1 | /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 |
2 | |
3 | // (C) Copyright 2002-4 Pavel Vozenilek . |
4 | // Use, modification and distribution is subject to the Boost Software |
5 | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
6 | // http://www.boost.org/LICENSE_1_0.txt) |
7 | |
8 | // Provides non-intrusive serialization for boost::optional. |
9 | |
10 | #ifndef BOOST_SERIALIZATION_OPTIONAL_HPP_ |
11 | #define BOOST_SERIALIZATION_OPTIONAL_HPP_ |
12 | |
13 | #if defined(_MSC_VER) |
14 | # pragma once |
15 | #endif |
16 | |
17 | #include <boost/config.hpp> |
18 | |
19 | #include <boost/archive/detail/basic_iarchive.hpp> |
20 | |
21 | #include <boost/optional.hpp> |
22 | #include <boost/serialization/item_version_type.hpp> |
23 | #include <boost/serialization/split_free.hpp> |
24 | #include <boost/serialization/level.hpp> |
25 | #include <boost/serialization/nvp.hpp> |
26 | #include <boost/serialization/version.hpp> |
27 | #include <boost/serialization/detail/stack_constructor.hpp> |
28 | |
29 | // function specializations must be defined in the appropriate |
30 | // namespace - boost::serialization |
31 | namespace boost { |
32 | namespace serialization { |
33 | |
34 | template<class Archive, class T> |
35 | void save( |
36 | Archive & ar, |
37 | const boost::optional< T > & t, |
38 | const unsigned int /*version*/ |
39 | ){ |
40 | const bool tflag = t.is_initialized(); |
41 | ar << boost::serialization::make_nvp(name: "initialized" , t: tflag); |
42 | if (tflag){ |
43 | const boost::serialization::item_version_type item_version(version< T >::value); |
44 | #if 0 |
45 | const boost::archive::library_version_type library_version( |
46 | ar.get_library_version() |
47 | }; |
48 | if(boost::archive::library_version_type(3) < library_version){ |
49 | ar << BOOST_SERIALIZATION_NVP(item_version); |
50 | } |
51 | #else |
52 | ar << BOOST_SERIALIZATION_NVP(item_version); |
53 | #endif |
54 | ar << boost::serialization::make_nvp("value" , *t); |
55 | } |
56 | } |
57 | |
58 | template<class Archive, class T> |
59 | void load( |
60 | Archive & ar, |
61 | boost::optional< T > & t, |
62 | const unsigned int /*version*/ |
63 | ){ |
64 | bool tflag; |
65 | ar >> boost::serialization::make_nvp(name: "initialized" , t&: tflag); |
66 | if (tflag){ |
67 | boost::serialization::item_version_type item_version(0); |
68 | boost::archive::library_version_type library_version( |
69 | ar.get_library_version() |
70 | ); |
71 | if(boost::archive::library_version_type(3) < library_version){ |
72 | // item_version is handled as an attribute so it doesnt need an NVP |
73 | ar >> BOOST_SERIALIZATION_NVP(item_version); |
74 | } |
75 | detail::stack_construct<Archive, T> aux(ar, item_version); |
76 | ar >> boost::serialization::make_nvp("value" , aux.reference()); |
77 | t.reset(aux.reference()); |
78 | } |
79 | else { |
80 | t.reset(); |
81 | } |
82 | } |
83 | |
84 | template<class Archive, class T> |
85 | void serialize( |
86 | Archive & ar, |
87 | boost::optional< T > & t, |
88 | const unsigned int version |
89 | ){ |
90 | boost::serialization::split_free(ar, t, version); |
91 | } |
92 | |
93 | } // serialization |
94 | } // namespace boost |
95 | |
96 | #endif // BOOST_SERIALIZATION_OPTIONAL_HPP_ |
97 | |