1// Copyright (C) 2005 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 2, 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 COPYING.  If not, write to the Free
16// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
17// USA.
18
19// As a special exception, you may use this file as part of a free software
20// library without restriction.  Specifically, if other files instantiate
21// templates or use macros or inline functions from this file, or you compile
22// this file and link it with other files to produce an executable, this
23// file does not by itself cause the resulting executable to be covered by
24// the GNU General Public License.  This exception does not however
25// invalidate any other reasons why the executable file might be covered by
26// the GNU General Public License.
27
28// 27.6.2.3 class basic_ostream::sentry
29
30#include <ostream>
31#include <sstream>
32#include <testsuite_hooks.h>
33
34// libstdc++/9563
35struct buf : std::wstreambuf
36{
37  std::wios *io_;
38
39  buf(std::wios *io)
40  : io_(io) { }
41
42  virtual int
43  sync()
44  {
45    io_->setstate (std::wios::failbit);
46    return 0;
47  }
48};
49
50void
51test02()
52{
53  bool test __attribute__((unused)) = true;
54
55  buf b(0);
56  std::wostream strm(&b);
57
58  buf tb(&strm);
59  std::wostream tied(&tb);
60
61  strm.tie(&tied);
62  std::wostream::sentry s(strm);
63
64  VERIFY( !s );
65}
66
67int main()
68{
69  test02();
70  return 0;
71}
72