C++ already has (named) return value optimization; I think the behavior you describe would happen when passing the result of a function to push_back/emplace_bac

C++ already has (named) return value optimization; I think the behavior you describe would happen when passing the result of a function to push_back/emplace_back. https://en.cppreference.com/w/cpp/language/copy_elision https://en.cppreference.com/w/cpp/language/copy_elision