-> [boost-users] Zitat von Jeff Flinn <TriumphSprint2000@hotmail.com>:

Is it expected that the calls to register_type need to be identical on both the save and load side of a serialization exchange?

yes it is. register_type writes class info to your archive, which has to be read in the same order.

oa.register_type(static_cast<A*>(0));

oa.register_type<A>(); -Stefan

Jeff Flinn wrote:

Is it expected that the calls to register_type need to be identical on both the save and load side of a serialization exchange?

It is required.

I thought I read that the registration facility sets up a map.

It does. But the mapping has to be loaded in the order it was created

But the following caused a archive_exception.

struct C {}; struct B : C {}; struct A : B {};

--- save

boost::archive::text_oarchive oa(some_ostream);

oa.register_type(static_cast<A*>(0)); oa.register_type(static_cast<B*>(0)); oa.register_type(static_cast<C*>(0));

oa & aC_ptr;

--- load

boost::archive::text_iarchive ia(some_istream);

ia.register_type(static_cast<B*>(0)); ia.register_type(static_cast<A*>(0)); ia.register_type(static_cast<C*>(0));

oa & aC_ptr;

Thanks, Jeff

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