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

   1 // Copyright (C) 2005-2020 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 // 27.6.2.6 Unformatted output functions
  19 //
  20 // _GLIBCXX_RESOLVE_LIB_DEFECTS
  21 // DR 60. What is a formatted input function?
  22 // basic_ostream::flush() does not behave as an unformatted output function.
  23
  24 #include <ostream>
  25 #include <testsuite_hooks.h>
  26 #include <testsuite_io.h>
  27
  28 void test02()
  29 {
  30   __gnu_test::sync_wstreambuf buf;
  31   std::wostream os(&buf);
  32
  33   __gnu_test::sync_wstreambuf buf_tie;
  34   std::wostream os_tie(&buf_tie);
  35
  36   // No sentry should be constructed so os.tie()->flush() should not be
  37   // called.
  38   os.tie(&os_tie);
  39
  40   os.flush();
  41
  42   VERIFY( os.good() );
  43   VERIFY( buf.sync_called() );
  44   VERIFY( !buf_tie.sync_called() );
  45
  46   // os.rdbuf()->pubsync() should be called even if !os.good().
  47   os.setstate(std::ios_base::eofbit);
  48
  49   os.flush();
  50
  51   VERIFY( os.rdstate() == std::ios_base::eofbit );
  52   VERIFY( buf.sync_called() );
  53   VERIFY( !buf_tie.sync_called() );
  54 }
  55
  56 int main()
  57 {
  58   test02();
  59   return 0;
  60 }
  61