...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::stl_interfaces::adaptor
// In header: <boost/stl_interfaces/view_adaptor.hpp> template<typename F> struct adaptor { // public member functions adaptor(F); template<typename... Args> constexpr auto operator()(Args &&...) const; };