import Data.Data
\end{code}
-\begin{code}
--- Unicode TODO: put isSymbol in libcompat
-#if !defined(__GLASGOW_HASKELL__) || __GLASGOW_HASKELL__ > 604
-#else
-isSymbol :: a -> Bool
-isSymbol = const False
-#endif
-
-\end{code}
-
%************************************************************************
%* *
\subsection{Name space}