libstdc++-v3/testsuite/23_containers/list/debug/invalidation/2.cc

   1 // List iterator invalidation tests
   2
   3 // Copyright (C) 2003-2024 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/list>
  21 #include <iterator>
  22 #include <testsuite_hooks.h>
  23
  24 // Resize
  25 void test02()
  26 {
  27   using std::advance;
  28
  29   typedef __gnu_debug::list<int> list_type;
  30
  31   list_type v(10, 17);
  32
  33   list_type::iterator before = v.begin();
  34   advance(before, 6);
  35   list_type::iterator at = before;
  36   advance(at, 1);
  37   list_type::iterator after = at;
  38   advance(after, 1);
  39   list_type::iterator finish = v.end();
  40
  41   // Shrink
  42   v.resize(7);
  43   VERIFY(before._M_dereferenceable());
  44   VERIFY(at._M_singular());
  45   VERIFY(after._M_singular());
  46   VERIFY(!finish._M_singular() && !finish._M_dereferenceable());
  47 }
  48
  49 int main()
  50 {
  51   test02();
  52   return 0;
  53 }