ceph/src/boost/libs/fusion/test/sequence/adapt_struct.cpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2007 Joel de Guzman
   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/detail/lightweight_test.hpp>
   8 #include <boost/fusion/adapted/struct/adapt_struct.hpp>
   9 #include <boost/fusion/sequence/intrinsic/at.hpp>
  10 #include <boost/fusion/sequence/intrinsic/size.hpp>
  11 #include <boost/fusion/sequence/intrinsic/empty.hpp>
  12 #include <boost/fusion/sequence/intrinsic/front.hpp>
  13 #include <boost/fusion/sequence/intrinsic/back.hpp>
  14 #include <boost/fusion/sequence/intrinsic/value_at.hpp>
  15 #include <boost/fusion/sequence/io/out.hpp>
  16 #include <boost/fusion/container/vector/vector.hpp>
  17 #include <boost/fusion/container/list/list.hpp>
  18 #include <boost/fusion/container/generation/make_vector.hpp>
  19 #include <boost/fusion/container/vector/convert.hpp>
  20 #include <boost/fusion/sequence/comparison/equal_to.hpp>
  21 #include <boost/fusion/sequence/comparison/not_equal_to.hpp>
  22 #include <boost/fusion/sequence/comparison/less.hpp>
  23 #include <boost/fusion/sequence/comparison/less_equal.hpp>
  24 #include <boost/fusion/sequence/comparison/greater.hpp>
  25 #include <boost/fusion/sequence/comparison/greater_equal.hpp>
  26 #include <boost/fusion/mpl.hpp>
  27 #include <boost/fusion/support/is_view.hpp>
  28 #include <boost/mpl/front.hpp>
  29 #include <boost/mpl/is_sequence.hpp>
  30 #include <boost/mpl/assert.hpp>
  31 #include <boost/static_assert.hpp>
  32 #include <iostream>
  33 #include <string>
  34
  35 namespace namespaced_type {
  36   typedef int integer;
  37 }
  38
  39 namespace ns
  40 {
  41     struct point
  42     {
  43         int x;
  44         int y;
  45         namespaced_type::integer z;
  46     };
  47
  48 #if !BOOST_WORKAROUND(__GNUC__,<4)
  49     struct point_with_private_attributes
  50     {
  51         friend struct boost::fusion::extension::access;
  52
  53     private:
  54         int x;
  55         int y;
  56         int z;
  57
  58     public:
  59         point_with_private_attributes(int x, int y, int z):x(x),y(y),z(z)
  60         {}
  61     };
  62 #endif
  63
  64     struct foo
  65     {
  66         int x;
  67     };
  68
  69     struct bar
  70     {
  71         foo foo_;
  72         int y;
  73     };
  74
  75
  76     // Testing non-constexpr compatible types
  77     struct employee {
  78       std::string name;
  79       std::string nickname;
  80
  81       employee(std::string name, std::string nickname)
  82         : name(name), nickname(nickname)
  83       {}
  84     };
  85 }
  86
  87 #if BOOST_PP_VARIADICS
  88
  89     BOOST_FUSION_ADAPT_STRUCT(
  90         ns::point,
  91         x,
  92         y,
  93         z
  94     )
  95
  96 #   if !BOOST_WORKAROUND(__GNUC__,<4)
  97     BOOST_FUSION_ADAPT_STRUCT(
  98         ns::point_with_private_attributes,
  99         x,
 100         y,
 101         z
 102     )
 103 #   endif
 104
 105     struct s { int m; };
 106     BOOST_FUSION_ADAPT_STRUCT(s, m)
 107
 108     BOOST_FUSION_ADAPT_STRUCT(
 109         ns::bar,
 110         foo_.x, // test that adapted members can actually be expressions
 111         (auto , y)
 112     )
 113
 114     BOOST_FUSION_ADAPT_STRUCT(
 115         ns::employee,
 116         name,
 117         nickname
 118     )
 119
 120
 121 #else // BOOST_PP_VARIADICS
 122
 123     BOOST_FUSION_ADAPT_STRUCT(
 124         ns::point,
 125         (int, x)
 126         (auto, y)
 127         (namespaced_type::integer, z)
 128     )
 129
 130 #   if !BOOST_WORKAROUND(__GNUC__,<4)
 131     BOOST_FUSION_ADAPT_STRUCT(
 132         ns::point_with_private_attributes,
 133         (int, x)
 134         (int, y)
 135         (auto, z)
 136     )
 137 #   endif
 138
 139     struct s { int m; };
 140     BOOST_FUSION_ADAPT_STRUCT(s, (auto, m))
 141
 142     BOOST_FUSION_ADAPT_STRUCT(
 143         ns::bar,
 144         (auto, foo_.x) // test that adapted members can actually be expressions
 145         (BOOST_FUSION_ADAPT_AUTO, y) // Mixing auto & BOOST_FUSION_ADAPT_AUTO
 146                                      // to test backward compatibility
 147     )
 148
 149     BOOST_FUSION_ADAPT_STRUCT(
 150         ns::employee,
 151         (std::string, name)
 152         (BOOST_FUSION_ADAPT_AUTO, nickname)
 153     )
 154
 155 #endif
 156
 157 struct empty_struct {};
 158 BOOST_FUSION_ADAPT_STRUCT(empty_struct,)
 159
 160 int
 161 main()
 162 {
 163     using namespace boost::fusion;
 164     using namespace boost;
 165     using ns::point;
 166
 167     std::cout << tuple_open('[');
 168     std::cout << tuple_close(']');
 169     std::cout << tuple_delimiter(", ");
 170
 171     {
 172         BOOST_MPL_ASSERT_NOT((traits::is_view<point>));
 173         point p = {123, 456, 789};
 174
 175         std::cout << at_c<0>(p) << std::endl;
 176         std::cout << at_c<1>(p) << std::endl;
 177         std::cout << at_c<2>(p) << std::endl;
 178         std::cout << p << std::endl;
 179         BOOST_TEST(p == make_vector(123, 456, 789));
 180
 181         at_c<0>(p) = 6;
 182         at_c<1>(p) = 9;
 183         at_c<2>(p) = 12;
 184         BOOST_TEST(p == make_vector(6, 9, 12));
 185
 186         BOOST_STATIC_ASSERT(boost::fusion::result_of::size<point>::value == 3);
 187         BOOST_STATIC_ASSERT(!boost::fusion::result_of::empty<point>::value);
 188
 189         BOOST_TEST(front(p) == 6);
 190         BOOST_TEST(back(p) == 12);
 191     }
 192
 193     {
 194         vector<int, float, int> v1(4, 2.f, 2);
 195         point v2 = {5, 3, 3};
 196         vector<long, double, int> v3(5, 4., 4);
 197         BOOST_TEST(v1 < v2);
 198         BOOST_TEST(v1 <= v2);
 199         BOOST_TEST(v2 > v1);
 200         BOOST_TEST(v2 >= v1);
 201         BOOST_TEST(v2 < v3);
 202         BOOST_TEST(v2 <= v3);
 203         BOOST_TEST(v3 > v2);
 204         BOOST_TEST(v3 >= v2);
 205     }
 206
 207     {
 208         // conversion from point to vector
 209         point p = {5, 3, 3};
 210         vector<int, long, int> v(p);
 211         v = p;
 212     }
 213
 214     {
 215         // conversion from point to list
 216         point p = {5, 3, 3};
 217         list<int, long, int> l(p);
 218         l = p;
 219     }
 220
 221     { // begin/end
 222         using namespace boost::fusion;
 223         using boost::is_same;
 224
 225         typedef boost::fusion::result_of::begin<s>::type b;
 226         typedef boost::fusion::result_of::end<s>::type e;
 227         // this fails
 228         BOOST_MPL_ASSERT((is_same<boost::fusion::result_of::next<b>::type, e>));
 229     }
 230
 231     {
 232         BOOST_MPL_ASSERT((mpl::is_sequence<ns::point>));
 233         BOOST_MPL_ASSERT((boost::is_same<
 234             boost::fusion::result_of::value_at_c<ns::point,0>::type
 235           , mpl::front<ns::point>::type>));
 236     }
 237
 238 #if !BOOST_WORKAROUND(__GNUC__,<4)
 239     {
 240         ns::point_with_private_attributes p(123, 456, 789);
 241
 242         std::cout << at_c<0>(p) << std::endl;
 243         std::cout << at_c<1>(p) << std::endl;
 244         std::cout << at_c<2>(p) << std::endl;
 245         std::cout << p << std::endl;
 246         BOOST_TEST(p == make_vector(123, 456, 789));
 247     }
 248 #endif
 249
 250     {
 251         fusion::vector<int, float> v1(4, 2.f);
 252         ns::bar v2 = {{5}, 3};
 253         BOOST_TEST(v1 < v2);
 254         BOOST_TEST(v1 <= v2);
 255         BOOST_TEST(v2 > v1);
 256         BOOST_TEST(v2 >= v1);
 257     }
 258
 259     {
 260         ns::employee emp("John Doe", "jdoe");
 261         std::cout << at_c<0>(emp) << std::endl;
 262         std::cout << at_c<1>(emp) << std::endl;
 263
 264         fusion::vector<std::string, std::string> v1("John Doe", "jdoe");
 265         BOOST_TEST(emp == v1);
 266     }
 267
 268     return boost::report_errors();
 269 }
 270