-{-# OPTIONS_GHC -fno-warn-unused-do-bind #-}
-
module Main where
-import Data.Text as T (Text)
-import qualified Data.Text.IO as T
-import Data.Attoparsec.Text
-import qualified Data.Map as M
-import Control.Applicative
import System.Environment
-import Lambda
-
-data Definition = Definition String Term
-
-dictionary :: [Definition] -> M.Map String Term
-dictionary = M.fromList . map (\ (Definition s t) -> (s, t))
-
-parseDefinition :: Parser Definition
-parseDefinition = do
- name <- many1 letter
- char '='
- t <- parseTerm
- return $! Definition name t
-
-parseFile :: Text -> ([Definition], [Term])
-parseFile txt = case cnt of
- (Right t) -> t
- (Left e) -> error e
- where cnt = parseOnly (parserF <* endOfInput) txt
- parserF = do
- defs <- many (parseDefinition <* char '\n')
- terms <- many (parseTerm <* char '\n')
- return $! (defs, terms)
-
-printEval :: Term -> IO ()
-printEval t = do
- putStrLn $ show t ++ ":"
- putStrLn $ " " ++ show (reduce t)
- putStrLn ""
+import Lambda.Interpreter as L
main :: IO ()
main = do
[filename] <- getArgs
- (defs, terms) <- parseFile <$> T.readFile filename
- mapM_ printEval terms
+ L.interpret filename