1// 2003-02-12  Paolo Carlini  <pcarlini@unitus.it>
2
3// Copyright (C) 2003 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 2, 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 COPYING.  If not, write to the Free
18// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
19// USA.
20
21// As a special exception, you may use this file as part of a free software
22// library without restriction.  Specifically, if other files instantiate
23// templates or use macros or inline functions from this file, or you compile
24// this file and link it with other files to produce an executable, this
25// file does not by itself cause the resulting executable to be covered by
26// the GNU General Public License.  This exception does not however
27// invalidate any other reasons why the executable file might be covered by
28// the GNU General Public License.
29
30// 27.6.2.3 class basic_ostream::sentry
31
32#include <ostream>
33#include <testsuite_hooks.h>
34
35// libstdc++/9563
36struct buf: std::streambuf
37{
38  std::ios *io_;
39
40  buf (std::ios *io): io_ (io) { }
41
42  virtual int sync ()
43  {
44    io_->setstate (std::ios::failbit);
45    return 0;
46  }
47};
48
49void
50test01()
51{
52  bool test = true;
53
54  buf b(0);
55  std::ostream strm(&b);
56
57  buf tb(&strm);
58  std::ostream tied(&tb);
59
60  strm.tie(&tied);
61  std::ostream::sentry s(strm);
62
63  VERIFY( !s );
64}
65
66int main()
67{
68  test01();
69  return 0;
70}
71