iterator_traits.hpp

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// Copyright David Abrahams 2003.
// 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 ITERATOR_TRAITS_DWA200347_HPP
# define ITERATOR_TRAITS_DWA200347_HPP
 
# include <boost/detail/iterator.hpp>
# include <boost/detail/workaround.hpp>
 
namespace boost {
namespace iterators {
 
// Macro for supporting old compilers, no longer needed but kept
// for backwards compatibility (it was documented).
#define BOOST_ITERATOR_CATEGORY iterator_category
 
 
template <class Iterator>
struct iterator_value
{
    typedef typename boost::detail::iterator_traits<Iterator>::value_type type;
};
 
template <class Iterator>
struct iterator_reference
{
    typedef typename boost::detail::iterator_traits<Iterator>::reference type;
};
 
 
template <class Iterator>
struct iterator_pointer
{
    typedef typename boost::detail::iterator_traits<Iterator>::pointer type;
};
 
template <class Iterator>
struct iterator_difference
{
    typedef typename boost::detail::iterator_traits<Iterator>::difference_type type;
};
 
template <class Iterator>
struct iterator_category
{
    typedef typename boost::detail::iterator_traits<Iterator>::iterator_category type;
};
 
} // namespace iterators
 
using iterators::iterator_value;
using iterators::iterator_reference;
using iterators::iterator_pointer;
using iterators::iterator_difference;
using iterators::iterator_category;
 
} // namespace boost
 
#endif // ITERATOR_TRAITS_DWA200347_HPP