use ByteString internally in Ident, CId and Label

src-3.0/GF/GFCC/CId.hs

@@ -1,14 +1,15 @@
-module GF.GFCC.CId (
-  module GF.GFCC.Raw.AbsGFCCRaw,
-  prCId,
-  cId
-  ) where
+module GF.GFCC.CId (CId(..), wildCId, mkCId, prCId) where
 
-import GF.GFCC.Raw.AbsGFCCRaw (CId(CId))
+import GF.Infra.PrintClass
+import Data.ByteString.Char8 as BS
+
+newtype CId = CId BS.ByteString deriving (Eq,Ord,Show)
+
+wildCId :: CId
+wildCId = CId (BS.singleton '_')
+
+mkCId :: String -> CId
+mkCId s = CId (BS.pack s)
 
 prCId :: CId -> String
-prCId (CId s) = s
-
-cId :: String -> CId
-cId = CId
-
+prCId (CId x) = BS.unpack x