libstdc++-v3/testsuite/27_io/basic_filebuf/pbackfail/char/9761.cc

   1 // 2003-06-02 Paolo Carlini <pcarlini@unitus.it>
   2
   3 // Copyright (C) 2003-2020 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 27.8.1.4 Overridden virtual functions
  21
  22 // { dg-require-fileio "" }
  23
  24 #include <fstream>
  25 #include <testsuite_hooks.h>
  26
  27 const char name_01[] = "filebuf_virtuals-1.txt"; // file with data in it
  28
  29 // libstdc++/9761
  30 void test01()
  31 {
  32   using namespace std;
  33
  34   filebuf fbuf;
  35   filebuf::int_type r1, r2;
  36
  37   fbuf.open(name_01, ios_base::in);
  38
  39   fbuf.sbumpc();
  40   fbuf.sbumpc();
  41
  42   r1 = fbuf.sputbackc('a');
  43   r2 = fbuf.sputbackc('b');
  44
  45   fbuf.close();
  46
  47   VERIFY( r1 != filebuf::traits_type::eof() );
  48   VERIFY( r2 == filebuf::traits_type::eof() );
  49 }
  50
  51 int main()
  52 {
  53   test01();
  54   return 0;
  55 }