// (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/iterator/iterator_adaptor.hpp>
|
|
namespace boost {
|
namespace iterators {
|
|
//
|
//
|
//
|
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
|
{
|
Iterator it = this->base_reference();
|
--it;
|
return *it;
|
}
|
|
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>
|
inline reverse_iterator<BidirectionalIterator> make_reverse_iterator(BidirectionalIterator x)
|
{
|
return reverse_iterator<BidirectionalIterator>(x);
|
}
|
|
} // namespace iterators
|
|
using iterators::reverse_iterator;
|
using iterators::make_reverse_iterator;
|
|
} // namespace boost
|
|
#endif // BOOST_REVERSE_ITERATOR_23022003THW_HPP
|
