libstdc++-v3/testsuite/27_io/basic_ostream/flush/char/2.cc

   1 // 2003-09-22  Petur Runolfsson  <peturr02@ru.is>
   2
   3 // Copyright (C) 2003-2020 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 3, 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 COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 27.6.2.6 Unformatted output functions
  21 //
  22 // _GLIBCXX_RESOLVE_LIB_DEFECTS
  23 // DR 60. What is a formatted input function?
  24 // basic_ostream::flush() does not behave as an unformatted output function.
  25
  26 #include <ostream>
  27 #include <testsuite_hooks.h>
  28 #include <testsuite_io.h>
  29
  30 void test02()
  31 {
  32   __gnu_test::sync_streambuf buf;
  33   std::ostream os(&buf);
  34
  35   __gnu_test::sync_streambuf buf_tie;
  36   std::ostream os_tie(&buf_tie);
  37
  38   // No sentry should be constructed so os.tie()->flush() should not be
  39   // called.
  40   os.tie(&os_tie);
  41
  42   os.flush();
  43
  44   VERIFY( os.good() );
  45   VERIFY( buf.sync_called() );
  46   VERIFY( !buf_tie.sync_called() );
  47
  48   // os.rdbuf()->pubsync() should be called even if !os.good().
  49   os.setstate(std::ios_base::eofbit);
  50
  51   os.flush();
  52
  53   VERIFY( os.rdstate() == std::ios_base::eofbit );
  54   VERIFY( buf.sync_called() );
  55   VERIFY( !buf_tie.sync_called() );
  56 }
  57
  58 int main()
  59 {
  60   test02();
  61   return 0;
  62 }
  63