libstdc++-v3/testsuite/27_io/basic_filebuf/underflow/char/2.cc

   1 // 2003-06-25 Paolo Carlini <pcarlini@unitus.it>
   2
   3 // Copyright (C) 2003-2016 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 void test01()
  28 {
  29   bool test __attribute__((unused)) = true;
  30   using namespace std;
  31
  32   filebuf fb_out, fb_in_out;
  33
  34   fb_out.open("tmp_underflow.tst", ios::out);
  35   fb_out.sputc('S');
  36   fb_out.sputc('T');
  37   fb_out.close();
  38
  39   fb_in_out.open("tmp_underflow.tst", ios::in | ios::out);
  40   while (fb_in_out.sbumpc() != filebuf::traits_type::eof());
  41
  42   VERIFY( fb_in_out.sputc('x') == 'x' );
  43   fb_in_out.close();
  44 }
  45
  46 int main()
  47 {
  48   test01();
  49 }