-==================== Parser ====================
-module Read003 where
-~(a, b, c)
- | nullity b = a
- | nullity c = a
- | otherwise = a
- where
- nullity = null
-
-
-
read003.hs:4:
Occurs check: cannot construct the infinite type: t = (t, [a], t1)
Expected type: (t, [a], t1)