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 2020. The current version is 1.90.0.
boost::stl_interfaces::v1::v1_dtl::ra_iter
// In header: <boost/stl_interfaces/iterator_interface.hpp> template<typename Iterator, typename = void> struct ra_iter : public false_type { };