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 callboost::fusion::detail::reverse_cons26 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 callboost::fusion::detail::reverse_cons39 static State const &call(nil_ const &, State const &state = State()) 40 { 41 return state; 42 } 43 }; 44 }}} 45 46 #endif 47