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241 lines
7.3 KiB
C++
241 lines
7.3 KiB
C++
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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// test_no_rtti.cpp
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// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
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// Use, modification and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// note: this program tests the inter-operability of different
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// extended typeinfo systems. In this example, one class is
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// identified using the default RTTI while the other uses a custom
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// system based on the export key.
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//
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// As this program uses RTTI for one of the types, the test will fail
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// on a system for which RTTI is not enabled or not existent.
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#include <fstream>
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#include <boost/static_assert.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/archive/archive_exception.hpp>
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#include "test_tools.hpp"
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#include <boost/serialization/nvp.hpp>
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#include <boost/serialization/base_object.hpp>
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#include <boost/serialization/export.hpp>
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#include <boost/serialization/type_info_implementation.hpp>
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#include <boost/serialization/extended_type_info_no_rtti.hpp>
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class polymorphic_base
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{
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friend class boost::serialization::access;
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template<class Archive>
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void serialize(Archive & /* ar */, const unsigned int /* file_version */){
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}
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public:
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virtual const char * get_key() const = 0;
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virtual ~polymorphic_base(){};
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};
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BOOST_IS_ABSTRACT(polymorphic_base)
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BOOST_CLASS_TYPE_INFO(
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polymorphic_base,
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extended_type_info_no_rtti<polymorphic_base>
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)
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// note: this type information method required assignment of a static
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// key available at precompile time
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namespace boost {
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namespace serialization {
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template<>
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const char * extended_type_info_no_rtti<const polymorphic_base>::type_key
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= "polymorphic_base";
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} // namespace serialization
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} // namespace boost
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class polymorphic_derived1;
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BOOST_CLASS_TYPE_INFO(
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polymorphic_derived1,
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extended_type_info_no_rtti<polymorphic_derived1>
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)
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class polymorphic_derived1 : public polymorphic_base
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{
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friend class boost::serialization::access;
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template<class Archive>
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void serialize(Archive &ar, const unsigned int /* file_version */){
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const boost::serialization::extended_type_info *eti
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= boost::serialization::type_info_implementation<polymorphic_derived1>
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::type::get_instance();
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BOOST_CHECK(eti->type_info_key
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== boost::serialization::extended_type_info_no_rtti<polymorphic_derived1>
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::type_info_key);
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ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(polymorphic_base);
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}
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public:
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virtual const char * get_key() const ;
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};
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// note: this type information method required assignment of a static
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// key available at precompile time
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namespace boost {
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namespace serialization {
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template<>
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const char * extended_type_info_no_rtti<const polymorphic_derived1>::type_key
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= "polymorphic_derived1";
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} // namespace serialization
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} // namespace boost
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const char * polymorphic_derived1::get_key() const {
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const boost::serialization::extended_type_info *eti
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= boost::serialization::type_info_implementation<polymorphic_derived1>
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::type::get_instance();
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BOOST_CHECK(eti->type_info_key
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== boost::serialization::type_info_implementation<polymorphic_derived1>
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::type::type_info_key
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);
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return eti->key;
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}
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BOOST_CLASS_EXPORT(polymorphic_derived1)
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class polymorphic_derived2 : public polymorphic_base
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{
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friend class boost::serialization::access;
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template<class Archive>
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void serialize(Archive &ar, const unsigned int /* file_version */){
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ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(polymorphic_base);
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}
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public:
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virtual const char * get_key() const ;
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};
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// note the mixing of type_info systems is supported.
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BOOST_CLASS_TYPE_INFO(
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polymorphic_derived2,
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boost::serialization::extended_type_info_typeid<polymorphic_derived2>
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)
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BOOST_CLASS_EXPORT(polymorphic_derived2)
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const char * polymorphic_derived2::get_key() const {
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// use the exported key as the identifier
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const boost::serialization::extended_type_info *eti
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= boost::serialization::type_info_implementation<polymorphic_derived2>
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::type::get_instance();
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return eti->key;
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}
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// save derived polymorphic class
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void save_derived(const char *testfile)
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{
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test_ostream os(testfile, TEST_STREAM_FLAGS);
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test_oarchive oa(os);
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polymorphic_derived1 *rd1 = new polymorphic_derived1;
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polymorphic_derived2 *rd2 = new polymorphic_derived2;
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oa << BOOST_SERIALIZATION_NVP(rd1);
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oa << BOOST_SERIALIZATION_NVP(rd2);
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// the above opereration registers the derived classes as a side
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// effect. Hence, instances can now be correctly serialized through
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// a base class pointer.
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polymorphic_base *rb1 = rd1;
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polymorphic_base *rb2 = rd2;
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oa << BOOST_SERIALIZATION_NVP(rb1);
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oa << BOOST_SERIALIZATION_NVP(rb2);
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delete rd1;
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delete rd2;
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}
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// save derived polymorphic class
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void load_derived(const char *testfile)
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{
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test_istream is(testfile, TEST_STREAM_FLAGS);
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test_iarchive ia(is);
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polymorphic_derived1 *rd1 = NULL;
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polymorphic_derived2 *rd2 = NULL;
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ia >> BOOST_SERIALIZATION_NVP(rd1);
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BOOST_CHECK_MESSAGE(
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boost::serialization::type_info_implementation<polymorphic_derived1>
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::type::get_instance()
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== boost::serialization::type_info_implementation<polymorphic_derived1>
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::type::get_derived_extended_type_info(*rd1),
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"restored pointer d1 not of correct type"
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);
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ia >> BOOST_SERIALIZATION_NVP(rd2);
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BOOST_CHECK_MESSAGE(
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boost::serialization::type_info_implementation<polymorphic_derived2>
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::type::get_instance()
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== boost::serialization::type_info_implementation<polymorphic_derived2>
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::type::get_derived_extended_type_info(*rd2),
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"restored pointer d2 not of correct type"
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);
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polymorphic_base *rb1 = NULL;
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polymorphic_base *rb2 = NULL;
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// the above opereration registers the derived classes as a side
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// effect. Hence, instances can now be correctly serialized through
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// a base class pointer.
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ia >> BOOST_SERIALIZATION_NVP(rb1);
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BOOST_CHECK_MESSAGE(
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rb1 == dynamic_cast<polymorphic_base *>(rd1),
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"serialized pointers not correctly restored"
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);
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BOOST_CHECK_MESSAGE(
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boost::serialization::type_info_implementation<polymorphic_derived1>
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::type::get_instance()
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== boost::serialization::type_info_implementation<polymorphic_base>
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::type::get_derived_extended_type_info(*rb1),
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"restored pointer b1 not of correct type"
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);
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ia >> BOOST_SERIALIZATION_NVP(rb2);
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BOOST_CHECK_MESSAGE(
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rb2 == dynamic_cast<polymorphic_base *>(rd2),
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"serialized pointers not correctly restored"
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);
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BOOST_CHECK_MESSAGE(
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boost::serialization::type_info_implementation<polymorphic_derived2>
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::type::get_instance()
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== boost::serialization::type_info_implementation<polymorphic_base>
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::type::get_derived_extended_type_info(*rb2),
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"restored pointer b2 not of correct type"
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);
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delete rb1;
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delete rb2;
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}
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int
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test_main( int /* argc */, char* /* argv */[] )
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{
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const char * testfile = tmpnam(NULL);
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BOOST_REQUIRE(NULL != testfile);
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save_derived(testfile);
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load_derived(testfile);
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std::remove(testfile);
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return boost::exit_success;
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}
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// EOF
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