///////////////////////////////////////////////////////////////////////////////

// any.hpp

//

//  Copyright 2007 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)



#ifndef BOOST_XPRESSIVE_DETAIL_UTILITY_ANY_HPP_EAN_11_19_2005

#define BOOST_XPRESSIVE_DETAIL_UTILITY_ANY_HPP_EAN_11_19_2005



#include <boost/version.hpp>



#if BOOST_VERSION >= 103300



// In Boost 1.33+, we have a cons list in Fusion, so just include it.



# if BOOST_VERSION >= 103500

#  include <boost/fusion/include/any.hpp> // Boost 1.35+ has Fusion2

# else

#  include <boost/spirit/fusion/algorithm/any.hpp> // Fusion1

# endif



#else



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

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

# include <boost/spirit/fusion/iterator/equal_to.hpp>

# include <boost/mpl/bool.hpp>

# include <boost/spirit/fusion/iterator/equal_to.hpp>

# include <boost/spirit/fusion/iterator/next.hpp>

# include <boost/spirit/fusion/iterator/deref.hpp>



namespace boost { namespace fusion

{



    namespace detail

    {

        template <typename First, typename Last, typename F>

        inline bool

        any(First const&, Last const&, F const&, mpl::true_)

        {

            return false;

        }



        template <typename First, typename Last, typename F>

        inline bool

        any(First const& first, Last const& last, F const& f, mpl::false_)

        {

            if(f(*first))

                return true;

            return detail::any(fusion::next(first), last, f

              , meta::equal_to<BOOST_DEDUCED_TYPENAME meta::next<First>::type, Last>());

        }

    }



    namespace meta

    {

        template <typename Sequence, typename F>

        struct any

        {

            typedef bool type;

        };

    }



    namespace function

    {

        struct any

        {

            template <typename Sequence, typename F>

            struct apply

            {

                typedef bool type;

            };



            template <typename Sequence, typename F>

            inline bool

            operator()(Sequence const& seq, F const& f) const

            {

                return detail::any(

                        fusion::begin(seq)

                      , fusion::end(seq)

                      , f

                      , meta::equal_to<

                            BOOST_DEDUCED_TYPENAME meta::begin<Sequence>::type

                          , BOOST_DEDUCED_TYPENAME meta::end<Sequence>::type>());

            }



            template <typename Sequence, typename F>

            inline bool

            operator()(Sequence& seq, F const& f) const

            {

                return detail::any(

                        fusion::begin(seq)

                      , fusion::end(seq)

                      , f

                      , meta::equal_to<

                            BOOST_DEDUCED_TYPENAME meta::begin<Sequence>::type

                          , BOOST_DEDUCED_TYPENAME meta::end<Sequence>::type>());

            }

        };

    }



    function::any const any = function::any();

}}



#endif



#endif

