Re: [Boost-users] [serialization] Serializing array of POD or custom type

Subject: Re: [Boost-users] [serialization] Serializing array of POD or custom type
From: Kim Gadecki (gadecki_at_[hidden])
Date: 2012-06-26 08:35:49

On 6/26/2012 3:56 PM, Krzysztof Czainski wrote:
> 2012/6/26 Kim Gadecki <gadecki_at_[hidden] <mailto:gadecki_at_[hidden]>>
>
>     Hi everyone.
>
>     I'm trying to work out how you serialize arrays using the boost
>     serializer. Here's a simplified example:
>
>        struct node_link
>        {
>            u32 node_A;
>            u32 node_B;
>        };
>
>        struct Node {
>            node_link*                  m_node_links_array;
>            int                                m_node_links_size;
>        };
>
>        // non-intrusive serialization
>            template<class Archive>
>            void serialize(Archive & ar, node_link& link, const
>     unsigned int version)
>            {
>                ar & link.node_A;
>                ar & link.node_B;
>            }
>
>            template<class Archive>
>            void serialize(Archive & ar, Node& node_data, const
>     unsigned int version)
>            {
>                ar &
>     boost::serialization::array<node_link>(node_data.m_node_links_array,
>     node_data.m_node_links_size);
>                ar & node_data.m_node_links_size;
>            }
>
>
> I'm guessing: how is deserialization of an array supposed to work, if 
> size is deserialized afterwords?
>
> Regards
> Kris

Right you are. It also looks like you need to manually allocate memory 
for the array:

             ar & node_data.m_node_links_size;
             node_data.m_node_links_array = new 
node_link[node_data.m_node_links_size];
             ar & 
boost::serialization::array<node_link>(node_data.m_node_links_array, 
node_data.m_node_links_size);

So I'll have to split save and load to take care of that.

Thanks.