Re: [Boost-users] Serialization newbie needs help

From: Hector C. (hhcalderon_at_[hidden])
Date: 2007-08-18 15:28:19

    Robert Ramey wrote:  
Dominick Layfield wrote:  
      
Frank Birbacher wrote:    
          
I now noticed that the link I posted does not reference excatly whatI meant to point at. Your code makes me think that you have not readwhat I wanted you to read. Here it goes.READ THIS:http://www.boost.org/libs/serialization/doc/rationale.html#trap      
        
Well, Hector may not have read this, but I did!
  C'mon, c'mon  ;-)      
  And it seems that Ihave the same problem as him.
  After I realized what the problem was, I found that it was rathercommon.
      
  If I make the object I want toserialize a const, the (completely incomprehensible) compile errorgoes away.  Any chance this could be added to a boost::serializationFAQ?    
    
you mean change the section named "rationale" to "FAQ"?  
Perhaps the comments before the trap (code in the hpp file), shouldhave a hyperlink.
      
It appears that I have a choice between (i) doing a const_cast onevery object I want to save, and (ii) inserting aBOOST_CLASS_TRACKING(XXX, boost::serialization::track_never) lineinto my source code.     
  After reading the rationale, I saw that option (ii) allows me topostpone the fight (and I took it). What is more important is that thetrap is there to remember it. Perhaps another solution would be toprovide a base class for tracking objects. This way, instead of usingthe macro, one could derive from such class: 

class MyClass : private boost::serialization::trackme

And this "trackme" class could have parameters in the constructor tosay whether it should be tracked:

MyClass()::MyClass()
: boost::serialization::trackme(never)
{}

or

MyClass()::MyClass()
: boost::serialization::trackme(selectively)
{}

etc ..

This solution would be in addition to the const-reference andBOOST_CLASS_TRACKING ones.      
It seems to me that a cleaner, simpler (and less ambitious) solutionwould just be to make serialization of pointers an error.    
  I wouldn't do that. C++ must allow me to shot myself if I'm notcareful!!

       
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