Re: Serialization of an instance of a Derived Template Class

From: Pritam Gharat (pritam01gharat_at_[hidden])
Date: 2019-11-01 11:46:54

Hi Robert,

I have gone through the documentation. Below is the list of things I did
for serialization and deserialization.

   1. Define serialize function in the class whose instances I wish to
   serialize. In my example it is ObjectNew which has pointers of type Bar_A
   and Foo_A. Both are base classes and the pointers of these pointers point
   to instances of theri derived classes. So I have serialize function defined
   for Bar_A, Foo_A and all their derived classes (which includes Foo_C,
   Foo_D, Bar_B, Bar_C).
   2. Call to boost::serialization::base_object in the serialize function
   of derived classes which in turn calls serialize function of the
   corresponding base classes.
   3. For classes with non-defualt constructor, I have over-ridden
   save_construct_data and load_construct_data functions.
   4. Registering derived classes whose instances are pointed by pointers
   with types of their base classes using BOOST_CLASS_EXPORT.
   5. And finally use boost::archive::text_oarchive and
   boost::archive::text_iarchive for serialization and deserialization.

Please let me know if I have missed something or I am doing something wrong.

Pritam Gharat

On Thu, Oct 31, 2019 at 5:13 PM Robert Ramey via Boost-users <
boost-users_at_[hidden]> wrote:

> Have you read the documentation?
>
> Robert Ramey
>
> On 10/31/19 2:47 AM, Pritam Gharat via Boost-users wrote:
> > Hi,
> >
> > I am using Boost to serialize pointers of a base class which points to
> > instances  of a derived template class. I am using boost 1.7.0 and
> > running it on Ubuntu 16.04.
> >
> > The source code of the example is available at
> > https://github.com/PritamMG/Boost-Serialization-Example
> >
> > My example has a base class Bar_A (definition available in
> > include/Abstract.hpp) which has a virtual function toStr(). It has two
> > derived classes Bar_B and Bar_C. Bar_B is a template class.
> > I have registered the derived classes in sc/Test.cpp. Class ObjectNew
> > (include/Object.hpp) has a member pointer of type Bar_A which points to
> > instances of classes Bar_B and Bar_C.
> >
> > I get an error as "unregistered class".  I am not sure for which class
> > do I get this error message.
> >
> > There is also an issue of non-default. If Bar_B does not have a default
> > constructor, save_construct_data and load_construct_data are over-ridden
> > and there I run into an error "too many template-parameter-lists".
> >
> > How do I define these functions?
> >
> > Thanks,
> > Pritam
> >
> >
> >
> >
> > _______________________________________________
> > Boost-users mailing list
> > Boost-users_at_[hidden]
> > https://lists.boost.org/mailman/listinfo.cgi/boost-users
> >
>
>
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