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

   1 // 2003-06-10  Paolo Carlini  <pcarlini@unitus.it>
   2
   3 // Copyright (C) 2003-2013 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_08[] = "filebuf_virtuals-8.txt"; // empty file, need to create
  28
  29 class OverBuf : public std::filebuf
  30 {
  31 public:
  32   int_type pub_overflow(int_type c = traits_type::eof())
  33   { return std::filebuf::overflow(c); }
  34 };
  35
  36 // According to 27.5.2.4.5 filebuf::overflow() returns not_eof(eof()).
  37 void test01()
  38 {
  39   using namespace std;
  40   bool test __attribute__((unused)) = true;
  41   typedef OverBuf::traits_type  traits_type;
  42
  43   OverBuf fb;
  44   fb.pubsetbuf(0, 0);
  45   fb.open(name_08, ios_base::out | ios_base::trunc);
  46
  47   VERIFY( fb.pub_overflow() == traits_type::not_eof(traits_type::eof()) );
  48   fb.close();
  49 }
  50
  51 int main()
  52 {
  53   test01();
  54   return 0;
  55 }