image/svg+xml
int_token
transform<sequence<...>, eval_plus>
int_token
plus_token
mpl_::integral_c<int, 13>
mpl_::integral_c<int, 11>
mpl_::integral_c<int, 2>
mpl_::char_<'+'>
boost_::mpl::vector< mpl_::integral_c<int, 11>, mpl_::char_<'+'>, mpl_::integral_c<int, 2>>
sequence<int_token, plus_token, int_token>
BOOST_METAPARSE_STRING("11 + 2")