...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,Value),void>
template<typename This, typename Cont, typename Value> struct result<This(Cont, Value), void> { // types typedef char yes_type; typedef char(& no_type; typedef mpl::if_c< is_iterator, typename cont_type::iterator, std::pair< typename cont_type::iterator, bool > >::type type; // public member functions typedef UNREF(Cont) ; typedef UNREF(Value) ; BOOST_STATIC_CONSTANT(bool, is_iterator = (sizeof(yes_type)==sizeof(check_insert_return(scont_.insert(svalue_))))) ; // public static functions static yes_type check_insert_return(typename cont_type::iterator) ; static no_type check_insert_return(std::pair< typename cont_type::iterator, bool >) ; static cont_type & scont_; static value_type & svalue_; };