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
36 struct buf: std::streambuf
37 {
38 std::ios *io_;
39
bufbuf40 buf (std::ios *io): io_ (io) { }
41
syncbuf42 virtual int sync ()
43 {
44 io_->setstate (std::ios::failbit);
45 return 0;
46 }
47 };
48
49 void
test01()50 test01()
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
main()66 int main()
67 {
68 test01();
69 return 0;
70 }
71