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
This is an older version of Boost and was released in 2018. The current version is 1.90.0.
boost::type_erasure::bad_any_cast
// In header: <boost/type_erasure/exception.hpp> class bad_any_cast : public bad_cast { };