[project @ 2005-07-19 16:44:50 by simonpj]

[ghc-hetmet.git] / ghc / compiler / types / Generics.lhs

diff --git a/ghc/compiler/types/Generics.lhs b/ghc/compiler/types/Generics.lhs
index aa7ccf2..d6a4278 100644 (file)
--- a/ghc/compiler/types/Generics.lhs
+++ b/ghc/compiler/types/Generics.lhs
@@ -256,12 +256,14 @@ type FromAlt = (LPat RdrName, LHsExpr RdrName)
 mkTyConGenericBinds :: TyCon -> LHsBinds RdrName
 mkTyConGenericBinds tycon
   = unitBag (L loc (FunBind (L loc from_RDR) False {- Not infix -}
-                           (mkMatchGroup [mkSimpleHsAlt pat rhs | (pat,rhs) <- from_alts])))
+                           from_matches placeHolderNames))
 
        `unionBags`
     unitBag (L loc (FunBind (L loc to_RDR) False 
-                           (mkMatchGroup [mkSimpleHsAlt to_pat to_body])))
+                           to_matches placeHolderNames))
   where
+    from_matches = mkMatchGroup [mkSimpleHsAlt pat rhs | (pat,rhs) <- from_alts]
+    to_matches   = mkMatchGroup [mkSimpleHsAlt to_pat to_body]
     loc             = srcLocSpan (getSrcLoc tycon)
     datacons = tyConDataCons tycon
     (from_RDR, to_RDR) = mkGenericNames tycon