Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
This is an older version of Boost and was released in 2024. The current version is 1.89.0.
hash_assoc_options_t
// In header: <boost/container/options.hpp> typedef typename boost::container::hash_assoc_options< Options... >::type hash_assoc_options_t;