Re: Limit template parameters in hashtable

[François Dumont <frs dot dumont at gmail dot com>]

On 07/21/2013 09:42 PM, Paolo Carlini wrote:
> Hi,
>
> On 07/21/2013 07:55 PM, Jonathan Wakely wrote:
> > Benjamin, Paolo, do you have any opinion on the ABI change for 4.9? 
> > It happens because the _M_bbegin member moves to a base class, so 
> > _hashtable changes layout, with members in a different order. 
> Basing also on what we discussed at the Cauldron, I think that at this 
> point we'll stabilize the ABI only in the next series, not in 4.9. In 
> practice, if we want to be picky in terms of linking object codes, 
> isn't 4.9 already incompatible with 4.8?
>
> Paolo.
Yes it is in fact. With adaptation for C++11 allocators the hashtable 
might now have no bucket after move. A module built with the 4.8 version 
will no work fine with such an instance, it might crash on a hash code % 
0 call.

François