blob: fb8f866ec5f44dc7f7e3991a86d446b3dd3dcf38 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
import qualified System.Environment as Env
import System.Console.GetOpt( OptDescr )
import qualified System.Console.GetOpt as GetOpt
import Control.Exception( ErrorCall(..), Handler(..), catches )
import qualified Control.Monad as Monad
import Grasp.Parser
import Grasp.Interpreter
data Flag = Testing
deriving (Eq, Show)
usageString :: String
usageString = "Usage: grasp [--testing] <program file>"
options :: [OptDescr Flag]
options =
[ GetOpt.Option ['t'] ["testing"] (GetOpt.NoArg Testing) "Enables before and after showing of program graph" ]
program :: IO ()
program = do
(options, arguments, errors) <- Env.getArgs >>= return . GetOpt.getOpt GetOpt.Permute options
Monad.when (length options > 1) (error usageString)
Monad.when (length arguments /= 1) (error usageString)
Monad.when (length errors /= 0) (error usageString)
fileContents <- readFile (head arguments)
case (parseGrasp fileContents) of
Left x -> putStrLn (show x)
Right x -> if (Testing `elem` options)
then do
putStrLn "Input:"
putStrLn (show x)
y <- grasp x
putStrLn "\nOutput:"
putStrLn (show y)
else grasp x >> return ()
main = catches program
[ Handler ((\e -> putStrLn . show $ e) :: ErrorCall -> IO ()) ]
|
