...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::hashtable_equal_holder
// In header: <boost/intrusive/hashtable.hpp> template<typename ValueTraits, typename BucketTraits, typename VoidOrKeyOfValue, typename VoidOrKeyEqual, bool LinearBuckets> struct hashtable_equal_holder { // types typedef unspecified type; };