...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::interprocess::unordered_map_index_aux::hasher
// In header: <boost/interprocess/indexes/unordered_map_index.hpp> struct hasher { // public member functions std::size_t operator()(const key_type &) const; };