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

// modifier.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_STATIC_MODIFIER_HPP_EAN_10_04_2005

#define BOOST_XPRESSIVE_DETAIL_STATIC_MODIFIER_HPP_EAN_10_04_2005



// MS compatible compilers support #pragma once

#if defined(_MSC_VER) && (_MSC_VER >= 1020)

# pragma once

# pragma warning(push)

# pragma warning(disable : 4510) // default constructor could not be generated

# pragma warning(disable : 4610) // user defined constructor required

#endif



#include <boost/xpressive/detail/detail_fwd.hpp>

#include <boost/xpressive/proto/traits.hpp>

#include <boost/xpressive/regex_constants.hpp>



namespace boost { namespace xpressive { namespace detail

{



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

    // modifier

    template<typename Modifier>

    struct modifier_op

    {

        typedef regex_constants::syntax_option_type opt_type;



        template<typename Expr>

        struct apply

        {

            typedef typename proto::binary_expr<

                modifier_tag

              , typename proto::terminal<Modifier>::type

              , typename proto::result_of::as_arg<Expr const>::type

            >::type type;

        };



        template<typename Expr>

        typename apply<Expr>::type const

        operator ()(Expr const &expr) const

        {

            typename apply<Expr>::type that = {{this->mod_}, proto::as_arg(expr)};

            return that;

        }



        operator opt_type() const

        {

            return this->opt_;

        }



        Modifier mod_;

        opt_type opt_;

    };



}}}



#if defined(_MSC_VER) && (_MSC_VER >= 1020)

# pragma warning(pop)

#endif



#endif

