53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
/* Copyright 2023 Joaquin M Lopez Munoz.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying 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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* See https://www.boost.org/libs/unordered for library home page.
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*/
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#ifndef BOOST_UNORDERED_DETAIL_FOA_TUPLE_ROTATE_RIGHT_HPP
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#define BOOST_UNORDERED_DETAIL_FOA_TUPLE_ROTATE_RIGHT_HPP
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#include <boost/mp11/algorithm.hpp>
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#include <boost/mp11/integer_sequence.hpp>
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#include <tuple>
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#include <utility>
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namespace boost{
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namespace unordered{
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namespace detail{
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namespace foa{
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template<typename Tuple>
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using tuple_rotate_right_return_type=mp11::mp_rotate_right_c<
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typename std::remove_cv<typename std::remove_reference<Tuple>::type>::type,
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1
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>;
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template<std::size_t... Is,typename Tuple>
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tuple_rotate_right_return_type<Tuple>
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tuple_rotate_right_aux(mp11::index_sequence<Is...>,Tuple&& x)
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{
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return tuple_rotate_right_return_type<Tuple>{
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std::get<(Is+sizeof...(Is)-1)%sizeof...(Is)>(std::forward<Tuple>(x))...};
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}
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template<typename Tuple>
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tuple_rotate_right_return_type<Tuple> tuple_rotate_right(Tuple&& x)
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{
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using RawTuple=typename std::remove_cv<
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typename std::remove_reference<Tuple>::type>::type;
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return tuple_rotate_right_aux(
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mp11::make_index_sequence<std::tuple_size<RawTuple>::value>{},
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std::forward<Tuple>(x));
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}
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} /* namespace foa */
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} /* namespace detail */
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} /* namespace unordered */
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} /* namespace boost */
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#endif
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