1// Copyright (C) 2004 Free Software Foundation, Inc. 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 6// Free Software Foundation; either version 2, or (at your option) 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 15// with this library; see the file COPYING. If not, write to the Free 16// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 17// USA. 18 19// 27.7.6 - Member functions [lib.stringstream.members] 20 21#include <sstream> 22#include <testsuite_hooks.h> 23 24void 25redirect_buffer(std::wios& stream, std::wstreambuf* new_buf) 26{ stream.rdbuf(new_buf); } 27 28std::wstreambuf* 29active_buffer(std::wios& stream) 30{ return stream.rdbuf(); } 31 32// libstdc++/2832 33void test02() 34{ 35 bool test __attribute__((unused)) = true; 36 std::wstringbuf sbuf; 37 std::wstreambuf* pbasebuf0 = &sbuf; 38 39 std::wstringstream sstrm1; 40 // derived rdbuf() always returns original streambuf, even though 41 // it's no longer associated with the stream. 42 std::wstringbuf* const buf1 = sstrm1.rdbuf(); 43 // base rdbuf() returns the currently associated streambuf 44 std::wstreambuf* pbasebuf1 = active_buffer(sstrm1); 45 redirect_buffer(sstrm1, &sbuf); 46 std::wstringbuf* const buf2 = sstrm1.rdbuf(); 47 std::wstreambuf* pbasebuf2 = active_buffer(sstrm1); 48 VERIFY( buf1 == buf2 ); 49 VERIFY( pbasebuf1 != pbasebuf2 ); 50 VERIFY( pbasebuf2 == pbasebuf0 ); 51 52 // How confusing and non-intuitive is this? 53 // These semantics are a joke, a serious defect, and incredibly lame. 54} 55 56int main() 57{ 58 test02(); 59 return 0; 60} 61