...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::binary_expr — A metafunction for generating binary expression types with a specified tag type,
a grammar element for matching binary expressions, and
a PrimitiveTransform
that dispatches to the
proto::pass_through<>
transform.
// In header: <boost/proto/traits.hpp> template<typename Tag, typename T, typename U> struct binary_expr : proto::transform< binary_expr<Tag, T, U> > { // types typedef proto::expr< Tag, proto::list2< T, U > > type; typedef proto::basic_expr< Tag, proto::list2< T, U > > proto_grammar; // member classes/structs/unions template<typename Expr, typename State, typename Data> struct impl : proto::pass_through<binary_expr>::template impl<Expr, State, Data> { }; };