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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// 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 BOOST_REVERSE_ITERATOR_23022003THW_HPP
#define BOOST_REVERSE_ITERATOR_23022003THW_HPP
#include <boost/next_prior.hpp>
#include <boost/iterator.hpp>
#include <boost/iterator/iterator_adaptor.hpp>
namespace boost
{
//
//
//
template <class Iterator>
class reverse_iterator
: public iterator_adaptor< reverse_iterator<Iterator>, Iterator >
{
typedef iterator_adaptor< reverse_iterator<Iterator>, Iterator > super_t;
friend class iterator_core_access;
public:
reverse_iterator() {}
explicit reverse_iterator(Iterator x)
: super_t(x) {}
template<class OtherIterator>
reverse_iterator(
reverse_iterator<OtherIterator> const& r
, typename enable_if_convertible<OtherIterator, Iterator>::type* = 0
)
: super_t(r.base())
{}
private:
typename super_t::reference dereference() const { return *boost::prior(this->base()); }
void increment() { --this->base_reference(); }
void decrement() { ++this->base_reference(); }
void advance(typename super_t::difference_type n)
{
this->base_reference() += -n;
}
template <class OtherIterator>
typename super_t::difference_type
distance_to(reverse_iterator<OtherIterator> const& y) const
{
return this->base_reference() - y.base();
}
};
template <class BidirectionalIterator>
reverse_iterator<BidirectionalIterator> make_reverse_iterator(BidirectionalIterator x)
{
return reverse_iterator<BidirectionalIterator>(x);
}
} // namespace boost
#endif // BOOST_REVERSE_ITERATOR_23022003THW_HPP
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