71 lines
1.9 KiB
Haskell
71 lines
1.9 KiB
Haskell
-- Program to test parser, automatically generated by BNF Converter.
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module Main where
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import System.Environment ( getArgs, getProgName )
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import System.Exit ( exitFailure, exitSuccess )
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import Control.Monad ( when )
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import Language.Lang.LexGrammer ( Token )
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import Language.Lang.ParGrammer ( pModule, myLexer )
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import Language.Lang.SkelGrammer ()
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import Language.Lang.PrintGrammer ( Print, printTree )
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import Language.Lang.AbsGrammer ()
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type Err = Either String
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type ParseFun a = [Token] -> Err a
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myLLexer = myLexer
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type Verbosity = Int
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putStrV :: Verbosity -> String -> IO ()
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putStrV v s = when (v > 1) $ putStrLn s
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runFile :: (Print a, Show a) => Verbosity -> ParseFun a -> FilePath -> IO ()
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runFile v p f = putStrLn f >> readFile f >>= run v p
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run :: (Print a, Show a) => Verbosity -> ParseFun a -> String -> IO ()
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run v p s = case p ts of
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Left s -> do
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putStrLn "\nParse Failed...\n"
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putStrV v "Tokens:"
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putStrV v $ show ts
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putStrLn s
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exitFailure
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Right tree -> do
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putStrLn "\nParse Successful!"
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showTree v tree
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exitSuccess
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where
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ts = myLLexer s
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showTree :: (Show a, Print a) => Int -> a -> IO ()
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showTree v tree
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= do
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putStrV v $ "\n[Abstract Syntax]\n\n" ++ show tree
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putStrV v $ "\n[Linearized tree]\n\n" ++ printTree tree
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usage :: IO ()
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usage = do
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putStrLn $ unlines
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[ "usage: Call with one of the following argument combinations:"
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, " --help Display this help message."
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, " (no arguments) Parse stdin verbosely."
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, " (files) Parse content of files verbosely."
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, " -s (files) Silent mode. Parse content of files silently."
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]
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exitFailure
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main :: IO ()
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main = do
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args <- getArgs
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case args of
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["--help"] -> usage
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[] -> getContents >>= run 2 pModule
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"-s":fs -> mapM_ (runFile 0 pModule) fs
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fs -> mapM_ (runFile 2 pModule) fs
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