libstdc++-v3/testsuite/23_containers/map/modifiers/extract.cc

   1 // Copyright (C) 2016-2020 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-options "-std=gnu++17" }
  19
  20 #include <map>
  21 #include <algorithm>
  22 #include <testsuite_hooks.h>
  23
  24 using test_type = std::map<int, int>;
  25
  26 void
  27 test01()
  28 {
  29   test_type c{ {1, 10}, {2, 20}, {3, 30} };
  30   test_type::node_type node;
  31   test_type::insert_return_type ins;
  32   test_type::iterator pos;
  33
  34   node = c.extract(0);
  35   VERIFY( !node );
  36   VERIFY( node.empty() );
  37   VERIFY( c.size() == 3 );
  38
  39   ins = c.insert(std::move(node));
  40   VERIFY( !node );
  41   VERIFY( node.empty() );
  42   VERIFY( c.size() == 3 );
  43   VERIFY( !ins.inserted );
  44   VERIFY( !ins.node );
  45   VERIFY( ins.position == c.end() );
  46
  47   node = c.extract(1);
  48   VERIFY( (bool)node );
  49   VERIFY( !node.empty() );
  50   VERIFY( c.size() == 2 );
  51   VERIFY( c.count(1) == 0 );
  52   VERIFY( node.get_allocator() == c.get_allocator() );
  53   VERIFY( node.key() == 1 );
  54   VERIFY( node.mapped() == 10 );
  55
  56   node.key() = 4;
  57   node.mapped() = 40;
  58   VERIFY( node.key() == 4 );
  59   VERIFY( node.mapped() == 40 );
  60
  61   ins = c.insert(std::move(node));
  62   VERIFY( !node );
  63   VERIFY( node.empty() );
  64   VERIFY( c.size() == 3 );
  65   VERIFY( ins.inserted );
  66   VERIFY( !ins.node );
  67   VERIFY( ins.position != c.end() );
  68   VERIFY( ins.position->first == 4 );
  69   VERIFY( ins.position->second == 40 );
  70   VERIFY( c.count(1) == 0 );
  71   VERIFY( c.count(4) == 1 );
  72   VERIFY( std::is_sorted(c.begin(), c.end()) );
  73
  74   pos = c.insert(c.begin(), std::move(node));
  75   VERIFY( !node );
  76   VERIFY( node.empty() );
  77   VERIFY( c.size() == 3 );
  78   VERIFY( pos == c.end() );
  79
  80   node = c.extract(2);
  81   pos = c.insert(c.begin(), std::move(node));
  82   VERIFY( c.size() == 3 );
  83   VERIFY( pos != c.end() );
  84   VERIFY( pos->first == 2 );
  85   VERIFY( pos->second == 20 );
  86
  87   test_type c2 = c;
  88   node = c2.extract(3);
  89   ins = c.insert(std::move(node));
  90   VERIFY( node.empty() );
  91   VERIFY( ins.position != c.end() );
  92   VERIFY( !ins.inserted );
  93   VERIFY( !ins.node.empty() );
  94   VERIFY( ins.node.key() == 3 );
  95   VERIFY( ins.node.mapped() == 30 );
  96   VERIFY( ins.position->first == ins.node.key() );
  97 }
  98
  99 void
 100 test02()
 101 {
 102   test_type c{ {1, 10}, {2, 20}, {3, 30} };
 103   test_type::node_type node;
 104   test_type::insert_return_type ins;
 105
 106   node = c.extract(c.begin());
 107   VERIFY( (bool)node );
 108   VERIFY( !node.empty() );
 109   VERIFY( c.size() == 2 );
 110   VERIFY( node.get_allocator() == c.get_allocator() );
 111   VERIFY( node.key() == 1 );
 112   VERIFY( node.mapped() == 10 );
 113
 114   ins = c.insert(std::move(node));
 115   VERIFY( node.empty() );
 116   VERIFY( c.size() == 3 );
 117   VERIFY( ins.inserted );
 118   VERIFY( !ins.node );
 119   VERIFY( ins.position != c.end() );
 120   VERIFY( ins.position->first == 1 );
 121   VERIFY( ins.position->second == 10 );
 122 }
 123
 124 void
 125 test03()
 126 {
 127   struct less : std::less<int> { };
 128   using std::is_same_v;
 129   using compat_type1 = std::map<int, int, less>;
 130   static_assert( is_same_v<test_type::node_type, compat_type1::node_type> );
 131   using compat_type2 = std::multimap<int, int>;
 132   static_assert( is_same_v<test_type::node_type, compat_type2::node_type> );
 133   using compat_type3 = std::multimap<int, int, less>;
 134   static_assert( is_same_v<test_type::node_type, compat_type3::node_type> );
 135 }
 136
 137 void
 138 test04()
 139 {
 140   // Check order of members in insert_return_type
 141   auto [pos, ins, node] = test_type::insert_return_type{};
 142   using std::is_same_v;
 143   static_assert( is_same_v<test_type::iterator, decltype(pos)> );
 144   static_assert( is_same_v<bool, decltype(ins)> );
 145   static_assert( is_same_v<test_type::node_type, decltype(node)> );
 146 }
 147
 148 int
 149 main()
 150 {
 151   test01();
 152   test02();
 153   test03();
 154 }