I've tried to searched for this in the archive and in google, but I can't seem to find the answer.&nbsp; <br><br>I'm having trouble using boost::serialization with its non-intrusive.&nbsp; In parituclar, I can't really figure out how to serialize derived classes that do not have default constructors in an non-intrusive way.
<br><br>class A;<br>class B : A;<br>class C : A;<br><br>Suppose B and C do not have a default constructor.&nbsp; And I would like to serialize:<br><br>A* b = new B(10);<br>A* c = new C(&quot;something&quot;);<br><br>Due to the restriction of the API that I can not change, all I have is the pointer to A.&nbsp; 
<br><br>I'm puzzled on how this can be done.&nbsp; From reading the documentation and source code, I think I need to override the load_construct_data and save_construct_data, such as:<br><br>template&lt;class Archive&gt;<br>inline void load_construct_data(Archive &amp;ar, 
<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; A *t, const unsigned int vers) {<br>}<br><br>template&lt;class Archive&gt;<br>inline void save_construct_data(Archive &amp;ar, <br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; A *t, const unsigned int vers) {<br><br>}<br><br>However, it seems like the memory is allocated already by the archiver with the size of type A before calling the load_construct_data.&nbsp; How then can I allcoate an object with type B or C?
<br><br>There are examples on how this can be done intrusively, but since I don't have control of the source, I really want to do it non-intrusively.<br><br>Any help is greatly appreciated.<br><br>Will<br>