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a2febbfb | 1 | // 2003-04-01 Benjamin Kosnik <bkoz@redhat.com> |
02ac89cd | 2 | |
f1717362 | 3 | // Copyright (C) 2003-2016 Free Software Foundation, Inc. |
02ac89cd | 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 | |
6bc9506f | 8 | // Free Software Foundation; either version 3, or (at your option) |
02ac89cd | 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 | |
6bc9506f | 17 | // with this library; see the file COPYING3. If not see |
18 | // <http://www.gnu.org/licenses/>. | |
02ac89cd | 19 | |
a2febbfb | 20 | // 27.7.6 - Member functions [lib.stringstream.members] |
02ac89cd | 21 | |
a2febbfb | 22 | #include <sstream> |
0194306c | 23 | #include <testsuite_hooks.h> |
02ac89cd | 24 | |
25 | void | |
26 | redirect_buffer(std::ios& stream, std::streambuf* new_buf) | |
27 | { stream.rdbuf(new_buf); } | |
28 | ||
29 | std::streambuf* | |
30 | active_buffer(std::ios& stream) | |
31 | { return stream.rdbuf(); } | |
32 | ||
33 | // libstdc++/2832 | |
34 | void test02() | |
35 | { | |
f8ef786c | 36 | bool test __attribute__((unused)) = true; |
a2febbfb | 37 | std::stringbuf sbuf; |
38 | std::streambuf* pbasebuf0 = &sbuf; | |
02ac89cd | 39 | |
a2febbfb | 40 | std::stringstream sstrm1; |
02ac89cd | 41 | // derived rdbuf() always returns original streambuf, even though |
42 | // it's no longer associated with the stream. | |
a2febbfb | 43 | std::stringbuf* const buf1 = sstrm1.rdbuf(); |
02ac89cd | 44 | // base rdbuf() returns the currently associated streambuf |
45 | std::streambuf* pbasebuf1 = active_buffer(sstrm1); | |
a2febbfb | 46 | redirect_buffer(sstrm1, &sbuf); |
47 | std::stringbuf* const buf2 = sstrm1.rdbuf(); | |
02ac89cd | 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 | ||
57 | int main() | |
58 | { | |
59 | test02(); | |
60 | return 0; | |
61 | } |