// 2001-07-19 Peter Schmid  <schmid@snake.iap.physik.tu-darmstadt.de>

// Copyright (C) 2001-2024 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3.  If not see
// <http://www.gnu.org/licenses/>.

// 25.2.8 [lib.alg.unique] Unique

#include <list>
#include <algorithm>

int main()
{
  using namespace std;
  list<int> menge;
  unique (menge.begin(), menge.end());
  // { dg-warning "ignoring return value" "" { target c++17 } 29 }
  return 0;
}
