import Ctype
import Util ( maybePrefixMatch, readRational )
-import DATA_BITS
+import Data.Bits
import Data.Char ( chr, isSpace )
-import Ratio
-import TRACE
+import Data.Ratio
+import Debug.Trace
#if __GLASGOW_HASKELL__ >= 605
import Data.Char ( GeneralCategory(..), generalCategory, isPrint, isUpper )