diff options
Diffstat (limited to 'compiler/utils/IOEnv.hs')
| -rw-r--r-- | compiler/utils/IOEnv.hs | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/compiler/utils/IOEnv.hs b/compiler/utils/IOEnv.hs index d6807da71a..e62a2bcddf 100644 --- a/compiler/utils/IOEnv.hs +++ b/compiler/utils/IOEnv.hs @@ -1,4 +1,5 @@ {-# LANGUAGE CPP #-} +{-# LANGUAGE DeriveFunctor #-} -- -- (c) The University of Glasgow 2002-2006 -- @@ -51,7 +52,7 @@ import Control.Applicative (Alternative(..)) ---------------------------------------------------------------------- -newtype IOEnv env a = IOEnv (env -> IO a) +newtype IOEnv env a = IOEnv (env -> IO a) deriving (Functor) unIOEnv :: IOEnv env a -> (env -> IO a) unIOEnv (IOEnv m) = m @@ -71,9 +72,6 @@ instance Applicative (IOEnv m) where IOEnv f <*> IOEnv x = IOEnv (\ env -> f env <*> x env ) (*>) = thenM_ -instance Functor (IOEnv m) where - fmap f (IOEnv m) = IOEnv (\ env -> fmap f (m env)) - returnM :: a -> IOEnv env a returnM a = IOEnv (\ _ -> return a) |