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- /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
- // test_diamond.cpp
- // (C) Copyright 2002-2009 Vladimir Prus and Robert Ramey.
- // Use, modification and distribution is subject to the Boost Software
- // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- // test of serialization library for diamond inheritence situations
- #include <cstddef> // NULL
- #include <fstream>
- #include <iostream>
- #include <boost/config.hpp>
- #include <cstdio> // remove
- #if defined(BOOST_NO_STDC_NAMESPACE)
- namespace std{
- using ::remove;
- }
- #endif
- #include "test_tools.hpp"
- #include <boost/serialization/map.hpp>
- #include <boost/serialization/utility.hpp>
- #include <boost/serialization/split_member.hpp>
- #include <boost/serialization/tracking.hpp>
- #include <boost/serialization/base_object.hpp>
- #include <boost/serialization/nvp.hpp>
- #include <boost/serialization/export.hpp>
- int save_count = 0; // used to detect when base class is saved multiple times
- int load_count = 0; // used to detect when base class is loaded multiple times
- class base {
- public:
- base() : i(0) {}
- base(int i) : i(i)
- {
- m[i] = "text";
- }
- template<class Archive>
- void save(Archive &ar, const unsigned int /* file_version */) const
- {
- std::cout << "Saving base\n";
- ar << BOOST_SERIALIZATION_NVP(i);
- ar << BOOST_SERIALIZATION_NVP(m);
- ++save_count;
- }
- template<class Archive>
- void load(Archive & ar, const unsigned int /* file_version */)
- {
- std::cout << "Restoring base\n";
- ar >> BOOST_SERIALIZATION_NVP(i);
- ar >> BOOST_SERIALIZATION_NVP(m);
- ++load_count;
- }
- BOOST_SERIALIZATION_SPLIT_MEMBER()
- bool operator==(const base& another) const
- {
- return i == another.i && m == another.m;
- }
- // make polymorphic by marking at least one function virtual
- virtual ~base() {};
- private:
- int i;
- std::map<int, std::string> m;
- };
- // note: the default is for object tracking to be performed if and only
- // if and object of the corresponding class is anywhere serialized
- // through a pointer. In this example, that doesn't occur so
- // by default, the shared base object wouldn't normally be tracked.
- // This would leave to multiple save/load operation of the data in
- // this shared base class. This wouldn't cause an error, but it would
- // be a waste of time. So set the tracking behavior trait of the base
- // class to always track serialized objects of that class. This permits
- // the system to detect and elminate redundent save/load operations.
- // (It is concievable that this might someday be detected automatically
- // but for now, this is not done so we have to rely on the programmer
- // to specify this trait)
- BOOST_CLASS_TRACKING(base, track_always)
- class derived1 : virtual public base {
- public:
- template<class Archive>
- void save(Archive &ar, const unsigned int /* file_version */) const
- {
- std::cout << "Saving derived1\n";
- ar << BOOST_SERIALIZATION_BASE_OBJECT_NVP(base);
- }
- template<class Archive>
- void load(Archive & ar, const unsigned int /* file_version */)
- {
- std::cout << "Restoring derived1\n";
- ar >> BOOST_SERIALIZATION_BASE_OBJECT_NVP(base);
- }
- BOOST_SERIALIZATION_SPLIT_MEMBER()
- };
- class derived2 : virtual public base {
- public:
- template<class Archive>
- void save(Archive &ar, const unsigned int /* file_version */) const
- {
- std::cout << "Saving derived2\n";
- ar << BOOST_SERIALIZATION_BASE_OBJECT_NVP(base);
- }
- template<class Archive>
- void load(Archive & ar, const unsigned int /* file_version */)
- {
- std::cout << "Restoring derived2\n";
- ar >> BOOST_SERIALIZATION_BASE_OBJECT_NVP(base);
- }
- BOOST_SERIALIZATION_SPLIT_MEMBER()
- };
- class final : public derived1, public derived2 {
- public:
- final() {}
- final(int i) : base(i) {}
- template<class Archive>
- void save(Archive &ar, const unsigned int /* file_version */) const
- {
- std::cout << "Saving final\n";
- ar << BOOST_SERIALIZATION_BASE_OBJECT_NVP(derived1);
- ar << BOOST_SERIALIZATION_BASE_OBJECT_NVP(derived2);
- }
- template<class Archive>
- void load(Archive & ar, const unsigned int /* file_version */)
- {
- std::cout << "Restoring final\n";
- ar >> BOOST_SERIALIZATION_BASE_OBJECT_NVP(derived1);
- ar >> BOOST_SERIALIZATION_BASE_OBJECT_NVP(derived2);
- }
- BOOST_SERIALIZATION_SPLIT_MEMBER()
- };
- BOOST_CLASS_EXPORT(final)
- int
- test_main( int /* argc */, char* /* argv */[] )
- {
- const char * testfile = boost::archive::tmpnam(NULL);
- BOOST_REQUIRE(NULL != testfile);
-
- const final b(3);
- {
- test_ostream ofs(testfile, TEST_STREAM_FLAGS);
- test_oarchive oa(ofs);
- oa << boost::serialization::make_nvp("b", b);
- }
- final b2;
- {
- test_istream ifs(testfile, TEST_STREAM_FLAGS);
- test_iarchive ia(ifs);
- ia >> boost::serialization::make_nvp("b2", b2);
- }
- BOOST_CHECK(1 == save_count);
- BOOST_CHECK(1 == load_count);
- BOOST_CHECK(b2 == b);
- std::remove(testfile);
- // do the same test with pointers
- testfile = boost::archive::tmpnam(NULL);
- BOOST_REQUIRE(NULL != testfile);
- save_count = 0;
- load_count = 0;
- const base* bp = new final( 3 );
- {
- test_ostream ofs(testfile);
- test_oarchive oa(ofs);
- oa << BOOST_SERIALIZATION_NVP(bp);
- }
- base* bp2;
- {
- test_istream ifs(testfile);
- test_iarchive ia(ifs);
- ia >> BOOST_SERIALIZATION_NVP(bp2);
- }
- BOOST_CHECK(1 == save_count);
- BOOST_CHECK(1 == load_count);
- BOOST_CHECK(*bp2 == *bp);
- delete bp;
- std::remove(testfile);
- return EXIT_SUCCESS;
- }
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