In this case, I think it's a typo, and should be std::is_integral: https://en.cppreference.com/w/cpp/types/is_integral https://en.cppreference.com/w/cpp/types/

In this case, I think it's a typo, and should be std::is_integral: https://en.cppreference.com/w/cpp/types/is_integral https://en.cppreference.com/w/cpp/types/is_integral