ceph/src/boost/libs/type_index/test/type_index_constexpr_test.cpp

   1 //
   2 // Copyright Antony Polukhin, 2015-2016.
   3 //
   4 // Distributed under the Boost Software License, Version 1.0. (See
   5 // accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7
   8 #include <boost/type_index/ctti_type_index.hpp>
   9
  10 #include <boost/lexical_cast.hpp>
  11 #include <algorithm>
  12 #include <string>
  13
  14 #include <boost/core/lightweight_test.hpp>
  15
  16 const char* hello1 = "Hello word";
  17 const char* hello1_end = hello1 + sizeof("Hello word");
  18 const char* hello2 = "Hello word, pal!";
  19 const char* hello2_end = hello2 + sizeof("Hello word, pal!");
  20
  21 void strcmp_same() {
  22     using boost::typeindex::detail::constexpr_strcmp;
  23
  24     BOOST_TEST(
  25         constexpr_strcmp(hello1, hello1) == 0
  26     );
  27
  28     BOOST_TEST(
  29         constexpr_strcmp(hello2, hello2) == 0
  30     );
  31
  32     BOOST_TEST(
  33         constexpr_strcmp(hello1, hello2) != 0
  34     );
  35
  36     BOOST_TEST(
  37         constexpr_strcmp(hello2, hello1) != 0
  38     );
  39
  40     BOOST_TEST(
  41         (constexpr_strcmp(hello2, hello1) < 0)
  42         ==
  43         (std::strcmp(hello2, hello1) < 0)
  44     );
  45
  46     BOOST_TEST(
  47         (constexpr_strcmp(hello1, hello2) < 0)
  48         ==
  49         (std::strcmp(hello1, hello2) < 0)
  50     );
  51 }
  52
  53 void search_same() {
  54     using boost::typeindex::detail::constexpr_search;
  55     BOOST_TEST(
  56         constexpr_search(hello1, hello1_end, hello2, hello2_end) == std::search(hello1, hello1_end, hello2, hello2_end)
  57     );
  58
  59     BOOST_TEST(
  60         constexpr_search(hello2, hello2_end, hello1, hello1_end) == std::search(hello2, hello2_end, hello1, hello1_end)
  61     );
  62
  63     const char* word = "word";
  64     const char* word_end = word + sizeof("word") - 1;
  65     BOOST_TEST(
  66         constexpr_search(hello1, hello1_end, word, word_end) == std::search(hello1, hello1_end, word, word_end)
  67     );
  68
  69     BOOST_TEST(
  70         constexpr_search(hello2, hello2_end, word, word_end) == std::search(hello2, hello2_end, word, word_end)
  71     );
  72 }
  73
  74 template <class T, std::size_t N>
  75 BOOST_CXX14_CONSTEXPR bool in_namespace(const char (&ns)[N]) BOOST_NOEXCEPT {
  76     BOOST_CXX14_CONSTEXPR const char* name = boost::typeindex::ctti_type_index::type_id<T>().raw_name();
  77     for (std::size_t i = 0; i < N - 1; ++i)
  78         if (name[i] != ns[i])
  79             return false;
  80
  81     return true;
  82 }
  83
  84 template <class T>
  85 BOOST_CXX14_CONSTEXPR bool is_boost_namespace() BOOST_NOEXCEPT {
  86     return in_namespace<T>("boost::") || in_namespace<T>("class boost::") || in_namespace<T>("struct boost::");
  87 }
  88
  89 void constexpr_test() {
  90     using namespace boost::typeindex;
  91
  92     BOOST_CXX14_CONSTEXPR ctti_type_index t_int0 = ctti_type_index::type_id<int>();
  93     BOOST_CXX14_CONSTEXPR ctti_type_index t_short0 = ctti_type_index::type_id<short>();
  94     BOOST_CXX14_CONSTEXPR ctti_type_index t_int1 = ctti_type_index::type_id<int>();
  95     BOOST_CXX14_CONSTEXPR ctti_type_index t_short1 = ctti_type_index::type_id<short>();
  96
  97     BOOST_CXX14_CONSTEXPR bool same0 = (t_int0 == t_int1);
  98     BOOST_TEST(same0);
  99
 100     BOOST_CXX14_CONSTEXPR bool same1 = (t_short1 == t_short0);
 101     BOOST_TEST(same1);
 102
 103     BOOST_CXX14_CONSTEXPR bool same2 = (t_int1 == t_int1);
 104     BOOST_TEST(same2);
 105
 106     BOOST_CXX14_CONSTEXPR bool same3 = (t_short0 == t_short0);
 107     BOOST_TEST(same3);
 108
 109     BOOST_CXX14_CONSTEXPR bool same4 = !(t_short0 < t_short0 || t_short0 > t_short0);
 110     BOOST_TEST(same4);
 111
 112     BOOST_CXX14_CONSTEXPR bool same5 = (t_short0 <= t_short0 && t_short0 >= t_short0);
 113     BOOST_TEST(same5);
 114
 115
 116     BOOST_CXX14_CONSTEXPR bool not_same0 = (t_int0 != t_short1);
 117     BOOST_TEST(not_same0);
 118
 119     BOOST_CXX14_CONSTEXPR bool not_same1 = (t_int1 != t_short0);
 120     BOOST_TEST(not_same1);
 121
 122     BOOST_CXX14_CONSTEXPR bool not_same2 = (t_int1 < t_short0 || t_int1 > t_short0);
 123     BOOST_TEST(not_same2);
 124
 125
 126     BOOST_CXX14_CONSTEXPR const char* int_name = t_int0.name();
 127     BOOST_TEST(*int_name != '\0');
 128
 129     BOOST_CXX14_CONSTEXPR const char* short_name = t_short0.name();
 130     BOOST_TEST(*short_name != '\0');
 131
 132     BOOST_CXX14_CONSTEXPR bool in_namespace = is_boost_namespace<ctti_type_index>();
 133     BOOST_TEST(in_namespace);
 134
 135     BOOST_CXX14_CONSTEXPR bool not_in_namespace = !is_boost_namespace<std::string>();
 136     BOOST_TEST(not_in_namespace);
 137 }
 138
 139
 140 int main() {
 141     strcmp_same();
 142     search_same();
 143     constexpr_test();
 144     return boost::report_errors();
 145 }
 146