For many reasons, including those I’ve already covered, JavaScript is a very popular programming language. In fact, according ...

It's possible to assign between objects of a derived class via a trivial assignment operator of the base class. As a result, it's possible to synthesize a defaulted and trivial assignment operator ...

So the question is, what's the precondition for std::any's swap and assignment operators? Should we really support those use cases, i,e. can we just compare the address directly? Even if we cannot ...