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

   1 // Vector iterator invalidation tests
   2
   3 // Copyright (C) 2003-2025 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 // We need to be pedantic about reallocations for this testcase to be correct.
  21 // { dg-options "-D_GLIBCXX_DEBUG_PEDANTIC" }
  22
  23 #ifndef _GLIBCXX_DEBUG_PEDANTIC
  24 #  define _GLIBCXX_DEBUG_PEDANTIC 1
  25 #endif
  26
  27 #include <debug/vector>
  28 #include <testsuite_hooks.h>
  29
  30 using __gnu_debug::vector;
  31
  32 bool test = true;
  33
  34 // Insert
  35 void test03()
  36 {
  37   vector<int> v(10, 17);
  38   v.reserve(30);
  39
  40   // Insert a single element
  41   vector<int>::iterator before = v.begin() + 6;
  42   vector<int>::iterator at = before + 1;
  43   vector<int>::iterator after = at;
  44   at = v.insert(at, 42);
  45   VERIFY(before._M_dereferenceable());
  46   VERIFY(at._M_dereferenceable());
  47   VERIFY(after._M_singular());
  48
  49   // Insert multiple copies
  50   before = v.begin() + 6;
  51   at = before + 1;
  52   v.insert(at, 3, 42);
  53   VERIFY(before._M_dereferenceable());
  54   VERIFY(at._M_singular());
  55
  56   // Insert iterator range
  57   static int data[] = { 2, 3, 5, 7 };
  58   before = v.begin() + 6;
  59   at = before + 1;
  60   v.insert(at, &data[0], &data[0] + 4);
  61   VERIFY(before._M_dereferenceable());
  62   VERIFY(at._M_singular());
  63
  64   // Insert with reallocation
  65   before = v.begin() + 6;
  66   at = before + 1;
  67   v.insert(at, 30, 17);
  68   VERIFY(before._M_singular());
  69   VERIFY(at._M_singular());
  70
  71   // Single insert with reallocation
  72   vector<int> v2;
  73   v2.reserve(100);
  74   at = v2.begin();
  75   v2.insert(at, 100, 17);
  76   at = v2.end() - 1;
  77   before = v2.begin();
  78   VERIFY(at._M_dereferenceable());
  79   VERIFY(before._M_dereferenceable());
  80   at = v2.insert(at, 42);
  81   VERIFY(at._M_dereferenceable());
  82   VERIFY(before._M_singular());
  83 }
  84
  85 int main()
  86 {
  87   test03();
  88   return 0;
  89 }