First go at making Representable0 just a standard derivable class.

[ghc-hetmet.git] / compiler / typecheck / TcTyClsDecls.lhs

diff --git a/compiler/typecheck/TcTyClsDecls.lhs b/compiler/typecheck/TcTyClsDecls.lhs
index 653394f..c50dc99 100644 (file)
--- a/compiler/typecheck/TcTyClsDecls.lhs
+++ b/compiler/typecheck/TcTyClsDecls.lhs
@@ -30,7 +30,6 @@ import Class
 import TyCon
 import DataCon
 import Id
-import MkId            ( mkDefaultMethodId )
 import MkCore          ( rEC_SEL_ERROR_ID )
 import IdInfo
 import Var
@@ -1143,7 +1142,7 @@ checkValidClass cls
     unary      = isSingleton tyvars
     no_generics = null [() | (_, (GenDefMeth _)) <- op_stuff]
 
-    check_op constrained_class_methods (sel_id, dm) 
+    check_op constrained_class_methods (sel_id, _) 
       = addErrCtxt (classOpCtxt sel_id tau) $ do
        { checkValidTheta SigmaCtxt (tail theta)
                -- The 'tail' removes the initial (C a) from the
@@ -1164,7 +1163,7 @@ checkValidClass cls
 
                -- Check that for a generic method, the type of 
                -- the method is sufficiently simple
-{- -- JPM TODO
+{- -- JPM TODO  (when reinstating, remove commenting-out of badGenericMethodType
        ; checkTc (dm /= GenDefMeth || validGenericMethodType tau)
                  (badGenericMethodType op_name op_ty)
 -}
@@ -1195,7 +1194,7 @@ checkValidClass cls
 mkDefaultMethodIds :: [TyThing] -> [Id]
 -- See Note [Default method Ids and Template Haskell]
 mkDefaultMethodIds things
-  = [ mkDefaultMethodId sel_id dm_name
+  = [ mkExportedLocalId dm_name (idType sel_id)
     | AClass cls <- things
     , (sel_id, DefMeth dm_name) <- classOpItems cls ]
 \end{code}
@@ -1433,11 +1432,13 @@ genericMultiParamErr clas
   = ptext (sLit "The multi-parameter class") <+> quotes (ppr clas) <+> 
     ptext (sLit "cannot have generic methods")
 
+{-  Commented out until the call is reinstated
 badGenericMethodType :: Name -> Kind -> SDoc
 badGenericMethodType op op_ty
   = hang (ptext (sLit "Generic method type is too complex"))
        2 (vcat [ppr op <+> dcolon <+> ppr op_ty,
                ptext (sLit "You can only use type variables, arrows, lists, and tuples")])
+-}
 
 recSynErr :: [LTyClDecl Name] -> TcRn ()
 recSynErr syn_decls