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
boost::interprocess::rbtree_best_fit::SizeHolder
// In header: <boost/interprocess/mem_algo/rbtree_best_fit.hpp> struct SizeHolder { std::size_t m_prev_size; std::size_t m_size; std::size_t m_prev_allocated; std::size_t m_allocated; };