That default changes in C++11: https://en.cppreference.com/w/cpp/language/copy_elision https://en.cppreference.com/w/cpp/language/copy_elision The logic around

That default changes in C++11: https://en.cppreference.com/w/cpp/language/copy_elision https://en.cppreference.com/w/cpp/language/copy_elision The logic around it is still pretty complicated, since we’re talking about C++.