gistfile1.ec

   property Container<int> foo
   {
      set
      {
         BuiltInContainer<int> * array = (void *)value;
         // Use array->count and array->data
      }
      get
      {
         int count;
         BuiltInContainer<int> * array = new0 BuiltInContainer<int>[1];
         // Set array->count, allocate memory for array->data, write into array->data
         return (Container<int>)array;
      }
   }