Re: [Boost-users] [Serialization] purpose of GUID

From: Ingo Nolden (nuttygraphics_at_[hidden])
Date: 2007-05-16 16:27:12

Thank you for your answer,

I understand now. I saw the code, that would use the name. But I 
couldn't see why it was not invoked.
My actual intent is to use boost::serialization in a very special 
way. I am going to write a xml_archive replacement, that will enable 
me to read nearly arbitrary xml. My first plan was to write an own 
serialization. After looking into boost::serialization I thought it 
wouldn't be clever to not use as much of this great code as possible. 
I especially appreciate that the serialize function does not need to 
be virtual, and therefore can accept a non polymorphic archive. It 
seems there is a great level of savvy gone into that part.

An alternative for me would be to use an xml-parser directly. But 
that would not give me the option to model the xml by means of c++ classes.

Maybe somebody knows a library or some building blocks that may take 
me a step closer to my goal?

Ingo

At 03:55 16.05.2007, you wrote:
>
>"Ingo Nolden" <<mailto:nuttygraphics_at_[hidden]>nuttygraphics_at_[hidden]> 
>wrote in message 
><news:20070515191535.399222F8109_at_[hidden]>news:20070515191535.399222F8109_at_wowbagger.osl.iu.edu...
>Hi,
>
>I am a bit confused about the purpose of GUID. My understanding was, 
>that it is a user defined id for a class, so that the serialization 
>mechanism knows what types to instanciate on load. I somehow assumed 
>it to be a replacement (or equivalent) of the numbers in the 
>class_id attributes.
>
>*** This is correct.  But the "text ID" (GUID) is used only as a 
>last resort.  That
>basically boils down to derived pointers.  In other cases, the archive local
>class id can be generated and used instead. So that's what the serialization
>library does
>
>Robert Ramey
>
>
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