Re: [boost] [serialization] non-tracking wrapper?

Subject: Re: [boost] [serialization] non-tracking wrapper?
From: David Abrahams (dave_at_[hidden])
Date: 2008-11-12 12:25:46

on Wed Nov 12 2008, joaquin-AT-tid.es wrote:

> I think something to this effect can be implemented resorting to
> <drumroll>helper support</drumroll>. Non-tested pseudocode follows.
> The idea is not to supress tracking (which can't be done) but rather to move
> stack-based
> objects to a safe location so that Boost.Serialization does not get confused by
> objects
> with potentially the same stack address.
>
> template<typename T>
> struct non_tracking
> {
>  non_tracking():p(0){}
>  non_tracking(const T& t):p(&t){}
>
>  const T& get()const{return *p;}
>
>  const T* p;
>
>  struct helper
>  {
>    typedef std::list<T> table_type;
>    table_type table;
>  };
>
>  template<class Archive>
>  void save(Archive & ar,const unsigned int)const
>  {
>    helper::table_type& table=ar.get_helper<helper>().table;
>    table.push_back(*p);
>    ar<<table.back();
>  }
>
>  template<class Archive>
>  void load(Archive & ar,const unsigned int)
>  {
>    helper::table_type& table=ar.get_helper<helper>().table;
>    T t;
>    ar>>t;
     ^^^^^

Not that I really need this feature, but what is going to prevent the
library from doing the usual thing it does when deserializing T here?

-- 
Dave Abrahams
BoostPro Computing
http://www.boostpro.com