toast/iterator/dereference_iterator.hpp

Go to the documentation of this file.

#ifndef toast_iterator_dereference_iterator_hpp_INCLUDED
#define toast_iterator_dereference_iterator_hpp_INCLUDED

#include <iterator>
#include <boost/iterator/transform_iterator.hpp>

#include <toast/traits/pointer_traits.hpp>

namespace toast {

namespace detail {

template <typename Iterator>
struct get_reference
{
  typedef typename std::iterator_traits<Iterator>::value_type pointer_type;
  typedef typename pointer_traits<pointer_type>::reference_type result_type;
  result_type operator()(pointer_type pointer) const { return *pointer; }
};

} // namespace detail

template <typename Iterator>
class dereference_iterator
        : public boost::transform_iterator<detail::get_reference<Iterator>, Iterator>
{
public:
        explicit dereference_iterator(Iterator i)
    : boost::transform_iterator<detail::get_reference<Iterator>, Iterator>
        (boost::make_transform_iterator(i, detail::get_reference<Iterator>())) {}
};

template <typename Iterator>
dereference_iterator<Iterator> make_dereference_iterator(Iterator i)
{
        return dereference_iterator<Iterator>(i);
}

} // namespace toast

#endif // toast_iterator_dereference_iterator_hpp_INCLUDED

---