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

Struct template typeid_

boost::type_erasure::typeid_

// In header: <boost/type_erasure/builtin.hpp>

template<typename T = _self> 
struct typeid_ {
};

Enables runtime type information. This is required if you want to use any_cast or typeid_of.

	Note
	typeid_ cannot be specialized because several library components including any_cast would not work correctly if its behavior changed. There is no need to specialize it anyway, since it works for all types. typeid_ also cannot be passed to call. To access it, use typeid_of.