libstdc++-v3/testsuite/23_containers/vector/capacity/resize/strong_guarantee.cc

   1 // Copyright (C) 2018-2023 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 3, 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 COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 #include <vector>
  19 #include <testsuite_hooks.h>
  20
  21 struct X
  22 {
  23   X() : data(1)
  24   {
  25     if (fail)
  26       throw 1;
  27   }
  28
  29   static bool fail;
  30
  31   std::vector<int> data;
  32 };
  33
  34 bool X::fail = false;
  35
  36 void
  37 test01()
  38 {
  39   std::vector<X> v(2);
  40   X* const addr = &v[0];
  41   bool caught = false;
  42   try {
  43     X::fail = true;
  44     v.resize(v.capacity() + 1); // force reallocation
  45   } catch (int) {
  46     caught = true;
  47   }
  48   VERIFY( caught );
  49   VERIFY( v.size() == 2 );
  50   VERIFY( &v[0] == addr );
  51   // PR libstdc++/83982
  52   VERIFY( ! v[0].data.empty() );
  53   VERIFY( ! v[1].data.empty() );
  54 }
  55
  56 int
  57 main()
  58 {
  59   test01();
  60 }