n')) $
   runProcessWithInput menuCmd args (unlines opts)
 
 -- | Like 'dmenuMap' but also takes the command to run.

XMonad/Util/XSelection.hs

@@ -85,8 +85,8 @@ getSelection = io $ do
   details on the advantages and disadvantages of using safeSpawn. -}
 promptSelection, safePromptSelection, unsafePromptSelection :: String -> X ()
 promptSelection = unsafePromptSelection
-safePromptSelection app = join $ io $ liftM (safeSpawn app . return) getSelection
+safePromptSelection app = join $ io $ fmap (safeSpawn app . return) getSelection
-unsafePromptSelection app = join $ io $ liftM unsafeSpawn $ fmap (\x -> app ++ " " ++ x) getSelection
+unsafePromptSelection app = join $ io $ fmap unsafeSpawn $ fmap (\x -> app ++ " " ++ x) getSelection
 
 {- | A wrapper around 'promptSelection' and its safe variant. They take two parameters, the
      first is a function that transforms strings, and the second is the application to run.
@@ -94,5 +94,5 @@ unsafePromptSelection app = join $ io $ liftM unsafeSpawn $ fmap (\x -> app ++ "
      One example is to wrap code, such as a command line action copied out of the browser
      to be run as @"sudo" ++ cmd@ or @"su - -c \""++ cmd ++"\""@. -}
 transformPromptSelection, transformSafePromptSelection :: (String -> String) -> String -> X ()
-transformPromptSelection f app = join $ io $ liftM (safeSpawn app . return) (fmap f getSelection)
+transformPromptSelection f app = join $ io $ fmap (safeSpawn app . return) (fmap f getSelection)
-transformSafePromptSelection f app = join $ io $ liftM unsafeSpawn $ fmap (\x -> app ++ " " ++ x) (fmap f getSelection)
+transformSafePromptSelection f app = join $ io $ fmap unsafeSpawn $ fmap (\x -> app ++ " " ++ x) (fmap f getSelection)

tests/genMain.hs

@@ -56,7 +56,7 @@ genModule imports props = vcat [header,imports', main ]
                     hang (text "let props = ") 8
                         (brackets $ foldr1 (\x xs -> x <> comma $$ xs) props')
                     $$
-                    text "(results, passed) <- liftM unzip $ \
+                    text "(results, passed) <- fmap unzip $ \
                             \mapM (\\(s,a) -> printf \"%-40s: \" s >> a n) props"
                     $$
                     text "printf \"Passed %d tests!\\n\" (sum passed)"