image/svg+xml
foldl_reject_incomplete_start_with_parser< plus_int, int_token, sum_op>
int_token
plus_int
plus_int
plus_int
sum_op
int_<24>
sum_op
int_<27>
sum_op
parsing withfoldl_reject_incomplete_start_with_parser< plus_int, int_token, sum_op>
int_<11> int_<13> int_<3> int_<21>
plus_int
BOOST_METAPARSE_STRING("11 + 13 + 3 + 21 +")
ERROR:missing number
ERROR:missing number