Dr. Pooyan Dadvand
International Center for Numerical Methods in Engineering - CIMNE
Campus Norte, Edificio C1
c/ Gran Capitán s/n
08034 Barcelona, Spain
Tel:        (+34) 93 401 56 96
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On 08/27/2010 07:55 PM, Robert Ramey wrote:
Pooyan Dadvand wrote:
Do you know any boost tool to get the pointer to the derive class
like this:

template<class TArchiveType>
MyContainer::serialize(TArchiveType &rArchive, const unsigned int

Version, MyData);
I'm not going to tell you how to do this because doing this won't help you !

Reread the section of the documentation which addresses serialization of 
pointers.  It
discusses the serialization of an object through a pointer to the virtual 
base class

I have already read it!
so all you have to do is

base_class *m_bc; // where base class is a virtual base class.

ar << m_dc

I'm already using this for serializing a derived class and it works fine, but it's not the case here.
The serialization library keeps track of the "true" (most derived) class and 
call the serialize
function on THAT class.  You don't have to do anything to get what you want. 
It keep track of "serialize" method with two parameters and I need an additional parameter!
I would
suggest you look through the tests/examples (there are 50+ in the library!) 
and find
one that does this and study it.

Or tell me how the following code in oserializer.hpp can be used for
my case

the above example ar << m_dc will in fact use that code.

One time we had a similar thread.  The final result was

"Oh - this is really simple - once you see it!"

So if what you want to do is NOT simple, you're doing it wrong.
Of course I'm doing something wrong, for this reason I'm asking the correct way. however I don't see an easy solution to my problem looking to the examples for the very standard cases.
Start make taking one of your types
serialize it
make a small test to prove that it works.
I have already done this.
Add the next higher type
and repeat
Exactly the methodology I'm using.
make a test which does the above through a pointer
and repeat
I have already done this and it works.
add a virtual base class
and repeat
I have already serialized several classes in my library with pointer to the base classes and they are working.

But it's not what I'm asking. What I'm asking is a very special case in which the serialize don't have enough information to deal with my void* in std::pair<VariableData*, void*> and for this reason I need the help of VariableData derived class to give the serialization the necessary type information. Actually I get the following error using the normal serialization method as you suggest:

/usr/local/include/boost/archive/detail/oserializer.hpp:465: error: ‘void*’ is not a pointer-to-object type

Robert Ramey 

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