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

   1 // Multimap iterator invalidation tests
   2
   3 // Copyright (C) 2003, 2005, 2006, 2009 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 // Erase
  31 void test02()
  32 {
  33   multimap<int, int> v;
  34   for (int i = 0; i < 20; ++i)
  35     v.insert(std::make_pair(i, 20-i));
  36
  37   // Single element erase (middle)
  38   multimap<int, int>::iterator before = v.begin();
  39   multimap<int, int>::iterator at = before;
  40   advance(at, 3);
  41   multimap<int, int>::iterator after = at;
  42   ++after;
  43   v.erase(at);
  44   VERIFY(before._M_dereferenceable());
  45   VERIFY(at._M_singular());
  46   VERIFY(after._M_dereferenceable());
  47
  48   // Multiple element erase
  49   before = v.begin();
  50   at = before;
  51   advance(at, 3);
  52   after = at;
  53   advance(after, 4);
  54   v.erase(at, after);
  55   VERIFY(before._M_dereferenceable());
  56   VERIFY(at._M_singular());
  57
  58   // clear()
  59   before = v.begin();
  60   multimap<int, int>::iterator finish = v.end();
  61   VERIFY(before._M_dereferenceable());
  62   v.clear();
  63   VERIFY(before._M_singular());
  64   VERIFY(!finish._M_singular() && !finish._M_dereferenceable());
  65 }
  66
  67 int main()
  68 {
  69   test02();
  70   return 0;
  71 }