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// Copyright (C) 2004, 2009 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 3, or (at your option)

// any later version.

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along

// with this library; see the file COPYING3.  If not see

// <http://www.gnu.org/licenses/>.

#include <vector>

#include <ext/new_allocator.h>

using namespace std;

using __gnu_cxx::new_allocator;

template<typename T>

  class clear_alloc : public new_allocator<T>

  {

  public:

    template <typename T1>

      struct rebind

      { typedef clear_alloc<T1> other; };

    virtual void clear() throw()

    { }

    clear_alloc() throw()

    { }

    clear_alloc(clear_alloc const&) throw() : new_allocator<T>()

    { }

    template<typename T1>

    clear_alloc(clear_alloc<T1> const&) throw()

      { }

    virtual ~clear_alloc() throw()

    { this->clear(); }

    T* allocate(typename new_allocator<T>::size_type n, const void *hint = 0)

    {

      this->clear();

      return new_allocator<T>::allocate(n, hint);

    }

    void deallocate(T *ptr, typename new_allocator<T>::size_type n)

    {

      this->clear();

      new_allocator<T>::deallocate(ptr, n);

    }

  };

template<typename Container>

  void Check_Container()

  {

    Container* pic = new Container;

    int x = 230;

    while (x--)

      {

        pic->push_back(x);

      }

    pic->get_allocator();

    // The following has led to infinite recursions or cores.

    pic->clear();

    delete pic;

  }

int main()

{

  Check_Container<std::vector<int, clear_alloc<int> > >();

  return 0;

}