...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_sgtree_opt — #if !defined(BOOST_INTRUSIVE_VARIADIC_TEMPLATES)
// In header: <boost/intrusive/sgtree.hpp> template<typename T, typename O1 = none, typename O2 = none, typename O3 = none, typename O4 = none> struct make_sgtree_opt { // types typedef pack_options< sg_set_defaults< T >, O1, O2, O3, O4 >::type packed_options; typedef unspecified value_traits; typedef sg_setopt< value_traits, typename packed_options::compare, typename packed_options::size_type, packed_options::floating_point > type; };