1 | /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 |
2 | // test_derived.cpp |
3 | |
4 | // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . |
5 | // Use, modification and distribution is subject to the Boost Software |
6 | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
7 | // http://www.boost.org/LICENSE_1_0.txt) |
8 | |
9 | // should pass compilation and execution |
10 | |
11 | #include <cstddef> // NULL |
12 | #include <fstream> |
13 | |
14 | #include <cstdio> // remove |
15 | #include <boost/config.hpp> |
16 | #if defined(BOOST_NO_STDC_NAMESPACE) |
17 | namespace std{ |
18 | using ::remove; |
19 | } |
20 | #endif |
21 | |
22 | #include <boost/archive/archive_exception.hpp> |
23 | #include "test_tools.hpp" |
24 | |
25 | #include <boost/serialization/base_object.hpp> |
26 | #include <boost/serialization/type_info_implementation.hpp> |
27 | |
28 | class base |
29 | { |
30 | friend class boost::serialization::access; |
31 | template<class Archive> |
32 | void serialize(Archive & /* ar */, const unsigned int /* file_version */){ |
33 | } |
34 | public: |
35 | virtual ~base(){}; |
36 | }; |
37 | |
38 | class derived1 : public base |
39 | { |
40 | friend class boost::serialization::access; |
41 | template<class Archive> |
42 | void serialize(Archive &ar, const unsigned int /* file_version */){ |
43 | ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(base); |
44 | } |
45 | }; |
46 | |
47 | class derived2 : public base |
48 | { |
49 | friend class boost::serialization::access; |
50 | template<class Archive> |
51 | void serialize(Archive &ar, const unsigned int /* file_version */){ |
52 | ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(base); |
53 | } |
54 | }; |
55 | |
56 | // save non-polymorphic classes through a base class pointer |
57 | void save_derived(const char *testfile) |
58 | { |
59 | test_ostream os(testfile, TEST_STREAM_FLAGS); |
60 | test_oarchive oa(os, TEST_ARCHIVE_FLAGS); |
61 | |
62 | // registration not necessary when serializing the most derived pointer |
63 | derived1 *d1 = new derived1; |
64 | derived2 *d2 = new derived2; |
65 | oa << BOOST_SERIALIZATION_NVP(d1) << BOOST_SERIALIZATION_NVP(d2); |
66 | |
67 | // upcasting non-polymorphic pointers may not lead to the expected |
68 | // result. In the current type id system |
69 | base *b1 = d1; |
70 | base *b2 = d2; |
71 | |
72 | // Warning, the current type id system does not yield true |
73 | // type id for non-polymorphic types |
74 | const boost::serialization::extended_type_info & this_type |
75 | = boost::serialization::type_info_implementation<base>::type |
76 | ::get_const_instance(); |
77 | // retrieve the true type of the object pointed to |
78 | const boost::serialization::extended_type_info & true_type |
79 | = * boost::serialization::type_info_implementation<base>::type |
80 | ::get_const_instance().get_derived_extended_type_info(t: *b1); |
81 | |
82 | BOOST_WARN_MESSAGE( |
83 | !(this_type == true_type), |
84 | "current type id system does not support non-polymorphic types" |
85 | ); |
86 | |
87 | oa << BOOST_SERIALIZATION_NVP(b1); |
88 | oa << BOOST_SERIALIZATION_NVP(b2); |
89 | |
90 | delete d1; |
91 | delete d2; |
92 | } |
93 | |
94 | // save non-polymorphic classes through a base class pointer |
95 | void load_derived(const char *testfile) |
96 | { |
97 | test_istream is(testfile, TEST_STREAM_FLAGS); |
98 | test_iarchive ia(is, TEST_ARCHIVE_FLAGS); |
99 | |
100 | // registration not necessary when serializing the most derived pointer |
101 | derived1 *d1 = NULL; |
102 | derived2 *d2 = NULL; |
103 | ia >> BOOST_SERIALIZATION_NVP(d1) >> BOOST_SERIALIZATION_NVP(d2); |
104 | |
105 | // upcasting non-polymorphic pointers may not lead to the expected |
106 | // result. In the current type id system |
107 | base *b1 = NULL; |
108 | base *b2 = NULL; |
109 | |
110 | // note: this will produce incorrect results for non-polymorphic classes |
111 | ia >> BOOST_SERIALIZATION_NVP(b1); |
112 | ia >> BOOST_SERIALIZATION_NVP(b2); |
113 | |
114 | // Warning, the current type id system does not yield true |
115 | // type id for non-polymorphic types |
116 | const boost::serialization::extended_type_info & this_type |
117 | = boost::serialization::type_info_implementation<base>::type |
118 | ::get_const_instance(); |
119 | // retrieve the true type of the object pointed to |
120 | const boost::serialization::extended_type_info & true_type |
121 | = * boost::serialization::type_info_implementation<base>::type |
122 | ::get_const_instance().get_derived_extended_type_info(t: *b1); |
123 | |
124 | BOOST_WARN_MESSAGE( |
125 | ! (this_type == true_type), |
126 | "current type id system does fails for non-polymorphic types" |
127 | ); |
128 | |
129 | BOOST_CHECK(b1 == static_cast<base *>(d1)); |
130 | BOOST_CHECK(b2 == static_cast<base *>(d2)); |
131 | |
132 | delete d1; |
133 | delete d2; |
134 | } |
135 | |
136 | int |
137 | test_main( int /* argc */, char* /* argv */[] ) |
138 | { |
139 | const char * testfile = boost::archive::tmpnam(NULL); |
140 | BOOST_REQUIRE(NULL != testfile); |
141 | |
142 | save_derived(testfile); |
143 | load_derived(testfile); |
144 | std::remove(filename: testfile); |
145 | return EXIT_SUCCESS; |
146 | } |
147 | |
148 | // EOF |
149 | |