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

   1 // Map iterator invalidation tests
   2
   3 // Copyright (C) 2003-2022 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
  24 using __gnu_debug::map;
  25 using std::advance;
  26
  27 bool test = true;
  28
  29 // Erase
  30 void test02()
  31 {
  32   map<int, int> v;
  33   for (int i = 0; i < 20; ++i)
  34     v[i] = 20-i;
  35
  36   // Single element erase (middle)
  37   map<int, int>::iterator before = v.begin();
  38   map<int, int>::iterator at = before;
  39   advance(at, 3);
  40   map<int, int>::iterator after = at;
  41   ++after;
  42   v.erase(at);
  43   VERIFY(before._M_dereferenceable());
  44   VERIFY(at._M_singular());
  45   VERIFY(after._M_dereferenceable());
  46
  47   // Multiple element erase
  48   before = v.begin();
  49   at = before;
  50   advance(at, 3);
  51   after = at;
  52   advance(after, 4);
  53   v.erase(at, after);
  54   VERIFY(before._M_dereferenceable());
  55   VERIFY(at._M_singular());
  56
  57   // clear()
  58   before = v.begin();
  59   map<int, int>::iterator finish = v.end();
  60   VERIFY(before._M_dereferenceable());
  61   v.clear();
  62   VERIFY(before._M_singular());
  63   VERIFY(!finish._M_singular() && !finish._M_dereferenceable());
  64 }
  65
  66 int main()
  67 {
  68   test02();
  69   return 0;
  70 }