Refactoring of hsXxxBinders

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

diff --git a/compiler/typecheck/TcDeriv.lhs b/compiler/typecheck/TcDeriv.lhs
index 3a05380..af68408 100644 (file)
--- a/compiler/typecheck/TcDeriv.lhs
+++ b/compiler/typecheck/TcDeriv.lhs
@@ -436,10 +436,7 @@ makeDerivSpecs is_boot tycl_decls inst_decls deriv_decls
 
     all_tydata :: [(LHsType Name, LTyClDecl Name)]
        -- Derived predicate paired with its data type declaration
-    all_tydata = extractTyDataPreds tycl_decls ++
-                [ pd                -- Traverse assoc data families
-                 | L _ (InstDecl _ _ _ ats) <- inst_decls
-                , pd <- extractTyDataPreds ats ]
+    all_tydata = extractTyDataPreds (instDeclATs inst_decls ++ tycl_decls)
 
     deriv_locs = map (getLoc . snd) all_tydata
                 ++ map getLoc deriv_decls