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// Derived from libstdc++/12048 by LJR <ljrittle@acm.org> with

// reminder from Petur Runolfsson <peturr02@ru.is>.

// Copyright (C) 2003, 2009 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 3, 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 COPYING3.  If not see

// <http://www.gnu.org/licenses/>.

// DR 49 states that cin.rdbuf()->sbumpc() and fgetc(stdin) should be

// equivalent and interchangable. Currently however, cin.rdbuf()->sungetc()

// only returns characters that were read with cin.rdbuf()->sbumpc()

// { dg-require-fileio "" }

// { dg-do run { xfail *-*-* } }

#include <iostream>

#include <cstdio>

#include <testsuite_hooks.h>

void

test01()

{

  std::freopen("cin_unget-1.txt", "r", stdin);

  char c1;

  int c2;

  char c3;

  std::cin.get(c1);

  c2 = std::fgetc(stdin);

  std::cin.unget();

  if (std::cin.good())

    {

      std::cin.get(c3);

      VERIFY( std::cin.good() );

      VERIFY( c3 == std::char_traits<char>::to_char_type(c2) );

    }

}

int main(void)

{

  test01();

  return 0;

}