@@ -16,7 +16,7 @@ import Data.Validator.Reference
1616import Import
1717
1818-- For GHCs before 7.10:
19−import Prelude hiding (any)
19+import Prelude hiding (any, elem)
2020
2121--------------------------------------------------
2222-- * $ref
@@ -81,7 +81,6 @@ instance Arbitrary EnumVal where
8181
8282enumVal :: EnumVal -> Value -> Maybe (Failure ())
8383enumVal (EnumVal vs) x
84− | null vs = Nothing
8584 | not (allUniqueValues' vs) = Nothing
8685 | x `elem` vs = Nothing
8786 | otherwise =