1// Copyright (C) 2003-2015 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// DR 49 states that cin.rdbuf()->sbumpc() and fgetc(stdin) should be
19// equivalent and interchangable. Currently however, cin.rdbuf()->sungetc()
20// only returns characters that were read with cin.rdbuf()->sbumpc()
21
22// { dg-do run { xfail *-*-* } }
23
24#include <iostream>
25#include <cstdio>
26#include <cwchar>
27#include <testsuite_hooks.h>
28
29void
30test01()
31{
32  VERIFY( std::freopen("cin_unget-1.txt", "r", stdin) );
33
34  wchar_t c1;
35  std::wint_t c2;
36  wchar_t c3;
37  std::wcin.get(c1);
38  c2 = std::fgetwc(stdin);
39  std::wcin.unget();
40  if (std::wcin.good())
41    {
42      std::wcin.get(c3);
43      VERIFY( std::wcin.good() );
44      VERIFY( c3 == std::char_traits<wchar_t>::to_char_type(c2) );
45    }
46}
47
48int main(void)
49{
50  test01();
51  return 0;
52}
53