Split Reg into vreg/hreg and add register pairs

[ghc-hetmet.git] / compiler / utils / UniqSet.lhs

diff --git a/compiler/utils/UniqSet.lhs b/compiler/utils/UniqSet.lhs
index 9a03315..6d39e00 100644 (file)
--- a/compiler/utils/UniqSet.lhs
+++ b/compiler/utils/UniqSet.lhs
@@ -10,8 +10,10 @@ Basically, the things need to be in class @Uniquable@.
 
 \begin{code}
 module UniqSet (
+        -- * Unique set type
         UniqSet,    -- abstract type: NOT
 
+        -- ** Manipulating these sets
         mkUniqSet, uniqSetToList, emptyUniqSet, unitUniqSet,
         addOneToUniqSet, addListToUniqSet, addOneToUniqSet_C,
         delOneFromUniqSet, delListFromUniqSet, delOneFromUniqSet_Directly,
@@ -118,8 +120,8 @@ hashUniqSet (MkUniqSet set) = hashUFM set
 isEmptyUniqSet :: UniqSet a -> Bool
 isEmptyUniqSet (MkUniqSet set) = isNullUFM set {-SLOW: sizeUFM set == 0-}
 
-mapUniqSet :: (a -> a) -> UniqSet a -> UniqSet a
-  -- VERY IMPORTANT: *assumes* that the function doesn't change the unique
+-- | Invariant: the mapping function doesn't change the unique
+mapUniqSet :: (a -> b) -> UniqSet a -> UniqSet b
 mapUniqSet f (MkUniqSet set) = MkUniqSet (mapUFM f set)
 \end{code}