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-rw-r--r--compiler/utils/MonadUtils.hs6
1 files changed, 5 insertions, 1 deletions
diff --git a/compiler/utils/MonadUtils.hs b/compiler/utils/MonadUtils.hs
index 733eda1700..9b364aebb7 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