Using Interfaces for Object Oriented Primitives

// (C) Copyright Jonathan Turkanis 2004.
// 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.)

// Disclaimer: Not a Boost library.

#ifndef BOOST_IDL_DETAIL_IDL_BEGIN_HPP_INCLUDED
#define BOOST_IDL_DETAIL_IDL_BEGIN_HPP_INCLUDED

#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif

#include <boost/interfaces/detail/util.hpp>
#include <boost/interfaces/detail/macros/befriend_template.hpp>
#include <boost/interfaces/access.hpp>
#include <boost/mpl/identity.hpp>
#include <boost/mpl/list.hpp>
#include <boost/preprocessor/cat.hpp>

#define BOOST_IDL_BEGIN_TEMPLATE(name, arity) \
    struct BOOST_PP_CAT(name, _interface_impl_) { \
      friend class ::boost::interfaces::access; \
      BOOST_STATIC_CONSTANT(int, start_line_ = __LINE__); \
    public: \
      template<typename Derived_, typename Flags_, typename Base_> \
      struct generator_impl : Base_ { \
      BOOST_IDL_PRIVATE: \
        template<typename NNN_, typename Dummy_ = int> \
        struct tracker_ { typedef void type; }; \
      public: \
        struct superinterfaces_ \
            : ::boost::mpl::identity< ::boost::mpl::list< \
    /**/

#define BOOST_IDL_BEGIN(name) BOOST_IDL_BEGIN_TEMPLATE(name, 0)
    /**/

#endif // #ifndef BOOST_IDL_DETAIL_IDL_BEGIN_HPP_INCLUDED