90 lines
3.3 KiB
C++
90 lines
3.3 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_SWAP_RANGES_HPP
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#define RANGES_V3_ALGORITHM_SWAP_RANGES_HPP
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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/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 swap_ranges_fn
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{
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template<typename I1, typename S1, typename I2,
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CONCEPT_REQUIRES_(InputIterator<I1>() && Sentinel<S1, I1>() &&
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InputIterator<I2>() && IndirectlySwappable<I1, I2>())>
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tagged_pair<tag::in1(I1), tag::in2(I2)>
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operator()(I1 begin1, S1 end1, I2 begin2) const
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{
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for(; begin1 != end1; ++begin1, ++begin2)
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ranges::iter_swap(begin1, begin2);
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return {begin1, begin2};
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}
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template<typename I1, typename S1, typename I2, typename S2,
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CONCEPT_REQUIRES_(InputIterator<I1>() && Sentinel<S1, I1>() &&
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InputIterator<I2>() && Sentinel<S2, I2>() &&
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IndirectlySwappable<I1, I2>())>
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tagged_pair<tag::in1(I1), tag::in2(I2)>
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operator()(I1 begin1, S1 end1, I2 begin2, S2 end2) const
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{
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for(; begin1 != end1 && begin2 != end2; ++begin1, ++begin2)
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ranges::iter_swap(begin1, begin2);
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return {begin1, begin2};
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}
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template<typename Rng1, typename I2_,
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typename I1 = iterator_t<Rng1>,
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typename I2 = uncvref_t<I2_>,
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CONCEPT_REQUIRES_(InputRange<Rng1>() && InputIterator<I2>() &&
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IndirectlySwappable<I1, I2>())>
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tagged_pair<tag::in1(I1), tag::in2(I2)>
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operator()(Rng1 && rng1, I2_ && begin2) const
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{
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return (*this)(begin(rng1), end(rng1), (I2_ &&)begin2);
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}
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template<typename Rng1, typename Rng2,
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typename I1 = iterator_t<Rng1>,
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typename I2 = iterator_t<Rng2>,
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CONCEPT_REQUIRES_(InputRange<Rng1>() && InputRange<Rng2>() &&
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IndirectlySwappable<I1, I2>())>
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tagged_pair<
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tag::in1(safe_iterator_t<Rng1>),
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tag::in2(safe_iterator_t<Rng2>)>
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operator()(Rng1 && rng1, Rng2 && rng2) const
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{
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return (*this)(begin(rng1), end(rng1), begin(rng2), end(rng2));
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}
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};
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/// \sa `swap_ranges_fn`
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/// \ingroup group-algorithms
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RANGES_INLINE_VARIABLE(with_braced_init_args<swap_ranges_fn>, swap_ranges)
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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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