llong
// In header: <boost/parser/tuple.hpp> template<long long I> using llong = integral_constant< long long, I >;
A template alias that is boost::hana::llong<I> if BOOST_PARSER_USE_HANA_TUPLE is defined, and std::integral_constant<long long, I> otherwise.
boost::hana::llong<I>
BOOST_PARSER_USE_HANA_TUPLE
std::integral_constant<long long, I>