...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::range_adaptor_closure
// In header: <boost/stl_interfaces/view_adaptor.hpp> template<typename D, typename> struct range_adaptor_closure { // types typedef int inheritance_tag_with_an_unlikely_name_; };
A backwards-compatible implementation of C++23's std::ranges::range_adaptor_closure
. range_adaptor_closure
may be a struct template or may be an alias, as required to maintain compatability with the standard library's view adaptors.