Re: [boost] [serialization] a proposal for an alternative to the new const-saving rule

From: David Abrahams (dave_at_[hidden])
Date: 2005-06-24 19:07:35

Darren Cook <darren_at_[hidden]> writes:

>>>>The hardest part is checking for equality. My proposal is
>>>>to follow a hash-based approach, which is effective both in
>>>>terms of complexity and space (one word per tracked object.),
>>...
>> Admittedly, hash-based checking is not 100% safe, ...
>
> I think this is unacceptable. If I have two objects A and B, and they do
> happen to hash to the same value, then B won't get saved. 

Only if they have the same address, in which case you've done
something wrong anyway and you want an assertion.

> However good the hash code is does not matter: this would stop me
> using the serialization library in anything mission critical.

I think one of us is misunderstanding the proposal.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com