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

   1 // Deque 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/deque>
  22 #include <testsuite_hooks.h>
  23
  24 using __gnu_debug::deque;
  25
  26 bool test = true;
  27
  28 // Erase
  29 void test04()
  30 {
  31   deque<int> v(20, 42);
  32
  33   // Single element erase (middle)
  34   deque<int>::iterator before = v.begin();
  35   deque<int>::iterator at = before + 3;
  36   deque<int>::iterator after = at;
  37   at = v.erase(at);
  38   VERIFY(before._M_singular());
  39   VERIFY(at._M_dereferenceable());
  40   VERIFY(after._M_singular());
  41
  42   // Single element erase (end)
  43   before = v.begin();
  44   at = before;
  45   after = at + 1;
  46   at = v.erase(at);
  47   VERIFY(before._M_singular());
  48   VERIFY(at._M_dereferenceable());
  49   VERIFY(after._M_dereferenceable());
  50
  51   // Multiple element erase
  52   before = v.begin();
  53   at = before + 3;
  54   v.erase(at, at + 3);
  55   VERIFY(before._M_singular());
  56   VERIFY(at._M_singular());
  57
  58   // Multiple element erase at end
  59   before = v.begin();
  60   at = before + 3;
  61   v.erase(at, v.end());
  62   *before;
  63
  64   // clear()
  65   before = v.begin();
  66   VERIFY(before._M_dereferenceable());
  67   v.clear();
  68   VERIFY(before._M_singular());
  69 }
  70
  71 #if !__GXX_WEAK__ && _MT_ALLOCATOR_H
  72 // Explicitly instantiate for systems with no COMDAT or weak support.
  73 template class __gnu_cxx::__mt_alloc<int*>;
  74 template class __gnu_cxx::__mt_alloc<int>;
  75 #endif
  76
  77 int main()
  78 {
  79   test04();
  80   return 0;
  81 }