Loïc Joly wrote:

Hello,

Let's say I have a structure suce as this :

class A {}; class B : public A {}; class C : public B {};

Currently, I have some code that looks like this :

template<class Archive> void C::serialize(Archive &ar, const unsigned int version) { ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(B); }

However, if my class B is "empty", that is it adds no data to A, is this possible as an optimisation to just write :

It should be

template<class Archive> void C::serialize(Archive &ar, const unsigned int version) { ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(A); }

Or will this break something ?

I doubt it - if you look at the definition of base_object you'll find its really just a cast to the base class. Robert Ramey