[project @ 2004-01-27 09:52:37 by ross]

generalize the type of minusFM

diff --git a/Data/FiniteMap.hs b/Data/FiniteMap.hs
index e63d92b..ee18419 100644 (file)
--- a/Data/FiniteMap.hs
+++ b/Data/FiniteMap.hs
@@ -180,7 +180,7 @@ plusFM_C    :: (Ord key OUTPUTABLE_key) => (elt -> elt -> elt)
                           -> 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