pointers_data_members.hpp

[2005最新C++经典著作].C++ Programming.新手必看的学VC的奠基之著。

// Copyright (C) 2004 Arkadiy Vertleyb
// Use, modification and distribution is subject to the Boost Software
// License, Version 1.0. (http://www.boost.org/LICENSE_1_0.txt)

#ifndef BOOST_TYPEOF_POINTERS_DATA_MEMBERS_HPP_INCLUDED
#define BOOST_TYPEOF_POINTERS_DATA_MEMBERS_HPP_INCLUDED

#include <boost/spirit/typeof/concatenate.hpp>
#include <boost/spirit/typeof/encode_decode.hpp>

#include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP()

namespace boost
{
    namespace type_of
    {
        namespace
        {
            enum {PTR_DATA_MEM_ID = BOOST_TYPEOF_UNIQUE_ID()};

            template<class V, class P0, class P1> 
            struct encode_type_impl<V, P0 P1::*>
            {
                typedef BOOST_TYPEOF_ENCODE_PARAMS(2, PTR_DATA_MEM_ID) type;
            };

            template<class Iter> 
            struct decode_type_impl<mpl::size_t<PTR_DATA_MEM_ID>, Iter>
            {
                typedef Iter iter0;
                BOOST_TYPEOF_DECODE_PARAMS(2)

                template<class T> struct workaround{
                    typedef p0 T::* type;
                };

                typedef typename workaround<p1>::type type;
                typedef iter2 iter;
            };
        }
    }
}

#endif//BOOST_TYPEOF_POINTERS_DATA_MEMBERS_HPP_INCLUDED