...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_unordered_multiset
// In header: <boost/intrusive/unordered_set.hpp> template<typename T, class... Options> struct make_unordered_multiset { // types typedef implementation_defined type; };
Helper metafunction to define an unordered_multiset
that yields to the same type when the same options (either explicitly or implicitly) are used.