-- Stability : provisional
-- Portability : portable
--
+-- NOTE: Data.FiniteMap is DEPRECATED, please use "Data.Map" instead.
+--
-- A finite map implementation, derived from the paper:
-- /Efficient sets: a balancing act/, S. Adams,
-- Journal of functional programming 3(4) Oct 1993, pp553-562
#define OUTPUTABLE_key {--}
#endif
-module Data.FiniteMap (
+module Data.FiniteMap
+ {-# DEPRECATED "Please use Data.Map instead." #-}
+ (
-- * The @FiniteMap@ type
FiniteMap, -- abstract type
#endif
) where
+import Prelude -- necessary to get dependencies right
+
import Data.Maybe ( isJust )
#ifdef __GLASGOW_HASKELL__
import GHC.Base
+import Data.Typeable
+import Data.Generics.Basics
+import Data.Generics.Instances
#endif
#ifdef __HADDOCK__
#endif /* not GHC */
+
-- ---------------------------------------------------------------------------
-- The signature of the module
-> FiniteMap key elt -> FiniteMap key elt -> FiniteMap key elt
-- | @(minusFM a1 a2)@ deletes from @a1@ any mappings which are bound in @a2@
-minusFM :: (Ord key OUTPUTABLE_key) => FiniteMap key elt -> FiniteMap key elt -> FiniteMap key elt
+minusFM :: (Ord key OUTPUTABLE_key) => FiniteMap key elt1 -> FiniteMap key elt2 -> FiniteMap key elt1
-- | @(intersectFM a1 a2)@ returns a new 'FiniteMap' containing
-- mappings from @a1@ for which @a2@ also has a mapping with the same
-- key.
intersectFM :: (Ord key OUTPUTABLE_key) => FiniteMap key elt -> FiniteMap key elt -> FiniteMap key elt
--- | Returns the interesction of two mappings, using the specified
+-- | Returns the intersection of two mappings, using the specified
-- combination function to combine values.
intersectFM_C :: (Ord key OUTPUTABLE_key) => (elt1 -> elt2 -> elt3)
-> FiniteMap key elt1 -> FiniteMap key elt2 -> FiniteMap key elt3
instance (Show k, Show e) => Show (FiniteMap k e) where
showsPrec p m = showsPrec p (fmToList m)
+instance Functor (FiniteMap k) where
+ fmap f = mapFM (const f)
+
+#if __GLASGOW_HASKELL__
+
+#include "Typeable.h"
+INSTANCE_TYPEABLE2(FiniteMap,arrayTc,"FiniteMap")
+
+-- This instance preserves data abstraction at the cost of inefficiency.
+-- We omit reflection services for the sake of data abstraction.
+
+instance (Data a, Data b, Ord a) => Data (FiniteMap a b) where
+ gfoldl f z fm = z listToFM `f` (fmToList fm)
+ toConstr _ = error "toConstr"
+ gunfold _ _ = error "gunfold"
+ dataTypeOf _ = mkNorepType "Data.FiniteMap.FiniteMap"
+
+#endif
+
+
-- ---------------------------------------------------------------------------
-- Adding to and deleting from @FiniteMaps@