Use dynamic_cast to support Collection as virtual base class

diff --git a/source/collection.h b/source/collection.h
index 5f0650c6761043977e85a33e55c6854d25b1703f..174c7fcabce52812083a7d8184670d2b24eda32e 100644 (file)
--- a/source/collection.h
+++ b/source/collection.h
@@ -380,7 +380,7 @@ private:
                Creator(FuncPtr f): func(f) { }
 
                virtual T *create(Collection &coll, const std::string &name) const
-               { return (static_cast<C &>(coll).*func)(name); }
+               { return (dynamic_cast<C &>(coll).*func)(name); }
        };
 
        template<typename B>