Re: [boost] [date_time-1.32.0] XML serialisation and not-a-date-time

From: Jeff Garland (jeff_at_[hidden])
Date: 2005-06-17 07:08:15

On Fri, 17 Jun 2005 12:24:55 +0100, Russell Hind wrote
> I've been serialising date_time stuff (ptimes to be specific).  They 
> weren't initialised when we were loading old files as they didn't 
> containt the information, so when the file is saved in the new 
> format, we get an entry in the XML archive:
> 
> <ptime_date class_id="26" tracking_level="0" version="0">
>    <date>not-a-date-time</date>
> </ptime_date>
> <ptime_time_duration class_id="27" tracking_level="0" version="0">		 
> <time_duration_hours>-1732919508</time_duration_hours>			 
> <time_duration_minutes>0</time_duration_minutes>				 
> <time_duration_seconds>22</time_duration_seconds>
>  
> <time_duration_fractional_seconds>775806</time_duration_fractional_seconds>
> </ptime_time_duration>
> 
> I realise 'not-a-date-time' is invalid, and would be happy if the 
> serialise failed in both directions, but currently it succeeds to 
> write it to an oarchive, but fails to read it from an iarchive.

That's not good.  And actually, 'not-a-date-time' is supposed to be like a
'null' value.  It's not-a-date-time, but it's not invalid either.
 
> I don't mind which way we go (i.e. both valid or both invalid) but 
> have oarchive working and iarchive failing isn't overly useful really.

I think clearly this needs to work in both directions.  Thanks for the report
-- we will work on a fix.

Jeff