...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::static_cast_
// In header: <boost/xpressive/regex_actions.hpp> template<typename X2_0, typename A0> unspecified static_cast_(A0 const & a0);