libstdc++-v3/testsuite/24_iterators/reverse_iterator/dr2188.cc

   1 // Copyright (C) 2018-2022 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 // { dg-do run { target c++11 } }
  19
  20 // PR libstdc++/86734
  21
  22 #include <iterator>
  23 #include <testsuite_hooks.h>
  24
  25 void
  26 test01()
  27 {
  28   // LWG DR 2188
  29   // Reverse iterator does not fully support targets that overload operator&
  30   struct X {
  31     int val;
  32     int* operator&() { return &val; }
  33     const int* operator&() const { return &val; }
  34   };
  35
  36   X x[2] = { {1}, {2} };
  37   std::reverse_iterator<X*> rev(x+2);
  38   VERIFY( rev->val == 2 );
  39   ++rev;
  40   VERIFY( rev->val == 1 );
  41 }
  42
  43 int
  44 main()
  45 {
  46   test01();
  47 }