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// 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_DISTANCE_HPP
#define BOOST_ITERATOR_DISTANCE_HPP

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

namespace boost {
namespace iterators {
namespace detail {

template< typename SinglePassIterator >
inline BOOST_CXX14_CONSTEXPR typename iterator_difference< SinglePassIterator >::type
distance_impl(SinglePassIterator first, SinglePassIterator last, single_pass_traversal_tag)
{
    typename iterator_difference< SinglePassIterator >::type n = 0;
    while (first != last)
    {
        ++first;
        ++n;
    }
    return n;
}

template< typename RandomAccessIterator >
inline BOOST_CXX14_CONSTEXPR typename iterator_difference< RandomAccessIterator >::type
distance_impl(RandomAccessIterator first, RandomAccessIterator last, random_access_traversal_tag)
{
    return last - first;
}

} // namespace detail

namespace distance_adl_barrier {

template< typename SinglePassIterator >
inline BOOST_CXX14_CONSTEXPR typename iterator_difference< SinglePassIterator >::type
distance(SinglePassIterator first, SinglePassIterator last)
{
    return detail::distance_impl(first, last, typename iterator_traversal< SinglePassIterator >::type());
}

} // namespace distance_adl_barrier

using namespace distance_adl_barrier;

} // namespace iterators

using namespace iterators::distance_adl_barrier;

} // namespace boost

#endif

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Name	Size	Perms	Modified	Actions
detail DIR	-	drwxr-xr-x	2026-02-11 07:32:10	Edit Download recursive recursive
advance.hpp	1.62 KB	lrw-r--r--	2026-01-27 23:50:52	Edit Download recursive recursive
distance.hpp	1.58 KB	lrw-r--r--	2026-01-27 23:50:52	Edit Download recursive recursive
enable_if_convertible.hpp	2.58 KB	lrw-r--r--	2026-01-27 23:50:52	Edit Download recursive recursive
interoperable.hpp	1.27 KB	lrw-r--r--	2026-01-27 23:50:52	Edit Download recursive recursive
is_iterator.hpp	3.96 KB	lrw-r--r--	2026-01-27 23:50:52	Edit Download recursive recursive
iterator_adaptor.hpp	6.60 KB	lrw-r--r--	2026-01-27 23:50:52	Edit Download recursive recursive
iterator_categories.hpp	3.51 KB	lrw-r--r--	2026-01-27 23:50:52	Edit Download recursive recursive
iterator_concepts.hpp	7.07 KB	lrw-r--r--	2026-01-27 23:50:52	Edit Download recursive recursive
iterator_facade.hpp	29.22 KB	lrw-r--r--	2026-01-27 23:50:52	Edit Download recursive recursive
iterator_traits.hpp	1.69 KB	lrw-r--r--	2026-01-27 23:50:52	Edit Download recursive recursive
minimum_category.hpp	935 B	lrw-r--r--	2026-01-27 23:50:52	Edit Download recursive recursive
min_category.hpp	2.03 KB	lrw-r--r--	2026-01-27 23:50:52	Edit Download recursive recursive
reverse_iterator.hpp	1.97 KB	lrw-r--r--	2026-01-27 23:50:52	Edit Download recursive recursive
transform_iterator.hpp	4.80 KB	lrw-r--r--	2026-01-27 23:50:52	Edit Download recursive recursive

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