...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::pfr::is_reflectable<const T, WhatFor>
// In header: <boost/pfr/traits.hpp> template<typename T, typename WhatFor> struct is_reflectable<const T, WhatFor> : public boost::pfr::is_reflectable< T, WhatFor > { };