X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Ftypecheck%2FTcDeriv.lhs;h=fab7c61ff07cd2e388a1bf4a0d7141255c112e18;hp=52ce0c20106540d2b614ca726a4f159b52e143fd;hb=HEAD;hpb=1b381af863d64aaa0a4dd9c816170c58e6131a9e

diff --git a/compiler/typecheck/TcDeriv.lhs b/compiler/typecheck/TcDeriv.lhs
index 52ce0c2..fab7c61 100644
--- a/compiler/typecheck/TcDeriv.lhs
+++ b/compiler/typecheck/TcDeriv.lhs
@@ -332,7 +332,7 @@ tcDeriving tycl_decls inst_decls deriv_decls
 
 	; dflags <- getDOpts
 	; liftIO (dumpIfSet_dyn dflags Opt_D_dump_deriv "Derived instances"
-	         (ddump_deriving inst_info rn_binds))
+	         (ddump_deriving inst_info rn_binds repMetaTys repTyCons metaInsts))
 {-
         ; when (not (null inst_info)) $
           dumpDerivingInfo (ddump_deriving inst_info rn_binds)
@@ -340,11 +340,26 @@ tcDeriving tycl_decls inst_decls deriv_decls
 	; return ( inst_info, rn_binds, rn_dus
                  , concat (map metaTyCons2TyCons repMetaTys), repTyCons) }
   where
-    ddump_deriving :: [InstInfo Name] -> HsValBinds Name -> SDoc
-    ddump_deriving inst_infos extra_binds
-      = hang (ptext (sLit "Derived instances"))
-           2 (vcat (map (\i -> pprInstInfoDetails i $$ text "") inst_infos)
-              $$ ppr extra_binds)
+    ddump_deriving :: [InstInfo Name] -> HsValBinds Name 
+                   -> [MetaTyCons] -- ^ Empty data constructors
+                   -> [TyCon]      -- ^ Rep type family instances
+                   -> [[(InstInfo RdrName, DerivAuxBinds)]] 
+                      -- ^ Instances for the repMetaTys
+                   -> SDoc
+    ddump_deriving inst_infos extra_binds repMetaTys repTyCons metaInsts
+      =    hang (ptext (sLit "Derived instances"))
+              2 (vcat (map (\i -> pprInstInfoDetails i $$ text "") inst_infos)
+                 $$ ppr extra_binds)
+        $$ hangP "Generic representation" (
+              hangP "Generated datatypes for meta-information"
+               (vcat (map ppr repMetaTys))
+           -- The Outputable instance for TyCon unfortunately only prints the name...
+           $$ hangP "Representation types" 
+                (vcat (map ppr  repTyCons))
+           $$ hangP "Meta-information instances"
+                (vcat (map (pprInstInfoDetails . fst) (concat metaInsts))))
+    
+    hangP s x = text "" $$ hang (ptext (sLit s)) 2 x
 
 
 renameDeriv :: Bool -> LHsBinds RdrName
@@ -476,7 +491,11 @@ makeDerivSpecs is_boot tycl_decls inst_decls deriv_decls
                                   (sel_tydata ++ sel_deriv_decls)) allTyNames
         -- We need to generate the extras to add to what has
         -- already been derived
-        ; mapM mkGenDerivExtras derTyDecls }
+        ; {- pprTrace "sel_tydata" (ppr sel_tydata) $
+          pprTrace "sel_deriv_decls" (ppr sel_deriv_decls) $
+          pprTrace "derTyDecls" (ppr derTyDecls) $
+          pprTrace "deriv_decls" (ppr deriv_decls) $ -}
+          mapM mkGenDerivExtras derTyDecls }
 
         -- Merge and return
         ; return ( eqns1 ++ eqns2, generic_extras_deriv) }
@@ -487,14 +506,22 @@ makeDerivSpecs is_boot tycl_decls inst_decls deriv_decls
 
     -- Extracts the name of the class in the deriving
     getClassName :: HsType Name -> Maybe Name
-    getClassName (HsPredTy (HsClassP n _)) = Just n
-    getClassName _                         = Nothing
+    getClassName (HsForAllTy _ _ _ (L _ n)) = getClassName n
+    getClassName (HsPredTy (HsClassP n _))  = Just n
+    getClassName _                          = Nothing
 
     -- Extracts the name of the type in the deriving
+    -- This function (and also getClassName above) is not really nice, and I
+    -- might not have covered all possible cases. I wonder if there is no easier
+    -- way to extract class and type name from a LDerivDecl...
     getTypeName :: HsType Name -> Maybe Name
+    getTypeName (HsForAllTy _ _ _ (L _ n))      = getTypeName n
     getTypeName (HsTyVar n)                     = Just n
     getTypeName (HsOpTy _ (L _ n) _)            = Just n
     getTypeName (HsPredTy (HsClassP _ [L _ n])) = getTypeName n
+    getTypeName (HsAppTy (L _ n) _)             = getTypeName n
+    getTypeName (HsParTy (L _ n))               = getTypeName n
+    getTypeName (HsKindSig (L _ n) _)           = getTypeName n
     getTypeName _                               = Nothing
 
     extractTyDataPreds decls
@@ -1590,7 +1617,8 @@ genGenericRepExtras tc =
       let metaDts = MetaTyCons metaDTyCon metaCTyCons metaSTyCons
   
       rep0_tycon <- tc_mkRepTyCon tc metaDts
-
+      
+      -- pprTrace "rep0" (ppr rep0_tycon) $
       return (metaDts, rep0_tycon)
 {-
 genGenericAll :: TyCon