-descendNmc subdom dom = case subdom of
- [] ->
- case domMap dom of
- Nothing -> dom
- Just map ->
- case M.lookup "" map of -- Stupid, but "" is allowed in the map
- Nothing -> dom -- Try to merge it with the root data
- Just sub -> mergeNmc sub dom
- d:ds ->
- case domMap dom of
- Nothing -> emptyNmcDom
- Just map ->
- case M.lookup d map of
- Nothing -> emptyNmcDom
- Just sub -> descendNmc ds sub
+descendNmc subdom rawdom =
+ let dom = normalizeDom rawdom
+ in case subdom of
+ [] ->
+ case domMap dom of
+ Nothing -> dom
+ Just map ->
+ case M.lookup "" map of -- Stupid, but there are "" in the map
+ Nothing -> dom -- Try to merge it with the root data
+ Just sub -> mergeNmc sub dom -- Or maybe drop it altogether...
+ d:ds ->
+ case domMap dom of
+ Nothing -> emptyNmcDom
+ Just map ->
+ case M.lookup d map of
+ Nothing -> emptyNmcDom
+ Just sub -> descendNmc ds sub