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

   1 // Multiset iterator invalidation tests
   2
   3 // Copyright (C) 2003-2019 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/set>
  21 #include <iterator>
  22 #include <testsuite_hooks.h>
  23
  24 using __gnu_debug::multiset;
  25 using std::advance;
  26
  27 // Erase
  28 void test02()
  29 {
  30   multiset<int> v;
  31   for (int i = 0; i < 20; ++i)
  32     v.insert(i);
  33
  34   // Single element erase (middle)
  35   multiset<int>::iterator before = v.begin();
  36   multiset<int>::iterator at = before;
  37   advance(at, 3);
  38   multiset<int>::iterator after = at;
  39   ++after;
  40   v.erase(at);
  41   VERIFY(before._M_dereferenceable());
  42   VERIFY(at._M_singular());
  43   VERIFY(after._M_dereferenceable());
  44
  45   // Multiple element erase
  46   before = v.begin();
  47   at = before;
  48   advance(at, 3);
  49   after = at;
  50   advance(after, 4);
  51   v.erase(at, after);
  52   VERIFY(before._M_dereferenceable());
  53   VERIFY(at._M_singular());
  54
  55   // clear()
  56   before = v.begin();
  57   multiset<int>::iterator finish = v.end();
  58   VERIFY(before._M_dereferenceable());
  59   v.clear();
  60   VERIFY(before._M_singular());
  61   VERIFY(!finish._M_singular() && !finish._M_dereferenceable());
  62 }
  63
  64 int main()
  65 {
  66   test02();
  67   return 0;
  68 }