libstdc++-v3/testsuite/experimental/propagate_const/swap/1.cc

   1 // { dg-do run { target c++14 } }
   2
   3 // Copyright (C) 2015-2024 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 #include <experimental/propagate_const>
  21 #include <testsuite_hooks.h>
  22
  23 using std::experimental::propagate_const;
  24
  25 int main()
  26 {
  27   int x{42};
  28   int y{666};
  29   propagate_const<int*> xx{&x};
  30   propagate_const<int*> yy{&y};
  31   VERIFY(*xx == 42);
  32   VERIFY(*yy == 666);
  33   swap(xx, yy);
  34   VERIFY(*xx == 666);
  35   VERIFY(*yy == 42);
  36 }