X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Futils%2FMonadUtils.hs;h=9b364aebb7901d8cd289e5cec7c400edb825f7bc;hb=8ee215b9aa2fe37b435e404aad8bb07c6ce1836d;hp=733eda17005dbac5ba482493241ca368735915d1;hpb=5e5a08eb37f5513cecb47101a97fdaf09c4be040;p=ghc-hetmet.git

diff --git a/compiler/utils/MonadUtils.hs b/compiler/utils/MonadUtils.hs
index 733eda1..9b364ae 100644
--- a/compiler/utils/MonadUtils.hs
+++ b/compiler/utils/MonadUtils.hs
@@ -18,7 +18,7 @@ module MonadUtils
         , concatMapM
         , mapMaybeM
         , anyM, allM
-        , foldlM, foldrM
+        , foldlM, foldlM_, foldrM
         , maybeMapM
         ) where
 
@@ -146,6 +146,10 @@ allM f (b:bs) = (f b) >>= (\bv -> if bv then allM f bs else return False)
 foldlM :: (Monad m) => (a -> b -> m a) -> a -> [b] -> m a
 foldlM = foldM
 
+-- | Monadic version of foldl that discards its result
+foldlM_ :: (Monad m) => (a -> b -> m a) -> a -> [b] -> m ()
+foldlM_ = foldM_
+
 -- | Monadic version of foldr
 foldrM        :: (Monad m) => (b -> a -> m a) -> a -> [b] -> m a
 foldrM _ z []     = return z