Re: [boost] [filesystem][program_options][serialization][test]fromcomp.lang.c++.moderated

From: bwood (brass_at_[hidden])
Date: 2006-05-13 20:44:18

This is a MIME encoded message.

--=_f61bd1ce9ba5ca5b5815a137ef66bf34
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

David Abrahams wrote:
>>"Le Chaud Lapin" <unoriginal_usern..._at_[hidden]> writes: 
>>More than anything in programming, I depend on type to create form. 
>>Versioning implies that types are semi-weak. 
>
>
>If versioning in serialized form implies that, then so do revisions of

>your type in a version control system.  So, basically, once you design

>a class, it never evolves? 
>

Along the lines of what Lapin is thinking, I think B.Ser's "versioning"
support is problematic.  For example, consider wanting to move (or 
delete) a data member out of a type between versions 1.1 and 1.2.
B.Ser needs that member to remain in the type in order to support 1.1. 

To answer the question: I make changes to types over time, but this
sort of a change is thwarted by the B.Ser approach.  An idea of how to
better structure a component can't be implemented in a direct way 
because the approach taken by the library isn't able to cope with the
fluidity of software development.  

If a server (version) has to support multiple versions of a type at
the same time, conditional compilation wouldn't be helpful either.
  
If members are simply being added to a type between version 1.1 and 
1.2, there remains this blurring of types.  

Brian
www.webEbenezer.net
--=_f61bd1ce9ba5ca5b5815a137ef66bf34--