The bits common to TcInstDcls and TcDeriv.
\begin{code}
+{-# OPTIONS_GHC -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+-- http://hackage.haskell.org/trac/ghc/wiki/WorkingConventions#Warnings
+-- for details
+
module InstEnv (
DFunId, OverlapFlag(..),
Instance(..), pprInstance, pprInstanceHdr, pprInstances,