blob: 0aa66d7d96e9fab7f56dc58e788e075e28fe9715 (
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
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
module Main (main) where
import System.Environment
import Control.Monad.Except
import System.Console.Haskeline
import Utils
import Builtins
import Interpreter
parseArgs :: Config -> [String] -> Config
parseArgs config args =
case args of
("-i":fileName:rest) -> parseArgs
config { configScriptFileName = Just fileName } rest
("-v":rest) -> parseArgs
config { configVerboseMode = True } rest
("-h":rest) -> parseArgs
config { configShowHelp = True } rest
("-e":rest) -> parseArgs
config { configPrintEvaled = True } rest
("-s":rest) -> parseArgs
config { configPrintCallStack = True } rest
("-r":rest) -> parseArgs
config { configUseREPL = True } rest
_ -> config
repl :: LState -> InputT IO ()
repl ls = do
minput <- getInputLine "> "
case minput of
Nothing -> return ()
Just input -> do
result <- lift $ runL ls (runInlineScript "<repl>" input)
case result of
Left (LException mp ex) -> do
outputStrLn $ case mp of
Just p -> p ++ " error: " ++ ex
Nothing -> "error: " ++ ex
repl ls
Right (_, LState { stateEnv = newEnv }) -> do
repl ls { stateEnv = newEnv }
main :: IO ()
main = do
args <- getArgs
progName <- getProgName
let initialConfig = Config {
configScriptFileName = Nothing,
configVerboseMode = False,
configShowHelp = False,
configPrintEvaled = False,
configPrintCallStack = False,
configUseREPL = False
}
let config = parseArgs initialConfig args
ls = LState { stateConfig = config, stateEnv = builtinEnv }
if (configShowHelp config) then do
putStrLn $ "Usage: " ++ progName ++ " # to open REPL"
putStrLn $ " " ++ progName ++ " -i scriptFile # to run script file"
putStrLn $ " " ++ progName ++ " -h # to show this help"
putStrLn $ " " ++ progName ++ " -e # to automatically print results of evaluated expressions to stdout"
putStrLn $ " " ++ progName ++ " -s # to automatically print call stack of evaluated expressions to stdout"
putStrLn $ " " ++ progName ++ " -r # to open REPL, even after script file execution"
else do
when (configVerboseMode config) $ do
putStrLn $ "configScriptFileName:\t" ++ (show $ configScriptFileName config)
putStrLn $ "configVerboseMode:\t" ++ (show $ configVerboseMode config)
putStrLn $ "configShowHelp:\t" ++ (show $ configShowHelp config)
putStrLn $ "configPrintEvaled:\t" ++ (show $ configPrintEvaled config)
putStrLn $ "configPrintCallStack:\t" ++ (show $ configPrintCallStack config)
putStrLn $ "configUseREPL:\t" ++ (show $ configUseREPL config)
case (configScriptFileName config) of
Just scriptFileName -> do
result <- runL ls (runScriptFile scriptFileName)
case result of
Left (LException mp ex) -> case mp of
Just p -> putStrLn $ p ++ " error: " ++ ex
Nothing -> putStrLn $ "error: " ++ ex
Right (_, LState { stateEnv = evaledEnv }) -> do
when (configUseREPL config) $
runInputT defaultSettings (repl ls { stateEnv = evaledEnv })
Nothing -> do
putStrLn $ "Lang REPL"
putStrLn $ "Use CTRL+D to exit"
runInputT defaultSettings (repl ls)
|
