...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::xpressive::op::insert::result<This(Cont, Size, A0, A1), typename enable_if< is_integral< UNCVREF(Size)> >::type>
// In header: <boost/xpressive/regex_actions.hpp> template<typename This, typename Cont, typename Size, typename A0, typename A1> struct result<This(Cont, Size, A0, A1), typename enable_if< is_integral< UNCVREF(Size)> >::type> { // public member functions typedef UNREF(Cont) ; };