%%cpp -d

class UponCopyPrinter {
public:
   UponCopyPrinter() = default;
   UponCopyPrinter(UponCopyPrinter &&) = default;
   UponCopyPrinter(const UponCopyPrinter &) { std::cout << "Invoking copy c'tor!" << std::endl; }
};

ROOT::RVec<UponCopyPrinter> v(3);

ROOT::RVec<UponCopyPrinter> v2(v.data(), v.size());

std::cout << v.data() << " and " << v2.data() << std::endl;

v2.push_back(UponCopyPrinter());

std::cout << v.data() << " and " << v2.data() << std::endl;