libstdc++-v3/testsuite/25_algorithms/swap/dr809.cc

   1 // { dg-do compile }
   2
   3 // Copyright (C) 2008-2024 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
  21 #include <string>
  22 #include <algorithm>
  23
  24 template<class T>
  25   class W
  26   {
  27   public:
  28     T data;
  29   };
  30
  31 template<class T>
  32   void
  33   swap(W<T>& x, W<T>& y)
  34   {
  35     using std::swap;
  36     swap(x.data, y.data);
  37   }
  38
  39 // DR 809. std::swap should be overloaded for array types.
  40 void test01()
  41 {
  42   W<std::string[8]> w1, w2;  // Two objects of a Swappable type.
  43
  44   using std::swap;
  45   swap(w1, w2);
  46 }