gcc/libstdc++-v3/testsuite/27_io/ios_members.cc

// 1999-09-20 bkoz

// Copyright (C) 1999 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

// 27.4.4.2 basic_ios member functions

#include <ios>
// NB: Don't include any other headers in this file.
#include <debug_assert.h>

void test01()
{
  bool test = true;

  std::ios_base::fmtflags flag02, flag03;
  const std::ios_base::fmtflags flag01 = std::ios_base::skipws 
    					 | std::ios_base::dec;

  const std::locale glocale = std::locale();

  std::ios ios_01(NULL);
  std::ios::char_type ct01;
  std::ios::char_type ct02('x');;

  // 27.4.2.3 locales
  ios_01.imbue(glocale);

  // char narrow(char_type c, char dfault) const;
  char c1 = ios_01.narrow(ct02, 0);
  VERIFY( c1 == 'x' );

  // char_type widen(char c) const;
  ct01 = ios_01.widen('c');
  VERIFY( ct01 == 'c' );

#ifdef DEBUG_ASSERT
  assert(test);
#endif
}

// 27.4.4.3 basic_ios iostate flags function
void test02()
{
  bool test = true;

  typedef std::ios_base::fmtflags fmtflags;
  typedef std::ios_base::iostate iostate;
  using std::ios_base;

  iostate iostate02, iostate03;
  const iostate iostate01 = std::ios_base::badbit | std::ios_base::eofbit;
  const iostate iostate04 = std::ios_base::badbit;

  const std::locale glocale = std::locale();

  std::ios ios_01(NULL);
  std::ios::char_type ct01;
  std::ios::char_type ct02('x');;

  // bool fail() const
  VERIFY( ios_01.fail() );

  // bool operator!() const
  VERIFY( !ios_01 );
  
  // iostate rdstate() const
  iostate03 = ios_01.rdstate();
  VERIFY( static_cast<bool>(iostate03 & std::ios_base::badbit) );

  // void clear(iostate state = goodbit)
  try {
    ios_01.clear(std::ios_base::eofbit);
    iostate02 = ios_01.rdstate();
    VERIFY( static_cast<bool>(iostate02 & iostate01) );
  }		 
  catch(std::ios_base::failure& fail) {
    VERIFY( false );
  }
  catch(...) {
    VERIFY( false );
  }

  // iostate exceptions() const
  VERIFY( ios_01.exceptions() == std::ios_base::goodbit );

  // void exceptions(iostate except)
  try {
    ios_01.exceptions(std::ios_base::eofbit);
    VERIFY( false );
  }		 
  catch(std::ios_base::failure& fail) {
    iostate02 = ios_01.exceptions();
    VERIFY( static_cast<bool>(iostate02 & std::ios_base::eofbit) );
  }
  catch(...) {
    VERIFY( false );
  }

  // basic_ios& copyfmt(const basic_ios& rhs)
  std::ios ios_02(NULL);  
  ios_02.exceptions(std::ios_base::eofbit);
  VERIFY( static_cast<bool>(ios_02.exceptions() & std::ios_base::eofbit) );
  try {
    ios_01.copyfmt(ios_02);
    VERIFY( false );
  }		 
  catch(std::ios_base::failure& fail) {
    VERIFY( true );
  }
  catch(...) {
    VERIFY( false );
  }

#ifdef DEBUG_ASSERT
  assert(test);
#endif
}

int main() {
  test01();
  test02();
  return 0;
}