...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::intrusive::make_hashtable_opt — #if !defined(BOOST_INTRUSIVE_VARIADIC_TEMPLATES)
// In header: <boost/intrusive/hashtable.hpp> template<typename T, bool UniqueKeys, typename O1 = none, typename O2 = none, typename O3 = none, typename O4 = none, typename O5 = none, typename O6 = none, typename O7 = none, typename O8 = none, typename O9 = none, typename O10 = none> struct make_hashtable_opt { // types typedef pack_options< uset_defaults< T >, O1, O2, O3, O4, O5, O6, O7, O8, O9, O10 >::type packed_options; typedef unspecified value_traits; typedef unspecified real_value_traits; typedef packed_options::bucket_traits specified_bucket_traits; typedef unspecified slist; typedef unspecified real_bucket_traits; typedef unspecified type; static const bool external_value_traits; };