boost/fusion/container/list/detail/reverse_cons.hpp
/*=============================================================================
Copyright (c) 2011 Eric Niebler
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
==============================================================================*/
#if !defined(BOOST_FUSION_REVERSE_CONS_HPP_INCLUDED)
#define BOOST_FUSION_REVERSE_CONS_HPP_INCLUDED
#include <boost/fusion/container/list/cons_fwd.hpp>
namespace boost { namespace fusion { namespace detail
{
////////////////////////////////////////////////////////////////////////////
template<typename Cons, typename State = nil_>
struct reverse_cons;
template<typename Car, typename Cdr, typename State>
struct reverse_cons<cons<Car, Cdr>, State>
{
typedef reverse_cons<Cdr, cons<Car, State> > impl;
typedef typename impl::type type;
static type call(cons<Car, Cdr> const &cons, State const &state = State())
{
typedef fusion::cons<Car, State> cdr_type;
return impl::call(cons.cdr, cdr_type(cons.car, state));
}
};
template<typename State>
struct reverse_cons<nil_, State>
{
typedef State type;
static State const &call(nil_ const &, State const &state = State())
{
return state;
}
};
}}}
#endif