libstdc++-v3/testsuite/27_io/objects/wchar_t/12048-5.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 // 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 // { dg-require-fileio "" }
  24
  25 #include <iostream>
  26 #include <cstdio>
  27 #include <cwchar>
  28 #include <testsuite_hooks.h>
  29
  30 void
  31 test01()
  32 {
  33   VERIFY( std::freopen("cin_unget-1.txt", "r", stdin) );
  34
  35   wchar_t c1;
  36   std::wint_t c2;
  37   wchar_t c3;
  38   std::wcin.get(c1);
  39   c2 = std::fgetwc(stdin);
  40   std::wcin.unget();
  41   if (std::wcin.good())
  42     {
  43       std::wcin.get(c3);
  44       VERIFY( std::wcin.good() );
  45       VERIFY( c3 == std::char_traits<wchar_t>::to_char_type(c2) );
  46     }
  47 }
  48
  49 int main(void)
  50 {
  51   test01();
  52   return 0;
  53 }