[Boost-bugs] [Boost C++ Libraries] #3212: Unregistered class exception on serialization should have more information

Subject: [Boost-bugs] [Boost C++ Libraries] #3212: Unregistered class exception on serialization should have more information
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-06-24 01:48:36

#3212: Unregistered class exception on serialization should have more information
--------------------------+-------------------------------------------------
 Reporter:  sohail        |       Owner:  ramey        
     Type:  Bugs          |      Status:  new          
Milestone:  Boost 1.40.0  |   Component:  serialization
  Version:  Boost 1.34.1  |    Severity:  Problem      
 Keywords:                |  
--------------------------+-------------------------------------------------
 If I am serializing a class by base-class pointer and it turns out to be
 unregistered, it would be extremely helpful if the code could add the
 typeid of the class to some sort of debug output. This can be disabled in
 release mode.

 I have just spent close to 4 hours debugging this in a maze of serialized
 classes with, I'm sorry to say, not very good unit tests.

 What I have done is added a local string variable, something like:
 {{{
   if(NULL == true_type){
     std::string derived_type_name = typeid(t).name();
     boost::throw_exception(
        archive_exception(archive_exception::unregistered_class)
     );
   }
 }}}
 Then in the debugger, I can inspect the value of derived_type_name to see
 what has not been properly registered.

 I think this would help people out immensely. I would submit a patch but
 not sure what would be acceptable.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/3212>
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