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a5544970 | 1 | // Copyright (C) 2004-2019 Free Software Foundation, Inc. |
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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 | |
748086b7 | 6 | // Free Software Foundation; either version 3, or (at your option) |
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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 | |
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15 | // with this library; see the file COPYING3. If not see |
16 | // <http://www.gnu.org/licenses/>. | |
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17 | |
18 | // 27.7.6 - Member functions [lib.stringstream.members] | |
19 | ||
20 | #include <sstream> | |
21 | #include <testsuite_hooks.h> | |
22 | ||
23 | void | |
24 | redirect_buffer(std::wios& stream, std::wstreambuf* new_buf) | |
25 | { stream.rdbuf(new_buf); } | |
26 | ||
27 | std::wstreambuf* | |
28 | active_buffer(std::wios& stream) | |
29 | { return stream.rdbuf(); } | |
30 | ||
31 | // libstdc++/2832 | |
32 | void test02() | |
33 | { | |
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34 | std::wstringbuf sbuf; |
35 | std::wstreambuf* pbasebuf0 = &sbuf; | |
36 | ||
37 | std::wstringstream sstrm1; | |
38 | // derived rdbuf() always returns original streambuf, even though | |
39 | // it's no longer associated with the stream. | |
40 | std::wstringbuf* const buf1 = sstrm1.rdbuf(); | |
41 | // base rdbuf() returns the currently associated streambuf | |
42 | std::wstreambuf* pbasebuf1 = active_buffer(sstrm1); | |
43 | redirect_buffer(sstrm1, &sbuf); | |
44 | std::wstringbuf* const buf2 = sstrm1.rdbuf(); | |
45 | std::wstreambuf* pbasebuf2 = active_buffer(sstrm1); | |
46 | VERIFY( buf1 == buf2 ); | |
47 | VERIFY( pbasebuf1 != pbasebuf2 ); | |
48 | VERIFY( pbasebuf2 == pbasebuf0 ); | |
49 | ||
50 | // How confusing and non-intuitive is this? | |
51 | // These semantics are a joke, a serious defect, and incredibly lame. | |
52 | } | |
53 | ||
54 | int main() | |
55 | { | |
56 | test02(); | |
57 | return 0; | |
58 | } |