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

    Copyright (c) 1999-2003 Jaakko Järvi

    Copyright (c) 2001-2003 Joel de Guzman



    Use, modification and distribution is subject to 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(FUSION_SEQUENCE_LESS_HPP)

#define FUSION_SEQUENCE_LESS_HPP



#include <boost/spirit/fusion/sequence/begin.hpp>

#include <boost/spirit/fusion/sequence/end.hpp>

#include <boost/spirit/fusion/sequence/detail/sequence_less.hpp>



#ifdef FUSION_COMFORMING_COMPILER

#include <boost/utility/enable_if.hpp>

#include <boost/spirit/fusion/sequence/is_sequence.hpp>

#include <boost/spirit/fusion/sequence/as_fusion_sequence.hpp>

#endif



namespace boost { namespace fusion

{

    template <typename Seq1, typename Seq2>

    inline bool

    operator<(sequence_base<Seq1> const& a, sequence_base<Seq2> const& b)

    {

        return detail::sequence_less<Seq1 const, Seq2 const>::

            call(

                fusion::begin(a.cast())

              , fusion::begin(b.cast())

            );

    }



#ifdef FUSION_COMFORMING_COMPILER



    template <typename Seq1, typename Seq2>

    inline typename disable_if<fusion::is_sequence<Seq2>, bool>::type

    operator<(sequence_base<Seq1> const& a, Seq2 const& b)

    {

        return a < as_fusion_sequence<Seq2>::convert_const(b);

    }



    template <typename Seq1, typename Seq2>

    inline typename disable_if<fusion::is_sequence<Seq1>, bool>::type

    operator<(Seq1 const& a, sequence_base<Seq2> const& b)

    {

        return as_fusion_sequence<Seq1>::convert_const(a) < b;

    }



#endif

}}



#endif

