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// 2001-05-23 Benjamin Kosnik <bkoz@redhat.com>
// Copyright (C) 2001, 2002, 2003, 2009 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// 27.7.3.2 member functions (ostringstream_members)
#include <sstream>
#include <testsuite_hooks.h>
void
redirect_buffer(std::ios& stream, std::streambuf* new_buf)
{ stream.rdbuf(new_buf); }
std::streambuf*
active_buffer(std::ios& stream)
{ return stream.rdbuf(); }
// libstdc++/2832
void test02()
{
bool test __attribute__((unused)) = true;
const char* strlit01 = "fuck war";
const std::string str00;
const std::string str01(strlit01);
std::string str02;
std::stringbuf sbuf(str01);
std::streambuf* pbasebuf0 = &sbuf;
std::ostringstream sstrm1;
VERIFY( sstrm1.str() == str00 );
// derived rdbuf() always returns original streambuf, even though
// it's no longer associated with the stream.
std::stringbuf* const buf1 = sstrm1.rdbuf();
// base rdbuf() returns the currently associated streambuf
std::streambuf* pbasebuf1 = active_buffer(sstrm1);
redirect_buffer(sstrm1, &sbuf);
std::stringbuf* const buf2 = sstrm1.rdbuf();
std::streambuf* pbasebuf2 = active_buffer(sstrm1);
VERIFY( buf1 == buf2 );
VERIFY( pbasebuf1 != pbasebuf2 );
VERIFY( pbasebuf2 == pbasebuf0 );
// derived rdbuf() returns the original buf, so str() doesn't change.
VERIFY( sstrm1.str() != str01 );
VERIFY( sstrm1.str() == str00 );
// however, casting the active streambuf to a stringbuf shows what's up:
std::stringbuf* psbuf = dynamic_cast<std::stringbuf*>(pbasebuf2);
str02 = psbuf->str();
VERIFY( str02 == str01 );
// How confusing and non-intuitive is this?
// These semantics are a joke, a serious defect, and incredibly lame.
}
int main()
{
test02();
return 0;
}
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