import Control.Monad
import Control.Applicative
from Data.Func import $
+import Data.Void
instance toString Error where
toString ParseError = "General parse error"
[] = (Left ParseError, [])
[x:xs] = (Right x, xs)
+peek :: Parser a a
+peek = Parser \i -> case i of
+ [] = (Left ParseError, [])
+ [x:xs] = (Right x, [x:xs])
+
+eof :: Parser a Void
+eof = Parser \i -> case i of
+ [] = (Right Void, [])
+ _ = (Left ParseError, i)
+
satisfy :: (a -> Bool) -> Parser a a
satisfy f = top >>= \r -> if (f r) (return r) fail
+check :: (a -> Bool) -> Parser a a
+check f = peek >>= \r -> if (f r) (return r) fail
+
item :: a -> Parser a a | Eq a
item a = satisfy ((==)a)
list :: [a] -> Parser a [a] | Eq a
-list as = mapM item as
+list as = mapM item as
\ No newline at end of file