Re: [boost] A question regarding serialization lib

From: JOAQUIN LOPEZ MU?Z (joaquin_at_[hidden])
Date: 2007-12-30 12:36:12

----- Mensaje original -----
De: Robert Ramey <ramey_at_[hidden]>
Fecha: Domingo, Diciembre 30, 2007 6:20 pm
Asunto: Re: [boost] A question regarding serialization lib
Para: boost_at_[hidden]

> Hmmmm - a very interesting question I've never considered.
> 
> All the serialization tests do the following: create a structure, 
> serialize to a file, load the file to a new structure and check
> for equality.
> 
> I would expect that in your test text1.doc would be identical to 
> text2.doc.
>
> UNLESS you have have floats/double in your classes.  In general, it 
> cannotbe guarenteed that there is a one-to-one correspondence 
> between floatiing point values as represented by binary in ram 
> to text numbers representedas decimal based text.  So in this case
> I would expect text1.doc to not be identical to text2.doc.
> 
> There may be other cases, but that's all that occurs to me right now.

Off the top of my hat, I think there's another case where 
text1 is not identical to text2, namely when using hashed
containers: If a rehash occurs during container population,
the resulting traversal order won't be the same as the original.
I don't know if this applies to the OP scenario.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo