1// 2003-04-01 Benjamin Kosnik  <bkoz@redhat.com>
2
3// Copyright (C) 2003-2015 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 3, 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 COPYING3.  If not see
18// <http://www.gnu.org/licenses/>.
19
20// 27.7.6 - Member functions [lib.stringstream.members]
21
22#include <sstream>
23#include <testsuite_hooks.h>
24
25void
26redirect_buffer(std::ios& stream, std::streambuf* new_buf)
27{ stream.rdbuf(new_buf); }
28
29std::streambuf*
30active_buffer(std::ios& stream)
31{ return stream.rdbuf(); }
32
33// libstdc++/2832
34void test02()
35{
36  bool test __attribute__((unused)) = true;
37  std::stringbuf sbuf;
38  std::streambuf* pbasebuf0 = &sbuf;
39
40  std::stringstream sstrm1;
41  // derived rdbuf() always returns original streambuf, even though
42  // it's no longer associated with the stream.
43  std::stringbuf* const buf1 = sstrm1.rdbuf();
44  // base rdbuf() returns the currently associated streambuf
45  std::streambuf* pbasebuf1 = active_buffer(sstrm1);
46  redirect_buffer(sstrm1, &sbuf);
47  std::stringbuf* const buf2 = sstrm1.rdbuf();
48  std::streambuf* pbasebuf2 = active_buffer(sstrm1);
49  VERIFY( buf1 == buf2 );
50  VERIFY( pbasebuf1 != pbasebuf2 );
51  VERIFY( pbasebuf2 == pbasebuf0 );
52
53  // How confusing and non-intuitive is this?
54  // These semantics are a joke, a serious defect, and incredibly lame.
55}
56
57int main()
58{
59  test02();
60  return 0;
61}
62