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1 // Copyright (C) 2004-2020 Free Software Foundation, Inc.
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)
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.
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/>.
18 // 27.7.6 - Member functions [lib.stringstream.members]
21 #include <testsuite_hooks.h>
24 redirect_buffer(std::wios
& stream
, std::wstreambuf
* new_buf
)
25 { stream
.rdbuf(new_buf
); }
28 active_buffer(std::wios
& stream
)
29 { return stream
.rdbuf(); }
35 std::wstreambuf
* pbasebuf0
= &sbuf
;
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
);
50 // How confusing and non-intuitive is this?
51 // These semantics are a joke, a serious defect, and incredibly lame.