1 files changed, 8 insertions, 38 deletions
diff --git a/src/declarative/qml/qmlprivate.h b/src/declarative/qml/qmlprivate.h
index 62524aa..3f41fb7 100644
--- a/src/declarative/qml/qmlprivate.h
+++ b/src/declarative/qml/qmlprivate.h
@@ -123,43 +123,13 @@ namespace QmlPrivate
         }
     };
 
-    template <typename T>  
-    class has_attachedPropertiesMember
-    {  
-        typedef int yes_type;
-        typedef char no_type;
-        template <int> 
-        struct Selector {};
-
-        template <typename S> 
-        static yes_type test(Selector<sizeof(&S::qmlAttachedProperties)>*); 
-
-        template <typename S> 
-        static no_type test(...); 
-
-    public: 
-        static bool const value = sizeof(test<T>(0)) == sizeof(yes_type);
-    };
-
-    template <typename T, bool hasMember>
-    class has_attachedPropertiesMethod 
+    template<typename T, typename Sign = T *(*)(QObject *)>
+    struct has_qmlAttachedProperties
     {
-        typedef int yes_type;
-        typedef char no_type;
-
-        template<typename ReturnType>
-        static yes_type check(ReturnType *(*)(QObject *));
-        static no_type check(...);
-
-    public:
-        static bool const value = sizeof(check(&T::qmlAttachedProperties)) == sizeof(yes_type);
-    }; 
-
-    template <typename T>
-    class has_attachedPropertiesMethod<T, false>
-    {
-    public:
-        static bool const value = false;
+        template <typename U, U> struct type_check;
+        template <typename _1> static char check(type_check<Sign, &_1::qmlAttachedProperties> *);
+        template <typename   > static int check(...);
+        static bool const value = sizeof(check<T>(0)) == sizeof(char);
     };
 
     template<typename T, int N>
@@ -191,13 +161,13 @@ namespace QmlPrivate
     template<typename T>
     inline QmlAttachedPropertiesFunc attachedPropertiesFunc()
     {
-        return AttachedPropertySelector<T, has_attachedPropertiesMethod<T, has_attachedPropertiesMember<T>::value>::value>::func();
+        return AttachedPropertySelector<T, has_qmlAttachedProperties<T>::value >::func();
     }
 
     template<typename T>
     inline const QMetaObject *attachedPropertiesMetaObject()
     {
-        return AttachedPropertySelector<T, has_attachedPropertiesMethod<T, has_attachedPropertiesMember<T>::value>::value>::metaObject();
+        return AttachedPropertySelector<T, has_qmlAttachedProperties<T>::value >::metaObject();
     }
 
     struct MetaTypeIds {