1// Copyright (C) 2004, 2009 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 3, 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 COPYING3. If not see 16// <http://www.gnu.org/licenses/>. 17 18// 27.7.6 - Member functions [lib.stringstream.members] 19 20#include <sstream> 21#include <testsuite_hooks.h> 22 23void 24redirect_buffer(std::wios& stream, std::wstreambuf* new_buf) 25{ stream.rdbuf(new_buf); } 26 27std::wstreambuf* 28active_buffer(std::wios& stream) 29{ return stream.rdbuf(); } 30 31// libstdc++/2832 32void test02() 33{ 34 bool test __attribute__((unused)) = true; 35 std::wstringbuf sbuf; 36 std::wstreambuf* pbasebuf0 = &sbuf; 37 38 std::wstringstream sstrm1; 39 // derived rdbuf() always returns original streambuf, even though 40 // it's no longer associated with the stream. 41 std::wstringbuf* const buf1 = sstrm1.rdbuf(); 42 // base rdbuf() returns the currently associated streambuf 43 std::wstreambuf* pbasebuf1 = active_buffer(sstrm1); 44 redirect_buffer(sstrm1, &sbuf); 45 std::wstringbuf* const buf2 = sstrm1.rdbuf(); 46 std::wstreambuf* pbasebuf2 = active_buffer(sstrm1); 47 VERIFY( buf1 == buf2 ); 48 VERIFY( pbasebuf1 != pbasebuf2 ); 49 VERIFY( pbasebuf2 == pbasebuf0 ); 50 51 // How confusing and non-intuitive is this? 52 // These semantics are a joke, a serious defect, and incredibly lame. 53} 54 55int main() 56{ 57 test02(); 58 return 0; 59} 60