...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::anys::any_cast
// In header: <boost/any/basic_any.hpp> template<typename ValueType, std::size_t Size, std::size_t Alignment> ValueType * any_cast(basic_any< Size, Alignment > * operand);