Júlio.

2011/8/5 Júlio Hoffimann <julio.hoffimann@gmail.com>

Thank you for reply Robert,

Yes, i've compiled the code using GCC 4.5. Now i see the warning you mentioned:

warning:40: type qualifiers ignored on function return type

I've used BOOST_SERIALIZATION_ASSUME_ABSTRACT because the library documentation is a little confusing with the "abstract class" term. But note that even commenting out the macro, the problem remains. What is the warning about on line 40? I'm missing something trivial? :-)

I've also tried to misplace the BOOST_EXPORT_CLASS macro among the source lines, but without success. Do you have any hint in what is happening?

Appreciate your help,

Júlio.

2011/8/5 Robert Ramey <ramey@rrsd.com>

Júlio Hoffimann wrote:
> Dear all,
>
>
> I'm using Boost 1.45...
>
>
> I've read Boost.Serialization docs so many times and can't understand
> why my testcase is not working as expected. According to the
> following three links, we need to address serialization of derived
> classes with "abstract" base class by using boost macros:
>
>
> http://www.boost.org/doc/libs/1_47_0/libs/serialization/doc/traits.html#export
>
>
> http://www.boost.org/doc/libs/1_47_0/libs/serialization/doc/special.html#export
>
>
> http://www.boost.org/doc/libs/1_47_0/libs/serialization/doc/traits.html#abstract
>
>
> I did my testcase ( http://codepad.org/6ETp1Ac0 ) completely based on
> the demo:
> http://www.boost.org/doc/libs/1_47_0/libs/serialization/example/demo.cpp

Have you tried to build adn run the demo as it is? Does it work?

Robert Ramey

>
>
> Compiling and running shows that the derived class archive contains
> just the base class data members. What is happening? How can i solve
> this problem?

One obvious problem is that the base class is not abstract. To be abstract,

a base class must have atleast one virtual function in the form

virtual my_function() = 0;

The ASSUME_ABSTRACT macro doesn't mark it abstract to the

compiler - it marks it abstract to the boost type-traites system.

I know it's quirky and unclear - but I see no way to make it bullet proof.

I'm sort of surprised/disappointed that this doesn't give a compile time

warning. What compiler do you use?

Robert Ramey

>
>
> I really appreciate any help,
> Júlio.
>

_______________________________________________
Boost-users mailing list
Boost-users@lists.boost.org
http://lists.boost.org/mailman/listinfo.cgi/boost-users