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Самый простой пример | Код | #include <boost/config/warning_disable.hpp>
#include <boost/spirit/include/qi.hpp>
#include <iostream>
#include <string>
template <typename Iterator>
bool parse_numbers(Iterator first, Iterator last) {
bool result = boost::spirit::qi::phrase_parse(
first,
last,
boost::spirit::qi::double_
[
[](double val) {std::cout << val << "\n";} // LAMBDA!!!
],
boost::spirit::ascii::space
);
if (first != last)
return false;
return result;
}
int main(int argc, char* argv[]) {
std::string str = "1234";
if (parse_numbers(str.begin(), str.end())) {
std::cout << "OK" << std::endl;
} else {
std::cout << "FAIL" << std::endl;
}
return 0;
}
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получаем | Цитата | In file included from boost/spirit/home/qi/action/action.hpp:21:0,
from boost/spirit/home/qi/action.hpp:14,
from boost/spirit/home/qi.hpp:14,
from boost/spirit/include/qi.hpp:16,
from source.cpp:3:
boost/spirit/home/support/action_dispatch.hpp: In member function 'bool boost::spirit::traits::action_dispatch<Component>::operator()(const F&, Attribute&, Context&) [with F = parse_numbers(Iterator, Iterator) [with Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char> >]::<lambda(double)>, Attribute = double, Context = const boost::fusion::unused_type, Component = boost::spirit::qi::real_parser_impl<double, boost::spirit::qi::real_policies<double> >]':
boost/spirit/home/qi/action/action.hpp:67:17: instantiated from 'bool boost::spirit::qi::action<Subject, Action>::parse(Iterator&, const Iterator&, Context&, const Skipper&, Attribute&) const [with Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char> >, Context = const boost::fusion::unused_type, Skipper = boost::spirit::qi::char_class<boost::spirit::tag::char_code<boost::spirit::tag::space, boost::spirit::char_encoding::ascii> >, Attribute = const boost::fusion::unused_type, Subject = boost::spirit::qi::real_parser_impl<double, boost::spirit::qi::real_policies<double> >, Action = parse_numbers(Iterator, Iterator) [with Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char> >]::<lambda(double)>]'
boost/spirit/home/qi/detail/parse.hpp:84:13: instantiated from 'static bool boost::spirit::qi::detail::phrase_parse_impl<Expr, typename boost::enable_if<boost::spirit::traits::matches<boost::spirit::qi::domain, Expr> >::type>::call(Iterator&, Iterator, const Expr&, const Skipper&, boost::spirit::qi::skip_flag) [with Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char> >, Skipper = boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<boost::spirit::tag::char_code<boost::spirit::tag::space, boost::spirit::char_encoding::ascii> >, 0l>, Expr = boost::proto::exprns_::expr<boost::proto::tag::subscript, boost::proto::argsns_::list2<const boost::spirit::terminal<boost::spirit::tag::double_>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const parse_numbers(Iterator, Iterator) [with Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char> >]::<lambda(double)>&>, 0l> >, 2l>]'
boost/spirit/home/qi/parse.hpp:100:50: instantiated from 'bool boost::spirit::qi::phrase_parse(Iterator&, Iterator, const Expr&, const Skipper&, boost::spirit::qi::skip_flag) [with Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char> >, Expr = boost::proto::exprns_::expr<boost::proto::tag::subscript, boost::proto::argsns_::list2<const boost::spirit::terminal<boost::spirit::tag::double_>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<const parse_numbers(Iterator, Iterator) [with Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char> >]::<lambda(double)>&>, 0l> >, 2l>, Skipper = boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<boost::spirit::tag::char_code<boost::spirit::tag::space, boost::spirit::char_encoding::ascii> >, 0l>]'
source.cpp:18:49: instantiated from 'bool parse_numbers(Iterator, Iterator) [with Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char> >]'
source.cpp:26:43: instantiated from here
boost/spirit/home/support/action_dispatch.hpp:29:13: error: no match for call to '(const parse_numbers(Iterator, Iterator) [with Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char> >]::<lambda(double)>) (double&, const boost::fusion::unused_type&, bool&)'
source.cpp:15:62: note: candidate is: parse_numbers(Iterator, Iterator) [with Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char> >]::<lambda(double)>
Build finished with errors |
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boost::spirit::qi semantic action и c++0x лямбда, как корректно передать лямбу в action 
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