libstdc++-v3/testsuite/20_util/is_nothrow_swappable_with/value.cc

   1 // { dg-options "-std=gnu++17" }
   2 // { dg-do compile }
   3
   4 // Copyright (C) 2016-2017 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11 //
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <type_traits>
  22 #include <testsuite_tr1.h>
  23
  24 #ifndef __cpp_lib_is_swappable
  25 # error "Feature-test macro for is_nothrow_swappable_with missing"
  26 #elif __cpp_lib_is_swappable != 201603
  27 # error "Feature-test macro for is_nothrow_swappable_with has wrong value"
  28 #endif
  29
  30 namespace funny {
  31   struct T0 {};
  32
  33   void swap(T0, T0) noexcept;
  34
  35   struct T1
  36   {
  37     friend void swap(T1, T1) noexcept;
  38   };
  39
  40   struct T2 {};
  41   struct T3 {};
  42
  43   void swap(T2, T3) noexcept;
  44   void swap(T3, T2) noexcept;
  45
  46   struct T4 { operator T0() const noexcept; };
  47
  48   struct F0 {};
  49
  50   void swap(F0, F0) = delete;
  51
  52   struct F1 {};
  53
  54   void swap(F1, F1);
  55
  56   struct F2 {};
  57
  58   void swap(F0, F2) noexcept;
  59   void swap(F2, F0);
  60
  61   struct F3
  62   {
  63     friend void swap(F3, F3) = delete;
  64   };
  65
  66   struct F4
  67   {
  68     friend void swap(F4, F4);
  69   };
  70
  71   struct F5 { operator T0() const; };
  72
  73   struct BoolLike {};
  74
  75   void swap(BoolLike, bool&) noexcept;
  76   void swap(bool&, BoolLike) noexcept;
  77
  78   struct BoolLikeErr {};
  79
  80   void swap(BoolLikeErr, bool&);
  81   void swap(bool&, BoolLikeErr) noexcept;
  82 }
  83
  84 void test01()
  85 {
  86   using std::is_nothrow_swappable_with;
  87   using namespace __gnu_test;
  88   // Positive tests.
  89   static_assert(test_property<is_nothrow_swappable_with, int&, int&>(true),
  90     "");
  91   static_assert(test_property<is_nothrow_swappable_with, funny::T0,
  92     funny::T0>(true), "");
  93   static_assert(test_property<is_nothrow_swappable_with, funny::T0,
  94     const funny::T0>(true), "");
  95   static_assert(test_property<is_nothrow_swappable_with, funny::T1,
  96     funny::T1>(true), "");
  97   static_assert(test_property<is_nothrow_swappable_with, funny::T1,
  98     const funny::T1>(true), "");
  99   static_assert(test_property<is_nothrow_swappable_with, funny::T2,
 100     funny::T3>(true), "");
 101   static_assert(test_property<is_nothrow_swappable_with, funny::T3,
 102     funny::T2>(true), "");
 103   static_assert(test_property<is_nothrow_swappable_with, funny::T0,
 104     funny::T4>(true), "");
 105   static_assert(test_property<is_nothrow_swappable_with, funny::T4,
 106     funny::T0>(true), "");
 107   static_assert(test_property<is_nothrow_swappable_with, funny::BoolLike,
 108     bool&>(true), "");
 109   static_assert(test_property<is_nothrow_swappable_with, const funny::BoolLike,
 110     bool&>(true), "");
 111
 112   // Negative tests.
 113   static_assert(test_property<is_nothrow_swappable_with, const int&,
 114     const int&>(false), "");
 115   static_assert(test_property<is_nothrow_swappable_with, int&,
 116     unsigned&>(false), "");
 117   static_assert(test_property<is_nothrow_swappable_with, funny::F0,
 118     funny::F0>(false), "");
 119   static_assert(test_property<is_nothrow_swappable_with, funny::F0,
 120     const funny::F0>(false), "");
 121   static_assert(test_property<is_nothrow_swappable_with, funny::F1,
 122     funny::F1>(false), "");
 123   static_assert(test_property<is_nothrow_swappable_with, funny::F1,
 124     const funny::F1>(false), "");
 125   static_assert(test_property<is_nothrow_swappable_with, funny::F0,
 126     funny::F2>(false), "");
 127   static_assert(test_property<is_nothrow_swappable_with, funny::F2,
 128     funny::F0>(false), "");
 129   static_assert(test_property<is_nothrow_swappable_with, funny::F3,
 130     funny::F3>(false), "");
 131   static_assert(test_property<is_nothrow_swappable_with, funny::F3,
 132     const funny::F3>(false), "");
 133   static_assert(test_property<is_nothrow_swappable_with, funny::F4,
 134     funny::F4>(false), "");
 135   static_assert(test_property<is_nothrow_swappable_with, funny::F4,
 136     const funny::F4>(false), "");
 137   static_assert(test_property<is_nothrow_swappable_with, funny::T0,
 138     funny::F5>(false), "");
 139   static_assert(test_property<is_nothrow_swappable_with, funny::F5,
 140     funny::T0>(false), "");
 141   static_assert(test_property<is_nothrow_swappable_with, funny::BoolLikeErr,
 142     bool&>(false), "");
 143   static_assert(test_property<is_nothrow_swappable_with,
 144     const funny::BoolLikeErr, bool&>(false), "");
 145 }