Re: [Boost-users] [serialization] Sending user data to serialize()?

Subject: Re: [Boost-users] [serialization] Sending user data to serialize()?
From: Jeff Flinn (TriumphSprint2000_at_[hidden])
Date: 2009-02-04 16:17:37

Robert Dailey wrote:
>     Hi,
> 
>     I have a complex case I'm trying to work with. I may be doing this
>     completely wrong so if there is a better design for this I'm always
>     open for that. However for now I'm going to assume my particular
>     problem can be solved.
> 
>     There exists two classes: A and B. Class A is defined as such:
> 
>     class A
>     {
>     public:
>         template< typename Archive >
>         void load( Archive& archive, unsigned int )
>         {
>             archive & m_listOfB;
>         }
> 
>     private:
>         std::vector<int> m_listOfInt;
>         boost::ptr_vector<B> m_listOfB;
>     };
> 
>     And class B is defined roughly as:
> 
>     class B
>     {
>     public:
>         template< typename Archive >
>         void load( Archive& archive, unsigned int )
>         {
>             // Code isn't important here
>         }
>     };
> 
>     Here's the problem:
> 
>     For each B that is deserialized by A::load(), I need to pass in a
>     reference to m_listOfInt. So, essentially the load() function in B
>     would look something like this:
> 
>     void load( Archive& archive, unsigned int, std::vector<int>& listOfInt )
>     {
>     }
> 
>     I was hoping boost.bind could be used somewhere, but I just don't
>     see how. One way to solve the problem is to call B::load()
>     explicitly with the extra parameter, but I don't think that's an
>     appropriate solution. Any ideas on how to solve this? Or perhaps I'm
>     trying to solve the wrong problem.

What's wrong with:

 >     class A
 >     {
 >     public:
 >         template< typename Archive >
 >         void load( Archive& archive, unsigned int )
 >         {
 >             archive & m_listOfInt;
 >             archive & m_listOfB;
 >         }
 >
 >     private:
 >         std::vector<int> m_listOfInt;
 >         boost::ptr_vector<B> m_listOfB;
 >     };

I'm guessing that the missing B::load code IS important.

Jeff