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/// \file
// Range v3 library
//
// Copyright Eric Niebler 2013-present
//
// Use, modification and distribution is subject to 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)
//
// Project home: https://github.com/ericniebler/range-v3
//
#ifndef RANGES_V3_ALGORITHM_COPY_BACKWARD_HPP
#define RANGES_V3_ALGORITHM_COPY_BACKWARD_HPP
#include <utility>
#include <range/v3/range_fwd.hpp>
#include <range/v3/algorithm/result_types.hpp>
#include <range/v3/iterator/concepts.hpp>
#include <range/v3/iterator/operations.hpp>
#include <range/v3/iterator/traits.hpp>
#include <range/v3/range/access.hpp>
#include <range/v3/range/concepts.hpp>
#include <range/v3/range/dangling.hpp>
#include <range/v3/range/traits.hpp>
#include <range/v3/utility/static_const.hpp>
#include <range/v3/detail/prologue.hpp>
namespace ranges
{
/// \addtogroup group-algorithms
/// @{
template<typename I, typename O>
using copy_backward_result = detail::in_out_result<I, O>;
RANGES_FUNC_BEGIN(copy_backward)
/// \brief function template \c copy_backward
template(typename I, typename S, typename O)(
requires bidirectional_iterator<I> AND sentinel_for<S, I> AND
bidirectional_iterator<O> AND indirectly_copyable<I, O>)
constexpr copy_backward_result<I, O> RANGES_FUNC(copy_backward)(I first, S end_, O out)
{
I i = ranges::next(first, end_), last = i;
while(first != i)
*--out = *--i;
return {last, out};
}
/// \overload
template(typename Rng, typename O)(
requires bidirectional_range<Rng> AND bidirectional_iterator<O> AND
indirectly_copyable<iterator_t<Rng>, O>)
copy_backward_result<borrowed_iterator_t<Rng>, O> //
constexpr RANGES_FUNC(copy_backward)(Rng && rng, O out)
{
return (*this)(begin(rng), end(rng), std::move(out));
}
RANGES_FUNC_END(copy_backward)
namespace cpp20
{
using ranges::copy_backward;
using ranges::copy_backward_result;
} // namespace cpp20
/// @}
} // namespace ranges
#include <range/v3/detail/epilogue.hpp>
#endif
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