[patch] libstdc++/61143 make unordered containers usable after move

[Paolo Carlini]

Hi,

On 05/15/2014 10:20 PM, François Dumont wrote:
> Hi
>
>     Here is a proposal to fix PR 61143. As explained in the PR I 
> finally prefer to leave the container in a valid state that is to say 
> with a non zero number of bucket, that is to say 1, after a move. This 
> bucket is stored directly in the container so not allocated to leave 
> the move operations noexcept qualified. With this evolution we could 
> even make the default constructor noexcept but I don't think it has 
> any interest.
Well, FWIW my opinion (I didn't follow the issue in detail), I think it 
would be a very nice improvement, not only because of the noexcept, but 
because of the avoided dynamic memory allocation, thus performance. I'm 
sure many other implementors agree ;)

Paolo.