Re: [Boost-users] [serialization] serializing a pointer without causingobject tracking

Subject: Re: [Boost-users] [serialization] serializing a pointer without causingobject tracking
From: Stefan Strasser (strasser_at_[hidden])
Date: 2013-04-01 13:42:09

Am 30.03.2013 19:03, schrieb Robert Ramey:
>> is there a solution to this? is there a serialization wrapper that
>> says "don't track this type just because of this pointer"?
>
> so you want "don't track this particular save - but leave others as normal"
>
> Try something like
>
> class A ....
>
> class UntrackedA : public A {
> ...
> };
>
> BOOST_SERIALIZATION_TRACK(UntrackedA, track_never);

interesting idea. does this eventually track the object if the base 
class of UntrackedA is track_selectively and saved through a pointer 
anywhere else?

for example, an object graph that stores a pointer to its own root 
(through intermediaries in practice):

class A{ //tracking level: selectively
   void serialize(...){ ar & a; }
   A *a; //==this
};

class UntrackedA : A{ //tracking level: never
   void serialize(...){ ar & base_object<A>(*this); }
}

void save(UntrackedA *a){ ar << a; }

is "a" serialized twice, or tracked because of track_selectively and the 
pointer serialization in A::serialize?