libstdc++-v3/testsuite/23_containers/list/debug/invalidation/3.cc

   1 // List iterator invalidation tests
   2
   3 // Copyright (C) 2003-2024 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/list>
  21 #include <iterator>
  22 #include <testsuite_hooks.h>
  23
  24 // Erase
  25 void test03()
  26 {
  27   using std::advance;
  28
  29   typedef __gnu_debug::list<int> list_type;
  30
  31   list_type v(20, 42);
  32
  33   // Single element erase (middle)
  34   list_type::iterator before = v.begin();
  35   list_type::iterator at = before;
  36   advance(at, 3);
  37   list_type::iterator after = at;
  38   at = v.erase(at);
  39   VERIFY(before._M_dereferenceable());
  40   VERIFY(at._M_dereferenceable());
  41   VERIFY(after._M_singular());
  42
  43   // Single element erase (end)
  44   before = v.begin();
  45   at = before;
  46   after = at;
  47   ++after;
  48   at = v.erase(at);
  49   VERIFY(before._M_singular());
  50   VERIFY(at._M_dereferenceable());
  51   VERIFY(after._M_dereferenceable());
  52
  53   // Multiple element erase
  54   before = v.begin();
  55   at = before;
  56   advance(at, 3);
  57   after = at;
  58   advance(after, 3);
  59   v.erase(at, after);
  60   VERIFY(before._M_dereferenceable());
  61   VERIFY(at._M_singular());
  62
  63   // clear()
  64   before = v.begin();
  65   list_type::iterator finish = v.end();
  66   VERIFY(before._M_dereferenceable());
  67   v.clear();
  68   VERIFY(before._M_singular());
  69   VERIFY(!finish._M_singular() && !finish._M_dereferenceable());
  70 }
  71
  72 int main()
  73 {
  74   test03();
  75   return 0;
  76 }