X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Ftypecheck%2FTcEnv.lhs;h=1d093e2e7c4d1aa2a2760c25def972c16e72be7a;hb=15cb792d18b1094e98c035dca6ecec5dad516056;hp=936ec5b5ac36b64a688ec01690111d657c0e5427;hpb=c94408e522e5af3b79a5beadc7e6d15cee553ee7;p=ghc-hetmet.git

diff --git a/compiler/typecheck/TcEnv.lhs b/compiler/typecheck/TcEnv.lhs
index 936ec5b..1d093e2 100644
--- a/compiler/typecheck/TcEnv.lhs
+++ b/compiler/typecheck/TcEnv.lhs
@@ -45,19 +45,19 @@ module TcEnv(
 
 import HsSyn		( LRuleDecl, LHsBinds, LSig, 
 			  LHsTyVarBndr, HsTyVarBndr(..), pprLHsBinds,
-		 	  ExprCoFn(..), idCoercion, (<.>) )
+		 	  idCoercion, (<.>) )
 import TcIface		( tcImportDecl )
 import IfaceEnv		( newGlobalBinder )
 import TcRnMonad
 import TcMType		( zonkTcType, zonkTcTyVarsAndFV )
-import TcType		( Type, TcKind, TcTyVar, TcTyVarSet, TcType, TvSubst,
-			  substTy, substTyVar, tyVarsOfType, tcTyVarsOfTypes, mkTyConApp,
+import TcType		( Type, TcKind, TcTyVar, TcTyVarSet, TcType, 
+			  substTy, tyVarsOfType, tcTyVarsOfTypes, mkTyConApp,
 			  getDFunTyKey, tcTyConAppTyCon, tcGetTyVar, mkTyVarTy,
 			  tidyOpenType, isRefineableTy
 			)
 import TcGadt		( Refinement, refineType )
 import qualified Type	( getTyVar_maybe )
-import Id		( idName, isLocalId, setIdType )
+import Id		( idName, isLocalId )
 import Var		( TyVar, Id, idType, tyVarName )
 import VarSet
 import VarEnv
@@ -566,7 +566,7 @@ data InstBindings
 				-- specialised instances
 
   | NewTypeDerived 		
-        (Maybe TyCon)           -- maybe a coercion for the newtype
+        TyCon                   -- tycon for the newtype
                                 -- Used for deriving instances of newtypes, where the
 	[Type]			-- witness dictionary is identical to the argument 
 				-- dictionary.  Hence no bindings, no pragmas