structure ccross:> CCROSS = struct
  structure T:> TOKENIZER =
    Tokenizer(structure H = Hashtable; structure S = Stream)
  structure ppc:> PPC = ppc(structure Tree = Tree; structure T = T)
  structure D:> DRIVER = Driver(ppc)
  structure ExnHandler: EXN_HANDLER = ExnHandler
end

val () = MLton.Exn.setTopLevelHandler ccross.ExnHandler.handler
val () = ccross.D.exec ()