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Remove legacy code that isn't used now that we require GHC >= 6.8
[ghc-hetmet.git]
/
compiler
/
utils
/
IOEnv.hs
diff --git
a/compiler/utils/IOEnv.hs
b/compiler/utils/IOEnv.hs
index
5f354f0
..
305e30e
100644
(file)
--- a/
compiler/utils/IOEnv.hs
+++ b/
compiler/utils/IOEnv.hs
@@
-139,15
+139,9
@@
unsafeInterleaveM (IOEnv m) = IOEnv (\ env -> unsafeInterleaveIO (m env))
-- For use if the user has imported Control.Monad.Error from MTL
-- Requires UndecidableInstances
-- For use if the user has imported Control.Monad.Error from MTL
-- Requires UndecidableInstances
-#if __GLASGOW_HASKELL__ > 606
--- for some reason, this doesn't compile with GHC 6.6:
--- utils/IOEnv.hs:144:33:
--- No instance for (MonadPlus IO)
--- arising from use of `mplus' at utils/IOEnv.hs:144:33-67
instance MonadPlus IO => MonadPlus (IOEnv env) where
mzero = IOEnv (const mzero)
m `mplus` n = IOEnv (\env -> unIOEnv m env `mplus` unIOEnv n env)
instance MonadPlus IO => MonadPlus (IOEnv env) where
mzero = IOEnv (const mzero)
m `mplus` n = IOEnv (\env -> unIOEnv m env `mplus` unIOEnv n env)
-#endif
----------------------------------------------------------------------
-- Accessing input/output
----------------------------------------------------------------------
-- Accessing input/output