1 #ifndef BOOST_SERIALIZATION_TRAITS_HPP

     2 #define BOOST_SERIALIZATION_TRAITS_HPP

     3 

     4 // MS compatible compilers support #pragma once

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

     6 # pragma once

     7 #endif

     8 

     9 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8

    10 // traits.hpp:

    11 

    12 // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 

    13 // Use, modification and distribution is subject to the Boost Software

    14 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at

    15 // http://www.boost.org/LICENSE_1_0.txt)

    16 

    17 //  See http://www.boost.org for updates, documentation, and revision history.

    18 

    19 // This header is used to apply serialization traits to templates.  The

    20 // standard system can't be used for platforms which don't support

    21 // Partial Templlate Specialization.  

    22 

    23 // The motivation for this is the Name-Value Pair (NVP) template.

    24 // it has to work the same on all platforms in order for archives

    25 // to be portable accross platforms.

    26 

    27 #include <boost/config.hpp>

    28 #include <boost/static_assert.hpp>

    29 

    30 #include <boost/mpl/int.hpp>

    31 #include <boost/serialization/level_enum.hpp>

    32 #include <boost/serialization/tracking_enum.hpp>

    33 

    34 namespace boost {

    35 namespace serialization {

    36 

    37 // common base class used to detect appended traits class

    38 struct basic_traits {};

    39 

    40 template <class T>

    41 struct extended_type_info_impl;

    42 

    43 template<

    44     class T, 

    45     int Level, 

    46     int Tracking,

    47     unsigned int Version = 0,

    48     class ETII = extended_type_info_impl< T >

    49 >

    50 struct traits : public basic_traits {

    51     BOOST_STATIC_ASSERT(Version == 0 || Level >= object_class_info);

    52     BOOST_STATIC_ASSERT(Tracking == track_never || Level >= object_serializable);

    53     typedef BOOST_DEDUCED_TYPENAME mpl::int_<Level> level;

    54     typedef BOOST_DEDUCED_TYPENAME mpl::int_<Tracking> tracking;

    55     typedef BOOST_DEDUCED_TYPENAME mpl::int_<Version> version;

    56     typedef ETII type_info_implementation;

    57 };

    58 

    59 } // namespace serialization

    60 } // namespace boost

    61 

    62 #endif // BOOST_SERIALIZATION_TRAITS_HPP