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 2019. The current version is 1.89.0.
boost::type_erasure::equality_comparable
// In header: <boost/type_erasure/operators.hpp> template<typename T = _self, typename U = T> struct equality_comparable { // public static functions static bool apply(const T &, const U &); };