#include <boost/config.hpp>
#include <boost/type_traits/is_base_and_derived.hpp>
#include <boost/multi_index/member.hpp>

struct marker{};

template<typename T>
struct is_marked
{
  BOOST_STATIC_CONSTANT(bool,value=(boost::is_base_and_derived<marker,T>::value));
};

struct foo
{
  int x;
};

struct bar:private marker
{
};

typedef is_marked<int> type1;
typedef is_marked<boost::multi_index::member<foo,int,&foo::x> > type2;
typedef is_marked<bar> type3;

int main()
{
  bool b1=type1::value;
  bool b2=type2::value;
  bool b3=type3::value;
  return 0;
}