interop with boost::intrusive_ptr

Author: jll63

include/boost/openmethod/interop/boost_intrusive_ptr.hpp

@@ -48,7 +48,10 @@ struct virtual_traits<boost::intrusive_ptr<Class>, Registry> {
         using element_type = typename OverriderType::element_type;
 
         if constexpr (detail::requires_dynamic_cast<Class*, element_type*>) {
-            return boost::dynamic_pointer_cast<element_type>(obj);
+            // make it work with custom RTTI
+            return OverriderType(
+                &Registry::rtti::template dynamic_cast_ref<element_type&>(
+                    *obj));
         } else {
             return boost::static_pointer_cast<element_type>(obj);
         }
@@ -98,7 +101,11 @@ struct virtual_traits<const boost::intrusive_ptr<Class>&, Registry> {
 
             if constexpr (detail::requires_dynamic_cast<
                               Class*, element_type*>) {
-                return boost::dynamic_pointer_cast<element_type>(obj);
+                // make it work with custom RTTI
+                return std::remove_const_t<
+                    std::remove_reference_t<OverriderType>>(
+                    &Registry::rtti::template dynamic_cast_ref<element_type&>(
+                        *obj));
             } else {
                 return boost::static_pointer_cast<element_type>(obj);
             }