libstdc++-v3/testsuite/23_containers/deque/debug/invalidation/4.cc

   1 // Deque iterator invalidation tests
   2
   3 // Copyright (C) 2003-2021 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/deque>
  21 #include <testsuite_hooks.h>
  22
  23 using __gnu_debug::deque;
  24
  25 bool test = true;
  26
  27 // Erase
  28 void test04()
  29 {
  30   deque<int> v(20, 42);
  31
  32   // Single element erase (middle)
  33   deque<int>::iterator before = v.begin();
  34   deque<int>::iterator at = before + 3;
  35   deque<int>::iterator after = at;
  36   at = v.erase(at);
  37   VERIFY(before._M_singular());
  38   VERIFY(at._M_dereferenceable());
  39   VERIFY(after._M_singular());
  40
  41   // Single element erase (end)
  42   before = v.begin();
  43   at = before;
  44   after = at + 1;
  45   at = v.erase(at);
  46   VERIFY(before._M_singular());
  47   VERIFY(at._M_dereferenceable());
  48   VERIFY(after._M_dereferenceable());
  49
  50   // Multiple element erase
  51   before = v.begin();
  52   at = before + 3;
  53   v.erase(at, at + 3);
  54   VERIFY(before._M_singular());
  55   VERIFY(at._M_singular());
  56
  57   // Multiple element erase at end
  58   before = v.begin();
  59   at = before + 3;
  60   v.erase(at, v.end());
  61   *before;
  62
  63   // clear()
  64   before = v.begin();
  65   VERIFY(before._M_dereferenceable());
  66   v.clear();
  67   VERIFY(before._M_singular());
  68 }
  69
  70 int main()
  71 {
  72   test04();
  73   return 0;
  74 }