gomp-20050608-branch/libstdc++-v3/testsuite/27_io/basic_ostream/sentry/wchar_t/2.cc

   1 // Copyright (C) 2005 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 // As a special exception, you may use this file as part of a free software
  20 // library without restriction.  Specifically, if other files instantiate
  21 // templates or use macros or inline functions from this file, or you compile
  22 // this file and link it with other files to produce an executable, this
  23 // file does not by itself cause the resulting executable to be covered by
  24 // the GNU General Public License.  This exception does not however
  25 // invalidate any other reasons why the executable file might be covered by
  26 // the GNU General Public License.
  27
  28 // 27.6.2.3 class basic_ostream::sentry
  29
  30 #include <ostream>
  31 #include <sstream>
  32 #include <testsuite_hooks.h>
  33
  34 // libstdc++/9563
  35 struct buf : std::wstreambuf
  36 {
  37   std::wios *io_;
  38
  39   buf(std::wios *io)
  40   : io_(io) { }
  41
  42   virtual int
  43   sync()
  44   {
  45     io_->setstate (std::wios::failbit);
  46     return 0;
  47   }
  48 };
  49
  50 void
  51 test02()
  52 {
  53   bool test __attribute__((unused)) = true;
  54
  55   buf b(0);
  56   std::wostream strm(&b);
  57
  58   buf tb(&strm);
  59   std::wostream tied(&tb);
  60
  61   strm.tie(&tied);
  62   std::wostream::sentry s(strm);
  63
  64   VERIFY( !s );
  65 }
  66
  67 int main()
  68 {
  69   test02();
  70   return 0;
  71 }