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- // Copyright (c) 2010 Olaf Peter
- // Copyright (c) 2001-2010 Hartmut Kaiser
- //
- // Distributed under the Boost Software License, Version 1.0. (See accompanying
- // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- #include <boost/detail/lightweight_test.hpp>
- #include <boost/spirit/include/qi_operator.hpp>
- #include <boost/spirit/include/qi_char.hpp>
- #include <boost/spirit/include/qi_string.hpp>
- #include <boost/spirit/include/qi_numeric.hpp>
- #include <boost/spirit/include/qi_directive.hpp>
- #include <boost/spirit/include/qi_nonterminal.hpp>
- #include <boost/fusion/include/nview.hpp>
- namespace qi = boost::spirit::qi;
- namespace ascii = boost::spirit::ascii;
- namespace fusion = boost::fusion;
- namespace mpl = boost::mpl;
- int main()
- {
- using fusion::result_of::as_nview;
- using fusion::at_c;
- using boost::optional;
- using boost::variant;
- using ascii::space_type;
- using ascii::no_case;
- using qi::lit;
- using qi::double_;
- typedef fusion::vector<
- optional<double>, // 0 - U
- optional<double>, // 1 - V
- optional<double> // 2 - W
- > uvw_type;
- typedef as_nview<uvw_type, 0, 1, 2>::type uvw_reordered_type;
- typedef as_nview<uvw_type, 2, 0, 1>::type vwu_reordered_type;
- typedef char const* iterator_type;
- qi::rule<iterator_type, optional<double>(), space_type> u,v,w;
- qi::rule<iterator_type, uvw_reordered_type(), space_type> uvw;
- qi::rule<iterator_type, vwu_reordered_type(), space_type> vwu;
- u = no_case[ "NA" ] | ( double_ >> -lit( "U" ) );
- v = no_case[ "NA" ] | ( double_ >> -lit( "V" ) );
- w = no_case[ "NA" ] | ( double_ >> -lit( "W" ) );
- uvw = u > v > w;
- vwu = v > w > u;
- uvw_type uvw_data;
- {
- iterator_type first = "1U 2V 3W";
- iterator_type last = first + std::strlen(first);
- uvw_reordered_type uvw_result( uvw_data );
- BOOST_TEST(qi::phrase_parse(first, last, uvw, ascii::space, uvw_result));
- BOOST_TEST(fusion::at_c<0>(uvw_result) && *fusion::at_c<0>(uvw_result) == 1);
- BOOST_TEST(fusion::at_c<1>(uvw_result) && *fusion::at_c<1>(uvw_result) == 2);
- BOOST_TEST(fusion::at_c<2>(uvw_result) && *fusion::at_c<2>(uvw_result) == 3);
- }
- {
- iterator_type first = "2V 3W 1U";
- iterator_type last = first + std::strlen(first);
- vwu_reordered_type uvw_result(uvw_data);
- BOOST_TEST(qi::phrase_parse(first, last, vwu, ascii::space, uvw_result));
- BOOST_TEST(fusion::at_c<0>(uvw_result) && *fusion::at_c<0>(uvw_result) == 2);
- BOOST_TEST(fusion::at_c<1>(uvw_result) && *fusion::at_c<1>(uvw_result) == 3);
- BOOST_TEST(fusion::at_c<2>(uvw_result) && *fusion::at_c<2>(uvw_result) == 1);
- }
- return boost::report_errors();
- }
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