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

// regex_matcher.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_CORE_MATCHER_REGEX_MATCHER_HPP_EAN_10_04_2005

#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_REGEX_MATCHER_HPP_EAN_10_04_2005



// MS compatible compilers support #pragma once

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

# pragma once

#endif



#include <boost/mpl/assert.hpp>

#include <boost/xpressive/regex_error.hpp>

#include <boost/xpressive/regex_constants.hpp>

#include <boost/xpressive/detail/core/regex_impl.hpp>

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

#include <boost/xpressive/detail/core/quant_style.hpp>

#include <boost/xpressive/detail/core/state.hpp>

#include <boost/xpressive/detail/core/adaptor.hpp>



namespace boost { namespace xpressive { namespace detail

{



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

    // regex_matcher

    //

    template<typename BidiIter>

    struct regex_matcher

      : quant_style<quant_variable_width, unknown_width::value, false>

    {

        regex_impl<BidiIter> impl_;



        regex_matcher(shared_ptr<regex_impl<BidiIter> > const &impl)

          : impl_()

        {

            this->impl_.xpr_ = impl->xpr_;

            this->impl_.traits_ = impl->traits_;

            this->impl_.mark_count_ = impl->mark_count_;

            this->impl_.hidden_mark_count_ = impl->hidden_mark_count_;



            ensure(this->impl_.xpr_, regex_constants::error_badref, "bad regex reference");

        }



        template<typename Next>

        bool match(match_state<BidiIter> &state, Next const &next) const

        {

            // regex_matcher is used for embeding a dynamic regex in a static regex. As such,

            // Next will always point to a static regex.

            BOOST_MPL_ASSERT((is_static_xpression<Next>));



            // wrap the static xpression in a matchable interface

            xpression_adaptor<reference_wrapper<Next const>, matchable<BidiIter> > adaptor(boost::cref(next));

            return push_context_match(this->impl_, state, adaptor);

        }

    };



}}}



#endif

