diff options
Diffstat (limited to 'compiler/GHC/Data/FiniteMap.hs')
-rw-r--r-- | compiler/GHC/Data/FiniteMap.hs | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/compiler/GHC/Data/FiniteMap.hs b/compiler/GHC/Data/FiniteMap.hs new file mode 100644 index 0000000000..055944d320 --- /dev/null +++ b/compiler/GHC/Data/FiniteMap.hs @@ -0,0 +1,31 @@ +-- Some extra functions to extend Data.Map + +module GHC.Data.FiniteMap ( + insertList, + insertListWith, + deleteList, + foldRight, foldRightWithKey + ) where + +import GHC.Prelude + +import Data.Map (Map) +import qualified Data.Map as Map + +insertList :: Ord key => [(key,elt)] -> Map key elt -> Map key elt +insertList xs m = foldl' (\m (k, v) -> Map.insert k v m) m xs + +insertListWith :: Ord key + => (elt -> elt -> elt) + -> [(key,elt)] + -> Map key elt + -> Map key elt +insertListWith f xs m0 = foldl' (\m (k, v) -> Map.insertWith f k v m) m0 xs + +deleteList :: Ord key => [key] -> Map key elt -> Map key elt +deleteList ks m = foldl' (flip Map.delete) m ks + +foldRight :: (elt -> a -> a) -> a -> Map key elt -> a +foldRight = Map.foldr +foldRightWithKey :: (key -> elt -> a -> a) -> a -> Map key elt -> a +foldRightWithKey = Map.foldrWithKey |