2 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
4 \section{@VarSet@: Variable sets}
8 VarSet, IdSet, TyVarSet,
9 emptyVarSet, unitVarSet, mkVarSet,
10 extendVarSet, extendVarSetList, extendVarSet_C,
11 elemVarSet, varSetElems, subVarSet,
12 unionVarSet, unionVarSets,
13 intersectVarSet, intersectsVarSet,
14 isEmptyVarSet, delVarSet, delVarSetList, delVarSetByKey,
15 minusVarSet, foldVarSet, filterVarSet,
16 lookupVarSet, mapVarSet, sizeVarSet, seqVarSet,
20 #include "HsVersions.h"
22 import Var ( Var, Id, TyVar )
23 import Unique ( Unique )
25 import UniqFM ( delFromUFM_Directly, addToUFM_C )
28 %************************************************************************
30 \subsection{@VarSet@s}
32 %************************************************************************
35 type VarSet = UniqSet Var
36 type IdSet = UniqSet Id
37 type TyVarSet = UniqSet TyVar
40 intersectVarSet :: VarSet -> VarSet -> VarSet
41 unionVarSet :: VarSet -> VarSet -> VarSet
42 unionVarSets :: [VarSet] -> VarSet
43 varSetElems :: VarSet -> [Var]
44 unitVarSet :: Var -> VarSet
45 extendVarSet :: VarSet -> Var -> VarSet
46 extendVarSetList:: VarSet -> [Var] -> VarSet
47 elemVarSet :: Var -> VarSet -> Bool
48 delVarSet :: VarSet -> Var -> VarSet
49 delVarSetList :: VarSet -> [Var] -> VarSet
50 minusVarSet :: VarSet -> VarSet -> VarSet
51 isEmptyVarSet :: VarSet -> Bool
52 mkVarSet :: [Var] -> VarSet
53 foldVarSet :: (Var -> a -> a) -> a -> VarSet -> a
54 lookupVarSet :: VarSet -> Var -> Maybe Var
55 -- Returns the set element, which may be
56 -- (==) to the argument, but not the same as
57 mapVarSet :: (Var -> Var) -> VarSet -> VarSet
58 sizeVarSet :: VarSet -> Int
59 filterVarSet :: (Var -> Bool) -> VarSet -> VarSet
60 extendVarSet_C :: (Var->Var->Var) -> VarSet -> Var -> VarSet
62 delVarSetByKey :: VarSet -> Unique -> VarSet
63 elemVarSetByKey :: Unique -> VarSet -> Bool
65 emptyVarSet = emptyUniqSet
66 unitVarSet = unitUniqSet
67 extendVarSet = addOneToUniqSet
68 extendVarSetList= addListToUniqSet
69 intersectVarSet = intersectUniqSets
71 intersectsVarSet:: VarSet -> VarSet -> Bool -- True if non-empty intersection
72 -- (s1 `intersectsVarSet` s2) doesn't compute s2 if s1 is empty
73 subVarSet :: VarSet -> VarSet -> Bool -- True if first arg is subset of second
74 -- (s1 `subVarSet` s2) doesn't compute s2 if s1 is empty
76 unionVarSet = unionUniqSets
77 unionVarSets = unionManyUniqSets
78 varSetElems = uniqSetToList
79 elemVarSet = elementOfUniqSet
80 minusVarSet = minusUniqSet
81 delVarSet = delOneFromUniqSet
82 delVarSetList = delListFromUniqSet
83 isEmptyVarSet = isEmptyUniqSet
85 foldVarSet = foldUniqSet
86 lookupVarSet = lookupUniqSet
87 mapVarSet = mapUniqSet
88 sizeVarSet = sizeUniqSet
89 filterVarSet = filterUniqSet
90 extendVarSet_C combine s x = addToUFM_C combine s x x
91 delVarSetByKey = delFromUFM_Directly -- Can't be bothered to add this to UniqSet
92 elemVarSetByKey = elemUniqSet_Directly
96 -- See comments with type signatures
97 intersectsVarSet s1 s2 = not (isEmptyVarSet (s1 `intersectVarSet` s2))
98 a `subVarSet` b = isEmptyVarSet (a `minusVarSet` b)
102 seqVarSet :: VarSet -> ()
103 seqVarSet s = sizeVarSet s `seq` ()