libstdc++-v3/testsuite/23_containers/map/allocator/swap.cc

   1 // Copyright (C) 2013-2025 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 // { dg-do run { target c++11 } }
  19
  20 #include <map>
  21 #include <testsuite_hooks.h>
  22 #include <testsuite_allocator.h>
  23
  24 struct T { int i; };
  25
  26 bool operator<(T l, T r) { return l.i < r.i; }
  27
  28 using Cmp = std::less<T>;
  29
  30 struct U { };
  31
  32 using __gnu_test::propagating_allocator;
  33
  34 // It is undefined behaviour to swap() containers wth unequal allocators
  35 // if the allocator doesn't propagate, so ensure the allocators compare
  36 // equal, while still being able to test propagation via get_personality().
  37 bool
  38 operator==(const propagating_allocator<std::pair<const T, U>, false>&,
  39            const propagating_allocator<std::pair<const T, U>, false>&)
  40 {
  41   return true;
  42 }
  43
  44 bool
  45 operator!=(const propagating_allocator<std::pair<const T, U>, false>&,
  46            const propagating_allocator<std::pair<const T, U>, false>&)
  47 {
  48   return false;
  49 }
  50
  51 void test01()
  52 {
  53   typedef propagating_allocator<std::pair<const T, U>, false> alloc_type;
  54   typedef std::map<T, U, Cmp, alloc_type> test_type;
  55   test_type v1(alloc_type(1));
  56   v1 = { test_type::value_type{} };
  57   test_type v2(alloc_type(2));
  58   v2 = { test_type::value_type{} };
  59   std::swap(v1, v2);
  60   VERIFY(1 == v1.get_allocator().get_personality());
  61   VERIFY(2 == v2.get_allocator().get_personality());
  62   // swap back so assertions in uneq_allocator::deallocate don't fail
  63   std::swap(v1, v2);
  64 }
  65
  66 void test02()
  67 {
  68   typedef propagating_allocator<std::pair<const T, U>, true> alloc_type;
  69   typedef std::map<T, U, Cmp, alloc_type> test_type;
  70   test_type v1(alloc_type(1));
  71   v1 = { test_type::value_type{} };
  72   test_type v2(alloc_type(2));
  73   v2 = { test_type::value_type{} };
  74   std::swap(v1, v2);
  75   VERIFY(2 == v1.get_allocator().get_personality());
  76   VERIFY(1 == v2.get_allocator().get_personality());
  77 }
  78
  79 int main()
  80 {
  81   test01();
  82   test02();
  83   return 0;
  84 }