diff --git a/src/App/Fontifier.hs b/src/App/Fontifier.hs
index 7121da3..f5776e1 100644
--- a/src/App/Fontifier.hs
+++ b/src/App/Fontifier.hs
@@ -198,7 +198,7 @@ invAcc a i ('[':t) = invAcc a (i+1 + g) (drop g t)      -- TODO check reads in f
 invAcc a i s@(c:t) = let writeAcc = getWrite i s
                          matchLen = (length $ (\(v,_,_) -> v) (fromJust writeAcc))
                      in if isNothing writeAcc
-                        then invAcc a (i+1) t -- no assignment in rest str
+                        then invAcc a (i+1) t -- no assignment in rest str TODO check for reads here
                         else invAcc (a ++ [fromJust writeAcc]) (i+1+matchLen) (drop matchLen t) -- assignment in accumStr, advance offset to end
 invAcc a _ _ = map (\(_,s,_) -> s) a
 
@@ -208,6 +208,18 @@ getWrite offset s = ((Tdfa.matchOnceText §~ "^(\\**[[:word:]]+)[[:blank:]]*=")
           let m = match ! 1 -- extract the match group (0 = the whole match)
           in Just (fst m, (offset+(fst (snd m)), offset+(length (fst m))), False)
 
+getRead :: Int -> String -> Maybe (String, Slice)
+getRead offset s = ((Tdfa.matchOnceText §~ "^(\\**[[:word:]]+)") s) >>= matchToString
+  where matchToString (before, match, after) =
+          let m = match ! 1 -- extract the match group (0 = the whole match)
+          in Just (fst m, (offset+(fst (snd m)), offset+(length (fst m))))
+
+isUnassigned :: String -> [(String,Slice,Bool)] -> Bool
+isUnassigned s = null . filter (\(t,_,_) -> t == s)
+
+markRead :: String -> [(String,Slice,Bool)] -> [(String,Slice,Bool)]
+--markRead s a = 
+
 enterBlock :: [(String,Slice,Bool)] -> [(String,Slice,Bool)]
 enterBlock = map (\(v,s,b) -> ('*':v,s,b))