2 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
4 \section{@VarSet@: Variable sets}
8 VarSet, IdSet, TyVarSet, UVarSet,
9 emptyVarSet, unitVarSet, mkVarSet,
10 extendVarSet, extendVarSet_C,
11 elemVarSet, varSetElems, subVarSet,
12 unionVarSet, unionVarSets,
13 intersectVarSet, intersectsVarSet,
14 isEmptyVarSet, delVarSet, delVarSetByKey,
15 minusVarSet, foldVarSet, filterVarSet,
16 lookupVarSet, mapVarSet, sizeVarSet, seqVarSet
19 #include "HsVersions.h"
21 import Var ( Var, Id, TyVar, UVar )
22 import Unique ( Unique )
24 import UniqFM ( delFromUFM_Directly, addToUFM_C )
27 %************************************************************************
29 \subsection{@VarSet@s}
31 %************************************************************************
34 type VarSet = UniqSet Var
35 type IdSet = UniqSet Id
36 type TyVarSet = UniqSet TyVar
37 type UVarSet = UniqSet UVar
40 intersectVarSet :: VarSet -> VarSet -> VarSet
41 intersectsVarSet:: VarSet -> VarSet -> Bool -- True if non-empty intersection
42 unionVarSet :: VarSet -> VarSet -> VarSet
43 unionVarSets :: [VarSet] -> VarSet
44 varSetElems :: VarSet -> [Var]
45 unitVarSet :: Var -> VarSet
46 extendVarSet :: VarSet -> Var -> VarSet
47 elemVarSet :: Var -> VarSet -> Bool
48 delVarSet :: VarSet -> Var -> VarSet
49 minusVarSet :: VarSet -> VarSet -> VarSet
50 isEmptyVarSet :: VarSet -> Bool
51 mkVarSet :: [Var] -> VarSet
52 foldVarSet :: (Var -> a -> a) -> a -> VarSet -> a
53 lookupVarSet :: VarSet -> Var -> Maybe Var
54 -- Returns the set element, which may be
55 -- (==) to the argument, but not the same as
56 mapVarSet :: (Var -> Var) -> VarSet -> VarSet
57 sizeVarSet :: VarSet -> Int
58 filterVarSet :: (Var -> Bool) -> VarSet -> VarSet
59 subVarSet :: VarSet -> VarSet -> Bool
60 extendVarSet_C :: (Var->Var->Var) -> VarSet -> Var -> VarSet
62 delVarSetByKey :: VarSet -> Unique -> VarSet
64 emptyVarSet = emptyUniqSet
65 unitVarSet = unitUniqSet
66 extendVarSet = addOneToUniqSet
67 intersectVarSet = intersectUniqSets
68 intersectsVarSet s1 s2 = not (isEmptyVarSet (s1 `intersectVarSet` s2))
69 unionVarSet = unionUniqSets
70 unionVarSets = unionManyUniqSets
71 varSetElems = uniqSetToList
72 elemVarSet = elementOfUniqSet
73 minusVarSet = minusUniqSet
74 delVarSet = delOneFromUniqSet
75 isEmptyVarSet = isEmptyUniqSet
77 foldVarSet = foldUniqSet
78 lookupVarSet = lookupUniqSet
79 mapVarSet = mapUniqSet
80 sizeVarSet = sizeUniqSet
81 filterVarSet = filterUniqSet
82 extendVarSet_C combine s x = addToUFM_C combine s x x
83 a `subVarSet` b = isEmptyVarSet (a `minusVarSet` b)
84 delVarSetByKey = delFromUFM_Directly -- Can't be bothered to add this to UniqSet
88 seqVarSet :: VarSet -> ()
89 seqVarSet s = sizeVarSet s `seq` ()