libstdc++-v3/testsuite/27_io/basic_ios/clear/char/1.cc

   1 // 1999-09-20 bkoz
   2
   3 // Copyright (C) 1999-2021 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
  21 // 27.4.4.2 basic_ios member functions
  22
  23 // NB: Don't include any other headers in this file.
  24 #include <ios>
  25 #include <testsuite_hooks.h>
  26
  27 // 27.4.4.3 basic_ios iostate flags function
  28 void test01()
  29 {
  30   typedef std::ios_base::fmtflags fmtflags;
  31   typedef std::ios_base::iostate iostate;
  32   using std::ios_base;
  33
  34   iostate iostate02, iostate03;
  35   const iostate iostate01 = std::ios_base::badbit | std::ios_base::eofbit;
  36   std::ios ios_01(0);
  37
  38   // bool fail() const
  39   VERIFY( ios_01.fail() );
  40
  41   // bool operator!() const
  42   VERIFY( !ios_01 );
  43
  44   // iostate rdstate() const
  45   iostate03 = ios_01.rdstate();
  46   VERIFY( static_cast<bool>(iostate03 & std::ios_base::badbit) );
  47
  48   // void clear(iostate state = goodbit)
  49   try {
  50     ios_01.clear(std::ios_base::eofbit);
  51     iostate02 = ios_01.rdstate();
  52     VERIFY( static_cast<bool>(iostate02 & iostate01) );
  53   }
  54   catch(std::ios_base::failure& fail) {
  55     VERIFY( false );
  56   }
  57   catch(...) {
  58     VERIFY( false );
  59   }
  60 }
  61
  62 int main()
  63 {
  64   test01();
  65   return 0;
  66 }