ceph/src/boost/libs/fusion/include/boost/fusion/container/list/detail/reverse_cons.hpp

   1 /*=============================================================================
   2     Copyright (c) 2011 Eric Niebler
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 ==============================================================================*/
   7 #if !defined(BOOST_FUSION_REVERSE_CONS_HPP_INCLUDED)
   8 #define BOOST_FUSION_REVERSE_CONS_HPP_INCLUDED
   9
  10 #include <boost/fusion/support/config.hpp>
  11 #include <boost/fusion/container/list/cons_fwd.hpp>
  12
  13 namespace boost { namespace fusion { namespace detail
  14 {
  15     ////////////////////////////////////////////////////////////////////////////
  16     template<typename Cons, typename State = nil_>
  17     struct reverse_cons;
  18
  19     template<typename Car, typename Cdr, typename State>
  20     struct reverse_cons<cons<Car, Cdr>, State>
  21     {
  22         typedef reverse_cons<Cdr, cons<Car, State> > impl;
  23         typedef typename impl::type type;
  24
  25         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  26         static type call(cons<Car, Cdr> const &cons, State const &state = State())
  27         {
  28             typedef fusion::cons<Car, State> cdr_type;
  29             return impl::call(cons.cdr, cdr_type(cons.car, state));
  30         }
  31     };
  32
  33     template<typename State>
  34     struct reverse_cons<nil_, State>
  35     {
  36         typedef State type;
  37
  38         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  39         static State const &call(nil_ const &, State const &state = State())
  40         {
  41             return state;
  42         }
  43     };
  44 }}}
  45
  46 #endif