libstdc++-v3/testsuite/23_containers/unordered_multimap/erase/51845-multimap.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // 2012-01-19  Jakub Jelinek  <jakub@redhat.com>
   4 //
   5 // Copyright (C) 2012-2025 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 #include <unordered_map>
  23 #include <testsuite_hooks.h>
  24
  25 // libstdc++/51845
  26 void test01()
  27 {
  28   typedef std::unordered_multimap<int, int> Mmap;
  29   typedef Mmap::iterator       iterator;
  30   typedef Mmap::const_iterator const_iterator;
  31   typedef Mmap::value_type     value_type;
  32
  33   Mmap mm1;
  34
  35   mm1.insert(value_type(11135, 1));
  36   mm1.insert(value_type(11135, 17082));
  37   mm1.insert(value_type(9644, 24135));
  38   mm1.insert(value_type(9644, 9644));
  39   mm1.insert(value_type(13984, 19841));
  40   mm1.insert(value_type(9644, 1982));
  41   mm1.insert(value_type(13984, 1945));
  42   mm1.insert(value_type(7, 1982));
  43   mm1.insert(value_type(7, 1945));
  44   VERIFY( mm1.size() == 9 );
  45
  46   iterator it1 = mm1.begin();
  47   ++it1;
  48   iterator it2 = it1;
  49   ++it2;
  50   ++it2;
  51   iterator it3 = mm1.erase(it1, it2);
  52   VERIFY( mm1.size() == 7 );
  53   VERIFY( it3 == it2 );
  54   VERIFY( *it3 == *it2 );
  55
  56   const_iterator it4 = mm1.begin();
  57   ++it4;
  58   const_iterator it5 = it4;
  59   ++it5;
  60   const_iterator it6 = mm1.erase(it4);
  61   VERIFY( mm1.size() == 6 );
  62   VERIFY( it6 == it5 );
  63   VERIFY( *it6 == *it5 );
  64 }
  65
  66 int main()
  67 {
  68   test01();
  69   return 0;
  70 }