Re: [boost] Re: some thoughts about serialisation

From: Dave Harris (brangdon_at_[hidden])
Date: 2003-01-14 16:56:39

In-Reply-To: <3E2337F3.E78312AF_at_[hidden]>
On Mon, 13 Jan 2003 23:04:35 +0100 Ares Lagae 
(ares.lagae_at_[hidden]) wrote:
> > How do you see archive versioning being done? For example,
> > suppose field TOTAL is a double in version 1 and a
> fixed-point user-defined type in version 2.
>
> The easy way would be to let a class have multiple class descriptors 
> (one for each version) and add the version number to the archive.

That sounds rather coarse granularity. A class which evolved a lot would 
have quite a few descriptors.

Another approach would be to publish the changed field under a different 
name, say TOTAL and TOTAL_2, in effect embedding version numbers into the 
field names rather than the descriptor.

-- Dave Harris