boost::proto::multiplies_assign — 用于生成 multiplies-assign 表达式类型,匹配 multiplies-assign 表达式的语法元素,以及一个分派到 proto::pass_through<>
转换的 PrimitiveTransform 的元函数。
// In header: <boost/proto/traits.hpp> template<typename T, typename U> struct multiplies_assign : proto::transform< multiplies_assign<T, U> > { // types typedef proto::expr< proto::tag::multiplies_assign, proto::list2< T, U > > type; typedef proto::basic_expr< proto::tag::multiplies_assign, proto::list2< T, U > > proto_grammar; // member classes/structs/unions template<typename Expr, typename State, typename Data> struct impl : proto::pass_through<multiplies_assign>::template impl<Expr, State, Data> { }; };