libstdc++-v3/testsuite/23_containers/vector/debug_mode_requires_reallocation-1.cc

   1 // Copyright (C) 2008 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 2, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING.  If not, write to the Free
  16 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  17 // USA.
  18
  19 // { dg-options "-D_GLIBCXX_DEBUG" }
  20
  21 #include <vector>
  22 #include <algorithm>
  23 #include <iterator>
  24
  25 // http://gcc.gnu.org/ml/libstdc++/2008-05/msg00039.html
  26 void test01()
  27 {
  28   typedef std::vector<unsigned> array_t;
  29   typedef std::back_insert_iterator<array_t> bii_t;
  30
  31   array_t a;
  32
  33   // Push 5 elements.
  34   a.push_back(0);
  35   a.push_back(1);
  36   a.push_back(2);
  37   a.push_back(3);
  38   a.push_back(4);
  39   // Ensure that there is enough space for other two elements.
  40   // (2 + 5 = 7)
  41   if (a.capacity() < 7)
  42     a.reserve(7);
  43   // Add two new elements.
  44   std::copy(a.begin(), a.begin() + 2, bii_t(a));
  45 }
  46
  47 int main()
  48 {
  49   test01();
  50   return 0;
  51 }