Add userCode function for the popular m `catchX` return ()

darcs-hash:20071012014217-a5988-06b6f1519b5f87fcbc8220ad5bd69181c721635a.gz

1 files changed, 6 insertions, 1 deletions

diff --git a/XMonad.hs b/XMonad.hs
index 4cc4607..cf72908 100644
--- a/XMonad.hs
+++ b/XMonad.hs
@@ -18,7 +18,7 @@
 module XMonad (
     X, WindowSet, WindowSpace, WorkspaceId, ScreenId(..), ScreenDetail(..), XState(..), XConf(..), LayoutClass(..), Layout(..), ReadableLayout(..),
     Typeable, Message, SomeMessage(..), fromMessage, runLayout,
-    runX, catchX, io, catchIO, withDisplay, withWindowSet, isRoot, getAtom, spawn, restart, trace, whenJust, whenX,
+    runX, catchX, userCode, io, catchIO, withDisplay, withWindowSet, isRoot, getAtom, spawn, restart, trace, whenJust, whenX,
     atom_WM_STATE, atom_WM_PROTOCOLS, atom_WM_DELETE_WINDOW
   ) where
 
@@ -95,6 +95,11 @@ catchX (X job) (X errcase) = do
     put s'
     return a
 
+-- | Execute the argument, catching all exceptions.  Either this function or
+-- catchX should be used at all callsites of user customized code.
+userCode :: X () -> X ()
+userCode a = catchX a (return ())
+
 -- ---------------------------------------------------------------------
 -- Convenient wrappers to state