type Variables = [Map Ident Value]
-inList :: Eq a => a -> [a] -> Bool
-inList _ [] = False
-inList a (x:xs) = if a == x then True else inList a xs
-
--eval :: (MonadState Variables m) => Exp -> m Value
eval :: Exp -> StateT Variables IO Value
eval (EBool b) = return (VBool b)
eval (BiOpExp e o e') = do
v <- eval e
v'<- eval e'
- if inList o [Eq,NEq] then return $ opE o v v'
+ if elem o [Eq,NEq] then return $ opE o v v'
else let (VInt n1) = v in let (VInt n2) = v' in return $ op o n1 n2
eval (EPost i o) = do
(VInt n) <- getVariableValue i
getWord :: IO String
getWord = do
c <- getChar
- if inList c [' ', '\n', '\t', '\r']
+ if elem c [' ', '\n', '\t', '\r']
then return ""
else do
l <- getWord