1// Copyright (C) 2004, 2009 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 3, 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 COPYING3.  If not see
16// <http://www.gnu.org/licenses/>.
17
18// 27.7.6 - Member functions [lib.stringstream.members]
19
20#include <sstream>
21#include <testsuite_hooks.h>
22
23void
24redirect_buffer(std::wios& stream, std::wstreambuf* new_buf)
25{ stream.rdbuf(new_buf); }
26
27std::wstreambuf*
28active_buffer(std::wios& stream)
29{ return stream.rdbuf(); }
30
31// libstdc++/2832
32void test02()
33{
34  bool test __attribute__((unused)) = true;
35  std::wstringbuf sbuf;
36  std::wstreambuf* pbasebuf0 = &sbuf;
37
38  std::wstringstream sstrm1;
39  // derived rdbuf() always returns original streambuf, even though
40  // it's no longer associated with the stream.
41  std::wstringbuf* const buf1 = sstrm1.rdbuf();
42  // base rdbuf() returns the currently associated streambuf
43  std::wstreambuf* pbasebuf1 = active_buffer(sstrm1);
44  redirect_buffer(sstrm1, &sbuf);
45  std::wstringbuf* const buf2 = sstrm1.rdbuf();
46  std::wstreambuf* pbasebuf2 = active_buffer(sstrm1);
47  VERIFY( buf1 == buf2 );
48  VERIFY( pbasebuf1 != pbasebuf2 );
49  VERIFY( pbasebuf2 == pbasebuf0 );
50
51  // How confusing and non-intuitive is this?
52  // These semantics are a joke, a serious defect, and incredibly lame.
53}
54
55int main()
56{
57  test02();
58  return 0;
59}
60