68 lines
2.3 KiB
C++
68 lines
2.3 KiB
C++
/// \file
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// Range v3 library
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//
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// Copyright Eric Niebler 2013-2014
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//
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// Use, modification and distribution is subject to the
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// Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// Project home: https://github.com/ericniebler/range-v3
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//
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#ifndef RANGES_V3_ALGORITHM_ROTATE_COPY_HPP
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#define RANGES_V3_ALGORITHM_ROTATE_COPY_HPP
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#include <functional>
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#include <range/v3/range_fwd.hpp>
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#include <range/v3/begin_end.hpp>
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#include <range/v3/range_concepts.hpp>
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#include <range/v3/range_traits.hpp>
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#include <range/v3/utility/iterator_concepts.hpp>
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#include <range/v3/utility/iterator_traits.hpp>
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#include <range/v3/utility/functional.hpp>
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#include <range/v3/algorithm/copy.hpp>
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#include <range/v3/utility/static_const.hpp>
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#include <range/v3/utility/tagged_pair.hpp>
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#include <range/v3/algorithm/tagspec.hpp>
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namespace ranges
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{
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inline namespace v3
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{
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/// \addtogroup group-algorithms
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/// @{
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struct rotate_copy_fn
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{
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template<typename I, typename S, typename O, typename P = ident,
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CONCEPT_REQUIRES_(ForwardIterator<I>() && Sentinel<S, I>() && WeaklyIncrementable<O>() &&
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IndirectlyCopyable<I, O>())>
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tagged_pair<tag::in(I), tag::out(O)> operator()(I begin, I middle, S end, O out) const
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{
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auto res = copy(middle, std::move(end), std::move(out));
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return {
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std::move(res.first),
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copy(std::move(begin), middle, std::move(res.second)).second
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};
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}
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template<typename Rng, typename O, typename P = ident,
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typename I = iterator_t<Rng>,
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CONCEPT_REQUIRES_(Range<Rng>() && WeaklyIncrementable<O>() &&
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IndirectlyCopyable<I, O>())>
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tagged_pair<tag::in(safe_iterator_t<Rng>), tag::out(O)>
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operator()(Rng &&rng, I middle, O out) const
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{
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return (*this)(begin(rng), std::move(middle), end(rng), std::move(out));
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}
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};
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/// \sa `rotate_copy_fn`
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/// \ingroup group-algorithms
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RANGES_INLINE_VARIABLE(with_braced_init_args<rotate_copy_fn>, rotate_copy)
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/// @}
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} // namespace v3
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} // namespace ranges
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#endif // include guard
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