// Copyright Eric Niebler 2005.

// Distributed under the Boost Software License, Version 1.0. (See

// accompanying file LICENSE_1_0.txt or copy at

// http://www.boost.org/LICENSE_1_0.txt)

#ifndef STL_ITERATOR_EAN20051028_HPP

# define STL_ITERATOR_EAN20051028_HPP

# include <boost/python/detail/prefix.hpp>

# include <boost/python/object/stl_iterator_core.hpp>

# include <boost/iterator/iterator_facade.hpp>

namespace boost { namespace python

{ 

// An STL input iterator over a python sequence

template<typename ValueT>

struct stl_input_iterator

  : boost::iterator_facade<

        stl_input_iterator<ValueT>

      , ValueT

      , std::input_iterator_tag

      , ValueT

    >

{

    stl_input_iterator()

      : impl_()

    {

    }

    // ob is the python sequence

    stl_input_iterator(boost::python::object const &ob)

      : impl_(ob)

    {

    }

private:

    friend class boost::iterator_core_access;

    void increment()

    {

        this->impl_.increment();

    }

    ValueT dereference() const

    {

        return extract<ValueT>(this->impl_.current().get())();

    }

    bool equal(stl_input_iterator<ValueT> const &that) const

    {

        return this->impl_.equal(that.impl_);

    }

    objects::stl_input_iterator_impl impl_;

};

}} // namespace boost::python

#endif // STL_ITERATOR_EAN20051028_HPP