libstdc++-v3/testsuite/23_containers/multimap/debug/invalidation/1.cc

   1 // Multimap iterator invalidation tests
   2
   3 // Copyright (C) 2003-2025 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 #include <debug/map>
  21 #include <iterator>
  22 #include <testsuite_hooks.h>
  23 #include <utility>
  24
  25 using __gnu_debug::multimap;
  26 using std::advance;
  27
  28 bool test = true;
  29
  30 // Assignment
  31 void test01()
  32 {
  33   multimap<int, int> v1;
  34   multimap<int, int> v2;
  35
  36   v1.insert(std::make_pair(17, 42));
  37
  38   multimap<int, int>::iterator start = v1.begin();
  39   multimap<int, int>::iterator finish = v1.end();
  40   VERIFY(start._M_dereferenceable());
  41   VERIFY(!finish._M_dereferenceable() && !finish._M_singular());
  42
  43   v1 = v2;
  44   VERIFY(start._M_singular());
  45   VERIFY(!finish._M_dereferenceable() && !finish._M_singular());
  46 }
  47
  48 int main()
  49 {
  50   test01();
  51   return 0;
  52 }