libstdc++-v3/testsuite/23_containers/unordered_multimap/modifiers/92878_92947.cc

   1 // { dg-options "-std=gnu++2a" }
   2 // { dg-do run { target c++2a } }
   3
   4 // Copyright (C) 2020-2021 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 <unordered_map>
  22 #include <testsuite_hooks.h>
  23
  24 struct aggressive_aggregate
  25 {
  26     int a;
  27     int b;
  28 };
  29
  30 void test_emplace()
  31 {
  32   std::unordered_multimap<int, aggressive_aggregate> x;
  33   auto it = x.emplace(std::piecewise_construct,
  34                             std::tuple(0), std::tuple(1, 2));
  35   VERIFY(it->second.a == 1);
  36   VERIFY(it->second.b == 2);
  37   it = x.emplace(std::piecewise_construct,
  38                        std::tuple(1), std::tuple(1));
  39   VERIFY(it->second.a == 1);
  40   VERIFY(it->second.b == 0);
  41   it = x.emplace(std::piecewise_construct,
  42                        std::tuple(2), std::tuple());
  43   VERIFY(it->second.a == 0);
  44   VERIFY(it->second.b == 0);
  45 }
  46
  47 void test_emplace_hint()
  48 {
  49   std::unordered_multimap<int, aggressive_aggregate> x;
  50   auto it = x.emplace_hint(x.begin(),
  51                            std::piecewise_construct,
  52                            std::tuple(3), std::tuple(1, 2));
  53   VERIFY(it->second.a == 1);
  54   VERIFY(it->second.b == 2);
  55   it = x.emplace_hint(x.begin(),
  56                       std::piecewise_construct,
  57                       std::tuple(4), std::tuple(1));
  58   VERIFY(it->second.a == 1);
  59   VERIFY(it->second.b == 0);
  60   it = x.emplace_hint(x.begin(),
  61                       std::piecewise_construct,
  62                       std::tuple(5), std::tuple());
  63   VERIFY(it->second.a == 0);
  64   VERIFY(it->second.b == 0);
  65 }
  66
  67 int main()
  68 {
  69   test_emplace();
  70   test_emplace_hint();
  71 }