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

   1 // Copyright (C) 2013-2024 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 void test01()
  35 {
  36   typedef propagating_allocator<std::pair<const T, U>, false> alloc_type;
  37   typedef std::map<T, U, Cmp, alloc_type> test_type;
  38   test_type v1(alloc_type(1));
  39   v1 = { test_type::value_type{} };
  40
  41   test_type v2(alloc_type(2));
  42   v2 = { test_type::value_type{} };
  43   v2 = std::move(v1);
  44
  45   VERIFY( 1 == v1.get_allocator().get_personality() );
  46   VERIFY( 2 == v2.get_allocator().get_personality() );
  47 }
  48
  49 void test02()
  50 {
  51   typedef propagating_allocator<std::pair<const T, U>, true> alloc_type;
  52   typedef std::map<T, U, Cmp, alloc_type> test_type;
  53   test_type v1(alloc_type(1));
  54   v1 = { test_type::value_type{} };
  55   auto it = v1.begin();
  56
  57   test_type v2(alloc_type(2));
  58   v2 = { test_type::value_type{} };
  59   v2 = std::move(v1);
  60
  61   VERIFY( 1 == v1.get_allocator().get_personality() );
  62   VERIFY( 1 == v2.get_allocator().get_personality() );
  63   VERIFY( it == v2.begin() );
  64 }
  65
  66 void test03()
  67 {
  68   using namespace __gnu_test;
  69
  70   typedef propagating_allocator<std::pair<const int, int>, false,
  71                                 tracker_allocator<std::pair<const int, int>>>
  72     alloc_type;
  73   typedef std::map<int, int, std::less<int>, alloc_type> test_type;
  74
  75   tracker_allocator_counter::reset();
  76
  77   test_type v1(alloc_type(1));
  78   v1 = { { 0, 0 }, { 1, 1 } };
  79
  80   test_type v2(alloc_type(2));
  81   v2 = { { 2, 2 }, { 3, 3 } };
  82
  83   auto allocs = tracker_allocator_counter::get_allocation_count();
  84   auto constructs = tracker_allocator_counter::get_construct_count();
  85
  86   // Check no allocation on move assignment with non propagating allocators.
  87   v1 = std::move(v2);
  88
  89   VERIFY( 1 == v1.get_allocator().get_personality() );
  90   VERIFY( 2 == v2.get_allocator().get_personality() );
  91
  92   VERIFY( tracker_allocator_counter::get_allocation_count() == allocs );
  93   VERIFY( tracker_allocator_counter::get_construct_count() == constructs + 2 );
  94 }
  95
  96 int main()
  97 {
  98   test01();
  99   test02();
 100   test03();
 101   return 0;
 102 }