1// 2003-02-12 Paolo Carlini <pcarlini@unitus.it> 2 3// Copyright (C) 2003 Free Software Foundation, Inc. 4// 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 2, or (at your option) 9// any later version. 10 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. 15 16// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING. If not, write to the Free 18// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 19// USA. 20 21// As a special exception, you may use this file as part of a free software 22// library without restriction. Specifically, if other files instantiate 23// templates or use macros or inline functions from this file, or you compile 24// this file and link it with other files to produce an executable, this 25// file does not by itself cause the resulting executable to be covered by 26// the GNU General Public License. This exception does not however 27// invalidate any other reasons why the executable file might be covered by 28// the GNU General Public License. 29 30// 27.6.2.3 class basic_ostream::sentry 31 32#include <ostream> 33#include <testsuite_hooks.h> 34 35// libstdc++/9563 36struct buf: std::streambuf 37{ 38 std::ios *io_; 39 40 buf (std::ios *io): io_ (io) { } 41 42 virtual int sync () 43 { 44 io_->setstate (std::ios::failbit); 45 return 0; 46 } 47}; 48 49void 50test01() 51{ 52 bool test = true; 53 54 buf b(0); 55 std::ostream strm(&b); 56 57 buf tb(&strm); 58 std::ostream tied(&tb); 59 60 strm.tie(&tied); 61 std::ostream::sentry s(strm); 62 63 VERIFY( !s ); 64} 65 66int main() 67{ 68 test01(); 69 return 0; 70} 71