...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::proto::transform_impl
// In header: <boost/proto/transform/impl.hpp> template<typename Expr, typename State, typename Data> struct transform_impl { // types typedef typename boost::remove_reference<Expr const>::type expr; typedef typename boost::add_reference<Expr const>::type expr_param; typedef typename boost::remove_reference<State const>::type state; typedef typename boost::add_reference<State const>::type state_param; typedef typename boost::remove_reference<Data const>::type data; typedef typename boost::add_reference<Data const>::type data_param; };