metaparse/doc/getting_started_37.qbk
2015-09-05 16:11:18 +02:00

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[#getting_started_37]
using unary_exp3 = foldr_start_with_parser< minus_token, primary_exp3, boost::mpl::lambda<boost::mpl::negate<boost::mpl::_1>>::type >;
using mult_exp6 = foldl_start_with_parser< sequence<one_of<times_token, divides_token>, unary_exp3>, unary_exp3, boost::mpl::quote2<binary_op> >;
struct plus_exp3 : foldl_start_with_parser< sequence<one_of<plus_token, minus_token>, mult_exp6>, mult_exp6, boost::mpl::quote2<binary_op> > {};
using exp_parser20 = build_parser<plus_exp3>;