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1 | /* Copyright 2003-2013 Joaquin M Lopez Munoz. |
2 | * Distributed under the Boost Software License, Version 1.0. | |
3 | * (See accompanying file LICENSE_1_0.txt or copy at | |
4 | * http://www.boost.org/LICENSE_1_0.txt) | |
5 | * | |
6 | * See http://www.boost.org/libs/multi_index for library home page. | |
7 | */ | |
8 | ||
9 | #ifndef BOOST_MULTI_INDEX_DETAIL_SERIALIZATION_VERSION_HPP | |
10 | #define BOOST_MULTI_INDEX_DETAIL_SERIALIZATION_VERSION_HPP | |
11 | ||
12 | #if defined(_MSC_VER) | |
13 | #pragma once | |
14 | #endif | |
15 | ||
16 | #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */ | |
17 | #include <boost/serialization/split_member.hpp> | |
18 | #include <boost/serialization/version.hpp> | |
19 | ||
20 | namespace boost{ | |
21 | ||
22 | namespace multi_index{ | |
23 | ||
24 | namespace detail{ | |
25 | ||
26 | /* Helper class for storing and retrieving a given type serialization class | |
27 | * version while avoiding saving the number multiple times in the same | |
28 | * archive. | |
29 | * Behavior undefined if template partial specialization is not supported. | |
30 | */ | |
31 | ||
32 | template<typename T> | |
33 | struct serialization_version | |
34 | { | |
35 | serialization_version(): | |
36 | value(boost::serialization::version<serialization_version>::value){} | |
37 | ||
38 | serialization_version& operator=(unsigned int x){value=x;return *this;}; | |
39 | ||
40 | operator unsigned int()const{return value;} | |
41 | ||
42 | private: | |
43 | friend class boost::serialization::access; | |
44 | ||
45 | BOOST_SERIALIZATION_SPLIT_MEMBER() | |
46 | ||
47 | template<class Archive> | |
48 | void save(Archive&,const unsigned int)const{} | |
49 | ||
50 | template<class Archive> | |
51 | void load(Archive&,const unsigned int version) | |
52 | { | |
53 | this->value=version; | |
54 | } | |
55 | ||
56 | unsigned int value; | |
57 | }; | |
58 | ||
59 | } /* namespace multi_index::detail */ | |
60 | ||
61 | } /* namespace multi_index */ | |
62 | ||
63 | namespace serialization { | |
64 | template<typename T> | |
65 | struct version<boost::multi_index::detail::serialization_version<T> > | |
66 | { | |
67 | BOOST_STATIC_CONSTANT(int,value=version<T>::value); | |
68 | }; | |
69 | } /* namespace serialization */ | |
70 | ||
71 | } /* namespace boost */ | |
72 | ||
73 | #endif |