...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::move_upd::enable_defdel_call
// In header: <boost/move/default_delete.hpp> template<typename U, typename T, typename Type = bmupmu::nat> struct enable_defdel_call : public boost::move_upd::enable_def_del< U, T, Type > { };