author  Wuzzy <almikes@aol.com> 
Fri, 06 May 2016 17:26:06 +0200  
changeset 11814  8eccc307ca1e 
parent 7969  7fcbbd46704a 
permissions  rwrr 
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module Main where 
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import PascalParser 
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import System 
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import Control.Monad 
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import Data.Either 
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import Data.List 
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import Data.Graph 
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import Data.Maybe 
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unident :: Identificator > String 
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unident (Identificator s) = s 
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extractUnits :: PascalUnit > (String, [String]) 
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extractUnits (Program (Identificator name) (Implementation (Uses idents) _ _) _) = ("program " ++ name, map unident idents) 
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extractUnits (Unit (Identificator name) (Interface (Uses idents1) _) (Implementation (Uses idents2) _ _) _ _) = (name, map unident $ idents1 ++ idents2) 
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f :: [(String, [String])] > String 
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f = unlines . map showSCC . stronglyConnComp . map (\(a, b) > (a, a, b)) 
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where 
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showSCC (AcyclicSCC v) = v 
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showSCC (CyclicSCC vs) = intercalate ", " vs 
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myf :: [(String, [String])] > String 
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myf d = unlines . map (findCycle . fst) $ d 
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where 
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findCycle :: String > String 
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findCycle searched = searched ++ ": " ++ (intercalate ", " $ fc searched []) 
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where 
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fc :: String > [String] > [String] 
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fc curSearch visited = let uses = curSearch `lookup` d; res = dropWhile null . map t $ fromJust uses in if isNothing uses  null res then [] else head res 
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where 
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t u = 
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if u == searched then 
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[u] 
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else 
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if u `elem` visited then 
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[] 
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else 
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let chain = fc u (u:visited) in if null chain then [] else u:chain 
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main = do 
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fileNames < getArgs 
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files < mapM readFile fileNames 
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putStrLn . myf . map extractUnits . rights . map parsePascalUnit $ files 