Kim Barrett wrote:
There are a few other warning messages if you care to know about
Brian Schrom wrote: them:
./boost/archive/polymorphic_iarchive.hpp:60: warning: 'class boost::archive::polymorphic_iarchive' has virtual functions but non-virtual destructor
At 9:04 PM -0700 9/29/06, Robert Ramey wrote:
This is explained in the code in the cited place. it turns out that for particular reasons, polymophic archives can't be destroyed through the base class pointer. For this reason, the destructor is marked "protected"
The explanation in that comment is:
... there is no way to forward to the "true" destructor.
I would have thought that simply making the polymorphic_[i,o]archive destructors virtual (as was discussed a few weeks ago when I brought up the problem of destructor slicing for these classes) would solve this problem. What am I overlooking?
Well, that's what I thought. Then I looked into it. When I tried it I got problems due the the fact that the most derived class is derived from multiple bases. see http://www.boost.org/libs/serialization/doc/class_diagram.html It's easy to see by making the change to "virtual" with your original example. I didn't see an easy way to fix it and I didn't see it as a big problem so I just punted. Robert Ramey