1[#getting_started_39] 2 3 #include <boost/metaparse/foldl_reject_incomplete_start_with_parser.hpp> 4 struct plus_exp5 : foldl_reject_incomplete_start_with_parser< sequence<one_of<plus_token, minus_token>, mult_exp6>, mult_exp6, boost::mpl::quote2<binary_op> > {}; 5 using exp_parser22 = build_parser<plus_exp5>; 6 7