\begin{code}
module TcUnify where
import TcType	( TcTauType, BoxySigmaType )
import TcRnTypes( TcM )

-- This boot file exists only to tie the knot between
--		TcUnify and TcSimplify

unifyType :: TcTauType -> TcTauType -> TcM ()
zapToMonotype :: BoxySigmaType -> TcM TcTauType
\end{code}