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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/27_io/basic_stringstream/rdbuf/char/2832.cc
1 // 2003-04-01 Benjamin Kosnik <bkoz@redhat.com>
3 // Copyright (C) 2003-2018 Free Software Foundation, Inc.
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)
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.
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/>.
20 // 27.7.6 - Member functions [lib.stringstream.members]
23 #include <testsuite_hooks.h>
26 redirect_buffer(std::ios
& stream
, std::streambuf
* new_buf
)
27 { stream
.rdbuf(new_buf
); }
30 active_buffer(std::ios
& stream
)
31 { return stream
.rdbuf(); }
37 std::streambuf
* pbasebuf0
= &sbuf
;
39 std::stringstream sstrm1
;
40 // derived rdbuf() always returns original streambuf, even though
41 // it's no longer associated with the stream.
42 std::stringbuf
* const buf1
= sstrm1
.rdbuf();
43 // base rdbuf() returns the currently associated streambuf
44 std::streambuf
* pbasebuf1
= active_buffer(sstrm1
);
45 redirect_buffer(sstrm1
, &sbuf
);
46 std::stringbuf
* const buf2
= sstrm1
.rdbuf();
47 std::streambuf
* pbasebuf2
= active_buffer(sstrm1
);
48 VERIFY( buf1
== buf2
);
49 VERIFY( pbasebuf1
!= pbasebuf2
);
50 VERIFY( pbasebuf2
== pbasebuf0
);
52 // How confusing and non-intuitive is this?
53 // These semantics are a joke, a serious defect, and incredibly lame.