ceph/src/boost/libs/hana/include/boost/hana/detail/nested_than.hpp

   1 /*!
   2 @file
   3 Defines `boost::hana::detail::nested_than`.
   4
   5 @copyright Louis Dionne 2013-2016
   6 Distributed under the Boost Software License, Version 1.0.
   7 (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
   8  */
   9
  10 #ifndef BOOST_HANA_DETAIL_NESTED_THAN_HPP
  11 #define BOOST_HANA_DETAIL_NESTED_THAN_HPP
  12
  13 #include <boost/hana/detail/nested_than_fwd.hpp>
  14
  15 #include <boost/hana/config.hpp>
  16 #include <boost/hana/functional/flip.hpp>
  17 #include <boost/hana/functional/partial.hpp>
  18
  19
  20 BOOST_HANA_NAMESPACE_BEGIN namespace detail {
  21     //! @cond
  22     template <typename Algorithm>
  23     template <typename X>
  24     constexpr decltype(auto) nested_than_t<Algorithm>::operator()(X&& x) const
  25     { return hana::partial(hana::flip(Algorithm{}), static_cast<X&&>(x)); }
  26     //! @endcond
  27 } BOOST_HANA_NAMESPACE_END
  28
  29 #endif // !BOOST_HANA_DETAIL_NESTED_THAN_HPP