What you wrote there is just an unsafe way to do std::variant. This has nothing to do with what the blog post is about.
The blog is about Open polymorphism. Where the list of compatible Object can be extended dynamically (Which is handy for some type of error report for instance).
You can do that since forever in C++ (Since the first support for inheritance), the only thing std::polymorphism brings is the ability to do it without dynamic allocations, emplacement new or lifetime problems.
The blog is about Open polymorphism. Where the list of compatible Object can be extended dynamically (Which is handy for some type of error report for instance).
You can do that since forever in C++ (Since the first support for inheritance), the only thing std::polymorphism brings is the ability to do it without dynamic allocations, emplacement new or lifetime problems.