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GL Profile Suite / boost_1_51_0 / boost / fusion / container / list / detail / reverse_cons.hpp

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/*=============================================================================
    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