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From: David Abrahams (dave_at_[hidden])
Date: 2006-05-15 08:49:30

bwood <brass_at_[hidden]> writes:

> 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.

No, you just read it and throw it away.

        if (version == 11)
            type_of_deleted_member ignored;
            ar & ignored;

Dave Abrahams
Boost Consulting

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