[serialization] unregistered_class exception that wasn't occurring before

older
[shared_ptr] implicit conversion...

Igor R

18 Oct 2011 18 Oct '11

9:44 p.m.

Hello, I'm serializing the following type: (pseudo-definition) multi_index_container< variant< shared_ptr, shared_ptr, etc...

...

It works well when I make and load archives with the current version of my app, but when I try to open an archive made by the pervious version it throws unregistered_class for one of my classes. The both versions use boost 1.47, and the differences between them seem to me absolutely unrelated to serialization (as far as I can see). Unfortunately I can't provide here code snippets, so my question is theoretical: what could break the backward compatibility in such a way? What should I look into? Thanks.

Show replies by date

Robert Ramey

19 Oct 19 Oct

2:14 a.m.

New subject: [serialization] unregistered_class exception thatwasn't occurring before

Igor R wrote:

...

Hello,

I'm serializing the following type: (pseudo-definition) multi_index_container< variant< shared_ptr, shared_ptr, etc...

...
It works well when I make and load archives with the current version of my app, but when I try to open an archive made by the pervious version it throws unregistered_class for one of my classes. The both versions use boost 1.47, and the differences between them seem to me absolutely unrelated to serialization (as far as I can see).

Unfortunately I can't provide here code snippets, so my question is theoretical: what could break the backward compatibility in such a way? What should I look into?

Thanks.

Robert Ramey

2:16 a.m.

New subject: [serialization] unregistered_class exception thatwasn't occurring before

Igor R wrote:

...

It works well when I make and load archives with the current version of my app, but when I try to open an archive made by the pervious version it throws unregistered_class for one of my classes.

was the "previous version" made with the same version of the serialization library?

...

The both versions use boost 1.47, and the differences between them seem to me absolutely unrelated to serialization (as far as I can see).

What are the differences? If the previous version didn't serialize via a pointer and the current one does, this could happen. Otherwise I wouldn't expect this. Robert Ramey

...

Unfortunately I can't provide here code snippets, so my question is theoretical: what could break the backward compatibility in such a way? What should I look into?

Thanks.

Igor R

7:18 a.m.

New subject: [serialization] unregistered_class exception thatwasn't occurring before

...

was the "previous version" made with the same version of the serialization library?

As I mentioned, the both versions were built with boost 1.47.

...

What are the differences? If the previous version didn't serialize via a pointer and the current one does, this could happen. Otherwise I wouldn't expect this.

The serialization code didn't change at all. In the both versions it serializes the structure I described in the previous message. The classes changed a bit, but I can't realise how it could affect the serialization. The xml item made by the previous version look like this: <item> <which>5</which> <value class_id="64" tracking_level="0" version="1"> <px class_id="65" tracking_level="1" version="0" object_id="_116"> <info>etc... The same item from an archive made by the new version: <item> <which>5</which> <value class_id="84" tracking_level="0" version="1"> <px class_id="85" tracking_level="1" version="0" object_id="_84"> <info>etc... When it comes to , i.e. to the raw ptr within the shared_ptr<>, it can't find the class.

Robert Ramey

5:04 p.m.

New subject: [serialization] unregistered_class exception thatwasn't occurring before

Igor R wrote:

...

The serialization code didn't change at all.

maybe - but the what could change is the following. Som class might now being doing ar < p where p is a pointer where as before this was never done. This would affect the archive even without changing the serialization code itself. Look for that. Robert Ramey

...

In the both versions it serializes the structure I described in the previous message. The classes changed a bit, but I can't realise how it could affect the serialization. The xml item made by the previous version look like this: <item> <which>5</which> <value class_id="64" tracking_level="0" version="1"> <px class_id="65" tracking_level="1" version="0" object_id="_116"> <info>etc...

The same item from an archive made by the new version: <item> <which>5</which> <value class_id="84" tracking_level="0" version="1"> <px class_id="85" tracking_level="1" version="0" object_id="_84"> <info>etc...

When it comes to , i.e. to the raw ptr within the shared_ptr<>, it can't find the class. _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

4876

Age (days ago)

4877

Last active (days ago)

List overview

Download

4 comments

2 participants

participants (2)

Igor R
Robert Ramey