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

   1 // Vector iterator invalidation tests
   2
   3 // Copyright (C) 2003, 2004 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 // We need to be pedantic about reallocations for this testcase to be correct.
  22 // { dg-options "-D_GLIBCXX_DEBUG_PEDANTIC" }
  23
  24 #ifndef _GLIBCXX_DEBUG_PEDANTIC
  25 #  define _GLIBCXX_DEBUG_PEDANTIC 1
  26 #endif
  27
  28 #include <debug/vector>
  29 #include <testsuite_hooks.h>
  30
  31 using __gnu_debug::vector;
  32
  33 bool test = true;
  34
  35 // Insert
  36 void test03()
  37 {
  38   vector<int> v(10, 17);
  39   v.reserve(30);
  40
  41   // Insert a single element
  42   vector<int>::iterator before = v.begin() + 6;
  43   vector<int>::iterator at = before + 1;
  44   vector<int>::iterator after = at;
  45   at = v.insert(at, 42);
  46   VERIFY(before._M_dereferenceable());
  47   VERIFY(at._M_dereferenceable());
  48   VERIFY(after._M_singular());
  49
  50   // Insert multiple copies
  51   before = v.begin() + 6;
  52   at = before + 1;
  53   v.insert(at, 3, 42);
  54   VERIFY(before._M_dereferenceable());
  55   VERIFY(at._M_singular());
  56
  57   // Insert iterator range
  58   static int data[] = { 2, 3, 5, 7 };
  59   before = v.begin() + 6;
  60   at = before + 1;
  61   v.insert(at, &data[0], &data[0] + 4);
  62   VERIFY(before._M_dereferenceable());
  63   VERIFY(at._M_singular());
  64
  65   // Insert with reallocation
  66   before = v.begin() + 6;
  67   at = before + 1;
  68   v.insert(at, 30, 17);
  69   VERIFY(before._M_singular());
  70   VERIFY(at._M_singular());
  71
  72   // Single insert with reallocation
  73   vector<int> v2;
  74   v2.reserve(100);
  75   at = v2.begin();
  76   v2.insert(at, 100, 17);
  77   at = v2.end() - 1;
  78   before = v2.begin();
  79   VERIFY(at._M_dereferenceable());
  80   VERIFY(before._M_dereferenceable());
  81   at = v2.insert(at, 42);
  82   VERIFY(at._M_dereferenceable());
  83   VERIFY(before._M_singular());
  84 }
  85
  86 #if !__GXX_WEAK__ && _MT_ALLOCATOR_H
  87 // Explicitly instantiate for systems with no COMDAT or weak support.
  88 template class __gnu_cxx::__mt_alloc<int>;
  89 #endif
  90
  91 int main()
  92 {
  93   test03();
  94   return 0;
  95 }