diff --git a/libsrc/core/utils.hpp b/libsrc/core/utils.hpp
index d072be47..ac14f883 100644
--- a/libsrc/core/utils.hpp
+++ b/libsrc/core/utils.hpp
@@ -168,6 +168,28 @@ namespace ngcore
       return current;
   }
 
+  
+
+  
+  template <int N> using IC = std::integral_constant<int,N>;  // needed for Iterate
+  
+  template <int NUM, typename FUNC>
+  NETGEN_INLINE void Iterate (FUNC f)
+  {
+    if constexpr (NUM > 1) Iterate<NUM-1> (f);
+  if constexpr (NUM >= 1) f(IC<NUM-1>());
+  }
+  
+  
+  template <int NUM, typename FUNC>
+  NETGEN_INLINE void Switch (size_t nr, FUNC f)
+  {
+    if (NUM-1 == nr) f(IC<NUM-1>());
+    if constexpr (NUM > 1) Switch<NUM-1> (nr, f);
+  }
+  
+  
+  
   namespace detail
   {
     template<typename T>