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--- options-1.2.1-orig/lib/Options/Tokenize.hs 2014-12-14 16:34:53.000000000 +1100
+++ options-1.2.1/lib/Options/Tokenize.hs 2015-01-02 00:14:05.390013340 +1100
@@ -11,6 +11,7 @@
, tokenize
) where
+import Control.Applicative
import Control.Monad.Error hiding (throwError)
import qualified Control.Monad.Error
import Control.Monad.State
@@ -53,6 +54,13 @@
newtype Tok a = Tok { unTok :: ErrorT String (StateT TokState Identity) a }
+instance Functor Tok where
+ fmap = liftM
+
+instance Applicative Tok where
+ pure = return
+ (<*>) = ap
+
instance Monad Tok where
return = Tok . return
m >>= f = Tok (unTok m >>= unTok . f)
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