Re: [Boost-users] Serializing a Method

From: Robert Ramey (ramey_at_[hidden])
Date: 2007-10-07 02:58:07

at forum wrote:
> On 10/5/07, Robert Ramey <ramey_at_[hidden]> wrote:
>> a) I don't see a serialize function for Action.  Until this exists,
>> it's not a serializble type.  Hence it will not compile.
>
> Ok thank you.
>
>> b) The following is not symetrical and this is almost always a
>> programmer error
>>
>>> oa << BOOST_SERIALIZATION_NVP(this);
>> ...
>>> ia >> BOOST_SERIALIZATION_NVP(*this);
>
> I know that, but if I put
> oa << BOOST_SERIALIZATION_NVP(*this); I get a run time error, and when
> I put ia >> BOOST_SERIALIZATION_NVP(this) I get a run time error.
>
> If I do my save and load fucntion output my class, its ok and I can
> have symetrical Serialize.
>
> any Idea?

BOOST_SERIALIZATION_NVP(this) is not suitable for "this"

I believe you want something like:

void Save(const char * filename, const CASetMemberCommand<gps_position,int> 
&c)
{
std::ofstream ofs(filename);
assert(ofs.good());
boost::archive::xml_oarchive oa(ofs);
oa << BOOST_SERIALIZATION_NVP(c);
}

void Load( const char * filename, CASetMemberCommand<gps_position,int> & c)
{
std::ifstream ifs(filename);
assert(ifs.good());
boost::archive::xml_iarchive ia(ifs);
ia >> BOOST_SERIALIZATION_NVP(c);
}

int main(int argc, char *argv[])
{

gps_position pos(32,52,25.0f);
CASetMemberCommand<gps_position,int> cmd(&pos,&gps_position::SetMinutes,25);
CASetMemberCommand<gps_position,int> 
cmd4(&pos,&gps_position::SetDegrees,25);
cmd.Execute();
SaveCommand(cmd,"D:/test.xml");

Save("D:/Test2.xml", cmd);
CASetMemberCommand<gps_position,int> cmd2;
Load("D:/Test2.xml", cmd);

return 0;
}

or maybe something simpler like:

int main(int argc, char *argv[])
{

gps_position pos(32,52,25.0f);
const CASetMemberCommand<gps_position,int> 
cmd(&pos,&gps_position::SetMinutes,25);
cmd.Execute();

{
std::ofstream ofs("D:/test.xml"););
assert(ofs.good());
boost::archive::xml_oarchive oa(ofs);
oa << BOOST_SERIALIZATION_NVP(cmd);
}

CASetMemberCommand<gps_position,int> cmd2;
{
std::ifstream ifs("D:/test.xml");
assert(ifs.good());
boost::archive::xml_iarchive ia(ifs);
ia >> BOOST_SERIALIZATION_NVP(cmd2);
}

return 0;
}