Re: [Boost-users] serialization: problem with abstract base class

From: Robert Ramey (ramey_at_[hidden])
Date: 2006-02-27 12:13:36

"RIVASSEAU Jean Noel" <JN.RIVASSEAU_at_[hidden]> wrote in message 
news:87F60F7FA02FF749AFB02BD9FCAA6B04DA7AA2_at_naserv31.nanterre.oberthurcs.com...
Hello

The following code (attached) demonstrate a problem that I have. I am trying 
to serialize via pointer to base class (MObject) which is abstract. The docs 
say that a compile error will occur when trying to do that.

***
I think it should if your compiler can't support it.  But I can't say for 
sure.

I don't have any compile time errors emitted but the build fails at link 
time (it does not instantiate the save/load code for the abstract base 
class).

The solutions provided in the docs are: write BOOST_IS_ABSTRACT(MObject): I 
did that and nothing changes;

Or

Implement is_abstract for your compiler. I do not understand what this 
means. Can you help me out ?

Currently the only workaround I have is to not make the base class abstract, 
but I would like it to be abstract.

***
its hard for me to follow what's going on here.  One thing I did notice is 
that the I didn't see
<boost/serialization/base_object.hpp> included in the places where it is 
used.  I'm not
sure if that's significant.

Robert Ramey

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