libs/serialization/test/test_no_rtti.cpp

   1 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
   2 // test_no_rtti.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 // note: this program tests the inter-operability of different
  10 // extended typeinfo systems.  In this example, one class is
  11 // identified using the default RTTI while the other uses a custom
  12 // system based on the export key.
  13 //
  14 // As this program uses RTTI for one of the types, the test will fail
  15 // on a system for which RTTI is not enabled or not existent.
  16
  17 #include <cstddef>
  18 #include <fstream>
  19 #include <iostream>
  20
  21 #include <boost/config.hpp>
  22 #include <cstdio> // remove
  23 #if defined(BOOST_NO_STDC_NAMESPACE)
  24 namespace std{
  25     using ::remove;
  26 }
  27 #endif
  28
  29 #include <boost/serialization/type_info_implementation.hpp>
  30 #include <boost/serialization/export.hpp>
  31 #include <boost/serialization/nvp.hpp>
  32
  33 #include "test_tools.hpp"
  34
  35 #include <boost/archive/polymorphic_oarchive.hpp>
  36 #include <boost/archive/polymorphic_iarchive.hpp>
  37
  38 #include "polymorphic_base.hpp"
  39
  40 #include "polymorphic_derived1.hpp"
  41
  42 #include "polymorphic_derived2.hpp"
  43
  44 // save derived polymorphic class
  45 void save_derived(const char *testfile)
  46 {
  47     test_ostream os(testfile, TEST_STREAM_FLAGS);
  48     test_oarchive oa_implementation(os, TEST_ARCHIVE_FLAGS);
  49     boost::archive::polymorphic_oarchive & oa_interface = oa_implementation;
  50
  51     polymorphic_derived1 *rd1 = new polymorphic_derived1;
  52     polymorphic_derived2 *rd2 = new polymorphic_derived2;
  53
  54     std::cout << "saving polymorphic_derived1 (no_rtti)\n";
  55     oa_interface << BOOST_SERIALIZATION_NVP(rd1);
  56
  57     std::cout << "saving polymorphic_derived2\n";
  58     oa_interface << BOOST_SERIALIZATION_NVP(rd2);
  59
  60     const polymorphic_base *rb1 =  rd1;
  61     polymorphic_base *rb2 = rd2;
  62     std::cout << "saving polymorphic_derived1 (no_rtti) through base (rtti)\n";
  63     oa_interface << BOOST_SERIALIZATION_NVP(rb1);
  64     std::cout << "saving polymorphic_derived2 through base\n";
  65     oa_interface << BOOST_SERIALIZATION_NVP(rb2);
  66
  67     delete rd1;
  68     delete rd2;
  69 }
  70
  71 void load_derived(const char *testfile)
  72 {
  73     test_istream is(testfile, TEST_STREAM_FLAGS);
  74     test_iarchive  ia_implementation(is, TEST_ARCHIVE_FLAGS);
  75     boost::archive::polymorphic_iarchive & ia_interface = ia_implementation;
  76
  77     polymorphic_derived1 *rd1 = NULL;
  78     polymorphic_derived2 *rd2 = NULL;
  79
  80     std::cout << "loading polymorphic_derived1 (no_rtti)\n";
  81     ia_interface >> BOOST_SERIALIZATION_NVP(rd1);
  82     BOOST_CHECK_MESSAGE(
  83         boost::serialization::type_info_implementation<
  84             polymorphic_derived1
  85         >::type::get_const_instance()
  86         ==
  87         * boost::serialization::type_info_implementation<
  88             polymorphic_derived1
  89         >::type::get_const_instance().get_derived_extended_type_info(*rd1)
  90         ,
  91         "restored pointer d1 not of correct type"
  92     );
  93
  94     std::cout << "loading polymorphic_derived2\n";
  95     ia_interface >> BOOST_SERIALIZATION_NVP(rd2);
  96     BOOST_CHECK_MESSAGE(
  97         boost::serialization::type_info_implementation<
  98             polymorphic_derived2
  99         >::type::get_const_instance()
 100         ==
 101         * boost::serialization::type_info_implementation<
 102             polymorphic_derived2
 103         >::type::get_const_instance().get_derived_extended_type_info(*rd2)
 104         ,
 105         "restored pointer d2 not of correct type"
 106     );
 107     polymorphic_base *rb1 = NULL;
 108     polymorphic_base *rb2 = NULL;
 109
 110     // the above opereration registers the derived classes as a side
 111     // effect.  Hence, instances can now be correctly serialized through
 112     // a base class pointer.
 113     std::cout << "loading polymorphic_derived1 (no_rtti) through base (no_rtti)\n";
 114     ia_interface >> BOOST_SERIALIZATION_NVP(rb1);
 115
 116     BOOST_CHECK_MESSAGE(
 117         rb1 == dynamic_cast<polymorphic_base *>(rd1),
 118         "serialized pointers not correctly restored"
 119     );
 120
 121     BOOST_CHECK_MESSAGE(
 122         boost::serialization::type_info_implementation<
 123             polymorphic_derived1
 124         >::type::get_const_instance()
 125         ==
 126         * boost::serialization::type_info_implementation<
 127             polymorphic_base
 128         >::type::get_const_instance().get_derived_extended_type_info(*rb1)
 129         ,
 130         "restored pointer b1 not of correct type"
 131     );
 132     std::cout << "loading polymorphic_derived2 through base (no_rtti)\n";
 133     ia_interface >> BOOST_SERIALIZATION_NVP(rb2);
 134
 135     BOOST_CHECK_MESSAGE(
 136         rb2 ==  dynamic_cast<polymorphic_base *>(rd2),
 137         "serialized pointers not correctly restored"
 138     );
 139     BOOST_CHECK_MESSAGE(
 140         boost::serialization::type_info_implementation<
 141             polymorphic_derived2
 142         >::type::get_const_instance()
 143         ==
 144         * boost::serialization::type_info_implementation<
 145             polymorphic_base
 146         >::type::get_const_instance().get_derived_extended_type_info(*rb2)
 147         ,
 148         "restored pointer b2 not of correct type"
 149     );
 150     delete rb1;
 151     delete rb2;
 152 }
 153
 154 int
 155 test_main( int /* argc */, char* /* argv */[] )
 156 {
 157     const char * testfile = boost::archive::tmpnam(NULL);
 158     BOOST_REQUIRE(NULL != testfile);
 159
 160     save_derived(testfile);
 161     load_derived(testfile);
 162     std::remove(testfile);
 163     return EXIT_SUCCESS;
 164 }
 165
 166 // EOF