Hi, I'm having a problem serializing a multi-index container. Serialization used to work fine, until I added a second (non-unique) key to the container. I've managed to distill the problem down to a small bit of code, so here it is. Uncomment the #define to see the segfault at serialization time in action, leave it commented and the example code works fine. I'm clearly missing something subtle (or not-so-subtle) here, but I don't have the first clue what it might be. Suggestions are enormously appreciated. Regards, tob ---------------------------------------------------------------------------- // A simple program to illustrate my crazy serialization problem with // multi-index containers. Compiled with: // g++ -I/usr/local/include/boost-1_33_1/ boost_test.c++ \ // -lboost_serialization -o boost_test // // When two keys are specified for FooSet, serialization segfaults. When // only one key is present, we're fine. Uncomment the line below to see // the segfault in action. // #define KILL_SERIALIZATION #include <fstream> #include <string> #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> #include <boost/multi_index_container.hpp> #include <boost/multi_index/member.hpp> #include <boost/multi_index/ordered_index.hpp> struct Foo { Foo() : _id(0) { } Foo(unsigned id) : _id(id) { } unsigned _id; std::string _name; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & _id; ar & _name; } }; // Container for class Foo struct foo_id_tag { }; struct foo_name_tag { }; typedef boost::multi_index_container< Foo, boost::multi_index::indexed_by< boost::multi_index::ordered_unique< boost::multi_index::tag<foo_id_tag>, BOOST_MULTI_INDEX_MEMBER(Foo, unsigned, _id) #if defined(KILL_SERIALIZATION) >, boost::multi_index::ordered_non_unique< boost::multi_index::tag<foo_name_tag>, BOOST_MULTI_INDEX_MEMBER(Foo, std::string, _name) #endif > >
FooSet;
void save(const FooSet& fooSet) { std::ofstream ofs("foo"); boost::archive::text_oarchive oa(ofs); oa << fooSet; } int main(int argc, char** argv) { FooSet foo_set; foo_set.insert(Foo(100)); foo_set.insert(Foo(150)); save(foo_set); return 0; }