boost::proto::result_of::right — A metafunction that returns the type of the right child of a binary Proto expression.
template<typename Expr> struct right : proto::result_of::child_c< Expr, 1 > { };
proto::result_of::right<Expr> is equivalent to proto::result_of::child_c<Expr, 1>.
proto::result_of::right<Expr>
proto::result_of::child_c<Expr, 1>