ceph/src/boost/libs/spirit/test/qi/regression_reorder.cpp

   1 //  Copyright (c) 2010 Olaf Peter
   2 //  Copyright (c) 2001-2010 Hartmut Kaiser
   3 //
   4 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
   5 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #include <boost/spirit/include/qi_operator.hpp>
   8 #include <boost/spirit/include/qi_char.hpp>
   9 #include <boost/spirit/include/qi_string.hpp>
  10 #include <boost/spirit/include/qi_numeric.hpp>
  11 #include <boost/spirit/include/qi_directive.hpp>
  12 #include <boost/spirit/include/qi_nonterminal.hpp>
  13
  14 #include <boost/core/lightweight_test.hpp>
  15 #include <boost/fusion/include/nview.hpp>
  16
  17 namespace qi = boost::spirit::qi;
  18 namespace ascii = boost::spirit::ascii;
  19 namespace fusion = boost::fusion;
  20 namespace mpl = boost::mpl;
  21
  22 int main()
  23 {
  24     using fusion::result_of::as_nview;
  25     using fusion::at_c;
  26     using boost::optional;
  27     using boost::variant;
  28     using ascii::space_type;
  29     using ascii::no_case;
  30     using qi::lit;
  31     using qi::double_;
  32
  33     typedef fusion::vector<
  34         optional<double>,    // 0 - U
  35         optional<double>,    // 1 - V
  36         optional<double>     // 2 - W
  37     > uvw_type;
  38
  39     typedef as_nview<uvw_type, 0, 1, 2>::type uvw_reordered_type;
  40     typedef as_nview<uvw_type, 2, 0, 1>::type vwu_reordered_type;
  41
  42     typedef char const* iterator_type;
  43
  44     qi::rule<iterator_type, optional<double>(), space_type> u,v,w;
  45     qi::rule<iterator_type, uvw_reordered_type(), space_type> uvw;
  46     qi::rule<iterator_type, vwu_reordered_type(), space_type> vwu;
  47
  48     u = no_case[ "NA" ] | ( double_ >> -lit( "U" ) );
  49     v = no_case[ "NA" ] | ( double_ >> -lit( "V" ) );
  50     w = no_case[ "NA" ] | ( double_ >> -lit( "W" ) );
  51
  52     uvw = u > v > w;
  53     vwu = v > w > u;
  54
  55     uvw_type uvw_data;
  56     {
  57         iterator_type first = "1U 2V 3W";
  58         iterator_type last  = first + std::strlen(first);
  59
  60         uvw_reordered_type uvw_result( uvw_data );
  61
  62         BOOST_TEST(qi::phrase_parse(first, last, uvw, ascii::space, uvw_result));
  63         BOOST_TEST(fusion::at_c<0>(uvw_result) && *fusion::at_c<0>(uvw_result) == 1);
  64         BOOST_TEST(fusion::at_c<1>(uvw_result) && *fusion::at_c<1>(uvw_result) == 2);
  65         BOOST_TEST(fusion::at_c<2>(uvw_result) && *fusion::at_c<2>(uvw_result) == 3);
  66     }
  67
  68     {
  69         iterator_type first = "2V 3W 1U";
  70         iterator_type last  = first + std::strlen(first);
  71
  72         vwu_reordered_type uvw_result(uvw_data);
  73
  74         BOOST_TEST(qi::phrase_parse(first, last, vwu, ascii::space, uvw_result));
  75         BOOST_TEST(fusion::at_c<0>(uvw_result) && *fusion::at_c<0>(uvw_result) == 2);
  76         BOOST_TEST(fusion::at_c<1>(uvw_result) && *fusion::at_c<1>(uvw_result) == 3);
  77         BOOST_TEST(fusion::at_c<2>(uvw_result) && *fusion::at_c<2>(uvw_result) == 1);
  78     }
  79
  80     return boost::report_errors();
  81 }
  82
  83