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

   1 // Multimap iterator invalidation tests
   2
   3 // Copyright (C) 2003 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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 #include <debug/map>
  22 #include <iterator>
  23 #include <testsuite_hooks.h>
  24 #include <utility>
  25
  26 using __gnu_debug::multimap;
  27 using std::advance;
  28
  29 bool test = true;
  30
  31 // Erase
  32 void test02()
  33 {
  34   multimap<int, int> v;
  35   for (int i = 0; i < 20; ++i)
  36     v.insert(std::make_pair(i, 20-i));
  37
  38   // Single element erase (middle)
  39   multimap<int, int>::iterator before = v.begin();
  40   multimap<int, int>::iterator at = before;
  41   advance(at, 3);
  42   multimap<int, int>::iterator after = at;
  43   ++after;
  44   v.erase(at);
  45   VERIFY(before._M_dereferenceable());
  46   VERIFY(at._M_singular());
  47   VERIFY(after._M_dereferenceable());
  48
  49   // Multiple element erase
  50   before = v.begin();
  51   at = before;
  52   advance(at, 3);
  53   after = at;
  54   advance(after, 4);
  55   v.erase(at, after);
  56   VERIFY(before._M_dereferenceable());
  57   VERIFY(at._M_singular());
  58
  59   // clear()
  60   before = v.begin();
  61   multimap<int, int>::iterator finish = v.end();
  62   VERIFY(before._M_dereferenceable());
  63   v.clear();
  64   VERIFY(before._M_singular());
  65   VERIFY(!finish._M_singular() && !finish._M_dereferenceable());
  66 }
  67
  68 int main()
  69 {
  70   test02();
  71   return !test;
  72 }