libstdc++-v3/testsuite/27_io/objects/wchar_t/12048-2.cc

   1 // Copyright (C) 2003-2018 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 // { dg-require-fileio "" }
  19
  20 #include <iostream>
  21 #include <cstdio>
  22 #include <cwchar>
  23 #include <testsuite_hooks.h>
  24
  25 void
  26 test01()
  27 {
  28   VERIFY( std::freopen("cin_unget-1.txt", "r", stdin) );
  29
  30   wchar_t c1;
  31   std::wint_t c2;
  32   std::wcin.get(c1);
  33   std::wcin.unget();
  34   VERIFY( std::wcin.good() );
  35   c2 = std::fgetwc(stdin);
  36   VERIFY( c2 == std::char_traits<wchar_t>::to_int_type(c1) );
  37 }
  38
  39 int main(void)
  40 {
  41   test01();
  42   return 0;
  43 }