...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::icl::inter_section
// In header: <boost/icl/functors.hpp> template<typename Type> struct inter_section : public boost::icl::identity_based_inplace_combine< Type > { // types typedef boost::mpl::if_< has_set_semantics< Type >, icl::inplace_et< Type >, icl::inplace_plus< Type > >::type type; // public member functions void operator()(Type &, const Type &) const; };