Re: [Boost-users] [serialization] skipping data

From: Joel de Guzman (joel_at_[hidden])
Date: 2006-07-10 01:52:55

Robert Ramey wrote:

>> (I'm particularly interested with XML archives. If I had control
>> over the xml parser, that would simply mean ignoring everything
>> from the current tag until the next matching tag is found).
> 
> I believe you do have the control you desire.  Here's a sketch:
> 
> suppose object A includes memory variables x, y and z
> 
> specialize template for xml input archives and type A
> 
> void load (boost::archive::xml_iarchive & ia, A & a, const unsigned 
> version){
>     ia & BOOST_SERIALIZATION_NVP(x);
>     if(version == 1){
>         // the next data should look like <x ...>...</x>
>         // skip over this data using your favorite xml parser - or use the 
> one
>         // that the serialization library uses - built with spirit - note 
> that this
>         // is not exposed by the library and is hidden from users as an
>         // implementation detail
>     }
>     ia & BOOST_SERIALIZATION_NVP(z);
> }

You didn't answer my question. What I am asking is what
do I write in the commented out portion of the code
using only Boost.Serialization interface. I do not want
to do any undocumented back-door tricks. I want a way to
skip reading some data regardless of what the archive type
is.

Regards,
-- 
Joel de Guzman
http://www.boost-consulting.com
http://spirit.sf.net