...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::container::pmr::multiset_of
// In header: <boost/container/pmr/set.hpp> template<typename Key, typename Compare = std::less<Key>, typename Options = void> struct multiset_of { // types typedef boost::container::multiset< Key, Compare, polymorphic_allocator< Key >, Options > type; };