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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("initialized", 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("initialized", 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_ |