Header <tuple> implementation status Reference Implementation : Cannot implement with language itself. Need compiler support. Used C++ N STL : Partially implemented with C++ N : Fully implemented with C++ N : Not yet implemented Features Standard Implemented in Includes <compare> Classes tuple tuple_size tuple_element ss::tuple_size<ss::tuple> ss::tuple_element<ss::tuple> ss::uses_allocator<ss::tuple> Constants ignore Functions make_tuple tie forward_as_tuple tuple_cat ss::get(ss::tuple) operator== operator!= operator< operator<= operator> operator>= operator<=> ss::swap(ss::tuple) apply make_from_tuple