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PATH: opt / cpanel / ea-ruby27 / src / passenger-release-6.1.2 / src / cxx_supportlib / vendor-modified / boost / iterator

// Copyright (C) 2017 Michel Morin.
//
// 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_ITERATOR_ADVANCE_HPP
#define BOOST_ITERATOR_ADVANCE_HPP

#include <boost/config.hpp>
#include <boost/iterator/iterator_categories.hpp>

namespace boost {
namespace iterators {
namespace detail {

template< typename InputIterator, typename Distance >
inline BOOST_CXX14_CONSTEXPR void advance_impl(InputIterator& it, Distance n, incrementable_traversal_tag)
{
    while (n > 0)
    {
        ++it;
        --n;
    }
}

template< typename BidirectionalIterator, typename Distance >
inline BOOST_CXX14_CONSTEXPR void advance_impl(BidirectionalIterator& it, Distance n, bidirectional_traversal_tag)
{
    if (n >= 0)
    {
        while (n > 0)
        {
            ++it;
            --n;
        }
    }
    else
    {
        while (n < 0)
        {
            --it;
            ++n;
        }
    }
}

template< typename RandomAccessIterator, typename Distance >
inline BOOST_CXX14_CONSTEXPR void advance_impl(RandomAccessIterator& it, Distance n, random_access_traversal_tag)
{
    it += n;
}

} // namespace detail

namespace advance_adl_barrier {

template< typename InputIterator, typename Distance >
inline BOOST_CXX14_CONSTEXPR void advance(InputIterator& it, Distance n)
{
    detail::advance_impl(it, n, typename iterator_traversal< InputIterator >::type());
}

} // namespace advance_adl_barrier

using namespace advance_adl_barrier;

} // namespace iterators

using namespace iterators::advance_adl_barrier;

} // namespace boost

#endif

[-] iterator_concepts.hpp [edit]
[-] is_iterator.hpp [edit]
[-] distance.hpp [edit]
[-] min_category.hpp [edit]
[-] iterator_facade.hpp [edit]
[-] transform_iterator.hpp [edit]
[-] enable_if_convertible.hpp [edit]
[+] ..
[-] iterator_categories.hpp [edit]
[-] iterator_adaptor.hpp [edit]
[-] iterator_traits.hpp [edit]
[-] advance.hpp [edit]
[-] reverse_iterator.hpp [edit]
[+] detail
[-] interoperable.hpp [edit]
[-] minimum_category.hpp [edit]