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3rdparty/boost_1_81_0/boost/hana/reverse_fold.hpp 1.13 KB
63e88f80   Hu Chunming   提交三方库
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  /*!
  @file
  Defines `boost::hana::reverse_fold`.
  
  Copyright Louis Dionne 2013-2022
  Distributed under the Boost Software License, Version 1.0.
  (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
   */
  
  #ifndef BOOST_HANA_REVERSE_FOLD_HPP
  #define BOOST_HANA_REVERSE_FOLD_HPP
  
  #include <boost/hana/fwd/reverse_fold.hpp>
  
  #include <boost/hana/config.hpp>
  #include <boost/hana/fold_right.hpp>
  #include <boost/hana/functional/flip.hpp>
  
  
  namespace boost { namespace hana {
      //! @cond
      template <typename Xs, typename S, typename F>
      constexpr decltype(auto) reverse_fold_t::operator()(Xs&& xs, S&& s, F&& f) const {
          return hana::fold_right(static_cast<Xs&&>(xs),
                                  static_cast<S&&>(s),
                                  hana::flip(static_cast<F&&>(f)));
      }
  
      template <typename Xs, typename F>
      constexpr decltype(auto) reverse_fold_t::operator()(Xs&& xs, F&& f) const {
          return hana::fold_right(static_cast<Xs&&>(xs),
                                  hana::flip(static_cast<F&&>(f)));
      }
      //! @endcond
  }} // end namespace boost::hana
  
  #endif // !BOOST_HANA_REVERSE_FOLD_HPP