ceph/src/boost/libs/histogram/test/detail_detect_test.cpp

   1 // Copyright 2015-2017 Hans Dembinski
   2 //
   3 // Distributed under the Boost Software License, Version 1.0.
   4 // (See accompanying file LICENSE_1_0.txt
   5 // or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #include <array>
   8 #include <boost/core/lightweight_test.hpp>
   9 #include <boost/core/lightweight_test_trait.hpp>
  10 #include <boost/histogram/axis/integer.hpp>
  11 #include <boost/histogram/axis/regular.hpp>
  12 #include <boost/histogram/axis/variable.hpp>
  13 #include <boost/histogram/axis/variant.hpp>
  14 #include <boost/histogram/detail/detect.hpp>
  15 #include <boost/histogram/unlimited_storage.hpp>
  16 #include <deque>
  17 #include <initializer_list>
  18 #include <map>
  19 #include <string>
  20 #include <type_traits>
  21 #include <unordered_map>
  22 #include <utility>
  23 #include <vector>
  24 #include "std_ostream.hpp"
  25 #include "throw_exception.hpp"
  26 #include "utility_allocator.hpp"
  27
  28 using namespace boost::histogram;
  29 using namespace boost::histogram::detail;
  30
  31 int main() {
  32   // has_method_value*
  33   {
  34     struct A {};
  35     struct B {
  36       A value(int) const { return {}; }
  37     };
  38     struct C {
  39       char value(int) const { return 0; }
  40     };
  41
  42     BOOST_TEST_TRAIT_FALSE((has_method_value<A>));
  43     BOOST_TEST_TRAIT_TRUE((has_method_value<B>));
  44     BOOST_TEST_TRAIT_TRUE((has_method_value<C>));
  45   }
  46
  47   // has_method_options
  48   {
  49     struct A {};
  50     struct B {
  51       void options() {}
  52     };
  53
  54     BOOST_TEST_TRAIT_FALSE((has_method_options<A>));
  55     BOOST_TEST_TRAIT_TRUE((has_method_options<B>));
  56   }
  57
  58   // has_method_metadata
  59   {
  60     struct A {};
  61     struct B {
  62       void metadata();
  63     };
  64
  65     BOOST_TEST_TRAIT_FALSE((has_method_metadata<A>));
  66     BOOST_TEST_TRAIT_TRUE((has_method_metadata<B>));
  67   }
  68
  69   // has_method_update
  70   {
  71     struct A {};
  72     struct B {
  73       void update(int) {}
  74     };
  75     using C = axis::integer<int, axis::null_type, use_default>;
  76
  77     BOOST_TEST_TRAIT_FALSE((has_method_update<A>));
  78     BOOST_TEST_TRAIT_TRUE((has_method_update<B>));
  79     BOOST_TEST_TRAIT_TRUE((has_method_update<C>));
  80   }
  81
  82   // has_method_resize
  83   {
  84     struct A {};
  85     using B = std::vector<int>;
  86     using C = std::map<int, int>;
  87
  88     BOOST_TEST_TRAIT_FALSE((has_method_resize<A>));
  89     BOOST_TEST_TRAIT_TRUE((has_method_resize<B>));
  90     BOOST_TEST_TRAIT_FALSE((has_method_resize<C>));
  91   }
  92
  93   // has_method_size
  94   {
  95     struct A {};
  96     using B = std::vector<int>;
  97     using C = std::map<int, int>;
  98
  99     BOOST_TEST_TRAIT_FALSE((has_method_size<A>));
 100     BOOST_TEST_TRAIT_TRUE((has_method_size<B>));
 101     BOOST_TEST_TRAIT_TRUE((has_method_size<C>));
 102   }
 103
 104   // has_method_clear
 105   {
 106     struct A {};
 107     using B = std::vector<int>;
 108     using C = std::map<int, int>;
 109     using D = std::array<int, 10>;
 110
 111     BOOST_TEST_TRAIT_FALSE((has_method_clear<A>));
 112     BOOST_TEST_TRAIT_TRUE((has_method_clear<B>));
 113     BOOST_TEST_TRAIT_TRUE((has_method_clear<C>));
 114     BOOST_TEST_TRAIT_FALSE((has_method_clear<D>));
 115   }
 116
 117   // has_allocator
 118   {
 119     struct A {};
 120     using B = std::vector<int>;
 121     using C = std::map<int, int>;
 122     using D = std::array<int, 10>;
 123
 124     BOOST_TEST_TRAIT_FALSE((has_method_clear<A>));
 125     BOOST_TEST_TRAIT_TRUE((has_method_clear<B>));
 126     BOOST_TEST_TRAIT_TRUE((has_method_clear<C>));
 127     BOOST_TEST_TRAIT_FALSE((has_method_clear<D>));
 128   }
 129
 130   // is_storage
 131   {
 132     struct A {};
 133     using B = std::vector<int>;
 134     using C = unlimited_storage<>;
 135
 136     BOOST_TEST_TRAIT_FALSE((is_storage<A>));
 137     BOOST_TEST_TRAIT_FALSE((is_storage<B>));
 138     BOOST_TEST_TRAIT_TRUE((is_storage<C>));
 139   }
 140
 141   // is_indexable
 142   {
 143     struct A {};
 144     using B = std::vector<int>;
 145     using C = std::map<int, int>;
 146     using D = std::map<A, int>;
 147
 148     BOOST_TEST_TRAIT_FALSE((is_indexable<A>));
 149     BOOST_TEST_TRAIT_TRUE((is_indexable<B>));
 150     BOOST_TEST_TRAIT_TRUE((is_indexable<C>));
 151     BOOST_TEST_TRAIT_FALSE((is_indexable<D>));
 152   }
 153
 154   // is_transform
 155   {
 156     struct A {};
 157     struct B {
 158       double forward(A);
 159       A inverse(double);
 160     };
 161
 162     BOOST_TEST_TRAIT_FALSE((is_transform<A, double>));
 163     BOOST_TEST_TRAIT_TRUE((is_transform<B, A>));
 164     BOOST_TEST_TRAIT_TRUE((is_transform<axis::transform::id, double>));
 165   }
 166
 167   // is_vector_like
 168   {
 169     struct A {};
 170     using B = std::vector<int>;
 171     using C = std::array<int, 10>;
 172     using D = std::map<unsigned, int>;
 173     using E = std::deque<int>;
 174     BOOST_TEST_TRAIT_FALSE((is_vector_like<A>));
 175     BOOST_TEST_TRAIT_TRUE((is_vector_like<B>));
 176     BOOST_TEST_TRAIT_FALSE((is_vector_like<C>));
 177     BOOST_TEST_TRAIT_FALSE((is_vector_like<D>));
 178     BOOST_TEST_TRAIT_TRUE((is_vector_like<E>));
 179   }
 180
 181   // is_array_like
 182   {
 183     struct A {};
 184     using B = std::vector<int>;
 185     using C = std::array<int, 10>;
 186     using D = std::map<unsigned, int>;
 187     BOOST_TEST_TRAIT_FALSE((is_array_like<A>));
 188     BOOST_TEST_TRAIT_FALSE((is_array_like<B>));
 189     BOOST_TEST_TRAIT_TRUE((is_array_like<C>));
 190     BOOST_TEST_TRAIT_FALSE((is_array_like<D>));
 191   }
 192
 193   // is_map_like
 194   {
 195     struct A {};
 196     using B = std::vector<int>;
 197     using C = std::array<int, 10>;
 198     using D = std::map<unsigned, int>;
 199     using E = std::unordered_map<unsigned, int>;
 200     BOOST_TEST_TRAIT_FALSE((is_map_like<A>));
 201     BOOST_TEST_TRAIT_FALSE((is_map_like<B>));
 202     BOOST_TEST_TRAIT_FALSE((is_map_like<C>));
 203     BOOST_TEST_TRAIT_TRUE((is_map_like<D>));
 204     BOOST_TEST_TRAIT_TRUE((is_map_like<E>));
 205   }
 206
 207   // is_axis
 208   {
 209     struct A {};
 210     struct B {
 211       int index(double);
 212       int size() const;
 213     };
 214     struct C {
 215       int index(double);
 216     };
 217     struct D {
 218       int size();
 219     };
 220     using E = axis::variant<axis::regular<>>;
 221
 222     BOOST_TEST_TRAIT_FALSE((is_axis<A>));
 223     BOOST_TEST_TRAIT_TRUE((is_axis<B>));
 224     BOOST_TEST_TRAIT_FALSE((is_axis<C>));
 225     BOOST_TEST_TRAIT_FALSE((is_axis<D>));
 226     BOOST_TEST_TRAIT_FALSE((is_axis<E>));
 227   }
 228
 229   // is_iterable
 230   {
 231     using A = std::vector<int>;
 232     using B = int[3];
 233     using C = std::initializer_list<int>;
 234     BOOST_TEST_TRAIT_FALSE((is_iterable<int>));
 235     BOOST_TEST_TRAIT_TRUE((is_iterable<A>));
 236     BOOST_TEST_TRAIT_TRUE((is_iterable<B>));
 237     BOOST_TEST_TRAIT_TRUE((is_iterable<C>));
 238   }
 239
 240   // is_streamable
 241   {
 242     struct Foo {};
 243     BOOST_TEST_TRAIT_TRUE((is_streamable<int>));
 244     BOOST_TEST_TRAIT_TRUE((is_streamable<std::string>));
 245     BOOST_TEST_TRAIT_FALSE((is_streamable<Foo>));
 246   }
 247
 248   // is_axis_variant
 249   {
 250     struct A {};
 251     BOOST_TEST_TRAIT_FALSE((is_axis_variant<A>));
 252     BOOST_TEST_TRAIT_TRUE((is_axis_variant<axis::variant<>>));
 253     BOOST_TEST_TRAIT_TRUE((is_axis_variant<axis::variant<axis::regular<>>>));
 254   }
 255
 256   // is_sequence_of_axis
 257   {
 258     using A = std::vector<axis::regular<>>;
 259     using B = std::vector<axis::variant<axis::regular<>>>;
 260     using C = std::vector<int>;
 261     auto v = std::vector<axis::variant<axis::regular<>, axis::integer<>>>();
 262     BOOST_TEST_TRAIT_TRUE((is_sequence_of_any_axis<A>));
 263     BOOST_TEST_TRAIT_TRUE((is_sequence_of_axis<A>));
 264     BOOST_TEST_TRAIT_FALSE((is_sequence_of_axis_variant<A>));
 265     BOOST_TEST_TRAIT_TRUE((is_sequence_of_any_axis<B>));
 266     BOOST_TEST_TRAIT_TRUE((is_sequence_of_axis_variant<B>));
 267     BOOST_TEST_TRAIT_FALSE((is_sequence_of_axis<B>));
 268     BOOST_TEST_TRAIT_FALSE((is_sequence_of_any_axis<C>));
 269     BOOST_TEST_TRAIT_TRUE((is_sequence_of_any_axis<decltype(v)>));
 270   }
 271
 272   // has_operator_equal
 273   {
 274     struct A {};
 275     struct B {
 276       bool operator==(const B&) const { return true; }
 277     };
 278
 279     BOOST_TEST_TRAIT_FALSE((has_operator_equal<A, A>));
 280     BOOST_TEST_TRAIT_FALSE((has_operator_equal<B, A>));
 281     BOOST_TEST_TRAIT_TRUE((has_operator_equal<B, B>));
 282     BOOST_TEST_TRAIT_TRUE((has_operator_equal<const B&, const B&>));
 283   }
 284
 285   // has_operator_radd
 286   {
 287     struct A {};
 288     struct B {
 289       B& operator+=(const B&) { return *this; }
 290     };
 291
 292     BOOST_TEST_TRAIT_FALSE((has_operator_radd<A, A>));
 293     BOOST_TEST_TRAIT_FALSE((has_operator_radd<B, A>));
 294     BOOST_TEST_TRAIT_TRUE((has_operator_radd<B, B>));
 295     BOOST_TEST_TRAIT_TRUE((has_operator_radd<B&, const B&>));
 296   }
 297
 298   return boost::report_errors();
 299 }