Serialization of an instance of a Derived Template Class
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
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@lists.boost.org> wrote:
On 11/1/19 4:46 AM, Pritam Gharat via Boost-users wrote:
struct Bar_A_derived : public Bar_A_base ... struct Foo_A_base : public Bar_A_base ... struct ObjectNew { Bar_A_base *m_bar_a; Foo_A_base *m_foo_a; ... template<class Archive> void serialize(Archive & ar, const unsigned in version){ ar & m_bar_a; ar & m_foo_a; } }; Right?
sounds good
sounds good
Please let me know if I have missed something or I am doing something wrong.
That sounds about right.
participants (2)
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Pritam Gharat -
Robert Ramey