1#ifndef BOOST_ARCHIVE_DETAIL_CHECK_HPP
2#define BOOST_ARCHIVE_DETAIL_CHECK_HPP
3
4// MS compatible compilers support #pragma once
5#if defined(_MSC_VER)
6# pragma once
7#if !defined(__clang__)
8#pragma inline_depth(255)
9#pragma inline_recursion(on)
10#endif
11#endif
12
13#if defined(__MWERKS__)
14#pragma inline_depth(255)
15#endif
16
17/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
18// check.hpp: interface for serialization system.
19
20// (C) Copyright 2009 Robert Ramey - http://www.rrsd.com .
21// Use, modification and distribution is subject to the Boost Software
22// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
23// http://www.boost.org/LICENSE_1_0.txt)
24
25// See http://www.boost.org for updates, documentation, and revision history.
26
27#include <boost/config.hpp>
28
29#include <boost/static_assert.hpp>
30#include <boost/type_traits/is_const.hpp>
31
32#include <boost/mpl/eval_if.hpp>
33#include <boost/mpl/or.hpp>
34#include <boost/mpl/equal_to.hpp>
35#include <boost/mpl/int.hpp>
36#include <boost/mpl/not.hpp>
37#include <boost/mpl/greater.hpp>
38#include <boost/mpl/assert.hpp>
39
40#include <boost/serialization/static_warning.hpp>
41#include <boost/serialization/version.hpp>
42#include <boost/serialization/level.hpp>
43#include <boost/serialization/tracking.hpp>
44#include <boost/serialization/wrapper.hpp>
45
46namespace boost {
47namespace archive {
48namespace detail {
49
50// checks for objects
51
52template<class T>
53inline void check_object_level(){
54 typedef
55 typename mpl::greater_equal<
56 serialization::implementation_level< T >,
57 mpl::int_<serialization::primitive_type>
58 >::type typex;
59
60 // trap attempts to serialize objects marked
61 // not_serializable
62 BOOST_STATIC_ASSERT(typex::value);
63}
64
65template<class T>
66inline void check_object_versioning(){
67 typedef
68 typename mpl::or_<
69 typename mpl::greater<
70 serialization::implementation_level< T >,
71 mpl::int_<serialization::object_serializable>
72 >,
73 typename mpl::equal_to<
74 serialization::version< T >,
75 mpl::int_<0>
76 >
77 > typex;
78 // trap attempts to serialize with objects that don't
79 // save class information in the archive with versioning.
80 BOOST_STATIC_ASSERT(typex::value);
81}
82
83template<class T>
84inline void check_object_tracking(){
85 // presume it has already been determined that
86 // T is not a const
87 BOOST_STATIC_ASSERT(! boost::is_const< T >::value);
88 typedef typename mpl::equal_to<
89 serialization::tracking_level< T >,
90 mpl::int_<serialization::track_never>
91 >::type typex;
92 // saving an non-const object of a type not marked "track_never)
93
94 // may be an indicator of an error usage of the
95 // serialization library and should be double checked.
96 // See documentation on object tracking. Also, see the
97 // "rationale" section of the documentation
98 // for motivation for this checking.
99
100 BOOST_STATIC_WARNING(typex::value);
101}
102
103// checks for pointers
104
105template<class T>
106inline void check_pointer_level(){
107 // we should only invoke this once we KNOW that T
108 // has been used as a pointer!!
109 typedef
110 typename mpl::or_<
111 typename mpl::greater<
112 serialization::implementation_level< T >,
113 mpl::int_<serialization::object_serializable>
114 >,
115 typename mpl::not_<
116 typename mpl::equal_to<
117 serialization::tracking_level< T >,
118 mpl::int_<serialization::track_selectively>
119 >
120 >
121 > typex;
122 // Address the following when serializing to a pointer:
123
124 // a) This type doesn't save class information in the
125 // archive. That is, the serialization trait implementation
126 // level <= object_serializable.
127 // b) Tracking for this type is set to "track selectively"
128
129 // in this case, indication that an object is tracked is
130 // not stored in the archive itself - see level == object_serializable
131 // but rather the existence of the operation ar >> T * is used to
132 // infer that an object of this type should be tracked. So, if
133 // you save via a pointer but don't load via a pointer the operation
134 // will fail on load without given any valid reason for the failure.
135
136 // So if your program traps here, consider changing the
137 // tracking or implementation level traits - or not
138 // serializing via a pointer.
139 BOOST_STATIC_WARNING(typex::value);
140}
141
142template<class T>
143void inline check_pointer_tracking(){
144 typedef typename mpl::greater<
145 serialization::tracking_level< T >,
146 mpl::int_<serialization::track_never>
147 >::type typex;
148 // serializing an object of a type marked "track_never" through a pointer
149 // could result in creating more objects than were saved!
150 BOOST_STATIC_WARNING(typex::value);
151}
152
153template<class T>
154inline void check_const_loading(){
155 typedef
156 typename mpl::or_<
157 typename boost::serialization::is_wrapper< T >,
158 typename mpl::not_<
159 typename boost::is_const< T >
160 >
161 >::type typex;
162 // cannot load data into a "const" object unless it's a
163 // wrapper around some other non-const object.
164 BOOST_STATIC_ASSERT(typex::value);
165}
166
167} // detail
168} // archive
169} // boost
170
171#endif // BOOST_ARCHIVE_DETAIL_CHECK_HPP
172

source code of boost/libs/serialization/include/boost/archive/detail/check.hpp