...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::pointer_has_rebind_other::any
// In header: <boost/intrusive/pointer_rebind.hpp> template<typename V> struct any { // construct/copy/destruct any(const V &); };