Robert, test_class_info_load and test_class_info_save both passed for xml_archive but I have created a test (attached) which fails for version 0 xml archives. Can you try this please? It creates an object with version 0, writes it to an xml archive (currently hard-coded to drive c so I could check the output file easily), and then reads it back in. As mentioned before: when reading in the object, the version is passed in to serialize as 3, not 0 as it should be. For XML files: there is no version attribute for the object when the version is 0, so maybe this is the problem. Thanks Russell Robert Ramey wrote:
I rebuilt and reran the the tests "test_class_info_load" and "test_class_info_save" which are explicitly designed to test this functionality. I ran these test with XML archives. Do these tests pass for you? How is this situation different than yours? I updated the test sliightly so that the class version jumps from 2 to 4 - skipping over 3 so that a confusion between serialization library version and class version wouldn't be overlooked.
Robert Ramey
"Russell Hind" <rh_gmane@mac.com> wrote in message news:clacr8$u01$1@sea.gmane.org...
Robert Ramey wrote:
There is a confusion here. Check the manual section titled "Class Versioning"
There should be something like:
BOOST_CLASS_VERSION(Test_c, 99)
in your code. I don't remember what the maximum class version might be
but
it could be small like 255 for binary archives.
I did ask about this in the previous e-mail. I thought non-primitive types were, by default, versioned, i.e. if no BOOST_CLASS_VERSION is specified, they have a version of 0. Is this not the case?
Anyway, the code I posted still gives odd results if I set BOOST_CLASS_VERSION(Test_c, 0). Anything but 0 works, but zero gives the effects described previously, a 3 on the way back in, which is your archive version, not the class version.
Again, specifying no version works for text archives (haven't checked binary) but not for XML.
Thanks
Russell
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/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 // test_class_info_load.cpp: test implementation level trait // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . // 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 implementation level "object_class_info" // should pass compilation and execution #include <cstdio> #include <string> #include <fstream> #include <boost/static_assert.hpp> #include <boost/serialization/level.hpp> #include <boost/serialization/tracking.hpp> #include <boost/serialization/version.hpp> #include <boost/serialization/nvp.hpp> #include <boost/archive/tmpdir.hpp> #include <boost/preprocessor/stringize.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/archive/xml_oarchive.hpp> #include "test_tools.hpp" class A { public: template <typename ArchiveT> void serialize(ArchiveT& ar, const unsigned int version) { if (ArchiveT::is_loading::value) { BOOST_CHECK(version == 0); } } }; BOOST_CLASS_VERSION(A, 0) void in(const char *testfile, A& a) { { std::ofstream ofs(testfile); boost::archive::xml_oarchive xoa(ofs); xoa & BOOST_SERIALIZATION_NVP(a); } { std::ifstream ifs(testfile); boost::archive::xml_iarchive xia(ifs); xia & BOOST_SERIALIZATION_NVP(a); } } int test_main( int /* argc */, char* /* argv */[] ) { A a; std::string filename; filename += boost::archive::tmpdir(); filename += '/'; filename += BOOST_PP_STRINGIZE(testfile_); filename += BOOST_PP_STRINGIZE(BOOST_ARCHIVE_TEST); // in(filename.c_str(), a, b); in("c:\\test.xml", a); return boost::exit_success; } // EOF