1// Copyright (C) 2004-2015 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#include <ext/new_allocator.h>
19
20using namespace std;
21using __gnu_cxx::new_allocator;
22
23template<typename T>
24  class clear_alloc : public new_allocator<T>
25  {
26  public:
27
28    template <typename T1>
29      struct rebind
30      { typedef clear_alloc<T1> other; };
31
32    virtual void clear() throw()
33    { }
34
35    clear_alloc() throw()
36    { }
37
38    clear_alloc(clear_alloc const&) throw() : new_allocator<T>()
39    { }
40
41    template<typename T1>
42    clear_alloc(clear_alloc<T1> const&) throw()
43      { }
44
45    virtual ~clear_alloc() throw()
46    { this->clear(); }
47
48    T* allocate(typename new_allocator<T>::size_type n, const void *hint = 0)
49    {
50      this->clear();
51      return new_allocator<T>::allocate(n, hint);
52    }
53
54    void deallocate(T *ptr, typename new_allocator<T>::size_type n)
55    {
56      this->clear();
57      new_allocator<T>::deallocate(ptr, n);
58    }
59  };
60
61template<typename Container>
62  void Check_Container()
63  {
64    Container* pic = new Container;
65    int x = 230;
66
67    while (x--)
68      {
69	pic->push_back(x);
70      }
71
72    pic->get_allocator();
73
74    // The following has led to infinite recursions or cores.
75    pic->clear();
76
77    delete pic;
78  }
79