[Boost-users] Re : Problem with boost serialization: shared_ptr

From: Michel Pineau (mpineau1963_at_[hidden])
Date: 2007-06-15 12:15:37

Hello,

I think I have found something, but I would like you to confirm, in the get_helper (boost/serialization/shared_ptr.hpp), if the variable sph (See code: shared_ptr<void> sph;) represent the most derived class, and if we have mulitple inheritance, then we cannot cast (See code: return * static_cast<H *>(sph.get());) a void * to a base class. It has to be cast to the derived class first and then to the base class. What do you think? 
 
template<class Archive, class H>
H &
get_helper(Archive & ar){
extended_type_info * eti = type_info_implementation<H>::type::get_instance();
shared_ptr<void> sph;
ar.lookup_helper(eti, sph);
if(NULL == sph.get()){
sph = shared_ptr<H>(new H);
ar.insert_helper(eti, sph);
}
return * static_cast<H *>(sph.get());
}
Thanks again,
Michel :)



----- Message initial ----
De : Robert Ramey <ramey_at_[hidden]>
À : boost-users_at_[hidden]
Envoyé le : jeudi 14 juin 2007, 18 h 43 min 51 s
Objet : Re: [Boost-users] Problem with boost serialization: shared_ptr


I looked over your code at it looks like it shoud be OK to me.

I Tried to compile it with my VC 71 system using boost 1.3 (cvs HEAD)
and I got an error at the following line:

class ABC : public IA, public IB, public IC

\BoostHead\libs\serialization\test\test_zmisc.cpp(85) : fatal error C1001: 
INTERNAL COMPILER ERROR
(compiler file 'msc1.cpp', line 2701)
Please choose the Technical Support command on the Visual C++
Help menu, or open the Technical Support help file for more information

which looks to me to be an artifact of the test system.  I'll look some more 
if I can get the chance.

Robert Ramey

"Michel Pineau" <mpineau1963_at_[hidden]> wrote in message 
news:[e-mail]...
Hello,
I'm trying to serialize many boost::shared_ptr to the same object but 
through different base classes. When I look at the boost::shared_ptr for the 
base classes they are not properly set. I created a simple example that show 
my problem. The test program output is: 



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