libstdc++-v3/testsuite/20_util/is_swappable/value.h

   1 // Copyright (C) 2015-2021 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8 //
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 #include <type_traits>
  19 #include <testsuite_tr1.h>
  20 #include <utility>
  21 #include <array>
  22 #include <tuple>
  23 #include <queue>
  24 #include <stack>
  25
  26 #if defined(test_std_is_swappable)
  27 #  ifndef __cpp_lib_is_swappable
  28 #   error "Feature-test macro for is_swappable missing"
  29 #  elif __cpp_lib_is_swappable != 201603
  30 #   error "Feature-test macro for is_swappable has wrong value"
  31 #  endif
  32 // Test std::is_swappable:
  33 template<class T>
  34 using is_swappable = std::is_swappable<T>;
  35 #elif defined(test_std_is_swappable_ext)
  36 // Test our __is_swappable extension:
  37 template<class T>
  38 using is_swappable = std::__is_swappable<T>;
  39 #else
  40 # error "Either test_std_is_swappable or test_std_is_swappable_ext" \
  41         "need to be defined"
  42 #endif
  43
  44 namespace funny {
  45   struct F {};
  46   void swap(F&, F&) = delete;
  47   void swap(F(&)[5], F(&)[5]);
  48
  49   struct F2
  50   {
  51     friend void swap(F2&, F2&) = delete;
  52   };
  53
  54   struct F3
  55   {
  56     friend void swap(F3&, F3) {}
  57   };
  58 }
  59 void test01()
  60 {
  61   using namespace __gnu_test;
  62   // Positive tests.
  63   static_assert(test_property<is_swappable, int>(true), "");
  64   static_assert(test_property<is_swappable, bool>(true), "");
  65   static_assert(test_property<is_swappable, decltype(nullptr)>(true), "");
  66   static_assert(test_property<is_swappable, int&>(true), "");
  67   static_assert(test_property<is_swappable, int&&>(true), "");
  68   static_assert(test_property<is_swappable, int[1]>(true), "");
  69   static_assert(test_property<is_swappable, int[1][2]>(true), "");
  70   static_assert(test_property<is_swappable, int[1][2][3]>(true), "");
  71   static_assert(test_property<is_swappable, int(&)[1]>(true), "");
  72   static_assert(test_property<is_swappable, funny::F[5]>(true), "");
  73   static_assert(test_property<is_swappable, funny::F3>(true), "");
  74   static_assert(test_property<is_swappable, funny::F3[1]>(true), "");
  75   static_assert(test_property<is_swappable, funny::F3[1][2]>(true), "");
  76   static_assert(test_property<is_swappable, funny::F3[1][2][3]>(true), "");
  77   static_assert(test_property<is_swappable,
  78     ThrowCopyConsClass>(true), "");
  79   static_assert(test_property<is_swappable, EnumType>(true), "");
  80   static_assert(test_property<is_swappable, PODType>(true), "");
  81   static_assert(test_property<is_swappable, UnionType>(true), "");
  82   static_assert(test_property<is_swappable, construct::SE>(true), "");
  83   static_assert(test_property<is_swappable, construct::Empty>(true), "");
  84   static_assert(test_property<is_swappable, void*>(true), "");
  85   static_assert(test_property<is_swappable, int const*>(true), "");
  86   static_assert(test_property<is_swappable, ClassType*>(true), "");
  87   static_assert(test_property<is_swappable, int ClassType::*>(true), "");
  88   static_assert(test_property<is_swappable,
  89     void (ClassType::*)()>(true), "");
  90   static_assert(test_property<is_swappable,
  91     construct::Nontrivial>(true), "");
  92   static_assert(test_property<is_swappable, construct::Any>(true), "");
  93   static_assert(test_property<is_swappable, construct::nAny>(true), "");
  94   static_assert(test_property<is_swappable,
  95                 std::pair<int, int>>(true), "");
  96   static_assert(test_property<is_swappable,
  97                 std::pair<int, int>[1]>(true), "");
  98   static_assert(test_property<is_swappable,
  99                 std::pair<int, int>[1][2]>(true), "");
 100   static_assert(test_property<is_swappable,
 101                 std::pair<int, int>[1][2][3]>(true), "");
 102   static_assert(test_property<is_swappable,
 103                 std::pair<construct::Nontrivial, construct::Nontrivial>>(true), "");
 104   static_assert(test_property<is_swappable,
 105                 std::tuple<int>>(true), "");
 106   static_assert(test_property<is_swappable,
 107                 std::tuple<int>[1]>(true), "");
 108   static_assert(test_property<is_swappable,
 109                 std::tuple<int>[1][2]>(true), "");
 110   static_assert(test_property<is_swappable,
 111                 std::tuple<int>[1][2][3]>(true), "");
 112   static_assert(test_property<is_swappable,
 113                 std::tuple<>>(true), "");
 114   static_assert(test_property<is_swappable,
 115                 std::tuple<>[1]>(true), "");
 116   static_assert(test_property<is_swappable,
 117                 std::tuple<>[1][2]>(true), "");
 118   static_assert(test_property<is_swappable,
 119                 std::tuple<>[1][2][3]>(true), "");
 120   static_assert(test_property<is_swappable,
 121                 std::tuple<construct::Nontrivial>>(true), "");
 122   static_assert(test_property<is_swappable,
 123                 std::array<int, 1>>(true), "");
 124   static_assert(test_property<is_swappable,
 125                 std::array<int, 1>[1]>(true), "");
 126   static_assert(test_property<is_swappable,
 127                 std::array<int, 1>[1][2]>(true), "");
 128   static_assert(test_property<is_swappable,
 129                 std::array<int, 1>[1][2][3]>(true), "");
 130   static_assert(test_property<is_swappable,
 131                 std::array<construct::Nontrivial, 1>>(true), "");
 132   static_assert(test_property<is_swappable,
 133         std::array<int, 0>>(true), "");
 134   static_assert(test_property<is_swappable,
 135         std::array<construct::DelCopy, 0>>(true), "");
 136   static_assert(test_property<is_swappable,
 137                 std::queue<int>>(true), "");
 138   static_assert(test_property<is_swappable,
 139                 std::queue<int>[1]>(true), "");
 140   static_assert(test_property<is_swappable,
 141                 std::queue<int>[1][2]>(true), "");
 142   static_assert(test_property<is_swappable,
 143                 std::queue<int>[1][2][3]>(true), "");
 144   static_assert(test_property<is_swappable,
 145                 std::queue<construct::Nontrivial>>(true), "");
 146   static_assert(test_property<is_swappable,
 147                 std::priority_queue<int>>(true), "");
 148   static_assert(test_property<is_swappable,
 149                 std::priority_queue<int>[1]>(true), "");
 150   static_assert(test_property<is_swappable,
 151                 std::priority_queue<int>[1][2]>(true), "");
 152   static_assert(test_property<is_swappable,
 153                 std::priority_queue<int>[1][2][3]>(true), "");
 154   static_assert(test_property<is_swappable,
 155                 std::priority_queue<construct::Nontrivial>>(true), "");
 156   static_assert(test_property<is_swappable,
 157                 std::stack<int>>(true), "");
 158   static_assert(test_property<is_swappable,
 159                 std::stack<int>[1]>(true), "");
 160   static_assert(test_property<is_swappable,
 161                 std::stack<int>[1][2]>(true), "");
 162   static_assert(test_property<is_swappable,
 163                 std::stack<int>[1][2][3]>(true), "");
 164   static_assert(test_property<is_swappable,
 165                 std::stack<construct::Nontrivial>>(true), "");
 166   // Negative tests.
 167   static_assert(test_property<is_swappable, void>(false), "");
 168   static_assert(test_property<is_swappable, const void>(false), "");
 169   static_assert(test_property<is_swappable, void()>(false), "");
 170   static_assert(test_property<is_swappable, void() const>(false), "");
 171   static_assert(test_property<is_swappable, void() volatile>(false), "");
 172   static_assert(test_property<is_swappable,
 173     void() const volatile>(false), "");
 174   static_assert(test_property<is_swappable, const int>(false), "");
 175   static_assert(test_property<is_swappable, const bool>(false), "");
 176   static_assert(test_property<is_swappable, int[]>(false), "");
 177   static_assert(test_property<is_swappable, const int[]>(false), "");
 178   static_assert(test_property<is_swappable, int[][1]>(false), "");
 179   static_assert(test_property<is_swappable, const int[1]>(false), "");
 180   static_assert(test_property<is_swappable, const int[1][2]>(false), "");
 181   static_assert(test_property<is_swappable, const int[1][2][3]>(false), "");
 182   static_assert(test_property<is_swappable, construct::DelCopy>(false), "");
 183   static_assert(test_property<is_swappable,
 184     construct::Abstract>(false), "");
 185   static_assert(test_property<is_swappable,
 186     construct::NontrivialUnion>(false), "");
 187   static_assert(test_property<is_swappable, funny::F>(false), "");
 188   static_assert(test_property<is_swappable, funny::F[1]>(false), "");
 189   static_assert(test_property<is_swappable, funny::F[1][2]>(false), "");
 190   static_assert(test_property<is_swappable, funny::F[1][2][3]>(false), "");
 191   static_assert(test_property<is_swappable, funny::F[4]>(false), "");
 192   static_assert(test_property<is_swappable, construct::DelCopy>(false), "");
 193   static_assert(test_property<is_swappable,
 194      DeletedCopyAssignClass>(false), "");
 195   static_assert(test_property<is_swappable,
 196      DeletedMoveAssignClass>(false), "");
 197   static_assert(test_property<is_swappable, funny::F2>(false), "");
 198   static_assert(test_property<is_swappable, funny::F2[1]>(false), "");
 199   static_assert(test_property<is_swappable, funny::F2[1][2]>(false), "");
 200   static_assert(test_property<is_swappable, funny::F2[1][2][3]>(false), "");
 201   static_assert(test_property<is_swappable, funny::F2[4]>(false), "");
 202   static_assert(test_property<is_swappable, funny::F2[5]>(false), "");
 203 }