PPI: Allow connecting two MultiConnectorMixin modules

[senf.git] / senf / Utils / type_traits.hh

diff --git a/senf/Utils/type_traits.hh b/senf/Utils/type_traits.hh
index a728ac0..8f58122 100644 (file)
--- a/senf/Utils/type_traits.hh
+++ b/senf/Utils/type_traits.hh
@@ -243,6 +243,14 @@ namespace senf
         : public boost::remove_cv< typename boost::remove_reference<T>::type >
     {};
 
+    template < class T >
+    struct function_arity
+        : public boost::integral_constant<
+              unsigned,
+              boost::function_traits<
+                  typename senf::remove_any_pointer<T>::type>::arity>
+    {};
+
   ///}
 
 #ifndef DOXYGEN