1// 2004-10-01  Paolo Carlini  <pcarlini@suse.de>
2
3// Copyright (C) 2004 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 2, 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 COPYING.  If not, write to the Free
18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
19// USA.
20
21// 27.7.1.3  Overridden virtual functions  [lib.stringbuf.virtuals]
22
23#include <sstream>
24#include <testsuite_hooks.h>
25
26class my_stringbuf : public std::stringbuf
27{
28public:
29  my_stringbuf(const std::string& str, std::ios_base::openmode mode)
30  : std::stringbuf(str, mode) { }
31
32  int_type
33  pub_pbackfail(int_type c)
34  { return this->pbackfail(c); }
35};
36
37void test01()
38{
39  bool test __attribute__((unused)) = true;
40  using namespace std;
41
42  typedef my_stringbuf::int_type    int_type;
43  typedef my_stringbuf::traits_type traits_type;
44
45  my_stringbuf sbuf("any", ios_base::in | ios_base::out);
46
47  int_type c = sbuf.sgetc();
48  VERIFY( c == 'a' );
49
50  c = sbuf.pub_pbackfail('z');
51  VERIFY( c == traits_type::eof() );
52  c = sbuf.sbumpc();
53  VERIFY( c == 'a' );
54
55  c = sbuf.pub_pbackfail('a');
56  VERIFY( c == 'a' );
57  c = sbuf.sbumpc();
58  VERIFY( c == 'a' );
59
60  c = sbuf.pub_pbackfail('x');
61  VERIFY( c == 'x' );
62  c = sbuf.sbumpc();
63  VERIFY( c == 'x' );
64
65  const int_type eof = traits_type::eof();
66  c = sbuf.pub_pbackfail(eof);
67  VERIFY( c == traits_type::not_eof(eof) );
68  c = sbuf.sgetc();
69  VERIFY( c == 'x' );
70}
71
72int main()
73{
74  test01();
75  return 0;
76}
77