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Corrected a bug in varsTouchedAfter that was related to flowAlgorithm and was causing the odd bug in checkUnusedVar

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Neil Brown 2008-11-20 15:39:28 +00:00
parent be6c57ce5b
commit ae7557d623
1 changed files with 3 additions and 3 deletions
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6
checks/CheckFramework.hs
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@ -410,13 +410,13 @@ varsTouchedAfter = FlowGraphAnalysis
iterate :: FlowGraph CheckOptM UsageLabel ->
(Node, EdgeLabel) -> Set.Set Var -> Maybe (Set.Set Var) -> Set.Set Var
iterate g node prevVars maybeVars = case lab g (fst node) of
iterate g node varsForPrevNode maybeVars = case lab g (fst node) of
Just ul ->
let vs = nodeVars $ getNodeData ul
readFromVars = readVars vs
writtenToVars = writtenVars vs
addTo = fromMaybe prevVars maybeVars
in (readFromVars `Set.union` addTo) `Set.union` Map.keysSet writtenToVars
addTo = fromMaybe Set.empty maybeVars
in foldl Set.union addTo [varsForPrevNode, readFromVars, Map.keysSet writtenToVars]
Nothing -> error "Node label not found in calculateUsedAgainAfter"